\n| \n Makefile<\/p>\n<\/td>\n | \n \u6784\u5efa\u811a\u672c<\/p>\n<\/td>\n | \n \u4e00\u952e\u6253\u5305\u673a，\u6572\u4e2a make \u5168\u641e\u5b9a<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u6570\u636e\u6d41\u52a8\u7684\u8def\u7ebf，\u8bb0\u4f4f\u8fd9\u4e00\u6761\u5c31\u591f\u4e86：<\/p>\n \u952e\u76d8\u8f93\u5165 \u2192 \u5ba2\u6237\u7aef sendto \u2192 \u7f51\u7edc \u2192 \u670d\u52a1\u5668 recvfrom
\n \u2192 \u56de\u8c03\u51fd\u6570\u67e5\u8bcd\u5178 \u2192 sendto \u56de\u5bc4 \u2192 \u5ba2\u6237\u7aef recvfrom \u2192 \u5c4f\u5e55\u663e\u793a<\/p>\n
\n\u4e8c\u3001\u7f51\u7edc\u901a\u4fe1\u6a21\u5757：\u8ba9\u4e24\u53f0\u673a\u5668\u8bf4\u4e0a\u8bdd<\/h3>\n2.1 \u670d\u52a1\u5668\u7684\u4e00\u751f：socket \u2192 bind \u2192 recvfrom \u2192 sendto<\/h4>\nUDP \u670d\u52a1\u5668\u7684\u6838\u5fc3\u5168\u5728 UdpServer.hpp \u91cc\u3002\u5b83\u7684\u751f\u547d\u5468\u671f\u7b80\u5355\u5f97\u79bb\u8c31，\u5c31\u5e72\u56db\u4ef6\u4e8b：\u5f00\u5f20（socket）\u3001\u79df\u95e8\u9762（bind）\u3001\u7b49\u5ba2\u4eba（recvfrom）\u3001\u56de\u8bdd（sendto）\u3002<\/span><\/span><\/p>\n
\n\u5148\u770b\u6784\u9020\u51fd\u6570\u548c\u7c7b\u578b\u5b9a\u4e49：<\/p>\n using func_t = std::function<std::string(const std::string&, InetAddr&)>;<\/p>\n class UdpServer
\n{
\npublic:
\n UdpServer(uint16_t port, func_t func)
\n : _sockfd(defaultfd),
\n _port(port),
\n _isrunning(false),
\n _func(func)
\n {
\n }<\/p>\n \u6ce8\u610f\u8fd9\u4e2a func_t，\u5b83\u662f\u6574\u4e2a\u8bbe\u8ba1\u91cc\u6700\u5999\u7684\u4e00\u7b14\u3002UdpServer \u6536\u5230\u6d88\u606f\u540e\u81ea\u5df1\u4e0d\u5904\u7406<\/span><\/span>，\u800c\u662f\u628a\u5b57\u7b26\u4e32\u4e22\u7ed9\u4e00\u4e2a\u5916\u90e8\u4f20\u8fdb\u6765\u7684\u51fd\u6570\u3002\u4eca\u5929\u8fd9\u4e2a\u51fd\u6570\u662f"\u67e5\u8bcd\u5178"，\u660e\u5929\u4f60\u6362\u6210"\u8ba1\u7b97\u5668""\u804a\u5929\u5ba4\u673a\u5668\u4eba"，\u670d\u52a1\u5668\u4ee3\u7801\u4e00\u884c\u90fd\u4e0d\u7528\u6539\u3002\u8fd9\u5c31\u662f\u56de\u8c03，\u4e0b\u9762\u8fd8\u4f1a\u7ec6\u8bb2\u3002<\/p>\n1. \u4ec0\u4e48\u662f\u56de\u8c03\u51fd\u6570？