\u534a\u5305：\u4e00\u4e2a\u7bb1\u5b50\u5728\u8def\u4e0a\u7834\u4e86，\u4f60\u5148\u6536\u5230\u4e86\u534a\u4e2a\u7bb1\u5b50，\u7b2c\u4e8c\u5929\u624d\u6536\u5230\u53e6\u5916\u534a\u4e2a\u3002<\/p>\n<\/li>\n
\u8ba1\u7b97\u673a\u91cc\u7684 TCP\u534f\u8bae \u5c31\u662f\u8fd9\u6761\u201c\u4f20\u9001\u5e26\u201d\u3002\u5b83\u53ea\u8d1f\u8d23\u628a\u6570\u636e\u6e90\u6e90\u4e0d\u65ad\u5730\u9001\u8fc7\u53bb，\u4f46\u4e0d\u4fdd\u8bc1\u8fb9\u754c\u3002 \u6240\u4ee5，\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u7ea6\u5b9a：\u5728\u6bcf\u4e2a\u7eb8\u7bb1\u7684\u6700\u5916\u9762，\u8d34\u4e00\u5f20\u56fa\u5b9a\u683c\u5f0f\u7684\u201c\u5feb\u9012\u9762\u5355\u201d\u3002 \u53ea\u8981\u770b\u5230\u9762\u5355，\u5c31\u77e5\u9053\u8fd9\u4e2a\u7bb1\u5b50\u6709\u591a\u5927，\u91cc\u9762\u88c5\u7684\u662f\u4ec0\u4e48<\/p>\n
\u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784）<\/h2>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122459-6ac0f41b5ce25.png\")
<\/p>\n
\u56fe\u7247\u4e2d\u95f4\u90a3\u4e2a\u957f\u6761\u56fe，\u5c31\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u201c\u5feb\u9012\u9762\u5355\u201d\u3002\u6211\u4eec\u4ece\u5de6\u5230\u53f3\u770b：<\/p>\n
1. Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u9762\u5355\u7684\u7b2c\u4e00\u884c，\u5199\u7740\u201c\u8fd9\u4e2a\u5305\u88f9\u603b\u5171\u6709\u591a\u91cd（\u591a\u5c11\u5b57\u8282）\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4e3a\u4ec0\u4e48\u56fa\u5b9a4\u5b57\u8282：\u56e0\u4e3a4\u4e2a\u5b57\u8282\u53ef\u4ee5\u8868\u793a\u5f88\u5927\u7684\u6570\u5b57（\u6700\u5927\u80fd\u8868\u793a40\u591a\u4ebf），\u8db3\u591f\u63cf\u8ff0\u7edd\u5927\u591a\u6570\u5305\u88f9\u7684\u5927\u5c0f\u4e86\u3002<\/p>\n<\/li>\n
- \n
\u600e\u4e48\u7528：\u63a5\u6536\u65b9\u53ea\u8981\u5148\u8bfb\u8fd94\u4e2a\u5b57\u8282，\u5c31\u77e5\u9053\u201c\u54e6，\u539f\u6765\u540e\u9762\u8fd8\u6709100\u4e2a\u5b57\u8282\u7684\u6570\u636e，\u90a3\u6211\u5c31\u6b7b\u7b49，\u76f4\u5230\u6536\u6ee1100\u4e2a\u5b57\u8282，\u6211\u624d\u7b97\u6536\u5b8c\u8fd9\u4e00\u4e2a\u5305\u88f9\u3002\u201d<\/p>\n<\/li>\n<\/ul>\n
2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u9762\u5355\u7684\u7b2c\u4e8c\u884c，\u5199\u7740\u201c\u8fd9\u4e2a\u5305\u88f9\u662f\u5e72\u4ec0\u4e48\u7528\u7684\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4e3a\u4ec0\u4e48\u9700\u8981：\u56e0\u4e3a\u7f51\u7edc\u901a\u4fe1\u5f88\u590d\u6742，\u6709\u7684\u662f\u8bf7\u6c42\u522b\u4eba\u529e\u4e8b（RPC\u8c03\u7528），\u6709\u7684\u662f\u8ba2\u9605\u65b0\u95fb（\u53d1\u5e03\/\u8ba2\u9605），\u6709\u7684\u662f\u6ce8\u518c\u670d\u52a1\u3002\u63a5\u6536\u65b9\u62ff\u5230\u5305\u88f9\u540e，\u5f97\u5148\u770b\u7c7b\u578b，\u624d\u77e5\u9053\u8981\u4ea4\u7ed9\u54ea\u4e2a\u90e8\u95e8\u53bb\u5904\u7406\u3002<\/p>\n<\/li>\n
- \n
\u4f8b\u5b50：\u6bd4\u5982 MType=1 \u4ee3\u8868RPC\u8bf7\u6c42，MType=2 \u4ee3\u8868RPC\u54cd\u5e94\u3002<\/p>\n<\/li>\n<\/ul>\n
3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u9762\u5355\u7684\u7b2c\u4e09\u884c，\u5199\u7740\u201c\u6211\u7684\u5feb\u9012\u5355\u53f7\u6709\u591a\u957f\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4e3a\u4ec0\u4e48\u9700\u8981：\u56e0\u4e3a\u540e\u9762\u7684\u201c\u5feb\u9012\u5355\u53f7（MID）\u201d\u957f\u5ea6\u662f\u4e0d\u56fa\u5b9a\u7684\u3002\u6709\u7684\u5355\u53f7\u957f，\u6709\u7684\u5355\u53f7\u77ed\u3002\u6240\u4ee5\u5fc5\u987b\u5148\u7528\u4e00\u4e2a\u56fa\u5b9a\u76844\u5b57\u8282，\u544a\u8bc9\u63a5\u6536\u65b9\u201c\u5355\u53f7\u5360\u4e86\u591a\u5c11\u4e2a\u5b57\u8282\u201d\u3002<\/p>\n<\/li>\n<\/ul>\n
4. MID（\u6d88\u606fID）\u2014\u2014 \u957f\u5ea6\u53ef\u53d8<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u201c\u5feb\u9012\u5355\u53f7\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4f5c\u7528：\u7528\u6765\u552f\u4e00\u6807\u8bc6\u8fd9\u4e00\u4e2a\u5305\u88f9\u3002\u6bd4\u5982\u4f60\u53d1\u4e863\u4e2a\u8bf7\u6c42\u7ed9\u670d\u52a1\u5668，\u670d\u52a1\u5668\u56de\u4e863\u4e2a\u54cd\u5e94，\u4f60\u600e\u4e48\u77e5\u9053\u54ea\u4e2a\u54cd\u5e94\u5bf9\u5e94\u54ea\u4e2a\u8bf7\u6c42？\u5c31\u662f\u9760\u8fd9\u4e2aMID\u6765\u5339\u914d\u7684\u3002<\/p>\n<\/li>\n
- \n
\u957f\u5ea6：\u7531\u524d\u9762\u7684 IDLength \u51b3\u5b9a\u3002\u6bd4\u5982 IDLength=8，\u90a3\u8fd9\u91cc\u5c31\u53608\u4e2a\u5b57\u8282\u3002<\/p>\n<\/li>\n<\/ul>\n
5. Body（\u6d88\u606f\u4f53）\u2014\u2014 \u957f\u5ea6\u53ef\u53d8<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u201c\u5305\u88f9\u91cc\u771f\u6b63\u88c5\u7684\u4e1c\u897f\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4f5c\u7528：\u4e5f\u5c31\u662f\u5b9e\u9645\u8981\u4f20\u8f93\u7684\u4e1a\u52a1\u6570\u636e\u3002\u6bd4\u5982\u4f60\u8c03\u7528\u4e00\u4e2a\u201c\u8ba1\u7b97\u52a0\u6cd5\u201d\u7684\u51fd\u6570，Body\u91cc\u5c31\u88c5\u7740 1+1 \u8fd9\u4e2a\u53c2\u6570\u3002<\/p>\n<\/li>\n
- \n
\u957f\u5ea6：\u5b83\u7684\u957f\u5ea6 = \u603b\u957f\u5ea6（Length） – \u9762\u5355\u4e0a\u5176\u4ed6\u6240\u6709\u5b57\u6bb5\u7684\u957f\u5ea6<\/p>\n<\/li>\n<\/ul>\n
\u5b9e\u6218\u6f14\u7ec3 \u2014\u2014 \u63a5\u6536\u65b9\u5982\u4f55\u62c6\u5305\u88f9？<\/h2>\n
\u5047\u8bbe\u4f60\u662f\u4e00\u4e2a\u63a5\u6536\u65b9，\u6536\u5230\u4e86\u8fd9\u4e32\u6570\u636e，\u4f60\u8be5\u600e\u4e48\u89e3\u6790？<\/p>\n
- \n
\u5148\u8bfb\u524d4\u4e2a\u5b57\u8282（Length）：\u4f60\u4e00\u770b，\u503c\u662f 100\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u603b\u5171\u6709100\u4e2a\u5b57\u8282\u3002\u540e\u9762\u8fd8\u670996\u4e2a\u5b57\u8282（\u56e0\u4e3a\u6211\u5df2\u7ecf\u8bfb\u4e864\u4e2a\u4e86）\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb4\u4e2a\u5b57\u8282（MType）：\u4f60\u4e00\u770b，\u503c\u662f 1\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u54e6，\u8fd9\u662f\u4e00\u4e2aRPC\u8bf7\u6c42，\u6211\u5f97\u51c6\u5907\u53bb\u5904\u7406\u4e1a\u52a1\u903b\u8f91\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u518d\u8bfb4\u4e2a\u5b57\u8282（IDLength）：\u4f60\u4e00\u770b，\u503c\u662f 8\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u7684\u5355\u53f7\u67098\u4e2a\u5b57\u8282\u957f\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb8\u4e2a\u5b57\u8282（MID）：\u4f60\u8bfb\u5230\u4e86\u5177\u4f53\u7684\u5355\u53f7，\u6bd4\u5982 10086\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8bb0\u4f4f\u8fd9\u4e2a\u5355\u53f7，\u7b49\u4e0b\u56de\u590d\u7684\u65f6\u5019\u8981\u5e26\u4e0a\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u6700\u540e\u8bfb\u5269\u4e0b\u7684\u6240\u6709\u5b57\u8282（Body）：\u7b97\u4e00\u4e0b，\u603b\u5171100\u5b57\u8282，\u6211\u5df2\u7ecf\u7528\u4e86 4+4+4+8=20 \u5b57\u8282，\u8fd8\u5269 80 \u5b57\u8282\u3002\u4f60\u5c31\u628a\u8fd980\u4e2a\u5b57\u8282\u5168\u8bfb\u51fa\u6765\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8fd9\u5c31\u662f\u771f\u6b63\u7684\u6570\u636e\u5185\u5bb9\u4e86\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
\u5b8c\u7f8e！ \u4f60\u6210\u529f\u5730\u4ece\u8fde\u7eed\u4e0d\u65ad\u7684\u7f51\u7edc\u6570\u636e\u6d41\u4e2d，\u7cbe\u51c6\u5730\u5207\u5206\u51fa\u4e86\u5b8c\u6574\u7684\u4e00\u6761\u6d88\u606f<\/p>\n
\u4ee3\u7801\u5b9e\u6218 \u2014\u2014 \u600e\u4e48\u6253\u5305，\u600e\u4e48\u62c6\u5305？<\/h2>\n\u7b2c\u4e00\u6b65：\u660e\u786e\u56fe\u7247\u91cc\u7684\u534f\u8bae\u7ed3\u6784<\/h4>\n
\u6839\u636e\u56fe\u7247，\u6211\u4eec\u7684\u6570\u636e\u5305\u957f\u8fd9\u6837：<\/p>\n
[Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f] <\/p>\n
\n- \n
Length：\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MType：\u6d88\u606f\u7c7b\u578b（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
IDLength：MID \u7684\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MID：\u6d88\u606f ID（\u957f\u5ea6\u7531 IDLength \u51b3\u5b9a）<\/p>\n<\/li>\n
- \n
Body：\u6b63\u6587（\u5269\u4e0b\u7684\u90fd\u662f\u5b83）<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e8c\u6b65：\u53d1\u9001\u65b9\u6253\u5305（\u62fc\u5b57\u7b26\u4e32）<\/h4>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570：\u628a\u6570\u5b57\u53d8\u6210 4 \u4f4d\u5b57\u7b26\u4e32\u3002\u6bd4\u5982 5 \u53d8\u6210 "0005"
\nstring to4(int num) {
\n string s = to_string(num);
\n while (s.length() < 4) s = "0" + s;
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body) {
\n \/\/ 1. \u7b97 IDLength（MID \u7684\u957f\u5ea6）
\n int idLen = mid.length();<\/p>\n
\/\/ 2. \u7b97 Length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n \/\/ \u540e\u9762\u6709：MType(4) + IDLength(4) + MID(idLen) + Body(body.length())
\n int length = 4 + 4 + idLen + body.length();<\/p>\n
\/\/ 3. \u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305！）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
int main() {
\n \/\/ \u53d1\u9001\u4e00\u6761\u6d88\u606f：\u7c7b\u578b1，ID\u662f"1001"，\u6b63\u6587\u662f"Hello"
\n string packet = pack(1, "1001", "Hello");
\n cout << "\u6253\u5305\u7ed3\u679c: " << packet << endl;
\n return 0;
\n} <\/p>\n
\u8fd0\u884c\u7ed3\u679c：<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122500-6ac0f41cdf21a.png\")
<\/p>\n
\u6211\u4eec\u6765\u62c6\u89e3\u4e00\u4e0b\u8fd9\u4e2a\u7ed3\u679c：<\/p>\n
\n- \n
0017 \u2192 Length（\u540e\u9762\u603b\u5171 17 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
0001 \u2192 MType（\u7c7b\u578b 1）<\/p>\n<\/li>\n
- \n
0004 \u2192 IDLength（MID \u6709 4 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
1001 \u2192 MID<\/p>\n<\/li>\n
- \n
Hello \u2192 Body<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e09\u6b65：\u63a5\u6536\u65b9\u62c6\u5305（\u5207\u5b57\u7b26\u4e32）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n
\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n
#include <iostream>
\n#include <string><\/p>\n
using namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n
\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n
\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
void unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n
\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n
\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n
\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n
\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n
\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\n
int main()
\n{
\n \/\/ 1\u3001\u53d1\u9001\u65b9\u6253\u5305
\n string packet = pack(1, "1001", "hello");
\n cout << "\u6253\u5305\u7ed3\u679c：" << packet << endl;<\/p>\n
\/\/ 2\u3001\u89e3\u5305
\n unpack(packet);<\/p>\n
return 0;
\n} <\/p>\n
\u8fd0\u884c\u7ed3\u679c：<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122500-6ac0f41ce86cd.png\")
<\/p>\n
\u7b2c\u56db\u6b65：\u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305（\u6838\u5fc3\u4e2d\u7684\u6838\u5fc3）<\/h4>\n
\u73b0\u5b9e\u4e2d，\u7f51\u7edc\u4e0d\u4f1a\u4e56\u4e56\u5730\u4e00\u6761\u4e00\u6761\u53d1\u3002\u6211\u4eec\u7528\u4e00\u4e2a\u5927\u53e3\u888b（buffer）\u6765\u88c5\u6570\u636e\u3002<\/p>\n
string buffer = ""; \/\/ \u5927\u53e3\u888b<\/p>\n
\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer() {
\n while (true) {
\n \/\/ 1. \u53e3\u888b\u91cc\u8fde 4 \u4e2a\u5b57\u7b26（Length）\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21\u5427
\n if (buffer.length() < 4) break;<\/p>\n
\/\/ 2. \u5077\u770b\u524d 4 \u4e2a\u5b57\u7b26，\u7b97\u51fa\u6574\u4e2a\u5305\u5e94\u8be5\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0, 4));<\/p>\n
\/\/ 3. \u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6 = 4（Length\u81ea\u5df1） + length（\u540e\u9762\u7684\u4e1c\u897f）
\n int totalLen = 4 + length;<\/p>\n
\/\/ 4. \u53e3\u888b\u91cc\u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if (buffer.length() >= totalLen) {