（\u751f\u6d3b\u6bd4\u55bb）<\/p>\n \u5047\u8bbe\u4f60\u8981\u53bb\u4e00\u5bb6\u9910\u5385\u5403\u996d：<\/p>\n \n\u540c\u6b65\u8c03\u7528（\u666e\u901a\u51fd\u6570）：\u4f60\u70b9\u5b8c\u83dc，\u5c31\u50bb\u7ad9\u5728\u53a8\u623f\u95e8\u53e3，\u4e00\u76f4\u7b49\u5230\u53a8\u5e08\u628a\u83dc\u505a\u597d\u9012\u7ed9\u4f60，\u4f60\u624d\u8d70\u3002\u8fd9\u671f\u95f4\u4f60\u4ec0\u4e48\u90fd\u5e72\u4e0d\u4e86\u3002<\/p>\n<\/li>\n \n\u56de\u8c03\u51fd\u6570：\u4f60\u70b9\u5b8c\u83dc，\u544a\u8bc9\u670d\u52a1\u5458：\u201c\u8fd9\u662f\u6211\u7684\u624b\u673a\u53f7（\u6ce8\u518c\u56de\u8c03），\u83dc\u505a\u597d\u4e86\u6253\u7ed9\u6211（\u89e6\u53d1\u56de\u8c03），\u987a\u4fbf\u544a\u8bc9\u6211\u83dc\u540d（\u53c2\u6570）\u3002\u201d \u7136\u540e\u4f60\u5c31\u56de\u5ea7\u4f4d\u73a9\u624b\u673a\u4e86（\u4e3b\u7a0b\u5e8f\u7ee7\u7eed\u6267\u884c）\u3002\u7b49\u53a8\u623f\u505a\u597d\u4e86，\u670d\u52a1\u5458\u901a\u8fc7\u4f60\u7684\u624b\u673a\u53f7\u627e\u5230\u4f60（\u6267\u884c\u56de\u8c03），\u628a\u83dc\u7aef\u7ed9\u4f60\u3002<\/p>\n<\/li>\n \u5728\u8fd9\u4e2a\u6bd4\u55bb\u91cc：<\/p>\n \n- \n
\u4f60\u7684\u624b\u673a\u53f7\u00a0= \u51fd\u6570\u6307\u9488\/\u56de\u8c03\u5bf9\u8c61<\/p>\n<\/li>\n - \n
\u53a8\u5e08\/\u670d\u52a1\u5458\u00a0= \u8c03\u7528\u8005<\/p>\n<\/li>\n - \n
\u83dc\u540d\u00a0= \u56de\u8c03\u51fd\u6570\u7684\u53c2\u6570<\/p>\n<\/li>\n<\/ul>\n \u5728 C++ \u91cc，\u56de\u8c03\u51fd\u6570\u5c31\u662f：\u628a\u4e00\u4e2a\u51fd\u6570（\u6216\u53ef\u8c03\u7528\u5bf9\u8c61）\u4f5c\u4e3a\u53c2\u6570\u4f20\u7ed9\u53e6\u4e00\u4e2a\u51fd\u6570，\u5f53\u6ee1\u8db3\u67d0\u4e2a\u6761\u4ef6（\u6bd4\u5982\u6536\u5230\u7f51\u7edc\u6570\u636e）\u65f6，\u7531\u90a3\u4e2a\u51fd\u6570\u6765\u8c03\u7528\u4f60\u4f20\u8fdb\u53bb\u7684\u51fd\u6570\u3002<\/p>\n
\n2. \u9010\u8bcd\u62c6\u89e3\u56fe\u4e2d\u7684\u8fd9\u884c\u4ee3\u7801<\/p>\n using func_t = std::function<std::string(const std::string&, InetAddr&)>;<\/p>\n \u8fd9\u884c\u4ee3\u7801\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7c7b\u578b\u522b\u540d，\u540d\u5b57\u53eb\u00a0func_t\u3002\u4ee5\u540e\u4f60\u60f3\u58f0\u660e\u8fd9\u79cd\u7c7b\u578b\u7684\u56de\u8c03\u51fd\u6570，\u76f4\u63a5\u5199\u00a0func_t my_callback;\u00a0\u5c31\u884c\u4e86\u3002<\/p>\n \u6211\u4eec\u6765\u770b\u7b49\u53f7\u53f3\u8fb9：<\/p>\n \n- \n