\n \/\/ \u591f\u4e86！\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0, totalLen);<\/p>\n
\/\/ \u4ece\u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n
\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305（\u7528\u4e0a\u9762\u7684 unpack \u903b\u8f91）
\n cout << "\u2705 \u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f: " << packet << endl;
\n } else {
\n \/\/ \u4e0d\u591f！\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u23f3 \u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e…" << endl;
\n break;
\n }
\n }
\n}<\/p>\n
\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid onDataReceived(string data) {
\n cout << "📩 \u6536\u5230\u6570\u636e: " << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/ \u5c1d\u8bd5\u5904\u7406
\n} <\/p>\n
\u7b2c\u4e94\u6b65：\u5b8c\u6574\u6d4b\u8bd5（\u628a\u524d\u9762\u7684 pack \u548c unpack \u90fd\u62fc\u8d77\u6765）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n
\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n
#include <iostream>
\n#include <string><\/p>\n
using namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n
\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n
\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
void unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n
\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n
\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n
\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n
\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n
\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\n
\/\/ \u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305
\nstring buffer = "";<\/p>\n
\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer(){
\n while(true){
\n \/\/ 1\u3001\u53e3\u888b\u91cc4\u4e2a\u5b57\u6bb5\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21
\n if(buffer.length() < 4) break;<\/p>\n
\/\/ 2\u3001\u5077\u770b\u4e00\u4e0b4\u4e2a\u5b57\u7b26，\u7b97\u51fa\u8fd9\u4e2a\u5305\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0,4));<\/p>\n
\/\/ 3\u3001\u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6
\n int totalLen = 4 + length;<\/p>\n
\/\/ 4\u3001\u53e3\u888b\u80fd\u4e0d\u80fd\u88c5\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if(buffer.length() >= totalLen){
\n \/\/ \u591f\u4e86，\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0,totalLen);<\/p>\n
\/\/ \u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n
\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305<\/p>\n
cout << "\u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f：" << endl;
\n unpack(packet);
\n }else
\n {
\n \/\/ \u89e3\u51b3\u534a\u5305
\n \/\/ \u4e0d\u591f,\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e" << endl;
\n break;
\n }
\n }
\n}<\/p>\n
\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid on(string data){
\n cout << "\u6536\u5230\u6570\u636e：" << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/\u5c1d\u8bd5\u5904\u7406
\n}<\/p>\n
int main()
\n{
\n \/\/ \u7c98\u5305\u548c\u8d34\u5305
\n string packet1 = pack(1, "1001", "hello");
\n string packet2 = pack(1, "1002", "ok");<\/p>\n
cout << "\u573a\u666f\u4e00：\u6b63\u5e38\u5904\u7406" << endl;
\n on(packet1);<\/p>\n
cout << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1 + packet2);<\/p>\n
cout << endl << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1.substr(0,10));
\n on(packet1.substr(10));<\/p>\n
return 0;
\n} <\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122501-6ac0f41d01f7f.png\")
<\/p>\n
\u603b\u7ed3：\u4e09\u53e5\u8bdd\u518d\u6b21\u6df1\u523b\u7406\u89e3LV\u534f\u8bae<\/p>\n
- \n
\u6253\u5305：Length + MType + IDLength + MID + Body，\u7528 + \u62fc\u8d77\u6765\u3002<\/p>\n<\/li>\n
- \n
\u62c6\u5305：\u5148\u8bfb\u524d 4 \u4e2a\u5b57\u7b26\u62ff\u5230 Length，\u5c31\u77e5\u9053\u540e\u9762\u8fd8\u6709\u591a\u5c11\u5b57\u7b26\u3002<\/p>\n<\/li>\n
- \n
\u5904\u7406\u7c98\u5305\/\u534a\u5305：\u6570\u636e\u5148\u4e22\u8fdb buffer，\u5faa\u73af\u68c0\u67e5 buffer \u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305（4 + Length），\u591f\u4e86\u5c31\u5207\u51fa\u6765，\u4e0d\u591f\u5c31\u7b49<\/p>\n<\/li>\n
\u6838\u5fc3\u516c\u5f0f：<\/p>\n
\u5b8c\u6574\u5305\u957f\u5ea6 = 4 + Length<\/p>\n","protected":false},"excerpt":{"rendered":"
\u76ee\u5f55
\n\u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305）
\n\u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784）
\n1. Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n4<\/p>\n","protected":false},"author":2,"featured_media":112483,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,43,78],"topic":[],"class_list":["post-112487","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-43","tag-78"],"yoast_head":"\n
\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/112487.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u76ee\u5f55 \u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305） \u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784） 1. Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 4\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/112487.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-03T12:25:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122459-6ac0f41b5ce25.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/112487.html\",\"name\":\"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-10-03T12:25:02+00:00\",\"dateModified\":\"2026-10-03T12:25:02+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/112487.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/112487.html","og_locale":"zh_CN","og_type":"article","og_title":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u76ee\u5f55 \u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305） \u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784） 1. 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\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u9762\u5355\u7684\u7b2c\u4e00\u884c，\u5199\u7740\u201c\u8fd9\u4e2a\u5305\u88f9\u603b\u5171\u6709\u591a\u91cd（\u591a\u5c11\u5b57\u8282）\u201d\u3002<\/p>\n<\/li>\n
\u4e3a\u4ec0\u4e48\u56fa\u5b9a4\u5b57\u8282：\u56e0\u4e3a4\u4e2a\u5b57\u8282\u53ef\u4ee5\u8868\u793a\u5f88\u5927\u7684\u6570\u5b57（\u6700\u5927\u80fd\u8868\u793a40\u591a\u4ebf），\u8db3\u591f\u63cf\u8ff0\u7edd\u5927\u591a\u6570\u5305\u88f9\u7684\u5927\u5c0f\u4e86\u3002<\/p>\n<\/li>\n
\u600e\u4e48\u7528：\u63a5\u6536\u65b9\u53ea\u8981\u5148\u8bfb\u8fd94\u4e2a\u5b57\u8282，\u5c31\u77e5\u9053\u201c\u54e6，\u539f\u6765\u540e\u9762\u8fd8\u6709100\u4e2a\u5b57\u8282\u7684\u6570\u636e，\u90a3\u6211\u5c31\u6b7b\u7b49，\u76f4\u5230\u6536\u6ee1100\u4e2a\u5b57\u8282，\u6211\u624d\u7b97\u6536\u5b8c\u8fd9\u4e00\u4e2a\u5305\u88f9\u3002\u201d<\/p>\n<\/li>\n<\/ul>\n
2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u9762\u5355\u7684\u7b2c\u4e8c\u884c，\u5199\u7740\u201c\u8fd9\u4e2a\u5305\u88f9\u662f\u5e72\u4ec0\u4e48\u7528\u7684\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4e3a\u4ec0\u4e48\u9700\u8981：\u56e0\u4e3a\u7f51\u7edc\u901a\u4fe1\u5f88\u590d\u6742，\u6709\u7684\u662f\u8bf7\u6c42\u522b\u4eba\u529e\u4e8b（RPC\u8c03\u7528），\u6709\u7684\u662f\u8ba2\u9605\u65b0\u95fb（\u53d1\u5e03\/\u8ba2\u9605），\u6709\u7684\u662f\u6ce8\u518c\u670d\u52a1\u3002\u63a5\u6536\u65b9\u62ff\u5230\u5305\u88f9\u540e，\u5f97\u5148\u770b\u7c7b\u578b，\u624d\u77e5\u9053\u8981\u4ea4\u7ed9\u54ea\u4e2a\u90e8\u95e8\u53bb\u5904\u7406\u3002<\/p>\n<\/li>\n
- \n
\u4f8b\u5b50：\u6bd4\u5982 MType=1 \u4ee3\u8868RPC\u8bf7\u6c42，MType=2 \u4ee3\u8868RPC\u54cd\u5e94\u3002<\/p>\n<\/li>\n<\/ul>\n
3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u9762\u5355\u7684\u7b2c\u4e09\u884c，\u5199\u7740\u201c\u6211\u7684\u5feb\u9012\u5355\u53f7\u6709\u591a\u957f\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4e3a\u4ec0\u4e48\u9700\u8981：\u56e0\u4e3a\u540e\u9762\u7684\u201c\u5feb\u9012\u5355\u53f7（MID）\u201d\u957f\u5ea6\u662f\u4e0d\u56fa\u5b9a\u7684\u3002\u6709\u7684\u5355\u53f7\u957f，\u6709\u7684\u5355\u53f7\u77ed\u3002\u6240\u4ee5\u5fc5\u987b\u5148\u7528\u4e00\u4e2a\u56fa\u5b9a\u76844\u5b57\u8282，\u544a\u8bc9\u63a5\u6536\u65b9\u201c\u5355\u53f7\u5360\u4e86\u591a\u5c11\u4e2a\u5b57\u8282\u201d\u3002<\/p>\n<\/li>\n<\/ul>\n
4. MID（\u6d88\u606fID）\u2014\u2014 \u957f\u5ea6\u53ef\u53d8<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u201c\u5feb\u9012\u5355\u53f7\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4f5c\u7528：\u7528\u6765\u552f\u4e00\u6807\u8bc6\u8fd9\u4e00\u4e2a\u5305\u88f9\u3002\u6bd4\u5982\u4f60\u53d1\u4e863\u4e2a\u8bf7\u6c42\u7ed9\u670d\u52a1\u5668，\u670d\u52a1\u5668\u56de\u4e863\u4e2a\u54cd\u5e94，\u4f60\u600e\u4e48\u77e5\u9053\u54ea\u4e2a\u54cd\u5e94\u5bf9\u5e94\u54ea\u4e2a\u8bf7\u6c42？\u5c31\u662f\u9760\u8fd9\u4e2aMID\u6765\u5339\u914d\u7684\u3002<\/p>\n<\/li>\n
- \n
\u957f\u5ea6：\u7531\u524d\u9762\u7684 IDLength \u51b3\u5b9a\u3002\u6bd4\u5982 IDLength=8，\u90a3\u8fd9\u91cc\u5c31\u53608\u4e2a\u5b57\u8282\u3002<\/p>\n<\/li>\n<\/ul>\n
5. Body（\u6d88\u606f\u4f53）\u2014\u2014 \u957f\u5ea6\u53ef\u53d8<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u201c\u5305\u88f9\u91cc\u771f\u6b63\u88c5\u7684\u4e1c\u897f\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4f5c\u7528：\u4e5f\u5c31\u662f\u5b9e\u9645\u8981\u4f20\u8f93\u7684\u4e1a\u52a1\u6570\u636e\u3002\u6bd4\u5982\u4f60\u8c03\u7528\u4e00\u4e2a\u201c\u8ba1\u7b97\u52a0\u6cd5\u201d\u7684\u51fd\u6570，Body\u91cc\u5c31\u88c5\u7740 1+1 \u8fd9\u4e2a\u53c2\u6570\u3002<\/p>\n<\/li>\n
- \n
\u957f\u5ea6：\u5b83\u7684\u957f\u5ea6 = \u603b\u957f\u5ea6（Length） – \u9762\u5355\u4e0a\u5176\u4ed6\u6240\u6709\u5b57\u6bb5\u7684\u957f\u5ea6<\/p>\n<\/li>\n<\/ul>\n
\u5b9e\u6218\u6f14\u7ec3 \u2014\u2014 \u63a5\u6536\u65b9\u5982\u4f55\u62c6\u5305\u88f9？<\/h2>\n
\u5047\u8bbe\u4f60\u662f\u4e00\u4e2a\u63a5\u6536\u65b9，\u6536\u5230\u4e86\u8fd9\u4e32\u6570\u636e，\u4f60\u8be5\u600e\u4e48\u89e3\u6790？<\/p>\n
- \n
\u5148\u8bfb\u524d4\u4e2a\u5b57\u8282（Length）：\u4f60\u4e00\u770b，\u503c\u662f 100\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u603b\u5171\u6709100\u4e2a\u5b57\u8282\u3002\u540e\u9762\u8fd8\u670996\u4e2a\u5b57\u8282（\u56e0\u4e3a\u6211\u5df2\u7ecf\u8bfb\u4e864\u4e2a\u4e86）\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb4\u4e2a\u5b57\u8282（MType）：\u4f60\u4e00\u770b，\u503c\u662f 1\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u54e6，\u8fd9\u662f\u4e00\u4e2aRPC\u8bf7\u6c42，\u6211\u5f97\u51c6\u5907\u53bb\u5904\u7406\u4e1a\u52a1\u903b\u8f91\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u518d\u8bfb4\u4e2a\u5b57\u8282（IDLength）：\u4f60\u4e00\u770b，\u503c\u662f 8\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u7684\u5355\u53f7\u67098\u4e2a\u5b57\u8282\u957f\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb8\u4e2a\u5b57\u8282（MID）：\u4f60\u8bfb\u5230\u4e86\u5177\u4f53\u7684\u5355\u53f7，\u6bd4\u5982 10086\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8bb0\u4f4f\u8fd9\u4e2a\u5355\u53f7，\u7b49\u4e0b\u56de\u590d\u7684\u65f6\u5019\u8981\u5e26\u4e0a\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u6700\u540e\u8bfb\u5269\u4e0b\u7684\u6240\u6709\u5b57\u8282（Body）：\u7b97\u4e00\u4e0b，\u603b\u5171100\u5b57\u8282，\u6211\u5df2\u7ecf\u7528\u4e86 4+4+4+8=20 \u5b57\u8282，\u8fd8\u5269 80 \u5b57\u8282\u3002\u4f60\u5c31\u628a\u8fd980\u4e2a\u5b57\u8282\u5168\u8bfb\u51fa\u6765\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8fd9\u5c31\u662f\u771f\u6b63\u7684\u6570\u636e\u5185\u5bb9\u4e86\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
\u5b8c\u7f8e！ \u4f60\u6210\u529f\u5730\u4ece\u8fde\u7eed\u4e0d\u65ad\u7684\u7f51\u7edc\u6570\u636e\u6d41\u4e2d，\u7cbe\u51c6\u5730\u5207\u5206\u51fa\u4e86\u5b8c\u6574\u7684\u4e00\u6761\u6d88\u606f<\/p>\n
\u4ee3\u7801\u5b9e\u6218 \u2014\u2014 \u600e\u4e48\u6253\u5305，\u600e\u4e48\u62c6\u5305？<\/h2>\n\u7b2c\u4e00\u6b65：\u660e\u786e\u56fe\u7247\u91cc\u7684\u534f\u8bae\u7ed3\u6784<\/h4>\n
\u6839\u636e\u56fe\u7247，\u6211\u4eec\u7684\u6570\u636e\u5305\u957f\u8fd9\u6837：<\/p>\n
[Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f] <\/p>\n
\n- \n
Length：\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MType：\u6d88\u606f\u7c7b\u578b（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
IDLength：MID \u7684\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MID：\u6d88\u606f ID（\u957f\u5ea6\u7531 IDLength \u51b3\u5b9a）<\/p>\n<\/li>\n
- \n
Body：\u6b63\u6587（\u5269\u4e0b\u7684\u90fd\u662f\u5b83）<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e8c\u6b65：\u53d1\u9001\u65b9\u6253\u5305（\u62fc\u5b57\u7b26\u4e32）<\/h4>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570：\u628a\u6570\u5b57\u53d8\u6210 4 \u4f4d\u5b57\u7b26\u4e32\u3002\u6bd4\u5982 5 \u53d8\u6210 "0005"
\nstring to4(int num) {
\n string s = to_string(num);
\n while (s.length() < 4) s = "0" + s;
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body) {
\n \/\/ 1. \u7b97 IDLength（MID \u7684\u957f\u5ea6）
\n int idLen = mid.length();<\/p>\n
\/\/ 2. \u7b97 Length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n \/\/ \u540e\u9762\u6709：MType(4) + IDLength(4) + MID(idLen) + Body(body.length())
\n int length = 4 + 4 + idLen + body.length();<\/p>\n
\/\/ 3. \u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305！）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
int main() {
\n \/\/ \u53d1\u9001\u4e00\u6761\u6d88\u606f：\u7c7b\u578b1，ID\u662f"1001"，\u6b63\u6587\u662f"Hello"
\n string packet = pack(1, "1001", "Hello");
\n cout << "\u6253\u5305\u7ed3\u679c: " << packet << endl;
\n return 0;
\n} <\/p>\n
\u8fd0\u884c\u7ed3\u679c：<\/p>\n
<\/p>\n
\u6211\u4eec\u6765\u62c6\u89e3\u4e00\u4e0b\u8fd9\u4e2a\u7ed3\u679c：<\/p>\n
\n- \n
0017 \u2192 Length（\u540e\u9762\u603b\u5171 17 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
0001 \u2192 MType（\u7c7b\u578b 1）<\/p>\n<\/li>\n
- \n
0004 \u2192 IDLength（MID \u6709 4 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
1001 \u2192 MID<\/p>\n<\/li>\n
- \n
Hello \u2192 Body<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e09\u6b65：\u63a5\u6536\u65b9\u62c6\u5305（\u5207\u5b57\u7b26\u4e32）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n
\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n
#include <iostream>
\n#include <string><\/p>\n
using namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n
\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n
\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
void unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n
\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n
\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n
\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n
\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n
\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\n
int main()
\n{
\n \/\/ 1\u3001\u53d1\u9001\u65b9\u6253\u5305
\n string packet = pack(1, "1001", "hello");
\n cout << "\u6253\u5305\u7ed3\u679c：" << packet << endl;<\/p>\n
\/\/ 2\u3001\u89e3\u5305
\n unpack(packet);<\/p>\n
return 0;
\n} <\/p>\n
\u8fd0\u884c\u7ed3\u679c：<\/p>\n
<\/p>\n
\u7b2c\u56db\u6b65：\u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305（\u6838\u5fc3\u4e2d\u7684\u6838\u5fc3）<\/h4>\n
\u73b0\u5b9e\u4e2d，\u7f51\u7edc\u4e0d\u4f1a\u4e56\u4e56\u5730\u4e00\u6761\u4e00\u6761\u53d1\u3002\u6211\u4eec\u7528\u4e00\u4e2a\u5927\u53e3\u888b（buffer）\u6765\u88c5\u6570\u636e\u3002<\/p>\n
string buffer = ""; \/\/ \u5927\u53e3\u888b<\/p>\n
\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer() {
\n while (true) {
\n \/\/ 1. \u53e3\u888b\u91cc\u8fde 4 \u4e2a\u5b57\u7b26（Length）\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21\u5427
\n if (buffer.length() < 4) break;<\/p>\n
\/\/ 2. \u5077\u770b\u524d 4 \u4e2a\u5b57\u7b26，\u7b97\u51fa\u6574\u4e2a\u5305\u5e94\u8be5\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0, 4));<\/p>\n
\/\/ 3. \u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6 = 4（Length\u81ea\u5df1） + length（\u540e\u9762\u7684\u4e1c\u897f）
\n int totalLen = 4 + length;<\/p>\n
\/\/ 4. \u53e3\u888b\u91cc\u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if (buffer.length() >= totalLen) {
\n \/\/ \u591f\u4e86！\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0, totalLen);<\/p>\n
\/\/ \u4ece\u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n
\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305（\u7528\u4e0a\u9762\u7684 unpack \u903b\u8f91）
\n cout << "\u2705 \u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f: " << packet << endl;
\n } else {
\n \/\/ \u4e0d\u591f！\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u23f3 \u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e…" << endl;
\n break;
\n }
\n }
\n}<\/p>\n
\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid onDataReceived(string data) {
\n cout << "📩 \u6536\u5230\u6570\u636e: " << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/ \u5c1d\u8bd5\u5904\u7406
\n} <\/p>\n
\u7b2c\u4e94\u6b65：\u5b8c\u6574\u6d4b\u8bd5（\u628a\u524d\u9762\u7684 pack \u548c unpack \u90fd\u62fc\u8d77\u6765）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n
\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n
#include <iostream>
\n#include <string><\/p>\n
using namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n
\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n
\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
void unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n
\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n
\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n
\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n
\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n
\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\n
\/\/ \u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305
\nstring buffer = "";<\/p>\n
\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer(){
\n while(true){
\n \/\/ 1\u3001\u53e3\u888b\u91cc4\u4e2a\u5b57\u6bb5\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21
\n if(buffer.length() < 4) break;<\/p>\n
\/\/ 2\u3001\u5077\u770b\u4e00\u4e0b4\u4e2a\u5b57\u7b26，\u7b97\u51fa\u8fd9\u4e2a\u5305\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0,4));<\/p>\n
\/\/ 3\u3001\u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6
\n int totalLen = 4 + length;<\/p>\n
\/\/ 4\u3001\u53e3\u888b\u80fd\u4e0d\u80fd\u88c5\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if(buffer.length() >= totalLen){
\n \/\/ \u591f\u4e86，\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0,totalLen);<\/p>\n
\/\/ \u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n
\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305<\/p>\n
cout << "\u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f：" << endl;
\n unpack(packet);
\n }else
\n {
\n \/\/ \u89e3\u51b3\u534a\u5305
\n \/\/ \u4e0d\u591f,\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e" << endl;
\n break;
\n }
\n }
\n}<\/p>\n
\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid on(string data){
\n cout << "\u6536\u5230\u6570\u636e：" << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/\u5c1d\u8bd5\u5904\u7406
\n}<\/p>\n
int main()
\n{
\n \/\/ \u7c98\u5305\u548c\u8d34\u5305
\n string packet1 = pack(1, "1001", "hello");
\n string packet2 = pack(1, "1002", "ok");<\/p>\n
cout << "\u573a\u666f\u4e00：\u6b63\u5e38\u5904\u7406" << endl;
\n on(packet1);<\/p>\n
cout << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1 + packet2);<\/p>\n
cout << endl << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1.substr(0,10));
\n on(packet1.substr(10));<\/p>\n
return 0;
\n} <\/p>\n
<\/p>\n
\u603b\u7ed3：\u4e09\u53e5\u8bdd\u518d\u6b21\u6df1\u523b\u7406\u89e3LV\u534f\u8bae<\/p>\n
- \n
\u6253\u5305：Length + MType + IDLength + MID + Body，\u7528 + \u62fc\u8d77\u6765\u3002<\/p>\n<\/li>\n
- \n
\u62c6\u5305：\u5148\u8bfb\u524d 4 \u4e2a\u5b57\u7b26\u62ff\u5230 Length，\u5c31\u77e5\u9053\u540e\u9762\u8fd8\u6709\u591a\u5c11\u5b57\u7b26\u3002<\/p>\n<\/li>\n
- \n
\u5904\u7406\u7c98\u5305\/\u534a\u5305：\u6570\u636e\u5148\u4e22\u8fdb buffer，\u5faa\u73af\u68c0\u67e5 buffer \u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305（4 + Length），\u591f\u4e86\u5c31\u5207\u51fa\u6765，\u4e0d\u591f\u5c31\u7b49<\/p>\n<\/li>\n
\u6838\u5fc3\u516c\u5f0f：<\/p>\n
\u5b8c\u6574\u5305\u957f\u5ea6 = 4 + Length<\/p>\n","protected":false},"excerpt":{"rendered":"
\u76ee\u5f55
\n\u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305）
\n\u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784）
\n1. Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n4<\/p>\n","protected":false},"author":2,"featured_media":112483,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,43,78],"topic":[],"class_list":["post-112487","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-43","tag-78"],"yoast_head":"\n
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Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 4\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/112487.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-03T12:25:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122459-6ac0f41b5ce25.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/112487.html\",\"name\":\"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-10-03T12:25:02+00:00\",\"dateModified\":\"2026-10-03T12:25:02+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/112487.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/112487.html","og_locale":"zh_CN","og_type":"article","og_title":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u76ee\u5f55 \u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305） \u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784） 1. Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 4","og_url":"https:\/\/www.wsisp.com\/helps\/112487.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-10-03T12:25:02+00:00","og_image":[{"url":"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122459-6ac0f41b5ce25.png"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"6 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/112487.html","url":"https:\/\/www.wsisp.com\/helps\/112487.html","name":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-10-03T12:25:02+00:00","dateModified":"2026-10-03T12:25:02+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/112487.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/112487","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=112487"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/112487\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media\/112483"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=112487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=112487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=112487"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=112487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u9762\u5355\u7684\u7b2c\u4e8c\u884c，\u5199\u7740\u201c\u8fd9\u4e2a\u5305\u88f9\u662f\u5e72\u4ec0\u4e48\u7528\u7684\u201d\u3002<\/p>\n<\/li>\n