std::function：\u8fd9\u662f C++11 \u5f15\u5165\u7684\u201c\u4e07\u80fd\u51fd\u6570\u5bb9\u5668\u201d\u3002\u5b83\u53ef\u4ee5\u88c5\u4e0b\u666e\u901a\u51fd\u6570\u3001Lambda \u8868\u8fbe\u5f0f\u3001\u7c7b\u7684\u6210\u5458\u51fd\u6570\u3001\u4eff\u51fd\u6570\u7b49\u4efb\u4f55\u201c\u957f\u5f97\u50cf\u51fd\u6570\u201d\u7684\u4e1c\u897f\u3002\u5b83\u6bd4\u4f20\u7edf\u7684 C \u8bed\u8a00\u51fd\u6570\u6307\u9488\u5f3a\u5927\u5f97\u591a\u3002<\/p>\n<\/li>\n - \n
<std::string(…)>：\u5c16\u62ec\u53f7\u91cc\u63cf\u8ff0\u7684\u662f\u8fd9\u4e2a\u51fd\u6570\u7684\u7b7e\u540d（Signature）\u3002<\/p>\n \n- \n
\u7b2c\u4e00\u4e2a\u00a0std::string：\u8868\u793a\u88ab\u5305\u88c5\u7684\u51fd\u6570\u8fd4\u56de\u503c\u662f\u00a0std::string\u3002<\/p>\n<\/li>\n - \n
(const std::string&, InetAddr&)：\u8868\u793a\u88ab\u5305\u88c5\u7684\u51fd\u6570\u63a5\u6536\u4e24\u4e2a\u53c2\u6570\u3002\u7b2c\u4e00\u4e2a\u662f\u00a0const std::string&（\u53ea\u8bfb\u7684\u5b57\u7b26\u4e32），\u7b2c\u4e8c\u4e2a\u662f\u00a0InetAddr&（\u7f51\u7edc\u5730\u5740\u5bf9\u8c61\u7684\u5f15\u7528）\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n \u603b\u7ed3\u8fd9\u884c\u4ee3\u7801\u7684\u610f\u601d：
\nfunc_t\u00a0\u4ee3\u8868\u4e00\u79cd\u51fd\u6570\u7c7b\u578b，\u8fd9\u79cd\u51fd\u6570\u63a5\u6536\u4e00\u4e2a\u5b57\u7b26\u4e32\u548c\u4e00\u4e2a\u7f51\u7edc\u5730\u5740，\u5e76\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/p>\n
\n3. \u8fd9\u4e2a\u7c7b\u578b\u7684\u56de\u8c03\u5728\u9879\u76ee\u4e2d\u662f\u600e\u4e48\u7528\u7684？<\/p>\n \u7ed3\u5408\u4f60\u6b63\u5728\u505a\u7684\u201cUDP\u82f1\u8bd1\u6c49\u7f51\u7edc\u8bcd\u5178\u201d\u9879\u76ee，\u8fd9\u4e2a\u00a0func_t\u00a0\u7b80\u76f4\u5c31\u662f\u4e3a\u5b83\u91cf\u8eab\u5b9a\u505a\u7684\u3002<\/p>\n \u573a\u666f\u8bbe\u5b9a：
\n\u670d\u52a1\u5668\u6536\u5230\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u4e00\u4e2a\u82f1\u6587\u5355\u8bcd（std::string），\u4ee5\u53ca\u5ba2\u6237\u7aef\u7684\u5730\u5740（InetAddr）\u3002\u670d\u52a1\u5668\u9700\u8981\u8c03\u7528\u4e1a\u52a1\u903b\u8f91，\u628a\u8fd9\u4e2a\u8bcd\u7ffb\u8bd1\u6210\u4e2d\u6587（\u8fd4\u56de\u00a0std::string），\u7136\u540e\u518d\u628a\u8fd9\u4e2a\u4e2d\u6587\u53d1\u56de\u53bb\u3002<\/p>\n \u5178\u578b\u7684\u5b9e\u73b0\u6d41\u7a0b：<\/p>\n 1. \u5b9a\u4e49\u4e1a\u52a1\u903b\u8f91（\u5728\u00a0Dict.hpp\u00a0\u4e2d）：<\/p>\n class Dict {
\npublic:
\n \/\/ \u8fd9\u5c31\u662f\u4e00\u4e2a\u7b26\u5408 func_t \u7b7e\u540d\u7684\u51fd\u6570！
\n std::string Translate(const std::string& word, InetAddr& client_addr) {
\n \/\/ \u67e5\u8bcd\u5178，\u8fd4\u56de\u7ffb\u8bd1\u7ed3\u679c
\n return "\u82f9\u679c";
\n }
\n};<\/p>\n
\n2. \u6ce8\u518c\u56de\u8c03（\u5728\u00a0UdpServer\u00a0\u4e2d）：
\n\u4f60\u7684\u00a0UdpServer\u00a0\u7c7b\u91cc\u4f1a\u6709\u4e00\u4e2a\u00a0func_t _callback;\u00a0\u6210\u5458\u53d8\u91cf\u3002
\n\u5728\u00a0main\u00a0\u51fd\u6570\u91cc，\u4f60\u628a\u00a0Dict\u00a0\u5bf9\u8c61\u7684\u00a0Translate\u00a0\u65b9\u6cd5\u201c\u6ce8\u518c\u201d\u7ed9\u670d\u52a1\u5668：<\/p>\n Dict my_dict(".\/dictionary.txt");
\nUdpServer server(ip, port);
\n\/\/ \u6ce8\u518c\u56de\u8c03：\u4ee5\u540e\u6536\u5230\u6570\u636e，\u5c31\u8c03\u7528 my_dict \u7684 Translate \u65b9\u6cd5
\nserver.RegisterCallback(std::bind(&Dict::Translate, &my_dict, std::placeholders::_1, std::placeholders::_2));<\/p>\n 3. \u89e6\u53d1\u56de\u8c03（\u5728\u00a0UdpServer::Start()\u00a0\u5faa\u73af\u4e2d）：
\n\u5f53\u00a0recvfrom\u00a0\u6536\u5230\u6570\u636e\u540e，\u670d\u52a1\u5668\u4e0d\u9700\u8981\u77e5\u9053\u5177\u4f53\u600e\u4e48\u7ffb\u8bd1（\u90a3\u662f\u4e1a\u52a1\u5c42\u7684\u4e8b）\u3002\u5b83\u53ea\u9700\u8981\u8c03\u7528\u90a3\u4e2a\u56de\u8c03\u5373\u53ef：<\/p>\n \/\/ \u6536\u5230\u6d88\u606f\u540e
\nstd::string result = _callback(buffer, peer_addr); \/\/ \u89e6\u53d1\u56de\u8c03，\u6267\u884c\u7ffb\u8bd1
\nsendto(…, result, …); \/\/ \u628a\u7ffb\u8bd1\u7ed3\u679c\u53d1\u56de\u53bb<\/p>\n