\u4e3a\u4ec0\u4e48\u9700\u8981：\u56e0\u4e3a\u7f51\u7edc\u901a\u4fe1\u5f88\u590d\u6742，\u6709\u7684\u662f\u8bf7\u6c42\u522b\u4eba\u529e\u4e8b（RPC\u8c03\u7528），\u6709\u7684\u662f\u8ba2\u9605\u65b0\u95fb（\u53d1\u5e03\/\u8ba2\u9605），\u6709\u7684\u662f\u6ce8\u518c\u670d\u52a1\u3002\u63a5\u6536\u65b9\u62ff\u5230\u5305\u88f9\u540e，\u5f97\u5148\u770b\u7c7b\u578b，\u624d\u77e5\u9053\u8981\u4ea4\u7ed9\u54ea\u4e2a\u90e8\u95e8\u53bb\u5904\u7406\u3002<\/p>\n<\/li>\n
\u4f8b\u5b50：\u6bd4\u5982 MType=1 \u4ee3\u8868RPC\u8bf7\u6c42，MType=2 \u4ee3\u8868RPC\u54cd\u5e94\u3002<\/p>\n<\/li>\n<\/ul>\n
3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u9762\u5355\u7684\u7b2c\u4e09\u884c，\u5199\u7740\u201c\u6211\u7684\u5feb\u9012\u5355\u53f7\u6709\u591a\u957f\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4e3a\u4ec0\u4e48\u9700\u8981：\u56e0\u4e3a\u540e\u9762\u7684\u201c\u5feb\u9012\u5355\u53f7（MID）\u201d\u957f\u5ea6\u662f\u4e0d\u56fa\u5b9a\u7684\u3002\u6709\u7684\u5355\u53f7\u957f，\u6709\u7684\u5355\u53f7\u77ed\u3002\u6240\u4ee5\u5fc5\u987b\u5148\u7528\u4e00\u4e2a\u56fa\u5b9a\u76844\u5b57\u8282，\u544a\u8bc9\u63a5\u6536\u65b9\u201c\u5355\u53f7\u5360\u4e86\u591a\u5c11\u4e2a\u5b57\u8282\u201d\u3002<\/p>\n<\/li>\n<\/ul>\n
4. MID（\u6d88\u606fID）\u2014\u2014 \u957f\u5ea6\u53ef\u53d8<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u201c\u5feb\u9012\u5355\u53f7\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4f5c\u7528：\u7528\u6765\u552f\u4e00\u6807\u8bc6\u8fd9\u4e00\u4e2a\u5305\u88f9\u3002\u6bd4\u5982\u4f60\u53d1\u4e863\u4e2a\u8bf7\u6c42\u7ed9\u670d\u52a1\u5668，\u670d\u52a1\u5668\u56de\u4e863\u4e2a\u54cd\u5e94，\u4f60\u600e\u4e48\u77e5\u9053\u54ea\u4e2a\u54cd\u5e94\u5bf9\u5e94\u54ea\u4e2a\u8bf7\u6c42？\u5c31\u662f\u9760\u8fd9\u4e2aMID\u6765\u5339\u914d\u7684\u3002<\/p>\n<\/li>\n
- \n
\u957f\u5ea6：\u7531\u524d\u9762\u7684 IDLength \u51b3\u5b9a\u3002\u6bd4\u5982 IDLength=8，\u90a3\u8fd9\u91cc\u5c31\u53608\u4e2a\u5b57\u8282\u3002<\/p>\n<\/li>\n<\/ul>\n
5. Body（\u6d88\u606f\u4f53）\u2014\u2014 \u957f\u5ea6\u53ef\u53d8<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u201c\u5305\u88f9\u91cc\u771f\u6b63\u88c5\u7684\u4e1c\u897f\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4f5c\u7528：\u4e5f\u5c31\u662f\u5b9e\u9645\u8981\u4f20\u8f93\u7684\u4e1a\u52a1\u6570\u636e\u3002\u6bd4\u5982\u4f60\u8c03\u7528\u4e00\u4e2a\u201c\u8ba1\u7b97\u52a0\u6cd5\u201d\u7684\u51fd\u6570，Body\u91cc\u5c31\u88c5\u7740 1+1 \u8fd9\u4e2a\u53c2\u6570\u3002<\/p>\n<\/li>\n
- \n
\u957f\u5ea6：\u5b83\u7684\u957f\u5ea6 = \u603b\u957f\u5ea6（Length） – \u9762\u5355\u4e0a\u5176\u4ed6\u6240\u6709\u5b57\u6bb5\u7684\u957f\u5ea6<\/p>\n<\/li>\n<\/ul>\n
\u5b9e\u6218\u6f14\u7ec3 \u2014\u2014 \u63a5\u6536\u65b9\u5982\u4f55\u62c6\u5305\u88f9？<\/h2>\n
\u5047\u8bbe\u4f60\u662f\u4e00\u4e2a\u63a5\u6536\u65b9，\u6536\u5230\u4e86\u8fd9\u4e32\u6570\u636e，\u4f60\u8be5\u600e\u4e48\u89e3\u6790？<\/p>\n
- \n
\u5148\u8bfb\u524d4\u4e2a\u5b57\u8282（Length）：\u4f60\u4e00\u770b，\u503c\u662f 100\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u603b\u5171\u6709100\u4e2a\u5b57\u8282\u3002\u540e\u9762\u8fd8\u670996\u4e2a\u5b57\u8282（\u56e0\u4e3a\u6211\u5df2\u7ecf\u8bfb\u4e864\u4e2a\u4e86）\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb4\u4e2a\u5b57\u8282（MType）：\u4f60\u4e00\u770b，\u503c\u662f 1\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u54e6，\u8fd9\u662f\u4e00\u4e2aRPC\u8bf7\u6c42，\u6211\u5f97\u51c6\u5907\u53bb\u5904\u7406\u4e1a\u52a1\u903b\u8f91\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u518d\u8bfb4\u4e2a\u5b57\u8282（IDLength）：\u4f60\u4e00\u770b，\u503c\u662f 8\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u7684\u5355\u53f7\u67098\u4e2a\u5b57\u8282\u957f\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb8\u4e2a\u5b57\u8282（MID）：\u4f60\u8bfb\u5230\u4e86\u5177\u4f53\u7684\u5355\u53f7，\u6bd4\u5982 10086\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8bb0\u4f4f\u8fd9\u4e2a\u5355\u53f7，\u7b49\u4e0b\u56de\u590d\u7684\u65f6\u5019\u8981\u5e26\u4e0a\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u6700\u540e\u8bfb\u5269\u4e0b\u7684\u6240\u6709\u5b57\u8282（Body）：\u7b97\u4e00\u4e0b，\u603b\u5171100\u5b57\u8282，\u6211\u5df2\u7ecf\u7528\u4e86 4+4+4+8=20 \u5b57\u8282，\u8fd8\u5269 80 \u5b57\u8282\u3002\u4f60\u5c31\u628a\u8fd980\u4e2a\u5b57\u8282\u5168\u8bfb\u51fa\u6765\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8fd9\u5c31\u662f\u771f\u6b63\u7684\u6570\u636e\u5185\u5bb9\u4e86\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
\u5b8c\u7f8e！ \u4f60\u6210\u529f\u5730\u4ece\u8fde\u7eed\u4e0d\u65ad\u7684\u7f51\u7edc\u6570\u636e\u6d41\u4e2d，\u7cbe\u51c6\u5730\u5207\u5206\u51fa\u4e86\u5b8c\u6574\u7684\u4e00\u6761\u6d88\u606f<\/p>\n
\u4ee3\u7801\u5b9e\u6218 \u2014\u2014 \u600e\u4e48\u6253\u5305，\u600e\u4e48\u62c6\u5305？<\/h2>\n\u7b2c\u4e00\u6b65：\u660e\u786e\u56fe\u7247\u91cc\u7684\u534f\u8bae\u7ed3\u6784<\/h4>\n
\u6839\u636e\u56fe\u7247，\u6211\u4eec\u7684\u6570\u636e\u5305\u957f\u8fd9\u6837：<\/p>\n
[Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f] <\/p>\n
\n- \n
Length：\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MType：\u6d88\u606f\u7c7b\u578b（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
IDLength：MID \u7684\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MID：\u6d88\u606f ID（\u957f\u5ea6\u7531 IDLength \u51b3\u5b9a）<\/p>\n<\/li>\n
- \n
Body：\u6b63\u6587（\u5269\u4e0b\u7684\u90fd\u662f\u5b83）<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e8c\u6b65：\u53d1\u9001\u65b9\u6253\u5305（\u62fc\u5b57\u7b26\u4e32）<\/h4>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570：\u628a\u6570\u5b57\u53d8\u6210 4 \u4f4d\u5b57\u7b26\u4e32\u3002\u6bd4\u5982 5 \u53d8\u6210 "0005"
\nstring to4(int num) {
\n string s = to_string(num);
\n while (s.length() < 4) s = "0" + s;
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body) {
\n \/\/ 1. \u7b97 IDLength（MID \u7684\u957f\u5ea6）
\n int idLen = mid.length();<\/p>\n
\/\/ 2. \u7b97 Length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n \/\/ \u540e\u9762\u6709：MType(4) + IDLength(4) + MID(idLen) + Body(body.length())
\n int length = 4 + 4 + idLen + body.length();<\/p>\n
\/\/ 3. \u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305！）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
int main() {
\n \/\/ \u53d1\u9001\u4e00\u6761\u6d88\u606f：\u7c7b\u578b1，ID\u662f"1001"，\u6b63\u6587\u662f"Hello"
\n string packet = pack(1, "1001", "Hello");
\n cout << "\u6253\u5305\u7ed3\u679c: " << packet << endl;
\n return 0;
\n} <\/p>\n
\u8fd0\u884c\u7ed3\u679c：<\/p>\n
<\/p>\n
\u6211\u4eec\u6765\u62c6\u89e3\u4e00\u4e0b\u8fd9\u4e2a\u7ed3\u679c：<\/p>\n
\n- \n
0017 \u2192 Length（\u540e\u9762\u603b\u5171 17 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
0001 \u2192 MType（\u7c7b\u578b 1）<\/p>\n<\/li>\n
- \n
0004 \u2192 IDLength（MID \u6709 4 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
1001 \u2192 MID<\/p>\n<\/li>\n
- \n
Hello \u2192 Body<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e09\u6b65：\u63a5\u6536\u65b9\u62c6\u5305（\u5207\u5b57\u7b26\u4e32）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n
\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n
#include <iostream>
\n#include <string><\/p>\n
using namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n
\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n
\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
void unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n
\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n
\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n
\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n
\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n
\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\n
int main()
\n{
\n \/\/ 1\u3001\u53d1\u9001\u65b9\u6253\u5305
\n string packet = pack(1, "1001", "hello");
\n cout << "\u6253\u5305\u7ed3\u679c：" << packet << endl;<\/p>\n
\/\/ 2\u3001\u89e3\u5305
\n unpack(packet);<\/p>\n
return 0;
\n} <\/p>\n
\u8fd0\u884c\u7ed3\u679c：<\/p>\n
<\/p>\n
\u7b2c\u56db\u6b65：\u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305（\u6838\u5fc3\u4e2d\u7684\u6838\u5fc3）<\/h4>\n
\u73b0\u5b9e\u4e2d，\u7f51\u7edc\u4e0d\u4f1a\u4e56\u4e56\u5730\u4e00\u6761\u4e00\u6761\u53d1\u3002\u6211\u4eec\u7528\u4e00\u4e2a\u5927\u53e3\u888b（buffer）\u6765\u88c5\u6570\u636e\u3002<\/p>\n
string buffer = ""; \/\/ \u5927\u53e3\u888b<\/p>\n
\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer() {
\n while (true) {
\n \/\/ 1. \u53e3\u888b\u91cc\u8fde 4 \u4e2a\u5b57\u7b26（Length）\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21\u5427
\n if (buffer.length() < 4) break;<\/p>\n
\/\/ 2. \u5077\u770b\u524d 4 \u4e2a\u5b57\u7b26，\u7b97\u51fa\u6574\u4e2a\u5305\u5e94\u8be5\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0, 4));<\/p>\n
\/\/ 3. \u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6 = 4（Length\u81ea\u5df1） + length（\u540e\u9762\u7684\u4e1c\u897f）
\n int totalLen = 4 + length;<\/p>\n
\/\/ 4. \u53e3\u888b\u91cc\u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if (buffer.length() >= totalLen) {
\n \/\/ \u591f\u4e86！\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0, totalLen);<\/p>\n
\/\/ \u4ece\u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n
\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305（\u7528\u4e0a\u9762\u7684 unpack \u903b\u8f91）
\n cout << "\u2705 \u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f: " << packet << endl;
\n } else {
\n \/\/ \u4e0d\u591f！\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u23f3 \u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e…" << endl;
\n break;
\n }
\n }
\n}<\/p>\n
\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid onDataReceived(string data) {
\n cout << "📩 \u6536\u5230\u6570\u636e: " << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/ \u5c1d\u8bd5\u5904\u7406
\n} <\/p>\n
\u7b2c\u4e94\u6b65：\u5b8c\u6574\u6d4b\u8bd5（\u628a\u524d\u9762\u7684 pack \u548c unpack \u90fd\u62fc\u8d77\u6765）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n
\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n
#include <iostream>
\n#include <string><\/p>\n
using namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n
\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n
\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
void unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n
\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n
\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n
\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n
\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n
\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\n
\/\/ \u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305
\nstring buffer = "";<\/p>\n
\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer(){
\n while(true){
\n \/\/ 1\u3001\u53e3\u888b\u91cc4\u4e2a\u5b57\u6bb5\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21
\n if(buffer.length() < 4) break;<\/p>\n
\/\/ 2\u3001\u5077\u770b\u4e00\u4e0b4\u4e2a\u5b57\u7b26，\u7b97\u51fa\u8fd9\u4e2a\u5305\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0,4));<\/p>\n
\/\/ 3\u3001\u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6
\n int totalLen = 4 + length;<\/p>\n
\/\/ 4\u3001\u53e3\u888b\u80fd\u4e0d\u80fd\u88c5\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if(buffer.length() >= totalLen){
\n \/\/ \u591f\u4e86，\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0,totalLen);<\/p>\n
\/\/ \u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n