\n4.\u4e3a\u4ec0\u4e48\u8981\u7528\u00a0std::function\u00a0\u800c\u4e0d\u662f C \u8bed\u8a00\u7684\u51fd\u6570\u6307\u9488？<\/p>\n \u5728 C \u8bed\u8a00\u91cc，\u56de\u8c03\u901a\u5e38\u5199\u6210\u8fd9\u6837：<\/p>\n typedef void (*func_ptr)(int);<\/p>\n \u5b83\u53ea\u80fd\u6307\u5411\u666e\u901a\u7684\u5168\u5c40\u51fd\u6570，\u65e0\u6cd5\u6307\u5411\u7c7b\u7684\u6210\u5458\u51fd\u6570，\u4e5f\u65e0\u6cd5\u6355\u83b7\u5c40\u90e8\u53d8\u91cf（\u6bd4\u5982 Lambda \u91cc\u7684\u00a0[]）\u3002<\/p>\n \u800c\u00a0std::function\u00a0\u662f C++ \u7684\u73b0\u4ee3\u5229\u5668，\u5b83\u53ef\u4ee5\u7edf\u4e00\u88c5\u4e0b：<\/p>\n - \n
\u666e\u901a\u51fd\u6570<\/p>\n<\/li>\n - \n
\u7c7b\u7684\u9759\u6001\u6210\u5458\u51fd\u6570<\/p>\n<\/li>\n - \n
\u7c7b\u7684\u666e\u901a\u6210\u5458\u51fd\u6570（\u914d\u5408\u00a0std::bind\u00a0\u6216 Lambda）<\/p>\n<\/li>\n - \n
Lambda \u8868\u8fbe\u5f0f（\u6781\u5176\u65b9\u4fbf）<\/p>\n<\/li>\n - \n
\u4eff\u51fd\u6570（\u91cd\u8f7d\u4e86\u00a0operator()\u00a0\u7684\u7c7b）<\/p>\n<\/li>\n \u8fd9\u884c\u4ee3\u7801\u7684\u5999\u5904\u5728\u4e8e：\u00a0\u5b83\u628a\u201c\u4e1a\u52a1\u903b\u8f91（\u7ffb\u8bd1）\u201d\u548c\u201c\u7f51\u7edc\u6846\u67b6（\u6536\u53d1\u6570\u636e）\u201d\u5f7b\u5e95\u89e3\u8026\u4e86\u3002\u670d\u52a1\u5668\u53ea\u7ba1\u6536\u53d1，\u5177\u4f53\u600e\u4e48\u7ffb\u8bd1，\u7531\u4f60\u6ce8\u518c\u8fdb\u53bb\u7684\u56de\u8c03\u51fd\u6570\u8bf4\u4e86\u7b97\u3002\u8fd9\u5c31\u53eb\u9762\u5411\u63a5\u53e3\u7f16\u7a0b<\/span><\/span>\u3002<\/p>\n
\n\u5f00\u5f20：\u521b\u5efa\u5957\u63a5\u5b57<\/p>\n void Init()
\n{
\n _sockfd = socket(AF_INET, SOCK_DGRAM, 0);
\n if (_sockfd < 0)
\n {
\n LOG(LogLevel::FATAL) << "socket error!";
\n exit(1);
\n }
\n LOG(LogLevel::INFO) << "socket success, sockfd : " << _sockfd;<\/p>\n socket \u5c31\u50cf\u5411\u64cd\u4f5c\u7cfb\u7edf\u7533\u8bf7\u4e00\u53f0\u5bf9\u8bb2\u673a：<\/p>\n \n- \n
AF_INET \u8868\u793a\u7528 IPv4；<\/p>\n<\/li>\n - \n
SOCK_DGRAM \u8868\u793a\u8981"\u6570\u636e\u62a5"\u7c7b\u578b\u7684\u5bf9\u8bb2\u673a\u2014\u2014\u8fd9\u5c31\u662f UDP（\u60f3\u8981 TCP \u5c31\u586b SOCK_STREAM）；<\/p>\n<\/li>\n - \n
\u8fd4\u56de\u503c\u662f\u4e00\u4e2a\u6574\u6570\u53eb\u6587\u4ef6\u63cf\u8ff0\u7b26，\u6210\u529f\u65f6\u4e00\u822c\u4ece 3 \u5f00\u59cb（0\u30011\u30012 \u88ab\u6807\u51c6\u8f93\u5165\u3001\u6807\u51c6\u8f93\u51fa\u3001\u6807\u51c6\u9519\u8bef\u63d0\u524d\u5360\u4e86），\u5931\u8d25\u8fd4\u56de -1\u3002<\/p>\n<\/li>\n<\/ul>\n
\n\u79df\u95e8\u9762：\u586b\u5730\u5740 + bind<\/p>\n struct sockaddr_in local;
\n bzero(&local, sizeof(local));
\n local.sin_family = AF_INET;
\n local.sin_port = htons(_port);
\n local.sin_addr.s_addr = INADDR_ANY;<\/p>\n int n = bind(_sockfd, (struct sockaddr *)&local, sizeof(local));
\n if (n < 0)
\n {
\n LOG(LogLevel::FATAL) << "bind error";
\n exit(2);
\n }
\n}<\/p>\n struct sockaddr_in<\/span> \u5c31\u662f\u670d\u52a1\u5668\u7684"\u6536\u4ef6\u5730\u5740"，\u8981\u586b\u4e09\u6837\u4e1c\u897f\u3002\u8fd9\u91cc\u6bcf\u4e2a\u7ec6\u8282\u90fd\u6709\u8bb2\u7a76：<\/span><\/span><\/p>\nbzero \u5148\u6e05\u96f6<\/span><\/span>\u3002 \u7ed3\u6784\u4f53\u91cc\u6709\u4e9b\u5b57\u6bb5\u6211\u4eec\u6ca1\u586b，\u4e0d\u6e05\u96f6\u7684\u8bdd\u91cc\u9762\u662f\u968f\u673a\u5783\u573e\u503c，\u53ef\u80fd\u57cb\u96f7\u3002\u8fd9\u662f\u7f51\u7edc\u7f16\u7a0b\u7684\u808c\u8089\u8bb0\u5fc6\u3002<\/p>\nhtons(_port)：\u4e3a\u4ec0\u4e48\u7aef\u53e3\u53f7\u8fd8\u8981\u8f6c\u6362？<\/span><\/span> \u56e0\u4e3a\u4e0d\u540c CPU \u5b58\u6570\u5b57\u7684\u5b57\u8282\u987a\u5e8f\u4e0d\u4e00\u6837（\u6709\u7684\u5927\u7aef\u3001\u6709\u7684\u5c0f\u7aef），\u7f51\u7edc\u4e16\u754c\u7ea6\u5b9a\u5927\u5bb6\u7edf\u4e00\u7528\u5927\u7aef\u4f20\u8f93\u3002htons \u5c31\u662f"host to network short"，\u628a\u672c\u673a\u683c\u5f0f\u7ffb\u8bd1\u6210\u7f51\u7edc\u901a\u7528\u683c\u5f0f\u3002\u4e0d\u8f6c\u7684\u8bdd，\u4f60\u4f20 8080，\u5bf9\u65b9\u770b\u5230\u7684\u53ef\u80fd\u662f\u4e00\u4e2a\u83ab\u540d\u5176\u5999\u7684\u7aef\u53e3\u3002<\/p>\nINADDR_ANY：\u672c\u5e97\u5730\u5740\u5199"\u54ea\u513f\u90fd\u884c"<\/span><\/span>\u3002 \u8fd9\u662f\u65b0\u624b\u6700\u5bb9\u6613\u61f5\u7684\u5730\u65b9，\u591a\u8bf4\u4e24\u53e5\u3002<\/p>\n