\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305<\/p>\n
cout << "\u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f：" << endl;
\n unpack(packet);
\n }else
\n {
\n \/\/ \u89e3\u51b3\u534a\u5305
\n \/\/ \u4e0d\u591f,\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e" << endl;
\n break;
\n }
\n }
\n}<\/p>\n
\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid on(string data){
\n cout << "\u6536\u5230\u6570\u636e：" << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/\u5c1d\u8bd5\u5904\u7406
\n}<\/p>\n
int main()
\n{
\n \/\/ \u7c98\u5305\u548c\u8d34\u5305
\n string packet1 = pack(1, "1001", "hello");
\n string packet2 = pack(1, "1002", "ok");<\/p>\n
cout << "\u573a\u666f\u4e00：\u6b63\u5e38\u5904\u7406" << endl;
\n on(packet1);<\/p>\n
cout << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1 + packet2);<\/p>\n
cout << endl << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1.substr(0,10));
\n on(packet1.substr(10));<\/p>\n
return 0;
\n} <\/p>\n
<\/p>\n
\u603b\u7ed3：\u4e09\u53e5\u8bdd\u518d\u6b21\u6df1\u523b\u7406\u89e3LV\u534f\u8bae<\/p>\n
- \n
\u6253\u5305：Length + MType + IDLength + MID + Body，\u7528 + \u62fc\u8d77\u6765\u3002<\/p>\n<\/li>\n
- \n
\u62c6\u5305：\u5148\u8bfb\u524d 4 \u4e2a\u5b57\u7b26\u62ff\u5230 Length，\u5c31\u77e5\u9053\u540e\u9762\u8fd8\u6709\u591a\u5c11\u5b57\u7b26\u3002<\/p>\n<\/li>\n
- \n
\u5904\u7406\u7c98\u5305\/\u534a\u5305：\u6570\u636e\u5148\u4e22\u8fdb buffer，\u5faa\u73af\u68c0\u67e5 buffer \u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305（4 + Length），\u591f\u4e86\u5c31\u5207\u51fa\u6765，\u4e0d\u591f\u5c31\u7b49<\/p>\n<\/li>\n
\u6838\u5fc3\u516c\u5f0f：<\/p>\n
\u5b8c\u6574\u5305\u957f\u5ea6 = 4 + Length<\/p>\n","protected":false},"excerpt":{"rendered":"
\u76ee\u5f55
\n\u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305）
\n\u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784）
\n1. Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n4<\/p>\n","protected":false},"author":2,"featured_media":112483,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,43,78],"topic":[],"class_list":["post-112487","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-43","tag-78"],"yoast_head":"\n
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Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 4\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/112487.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-03T12:25:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122459-6ac0f41b5ce25.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/112487.html\",\"name\":\"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-10-03T12:25:02+00:00\",\"dateModified\":\"2026-10-03T12:25:02+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/112487.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/112487.html","og_locale":"zh_CN","og_type":"article","og_title":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u76ee\u5f55 \u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305） \u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784） 1. Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 4","og_url":"https:\/\/www.wsisp.com\/helps\/112487.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-10-03T12:25:02+00:00","og_image":[{"url":"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122459-6ac0f41b5ce25.png"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"6 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/112487.html","url":"https:\/\/www.wsisp.com\/helps\/112487.html","name":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-10-03T12:25:02+00:00","dateModified":"2026-10-03T12:25:02+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/112487.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/112487","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=112487"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/112487\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media\/112483"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=112487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=112487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=112487"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=112487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u9762\u5355\u7684\u7b2c\u4e09\u884c，\u5199\u7740\u201c\u6211\u7684\u5feb\u9012\u5355\u53f7\u6709\u591a\u957f\u201d\u3002<\/p>\n<\/li>\n
\u4e3a\u4ec0\u4e48\u9700\u8981：\u56e0\u4e3a\u540e\u9762\u7684\u201c\u5feb\u9012\u5355\u53f7（MID）\u201d\u957f\u5ea6\u662f\u4e0d\u56fa\u5b9a\u7684\u3002\u6709\u7684\u5355\u53f7\u957f，\u6709\u7684\u5355\u53f7\u77ed\u3002\u6240\u4ee5\u5fc5\u987b\u5148\u7528\u4e00\u4e2a\u56fa\u5b9a\u76844\u5b57\u8282，\u544a\u8bc9\u63a5\u6536\u65b9\u201c\u5355\u53f7\u5360\u4e86\u591a\u5c11\u4e2a\u5b57\u8282\u201d\u3002<\/p>\n<\/li>\n<\/ul>\n
4. MID（\u6d88\u606fID）\u2014\u2014 \u957f\u5ea6\u53ef\u53d8<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u201c\u5feb\u9012\u5355\u53f7\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4f5c\u7528：\u7528\u6765\u552f\u4e00\u6807\u8bc6\u8fd9\u4e00\u4e2a\u5305\u88f9\u3002\u6bd4\u5982\u4f60\u53d1\u4e863\u4e2a\u8bf7\u6c42\u7ed9\u670d\u52a1\u5668，\u670d\u52a1\u5668\u56de\u4e863\u4e2a\u54cd\u5e94，\u4f60\u600e\u4e48\u77e5\u9053\u54ea\u4e2a\u54cd\u5e94\u5bf9\u5e94\u54ea\u4e2a\u8bf7\u6c42？\u5c31\u662f\u9760\u8fd9\u4e2aMID\u6765\u5339\u914d\u7684\u3002<\/p>\n<\/li>\n
- \n
\u957f\u5ea6：\u7531\u524d\u9762\u7684 IDLength \u51b3\u5b9a\u3002\u6bd4\u5982 IDLength=8，\u90a3\u8fd9\u91cc\u5c31\u53608\u4e2a\u5b57\u8282\u3002<\/p>\n<\/li>\n<\/ul>\n
5. Body（\u6d88\u606f\u4f53）\u2014\u2014 \u957f\u5ea6\u53ef\u53d8<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u201c\u5305\u88f9\u91cc\u771f\u6b63\u88c5\u7684\u4e1c\u897f\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4f5c\u7528：\u4e5f\u5c31\u662f\u5b9e\u9645\u8981\u4f20\u8f93\u7684\u4e1a\u52a1\u6570\u636e\u3002\u6bd4\u5982\u4f60\u8c03\u7528\u4e00\u4e2a\u201c\u8ba1\u7b97\u52a0\u6cd5\u201d\u7684\u51fd\u6570，Body\u91cc\u5c31\u88c5\u7740 1+1 \u8fd9\u4e2a\u53c2\u6570\u3002<\/p>\n<\/li>\n
- \n
\u957f\u5ea6：\u5b83\u7684\u957f\u5ea6 = \u603b\u957f\u5ea6（Length） – \u9762\u5355\u4e0a\u5176\u4ed6\u6240\u6709\u5b57\u6bb5\u7684\u957f\u5ea6<\/p>\n<\/li>\n<\/ul>\n
\u5b9e\u6218\u6f14\u7ec3 \u2014\u2014 \u63a5\u6536\u65b9\u5982\u4f55\u62c6\u5305\u88f9？<\/h2>\n
\u5047\u8bbe\u4f60\u662f\u4e00\u4e2a\u63a5\u6536\u65b9，\u6536\u5230\u4e86\u8fd9\u4e32\u6570\u636e，\u4f60\u8be5\u600e\u4e48\u89e3\u6790？<\/p>\n
- \n
\u5148\u8bfb\u524d4\u4e2a\u5b57\u8282（Length）：\u4f60\u4e00\u770b，\u503c\u662f 100\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u603b\u5171\u6709100\u4e2a\u5b57\u8282\u3002\u540e\u9762\u8fd8\u670996\u4e2a\u5b57\u8282（\u56e0\u4e3a\u6211\u5df2\u7ecf\u8bfb\u4e864\u4e2a\u4e86）\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb4\u4e2a\u5b57\u8282（MType）：\u4f60\u4e00\u770b，\u503c\u662f 1\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u54e6，\u8fd9\u662f\u4e00\u4e2aRPC\u8bf7\u6c42，\u6211\u5f97\u51c6\u5907\u53bb\u5904\u7406\u4e1a\u52a1\u903b\u8f91\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u518d\u8bfb4\u4e2a\u5b57\u8282（IDLength）：\u4f60\u4e00\u770b，\u503c\u662f 8\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u7684\u5355\u53f7\u67098\u4e2a\u5b57\u8282\u957f\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb8\u4e2a\u5b57\u8282（MID）：\u4f60\u8bfb\u5230\u4e86\u5177\u4f53\u7684\u5355\u53f7，\u6bd4\u5982 10086\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8bb0\u4f4f\u8fd9\u4e2a\u5355\u53f7，\u7b49\u4e0b\u56de\u590d\u7684\u65f6\u5019\u8981\u5e26\u4e0a\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u6700\u540e\u8bfb\u5269\u4e0b\u7684\u6240\u6709\u5b57\u8282（Body）：\u7b97\u4e00\u4e0b，\u603b\u5171100\u5b57\u8282，\u6211\u5df2\u7ecf\u7528\u4e86 4+4+4+8=20 \u5b57\u8282，\u8fd8\u5269 80 \u5b57\u8282\u3002\u4f60\u5c31\u628a\u8fd980\u4e2a\u5b57\u8282\u5168\u8bfb\u51fa\u6765\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8fd9\u5c31\u662f\u771f\u6b63\u7684\u6570\u636e\u5185\u5bb9\u4e86\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
\u5b8c\u7f8e！ \u4f60\u6210\u529f\u5730\u4ece\u8fde\u7eed\u4e0d\u65ad\u7684\u7f51\u7edc\u6570\u636e\u6d41\u4e2d，\u7cbe\u51c6\u5730\u5207\u5206\u51fa\u4e86\u5b8c\u6574\u7684\u4e00\u6761\u6d88\u606f<\/p>\n
\u4ee3\u7801\u5b9e\u6218 \u2014\u2014 \u600e\u4e48\u6253\u5305，\u600e\u4e48\u62c6\u5305？<\/h2>\n\u7b2c\u4e00\u6b65：\u660e\u786e\u56fe\u7247\u91cc\u7684\u534f\u8bae\u7ed3\u6784<\/h4>\n
\u6839\u636e\u56fe\u7247，\u6211\u4eec\u7684\u6570\u636e\u5305\u957f\u8fd9\u6837：<\/p>\n
[Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f] <\/p>\n
\n- \n
Length：\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MType：\u6d88\u606f\u7c7b\u578b（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
IDLength：MID \u7684\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MID：\u6d88\u606f ID（\u957f\u5ea6\u7531 IDLength \u51b3\u5b9a）<\/p>\n<\/li>\n
- \n
Body：\u6b63\u6587（\u5269\u4e0b\u7684\u90fd\u662f\u5b83）<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e8c\u6b65：\u53d1\u9001\u65b9\u6253\u5305（\u62fc\u5b57\u7b26\u4e32）<\/h4>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570：\u628a\u6570\u5b57\u53d8\u6210 4 \u4f4d\u5b57\u7b26\u4e32\u3002\u6bd4\u5982 5 \u53d8\u6210 "0005"
\nstring to4(int num) {
\n string s = to_string(num);
\n while (s.length() < 4) s = "0" + s;
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body) {
\n \/\/ 1. \u7b97 IDLength（MID \u7684\u957f\u5ea6）
\n int idLen = mid.length();<\/p>\n
\/\/ 2. \u7b97 Length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n \/\/ \u540e\u9762\u6709：MType(4) + IDLength(4) + MID(idLen) + Body(body.length())
\n int length = 4 + 4 + idLen + body.length();<\/p>\n
\/\/ 3. \u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305！）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
int main() {
\n \/\/ \u53d1\u9001\u4e00\u6761\u6d88\u606f：\u7c7b\u578b1，ID\u662f"1001"，\u6b63\u6587\u662f"Hello"
\n string packet = pack(1, "1001", "Hello");
\n cout << "\u6253\u5305\u7ed3\u679c: " << packet << endl;
\n return 0;
\n} <\/p>\n
\u8fd0\u884c\u7ed3\u679c：<\/p>\n
<\/p>\n
\u6211\u4eec\u6765\u62c6\u89e3\u4e00\u4e0b\u8fd9\u4e2a\u7ed3\u679c：<\/p>\n
\n- \n
0017 \u2192 Length（\u540e\u9762\u603b\u5171 17 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
0001 \u2192 MType（\u7c7b\u578b 1）<\/p>\n<\/li>\n
- \n
0004 \u2192 IDLength（MID \u6709 4 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
1001 \u2192 MID<\/p>\n<\/li>\n
- \n
Hello \u2192 Body<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e09\u6b65：\u63a5\u6536\u65b9\u62c6\u5305（\u5207\u5b57\u7b26\u4e32）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n
\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n
#include <iostream>
\n#include <string><\/p>\n
using namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n
\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n
\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
void unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n
\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n
\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n
\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n
\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n
\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\n
int main()
\n{
\n \/\/ 1\u3001\u53d1\u9001\u65b9\u6253\u5305
\n string packet = pack(1, "1001", "hello");
\n cout << "\u6253\u5305\u7ed3\u679c：" << packet << endl;<\/p>\n
\/\/ 2\u3001\u89e3\u5305
\n unpack(packet);<\/p>\n
return 0;
\n} <\/p>\n
\u8fd0\u884c\u7ed3\u679c：<\/p>\n
<\/p>\n
\u7b2c\u56db\u6b65：\u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305（\u6838\u5fc3\u4e2d\u7684\u6838\u5fc3）<\/h4>\n
\u73b0\u5b9e\u4e2d，\u7f51\u7edc\u4e0d\u4f1a\u4e56\u4e56\u5730\u4e00\u6761\u4e00\u6761\u53d1\u3002\u6211\u4eec\u7528\u4e00\u4e2a\u5927\u53e3\u888b（buffer）\u6765\u88c5\u6570\u636e\u3002<\/p>\n
string buffer = ""; \/\/ \u5927\u53e3\u888b<\/p>\n
\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer() {
\n while (true) {
\n \/\/ 1. \u53e3\u888b\u91cc\u8fde 4 \u4e2a\u5b57\u7b26（Length）\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21\u5427
\n if (buffer.length() < 4) break;<\/p>\n
\/\/ 2. \u5077\u770b\u524d 4 \u4e2a\u5b57\u7b26，\u7b97\u51fa\u6574\u4e2a\u5305\u5e94\u8be5\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0, 4));<\/p>\n
\/\/ 3. \u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6 = 4（Length\u81ea\u5df1） + length（\u540e\u9762\u7684\u4e1c\u897f）
\n int totalLen = 4 + length;<\/p>\n
\/\/ 4. \u53e3\u888b\u91cc\u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if (buffer.length() >= totalLen) {
\n \/\/ \u591f\u4e86！\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0, totalLen);<\/p>\n
\/\/ \u4ece\u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n
\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305（\u7528\u4e0a\u9762\u7684 unpack \u903b\u8f91）
\n cout << "\u2705 \u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f: " << packet << endl;
\n } else {
\n \/\/ \u4e0d\u591f！\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u23f3 \u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e…" << endl;
\n break;
\n }
\n }
\n}<\/p>\n
\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid onDataReceived(string data) {
\n cout << "📩 \u6536\u5230\u6570\u636e: " << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/ \u5c1d\u8bd5\u5904\u7406
\n} <\/p>\n
\u7b2c\u4e94\u6b65：\u5b8c\u6574\u6d4b\u8bd5（\u628a\u524d\u9762\u7684 pack \u548c unpack \u90fd\u62fc\u8d77\u6765）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n
\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n
#include <iostream>
\n#include <string><\/p>\n
using namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n
\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n
\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
void unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n
\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n
\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n
\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n
\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n
\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\n
\/\/ \u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305
\nstring buffer = "";<\/p>\n
\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer(){
\n while(true){
\n \/\/ 1\u3001\u53e3\u888b\u91cc4\u4e2a\u5b57\u6bb5\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21
\n if(buffer.length() < 4) break;<\/p>\n
\/\/ 2\u3001\u5077\u770b\u4e00\u4e0b4\u4e2a\u5b57\u7b26，\u7b97\u51fa\u8fd9\u4e2a\u5305\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0,4));<\/p>\n
\/\/ 3\u3001\u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6
\n int totalLen = 4 + length;<\/p>\n
\/\/ 4\u3001\u53e3\u888b\u80fd\u4e0d\u80fd\u88c5\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if(buffer.length() >= totalLen){
\n \/\/ \u591f\u4e86，\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0,totalLen);<\/p>\n
\/\/ \u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n
\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305<\/p>\n
cout << "\u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f：" << endl;
\n unpack(packet);
\n }else
\n {
\n \/\/ \u89e3\u51b3\u534a\u5305
\n \/\/ \u4e0d\u591f,\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e" << endl;
\n break;
\n }
\n }
\n}<\/p>\n
\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid on(string data){
\n cout << "\u6536\u5230\u6570\u636e：" << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/\u5c1d\u8bd5\u5904\u7406
\n}<\/p>\n
int main()
\n{
\n \/\/ \u7c98\u5305\u548c\u8d34\u5305
\n string packet1 = pack(1, "1001", "hello");
\n string packet2 = pack(1, "1002", "ok");<\/p>\n
cout << "\u573a\u666f\u4e00：\u6b63\u5e38\u5904\u7406" << endl;
\n on(packet1);<\/p>\n
cout << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1 + packet2);<\/p>\n
cout << endl << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1.substr(0,10));
\n on(packet1.substr(10));<\/p>\n
return 0;
\n} <\/p>\n
<\/p>\n
\u603b\u7ed3：\u4e09\u53e5\u8bdd\u518d\u6b21\u6df1\u523b\u7406\u89e3LV\u534f\u8bae<\/p>\n
- \n
\u6253\u5305：Length + MType + IDLength + MID + Body，\u7528 + \u62fc\u8d77\u6765\u3002<\/p>\n<\/li>\n
- \n
\u62c6\u5305：\u5148\u8bfb\u524d 4 \u4e2a\u5b57\u7b26\u62ff\u5230 Length，\u5c31\u77e5\u9053\u540e\u9762\u8fd8\u6709\u591a\u5c11\u5b57\u7b26\u3002<\/p>\n<\/li>\n
- \n
\u5904\u7406\u7c98\u5305\/\u534a\u5305：\u6570\u636e\u5148\u4e22\u8fdb buffer，\u5faa\u73af\u68c0\u67e5 buffer \u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305（4 + Length），\u591f\u4e86\u5c31\u5207\u51fa\u6765，\u4e0d\u591f\u5c31\u7b49<\/p>\n<\/li>\n
\u6838\u5fc3\u516c\u5f0f：<\/p>\n
\u5b8c\u6574\u5305\u957f\u5ea6 = 4 + Length<\/p>\n","protected":false},"excerpt":{"rendered":"
\u76ee\u5f55
\n\u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305）
\n\u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784）
\n1. Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n4<\/p>\n","protected":false},"author":2,"featured_media":112483,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,43,78],"topic":[],"class_list":["post-112487","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-43","tag-78"],"yoast_head":"\n
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Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 4\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/112487.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-03T12:25:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122459-6ac0f41b5ce25.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/112487.html\",\"name\":\"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-10-03T12:25:02+00:00\",\"dateModified\":\"2026-10-03T12:25:02+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/112487.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/112487.html","og_locale":"zh_CN","og_type":"article","og_title":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u76ee\u5f55 \u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305） \u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784） 1. Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 4","og_url":"https:\/\/www.wsisp.com\/helps\/112487.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-10-03T12:25:02+00:00","og_image":[{"url":"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122459-6ac0f41b5ce25.png"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"6 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/112487.html","url":"https:\/\/www.wsisp.com\/helps\/112487.html","name":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-10-03T12:25:02+00:00","dateModified":"2026-10-03T12:25:02+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/112487.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/112487","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=112487"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/112487\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media\/112483"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=112487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=112487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=112487"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=112487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u201c\u5feb\u9012\u5355\u53f7\u201d\u3002<\/p>\n<\/li>\n
\u4f5c\u7528：\u7528\u6765\u552f\u4e00\u6807\u8bc6\u8fd9\u4e00\u4e2a\u5305\u88f9\u3002\u6bd4\u5982\u4f60\u53d1\u4e863\u4e2a\u8bf7\u6c42\u7ed9\u670d\u52a1\u5668，\u670d\u52a1\u5668\u56de\u4e863\u4e2a\u54cd\u5e94，\u4f60\u600e\u4e48\u77e5\u9053\u54ea\u4e2a\u54cd\u5e94\u5bf9\u5e94\u54ea\u4e2a\u8bf7\u6c42？\u5c31\u662f\u9760\u8fd9\u4e2aMID\u6765\u5339\u914d\u7684\u3002<\/p>\n<\/li>\n
\u957f\u5ea6：\u7531\u524d\u9762\u7684 IDLength \u51b3\u5b9a\u3002\u6bd4\u5982 IDLength=8，\u90a3\u8fd9\u91cc\u5c31\u53608\u4e2a\u5b57\u8282\u3002<\/p>\n<\/li>\n<\/ul>\n
5. Body（\u6d88\u606f\u4f53）\u2014\u2014 \u957f\u5ea6\u53ef\u53d8<\/h5>\n\n- \n
\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u201c\u5305\u88f9\u91cc\u771f\u6b63\u88c5\u7684\u4e1c\u897f\u201d\u3002<\/p>\n<\/li>\n
- \n
\u4f5c\u7528：\u4e5f\u5c31\u662f\u5b9e\u9645\u8981\u4f20\u8f93\u7684\u4e1a\u52a1\u6570\u636e\u3002\u6bd4\u5982\u4f60\u8c03\u7528\u4e00\u4e2a\u201c\u8ba1\u7b97\u52a0\u6cd5\u201d\u7684\u51fd\u6570，Body\u91cc\u5c31\u88c5\u7740 1+1 \u8fd9\u4e2a\u53c2\u6570\u3002<\/p>\n<\/li>\n
- \n
\u957f\u5ea6：\u5b83\u7684\u957f\u5ea6 = \u603b\u957f\u5ea6（Length） – \u9762\u5355\u4e0a\u5176\u4ed6\u6240\u6709\u5b57\u6bb5\u7684\u957f\u5ea6<\/p>\n<\/li>\n<\/ul>\n
\u5b9e\u6218\u6f14\u7ec3 \u2014\u2014 \u63a5\u6536\u65b9\u5982\u4f55\u62c6\u5305\u88f9？<\/h2>\n
\u5047\u8bbe\u4f60\u662f\u4e00\u4e2a\u63a5\u6536\u65b9，\u6536\u5230\u4e86\u8fd9\u4e32\u6570\u636e，\u4f60\u8be5\u600e\u4e48\u89e3\u6790？<\/p>\n
- \n
\u5148\u8bfb\u524d4\u4e2a\u5b57\u8282（Length）：\u4f60\u4e00\u770b，\u503c\u662f 100\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u603b\u5171\u6709100\u4e2a\u5b57\u8282\u3002\u540e\u9762\u8fd8\u670996\u4e2a\u5b57\u8282（\u56e0\u4e3a\u6211\u5df2\u7ecf\u8bfb\u4e864\u4e2a\u4e86）\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb4\u4e2a\u5b57\u8282（MType）：\u4f60\u4e00\u770b，\u503c\u662f 1\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u54e6，\u8fd9\u662f\u4e00\u4e2aRPC\u8bf7\u6c42，\u6211\u5f97\u51c6\u5907\u53bb\u5904\u7406\u4e1a\u52a1\u903b\u8f91\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u518d\u8bfb4\u4e2a\u5b57\u8282（IDLength）：\u4f60\u4e00\u770b，\u503c\u662f 8\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u7684\u5355\u53f7\u67098\u4e2a\u5b57\u8282\u957f\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb8\u4e2a\u5b57\u8282（MID）：\u4f60\u8bfb\u5230\u4e86\u5177\u4f53\u7684\u5355\u53f7，\u6bd4\u5982 10086\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8bb0\u4f4f\u8fd9\u4e2a\u5355\u53f7，\u7b49\u4e0b\u56de\u590d\u7684\u65f6\u5019\u8981\u5e26\u4e0a\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u6700\u540e\u8bfb\u5269\u4e0b\u7684\u6240\u6709\u5b57\u8282（Body）：\u7b97\u4e00\u4e0b，\u603b\u5171100\u5b57\u8282，\u6211\u5df2\u7ecf\u7528\u4e86 4+4+4+8=20 \u5b57\u8282，\u8fd8\u5269 80 \u5b57\u8282\u3002\u4f60\u5c31\u628a\u8fd980\u4e2a\u5b57\u8282\u5168\u8bfb\u51fa\u6765\u3002<\/p>\n
\n- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8fd9\u5c31\u662f\u771f\u6b63\u7684\u6570\u636e\u5185\u5bb9\u4e86\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
\u5b8c\u7f8e！ \u4f60\u6210\u529f\u5730\u4ece\u8fde\u7eed\u4e0d\u65ad\u7684\u7f51\u7edc\u6570\u636e\u6d41\u4e2d，\u7cbe\u51c6\u5730\u5207\u5206\u51fa\u4e86\u5b8c\u6574\u7684\u4e00\u6761\u6d88\u606f<\/p>\n
\u4ee3\u7801\u5b9e\u6218 \u2014\u2014 \u600e\u4e48\u6253\u5305，\u600e\u4e48\u62c6\u5305？<\/h2>\n\u7b2c\u4e00\u6b65：\u660e\u786e\u56fe\u7247\u91cc\u7684\u534f\u8bae\u7ed3\u6784<\/h4>\n
\u6839\u636e\u56fe\u7247，\u6211\u4eec\u7684\u6570\u636e\u5305\u957f\u8fd9\u6837：<\/p>\n
[Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f] <\/p>\n
\n- \n
Length：\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MType：\u6d88\u606f\u7c7b\u578b（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
IDLength：MID \u7684\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MID：\u6d88\u606f ID（\u957f\u5ea6\u7531 IDLength \u51b3\u5b9a）<\/p>\n<\/li>\n
- \n
Body：\u6b63\u6587（\u5269\u4e0b\u7684\u90fd\u662f\u5b83）<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e8c\u6b65：\u53d1\u9001\u65b9\u6253\u5305（\u62fc\u5b57\u7b26\u4e32）<\/h4>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570：\u628a\u6570\u5b57\u53d8\u6210 4 \u4f4d\u5b57\u7b26\u4e32\u3002\u6bd4\u5982 5 \u53d8\u6210 "0005"
\nstring to4(int num) {
\n string s = to_string(num);
\n while (s.length() < 4) s = "0" + s;
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body) {
\n \/\/ 1. \u7b97 IDLength（MID \u7684\u957f\u5ea6）
\n int idLen = mid.length();<\/p>\n
\/\/ 2. \u7b97 Length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n \/\/ \u540e\u9762\u6709：MType(4) + IDLength(4) + MID(idLen) + Body(body.length())
\n int length = 4 + 4 + idLen + body.length();<\/p>\n
\/\/ 3. \u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305！）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
int main() {
\n \/\/ \u53d1\u9001\u4e00\u6761\u6d88\u606f：\u7c7b\u578b1，ID\u662f"1001"，\u6b63\u6587\u662f"Hello"
\n string packet = pack(1, "1001", "Hello");
\n cout << "\u6253\u5305\u7ed3\u679c: " << packet << endl;
\n return 0;
\n} <\/p>\n
\u8fd0\u884c\u7ed3\u679c：<\/p>\n
<\/p>\n
\u6211\u4eec\u6765\u62c6\u89e3\u4e00\u4e0b\u8fd9\u4e2a\u7ed3\u679c：<\/p>\n
\n- \n
0017 \u2192 Length（\u540e\u9762\u603b\u5171 17 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
0001 \u2192 MType（\u7c7b\u578b 1）<\/p>\n<\/li>\n
- \n
0004 \u2192 IDLength（MID \u6709 4 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
1001 \u2192 MID<\/p>\n<\/li>\n
- \n
Hello \u2192 Body<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e09\u6b65：\u63a5\u6536\u65b9\u62c6\u5305（\u5207\u5b57\u7b26\u4e32）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n
\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n
#include <iostream>
\n#include <string><\/p>\n
using namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n
\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n
\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
void unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n
\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n
\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n
\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n
\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n
\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\n
int main()
\n{
\n \/\/ 1\u3001\u53d1\u9001\u65b9\u6253\u5305
\n string packet = pack(1, "1001", "hello");
\n cout << "\u6253\u5305\u7ed3\u679c：" << packet << endl;<\/p>\n
\/\/ 2\u3001\u89e3\u5305
\n unpack(packet);<\/p>\n
return 0;
\n} <\/p>\n
\u8fd0\u884c\u7ed3\u679c：<\/p>\n
<\/p>\n
\u7b2c\u56db\u6b65：\u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305（\u6838\u5fc3\u4e2d\u7684\u6838\u5fc3）<\/h4>\n
\u73b0\u5b9e\u4e2d，\u7f51\u7edc\u4e0d\u4f1a\u4e56\u4e56\u5730\u4e00\u6761\u4e00\u6761\u53d1\u3002\u6211\u4eec\u7528\u4e00\u4e2a\u5927\u53e3\u888b（buffer）\u6765\u88c5\u6570\u636e\u3002<\/p>\n
string buffer = ""; \/\/ \u5927\u53e3\u888b<\/p>\n
\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer() {
\n while (true) {
\n \/\/ 1. \u53e3\u888b\u91cc\u8fde 4 \u4e2a\u5b57\u7b26（Length）\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21\u5427
\n if (buffer.length() < 4) break;<\/p>\n
\/\/ 2. \u5077\u770b\u524d 4 \u4e2a\u5b57\u7b26，\u7b97\u51fa\u6574\u4e2a\u5305\u5e94\u8be5\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0, 4));<\/p>\n
\/\/ 3. \u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6 = 4（Length\u81ea\u5df1） + length（\u540e\u9762\u7684\u4e1c\u897f）
\n int totalLen = 4 + length;<\/p>\n
\/\/ 4. \u53e3\u888b\u91cc\u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if (buffer.length() >= totalLen) {
\n \/\/ \u591f\u4e86！\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0, totalLen);<\/p>\n
\/\/ \u4ece\u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n
\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305（\u7528\u4e0a\u9762\u7684 unpack \u903b\u8f91）
\n cout << "\u2705 \u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f: " << packet << endl;
\n } else {
\n \/\/ \u4e0d\u591f！\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u23f3 \u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e…" << endl;
\n break;
\n }
\n }
\n}<\/p>\n
\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid onDataReceived(string data) {
\n cout << "📩 \u6536\u5230\u6570\u636e: " << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/ \u5c1d\u8bd5\u5904\u7406
\n} <\/p>\n
\u7b2c\u4e94\u6b65：\u5b8c\u6574\u6d4b\u8bd5（\u628a\u524d\u9762\u7684 pack \u548c unpack \u90fd\u62fc\u8d77\u6765）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n
\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n
#include <iostream>
\n#include <string><\/p>\n
using namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n
\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n
\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n
\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\n
return packet;
\n}<\/p>\n
void unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n
\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n
\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n
\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n
\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n
\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\n
\/\/ \u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305
\nstring buffer = "";<\/p>\n
\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer(){
\n while(true){
\n \/\/ 1\u3001\u53e3\u888b\u91cc4\u4e2a\u5b57\u6bb5\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21
\n if(buffer.length() < 4) break;<\/p>\n
\/\/ 2\u3001\u5077\u770b\u4e00\u4e0b4\u4e2a\u5b57\u7b26，\u7b97\u51fa\u8fd9\u4e2a\u5305\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0,4));<\/p>\n
\/\/ 3\u3001\u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6
\n int totalLen = 4 + length;<\/p>\n
\/\/ 4\u3001\u53e3\u888b\u80fd\u4e0d\u80fd\u88c5\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if(buffer.length() >= totalLen){
\n \/\/ \u591f\u4e86，\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0,totalLen);<\/p>\n
\/\/ \u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n
\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305<\/p>\n
cout << "\u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f：" << endl;
\n unpack(packet);
\n }else
\n {
\n \/\/ \u89e3\u51b3\u534a\u5305
\n \/\/ \u4e0d\u591f,\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e" << endl;
\n break;
\n }
\n }
\n}<\/p>\n
\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid on(string data){
\n cout << "\u6536\u5230\u6570\u636e：" << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/\u5c1d\u8bd5\u5904\u7406
\n}<\/p>\n
int main()
\n{
\n \/\/ \u7c98\u5305\u548c\u8d34\u5305
\n string packet1 = pack(1, "1001", "hello");
\n string packet2 = pack(1, "1002", "ok");<\/p>\n
cout << "\u573a\u666f\u4e00：\u6b63\u5e38\u5904\u7406" << endl;
\n on(packet1);<\/p>\n
cout << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1 + packet2);<\/p>\n
cout << endl << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1.substr(0,10));
\n on(packet1.substr(10));<\/p>\n
return 0;
\n} <\/p>\n
<\/p>\n
\u603b\u7ed3：\u4e09\u53e5\u8bdd\u518d\u6b21\u6df1\u523b\u7406\u89e3LV\u534f\u8bae<\/p>\n
- \n
\u6253\u5305：Length + MType + IDLength + MID + Body，\u7528 + \u62fc\u8d77\u6765\u3002<\/p>\n<\/li>\n
- \n
\u62c6\u5305：\u5148\u8bfb\u524d 4 \u4e2a\u5b57\u7b26\u62ff\u5230 Length，\u5c31\u77e5\u9053\u540e\u9762\u8fd8\u6709\u591a\u5c11\u5b57\u7b26\u3002<\/p>\n<\/li>\n
- \n
\u5904\u7406\u7c98\u5305\/\u534a\u5305：\u6570\u636e\u5148\u4e22\u8fdb buffer，\u5faa\u73af\u68c0\u67e5 buffer \u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305（4 + Length），\u591f\u4e86\u5c31\u5207\u51fa\u6765，\u4e0d\u591f\u5c31\u7b49<\/p>\n<\/li>\n
\u6838\u5fc3\u516c\u5f0f：<\/p>\n
\u5b8c\u6574\u5305\u957f\u5ea6 = 4 + Length<\/p>\n","protected":false},"excerpt":{"rendered":"
\u76ee\u5f55
\n\u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305）
\n\u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784）
\n1. Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n4<\/p>\n","protected":false},"author":2,"featured_media":112483,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,43,78],"topic":[],"class_list":["post-112487","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-43","tag-78"],"yoast_head":"\n
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Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a） 4\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/112487.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-03T12:25:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261003122459-6ac0f41b5ce25.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/112487.html\",\"name\":\"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-10-03T12:25:02+00:00\",\"dateModified\":\"2026-10-03T12:25:02+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/112487.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/112487.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/112487.html","og_locale":"zh_CN","og_type":"article","og_title":"\u62d2\u7edd\u7c98\u5305\uff01\u57fa\u4e8e C++ \u624b\u628a\u624b\u5e26\u4f60\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49 LV \u534f\u8bae - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u76ee\u5f55 \u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305） \u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784） 1. 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\u8fd9\u662f\u4ec0\u4e48：\u8fd9\u662f\u201c\u5305\u88f9\u91cc\u771f\u6b63\u88c5\u7684\u4e1c\u897f\u201d\u3002<\/p>\n<\/li>\n
\u4f5c\u7528：\u4e5f\u5c31\u662f\u5b9e\u9645\u8981\u4f20\u8f93\u7684\u4e1a\u52a1\u6570\u636e\u3002\u6bd4\u5982\u4f60\u8c03\u7528\u4e00\u4e2a\u201c\u8ba1\u7b97\u52a0\u6cd5\u201d\u7684\u51fd\u6570，Body\u91cc\u5c31\u88c5\u7740 1+1 \u8fd9\u4e2a\u53c2\u6570\u3002<\/p>\n<\/li>\n
\u957f\u5ea6：\u5b83\u7684\u957f\u5ea6 = \u603b\u957f\u5ea6（Length） – \u9762\u5355\u4e0a\u5176\u4ed6\u6240\u6709\u5b57\u6bb5\u7684\u957f\u5ea6<\/p>\n<\/li>\n<\/ul>\n
\u5b9e\u6218\u6f14\u7ec3 \u2014\u2014 \u63a5\u6536\u65b9\u5982\u4f55\u62c6\u5305\u88f9？<\/h2>\n
\u5047\u8bbe\u4f60\u662f\u4e00\u4e2a\u63a5\u6536\u65b9，\u6536\u5230\u4e86\u8fd9\u4e32\u6570\u636e，\u4f60\u8be5\u600e\u4e48\u89e3\u6790？<\/p>\n
\u5148\u8bfb\u524d4\u4e2a\u5b57\u8282（Length）：\u4f60\u4e00\u770b，\u503c\u662f 100\u3002<\/p>\n
- \n
- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u603b\u5171\u6709100\u4e2a\u5b57\u8282\u3002\u540e\u9762\u8fd8\u670996\u4e2a\u5b57\u8282（\u56e0\u4e3a\u6211\u5df2\u7ecf\u8bfb\u4e864\u4e2a\u4e86）\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb4\u4e2a\u5b57\u8282（MType）：\u4f60\u4e00\u770b，\u503c\u662f 1\u3002<\/p>\n
- \n
- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u54e6，\u8fd9\u662f\u4e00\u4e2aRPC\u8bf7\u6c42，\u6211\u5f97\u51c6\u5907\u53bb\u5904\u7406\u4e1a\u52a1\u903b\u8f91\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u518d\u8bfb4\u4e2a\u5b57\u8282（IDLength）：\u4f60\u4e00\u770b，\u503c\u662f 8\u3002<\/p>\n
- \n
- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u597d\u7684，\u8fd9\u4e2a\u5305\u88f9\u7684\u5355\u53f7\u67098\u4e2a\u5b57\u8282\u957f\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u63a5\u7740\u8bfb8\u4e2a\u5b57\u8282（MID）：\u4f60\u8bfb\u5230\u4e86\u5177\u4f53\u7684\u5355\u53f7，\u6bd4\u5982 10086\u3002<\/p>\n
- \n
- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8bb0\u4f4f\u8fd9\u4e2a\u5355\u53f7，\u7b49\u4e0b\u56de\u590d\u7684\u65f6\u5019\u8981\u5e26\u4e0a\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
- \n
\u6700\u540e\u8bfb\u5269\u4e0b\u7684\u6240\u6709\u5b57\u8282（Body）：\u7b97\u4e00\u4e0b，\u603b\u5171100\u5b57\u8282，\u6211\u5df2\u7ecf\u7528\u4e86 4+4+4+8=20 \u5b57\u8282，\u8fd8\u5269 80 \u5b57\u8282\u3002\u4f60\u5c31\u628a\u8fd980\u4e2a\u5b57\u8282\u5168\u8bfb\u51fa\u6765\u3002<\/p>\n
- \n
- \n
\u4f60\u7684\u5fc3\u91cc\u6d3b\u52a8：\u8fd9\u5c31\u662f\u771f\u6b63\u7684\u6570\u636e\u5185\u5bb9\u4e86\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n
\u5b8c\u7f8e！ \u4f60\u6210\u529f\u5730\u4ece\u8fde\u7eed\u4e0d\u65ad\u7684\u7f51\u7edc\u6570\u636e\u6d41\u4e2d，\u7cbe\u51c6\u5730\u5207\u5206\u51fa\u4e86\u5b8c\u6574\u7684\u4e00\u6761\u6d88\u606f<\/p>\n
\u4ee3\u7801\u5b9e\u6218 \u2014\u2014 \u600e\u4e48\u6253\u5305，\u600e\u4e48\u62c6\u5305？<\/h2>\n
\u7b2c\u4e00\u6b65：\u660e\u786e\u56fe\u7247\u91cc\u7684\u534f\u8bae\u7ed3\u6784<\/h4>\n
\u6839\u636e\u56fe\u7247，\u6211\u4eec\u7684\u6570\u636e\u5305\u957f\u8fd9\u6837：<\/p>\n
[Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f] <\/p>\n
- \n
- \n
Length：\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MType：\u6d88\u606f\u7c7b\u578b（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
IDLength：MID \u7684\u957f\u5ea6（\u56fa\u5b9a 4 \u5b57\u7b26）<\/p>\n<\/li>\n
- \n
MID：\u6d88\u606f ID（\u957f\u5ea6\u7531 IDLength \u51b3\u5b9a）<\/p>\n<\/li>\n
- \n
Body：\u6b63\u6587（\u5269\u4e0b\u7684\u90fd\u662f\u5b83）<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e8c\u6b65：\u53d1\u9001\u65b9\u6253\u5305（\u62fc\u5b57\u7b26\u4e32）<\/h4>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\n\/\/ \u8f85\u52a9\u51fd\u6570：\u628a\u6570\u5b57\u53d8\u6210 4 \u4f4d\u5b57\u7b26\u4e32\u3002\u6bd4\u5982 5 \u53d8\u6210 "0005"
\nstring to4(int num) {
\n string s = to_string(num);
\n while (s.length() < 4) s = "0" + s;
\n return s;
\n}<\/p>\n\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body) {
\n \/\/ 1. \u7b97 IDLength（MID \u7684\u957f\u5ea6）
\n int idLen = mid.length();<\/p>\n\/\/ 2. \u7b97 Length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n \/\/ \u540e\u9762\u6709：MType(4) + IDLength(4) + MID(idLen) + Body(body.length())
\n int length = 4 + 4 + idLen + body.length();<\/p>\n\/\/ 3. \u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305！）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\nreturn packet;
\n}<\/p>\nint main() {
\n \/\/ \u53d1\u9001\u4e00\u6761\u6d88\u606f：\u7c7b\u578b1，ID\u662f"1001"，\u6b63\u6587\u662f"Hello"
\n string packet = pack(1, "1001", "Hello");
\n cout << "\u6253\u5305\u7ed3\u679c: " << packet << endl;
\n return 0;
\n} <\/p>\n\u8fd0\u884c\u7ed3\u679c：<\/p>\n
<\/p>\n\u6211\u4eec\u6765\u62c6\u89e3\u4e00\u4e0b\u8fd9\u4e2a\u7ed3\u679c：<\/p>\n
- \n
- \n
0017 \u2192 Length（\u540e\u9762\u603b\u5171 17 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
0001 \u2192 MType（\u7c7b\u578b 1）<\/p>\n<\/li>\n
- \n
0004 \u2192 IDLength（MID \u6709 4 \u4e2a\u5b57\u7b26）<\/p>\n<\/li>\n
- \n
1001 \u2192 MID<\/p>\n<\/li>\n
- \n
Hello \u2192 Body<\/p>\n<\/li>\n<\/ul>\n
\u7b2c\u4e09\u6b65：\u63a5\u6536\u65b9\u62c6\u5305（\u5207\u5b57\u7b26\u4e32）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n#include <iostream>
\n#include <string><\/p>\nusing namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\nreturn packet;
\n}<\/p>\nvoid unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\nint main()
\n{
\n \/\/ 1\u3001\u53d1\u9001\u65b9\u6253\u5305
\n string packet = pack(1, "1001", "hello");
\n cout << "\u6253\u5305\u7ed3\u679c：" << packet << endl;<\/p>\n\/\/ 2\u3001\u89e3\u5305
\n unpack(packet);<\/p>\nreturn 0;
\n} <\/p>\n\u8fd0\u884c\u7ed3\u679c：<\/p>\n
<\/p>\n\u7b2c\u56db\u6b65：\u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305（\u6838\u5fc3\u4e2d\u7684\u6838\u5fc3）<\/h4>\n
\u73b0\u5b9e\u4e2d，\u7f51\u7edc\u4e0d\u4f1a\u4e56\u4e56\u5730\u4e00\u6761\u4e00\u6761\u53d1\u3002\u6211\u4eec\u7528\u4e00\u4e2a\u5927\u53e3\u888b（buffer）\u6765\u88c5\u6570\u636e\u3002<\/p>\n
string buffer = ""; \/\/ \u5927\u53e3\u888b<\/p>\n
\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer() {
\n while (true) {
\n \/\/ 1. \u53e3\u888b\u91cc\u8fde 4 \u4e2a\u5b57\u7b26（Length）\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21\u5427
\n if (buffer.length() < 4) break;<\/p>\n\/\/ 2. \u5077\u770b\u524d 4 \u4e2a\u5b57\u7b26，\u7b97\u51fa\u6574\u4e2a\u5305\u5e94\u8be5\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0, 4));<\/p>\n\/\/ 3. \u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6 = 4（Length\u81ea\u5df1） + length（\u540e\u9762\u7684\u4e1c\u897f）
\n int totalLen = 4 + length;<\/p>\n\/\/ 4. \u53e3\u888b\u91cc\u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if (buffer.length() >= totalLen) {
\n \/\/ \u591f\u4e86！\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0, totalLen);<\/p>\n\/\/ \u4ece\u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305（\u7528\u4e0a\u9762\u7684 unpack \u903b\u8f91）
\n cout << "\u2705 \u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f: " << packet << endl;
\n } else {
\n \/\/ \u4e0d\u591f！\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u23f3 \u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e…" << endl;
\n break;
\n }
\n }
\n}<\/p>\n\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid onDataReceived(string data) {
\n cout << "📩 \u6536\u5230\u6570\u636e: " << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/ \u5c1d\u8bd5\u5904\u7406
\n} <\/p>\n\u7b2c\u4e94\u6b65：\u5b8c\u6574\u6d4b\u8bd5（\u628a\u524d\u9762\u7684 pack \u548c unpack \u90fd\u62fc\u8d77\u6765）<\/h4>\n
\/*
\n \u6a21\u62dfLv\u534f\u8bae
\n \u6253\u5305，\u62c6\u5305
\n*\/<\/p>\n\/*
\n \u6570\u636e\u5305\u957f\u8fd9\u6837\u5b50
\n [Length 4\u5b57\u7b26][MType 4\u5b57\u7b26][IDLength 4\u5b57\u7b26][MID \u53d8\u957f][Body \u53d8\u957f]
\n*\/<\/p>\n#include <iostream>
\n#include <string><\/p>\nusing namespace std;<\/p>\n
\/\/ \u8f85\u52a9\u51fd\u6570，\u628a\u6570\u5b57\u8f6c\u5316\u4e3a4\u4e3a\u5b57\u7b26\u4e32，4\u8f6c\u4e3a\u5b57\u7b26\u4e320004
\nstring to4(int num){
\n \/\/ \u8f6c\u6362\u5b57\u7b26\u4e32
\n string s = to_string(num);
\n while(s.length() < 4){
\n \/\/ \u5de6\u8fb9\u88650
\n s = "0" + s;
\n }
\n return s;
\n}<\/p>\n\/\/ \u6253\u5305\u51fd\u6570
\nstring pack(int mtype, string mid, string body){
\n \/\/ 1\u3001\u7b97IDLength\u957f\u5ea6(MID \u7684\u957f\u5ea6)
\n int idLen = mid.size();<\/p>\n\/\/ 2\u3001\u7b97length（\u540e\u9762\u6240\u6709\u4e1c\u897f\u7684\u603b\u957f\u5ea6）
\n int length = 4 + 4 + idLen + body.size();<\/p>\n\/\/ 3\u3001\u6309\u987a\u5e8f\u62fc\u63a5（\u8fd9\u5c31\u662f\u6253\u5305）
\n string packet = to4(length) + to4(mtype) + to4(idLen) + mid + body;<\/p>\nreturn packet;
\n}<\/p>\nvoid unpack(string packet){
\n \/\/ 1\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLength
\n string lenStr = packet.substr(0,4);
\n int length = stoi(lenStr);<\/p>\n\/\/ 2\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fMType
\n string mtypeStr = packet.substr(4,4);
\n int mtype = stoi(mtypeStr);<\/p>\n\/\/ 3\u3001\u5207\u9664\u524d4\u4e2a\u5b57\u7b26，\u8fd9\u662fLDLength
\n string idLenStr = packet.substr(8,4);
\n int idLen = stoi(idLenStr);<\/p>\n\/\/ 4\u3001\u4ece12\u4e2a\u5b57\u7b26\u5f00\u59cb，\u5207idLen\u4e2a\u5b57\u7b26，\u8fd9\u662fMID
\n string mid = packet.substr(12,idLen);<\/p>\n\/\/ 5. \u5269\u4e0b\u7684\u5168\u662f Body
\n string body = packet.substr(12 + idLen);<\/p>\n\/\/ \u6253\u5370\u7ed3\u679c
\n cout << "\u89e3\u6790\u7ed3\u679c：" << endl;
\n cout << " Length = " << length << endl;
\n cout << " MType = " << mtype << endl;
\n cout << " IDLength = " << idLen << endl;
\n cout << " MID = " << mid << endl;
\n cout << " Body = " << body << endl;
\n}<\/p>\n\/\/ \u89e3\u51b3\u7c98\u5305\u548c\u534a\u5305
\nstring buffer = "";<\/p>\n\/\/ \u5904\u7406\u53e3\u888b\u91cc\u7684\u6570\u636e
\nvoid processBuffer(){
\n while(true){
\n \/\/ 1\u3001\u53e3\u888b\u91cc4\u4e2a\u5b57\u6bb5\u90fd\u4e0d\u591f，\u7b49\u4e0b\u6b21
\n if(buffer.length() < 4) break;<\/p>\n\/\/ 2\u3001\u5077\u770b\u4e00\u4e0b4\u4e2a\u5b57\u7b26，\u7b97\u51fa\u8fd9\u4e2a\u5305\u6709\u591a\u957f
\n int length = stoi(buffer.substr(0,4));<\/p>\n\/\/ 3\u3001\u6574\u4e2a\u5305\u7684\u5b9e\u9645\u603b\u957f\u5ea6
\n int totalLen = 4 + length;<\/p>\n\/\/ 4\u3001\u53e3\u888b\u80fd\u4e0d\u80fd\u88c5\u4e00\u4e2a\u5b8c\u6574\u7684\u5305？
\n if(buffer.length() >= totalLen){
\n \/\/ \u591f\u4e86，\u5207\u51fa\u5b8c\u6574\u7684\u5305
\n string packet = buffer.substr(0,totalLen);<\/p>\n\/\/ \u53e3\u888b\u91cc\u5220\u6389\u5df2\u7ecf\u5904\u7406\u7684\u90e8\u5206
\n buffer.erase(0, totalLen);<\/p>\n\/\/ \u89e3\u6790\u8fd9\u4e2a\u5305<\/p>\n
cout << "\u89e3\u6790\u51fa\u4e00\u6761\u5b8c\u6574\u6d88\u606f：" << endl;
\n unpack(packet);
\n }else
\n {
\n \/\/ \u89e3\u51b3\u534a\u5305
\n \/\/ \u4e0d\u591f,\u534a\u5305，\u7b49\u4e0b\u6b21\u6570\u636e\u6765
\n cout << "\u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u66f4\u591a\u6570\u636e" << endl;
\n break;
\n }
\n }
\n}<\/p>\n\/\/ \u6a21\u62df\u7f51\u7edc\u6570\u636e\u5230\u8fbe
\nvoid on(string data){
\n cout << "\u6536\u5230\u6570\u636e：" << data << endl;
\n buffer += data; \/\/ \u4e22\u8fdb\u53e3\u888b
\n processBuffer(); \/\/\u5c1d\u8bd5\u5904\u7406
\n}<\/p>\nint main()
\n{
\n \/\/ \u7c98\u5305\u548c\u8d34\u5305
\n string packet1 = pack(1, "1001", "hello");
\n string packet2 = pack(1, "1002", "ok");<\/p>\ncout << "\u573a\u666f\u4e00：\u6b63\u5e38\u5904\u7406" << endl;
\n on(packet1);<\/p>\ncout << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1 + packet2);<\/p>\ncout << endl << "\u573a\u666f\u4e8c：\u7c98\u5305（\u4e00\u8d77\u53d1）" << endl;
\n on(packet1.substr(0,10));
\n on(packet1.substr(10));<\/p>\nreturn 0;
\n} <\/p>\n<\/p>\n\u603b\u7ed3：\u4e09\u53e5\u8bdd\u518d\u6b21\u6df1\u523b\u7406\u89e3LV\u534f\u8bae<\/p>\n
- \n
\u6253\u5305：Length + MType + IDLength + MID + Body，\u7528 + \u62fc\u8d77\u6765\u3002<\/p>\n<\/li>\n
- \n
\u62c6\u5305：\u5148\u8bfb\u524d 4 \u4e2a\u5b57\u7b26\u62ff\u5230 Length，\u5c31\u77e5\u9053\u540e\u9762\u8fd8\u6709\u591a\u5c11\u5b57\u7b26\u3002<\/p>\n<\/li>\n
- \n
\u5904\u7406\u7c98\u5305\/\u534a\u5305：\u6570\u636e\u5148\u4e22\u8fdb buffer，\u5faa\u73af\u68c0\u67e5 buffer \u591f\u4e0d\u591f\u4e00\u4e2a\u5b8c\u6574\u7684\u5305（4 + Length），\u591f\u4e86\u5c31\u5207\u51fa\u6765，\u4e0d\u591f\u5c31\u7b49<\/p>\n<\/li>\n
\u6838\u5fc3\u516c\u5f0f：<\/p>\n
\u5b8c\u6574\u5305\u957f\u5ea6 = 4 + Length<\/p>\n","protected":false},"excerpt":{"rendered":"
\u76ee\u5f55
\n\u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e2a\u534f\u8bae？（\u89e3\u51b3\u7c98\u5305）
\n\u62c6\u89e3\u201c\u5feb\u9012\u9762\u5355\u201d （\u534f\u8bae\u7ed3\u6784）
\n1. Length（\u603b\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n2. MType（\u6d88\u606f\u7c7b\u578b）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
\n3. IDLength（ID\u957f\u5ea6）\u2014\u2014 4\u5b57\u8282（\u56fa\u5b9a）
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