\n\u4e00\u53f0\u670d\u52a1\u5668\u5f80\u5f80\u6709\u591a\u5757\u7f51\u5361（127.0.0.1 \u56de\u73af\u7f51\u5361\u300110.0.0.2 \u5c40\u57df\u7f51\u7f51\u5361\u2026\u2026）\u3002\u5982\u679c bind \u65f6\u5199\u6b7b\u67d0\u4e2a IP，\u5c31\u7b49\u4e8e\u544a\u8bc9\u90ae\u5c40"\u53ea\u6536\u9001\u5230\u8fd9\u4e2a\u95e8\u7684\u4fe1"，\u5ba2\u6237\u7aef\u6362\u4e2a IP \u8bbf\u95ee\u5c31\u6536\u4e0d\u5230\u4e86\u3002\u586b INADDR_ANY（\u503c\u5c31\u662f 0.0.0.0）\u7684\u610f\u601d\u662f：\u672c\u673a\u6240\u6709\u7f51\u5361\u4e0a\u7684\u6570\u636e\u6211\u90fd\u6536<\/span><\/span>\u3002\u7528 ss -uln \u80fd\u770b\u5230\u5b83\u663e\u793a\u4e3a：<\/p>\nUNCONN 0 0 0.0.0.0:8080 0.0.0.0:*<\/p>\n 0.0.0.0 \u5c31\u662f"\u4e0d\u6311\u7f51\u5361"\u7684\u610f\u601d\u3002\u987a\u5e26\u4e00\u63d0，\u5b83\u7684\u503c\u662f 0，0 \u600e\u4e48\u8f6c\u5b57\u8282\u5e8f\u8fd8\u662f 0，\u6240\u4ee5\u8fd9\u91cc\u4e0d\u7528\u518d\u5305 htonl\u3002<\/p>\n
\n\u4e3a\u4ec0\u4e48\u670d\u52a1\u5668\u5fc5\u987b bind，\u5ba2\u6237\u7aef\u5374\u4e0d\u7528？<\/span><\/span><\/p>\n\u56e0\u4e3a\u670d\u52a1\u5668\u7684\u95e8\u724c\u53f7\u5fc5\u987b\u56fa\u5b9a\u4e14\u4f17\u6240\u5468\u77e5，\u5ba2\u6237\u7aef\u624d\u77e5\u9053\u53bb\u54ea\u91cc\u627e\u5b83\u2014\u2014\u6ca1\u4eba\u4f1a\u4e09\u5929\u4e24\u5934\u6362\u5730\u5740\u5f00\u5e97\u3002\u5ba2\u6237\u7aef\u7684\u7aef\u53e3\u662f\u51e0\u53f7\u65e0\u6240\u8c13，\u64cd\u4f5c\u7cfb\u7edf\u7b2c\u4e00\u6b21\u53d1\u6d88\u606f\u65f6\u5e2e\u5b83\u968f\u673a\u6311\u4e00\u4e2a\u7a7a\u95f2\u7684\u5c31\u884c，\u8fd8\u80fd\u907f\u514d\u4f60\u540c\u65f6\u5f00\u4e24\u4e2a\u5ba2\u6237\u7aef\u65f6\u7aef\u53e3\u6253\u67b6\u3002<\/p>\n
\n\u8425\u4e1a：\u6536\u53d1\u5faa\u73af<\/p>\n void Start()
\n{
\n _isrunning = true;
\n while (_isrunning)
\n {
\n char buffer[1024];
\n struct sockaddr_in peer;
\n socklen_t len = sizeof(peer);<\/p>\n ssize_t s = recvfrom(_sockfd, buffer, sizeof(buffer) – 1, 0,
\n (struct sockaddr *)&peer, &len);
\n if (s > 0)
\n {
\n InetAddr client(peer);
\n buffer[s] = 0;
\n std::string result = _func(buffer, client);<\/p>\n sendto(_sockfd, result.c_str(), result.size(), 0,
\n (struct sockaddr*)&peer, len);
\n }
\n }
\n}<\/p>\n recvfrom \u8fd9\u4e2a\u51fd\u6570\u5f88\u8d2a\u5fc3，\u4e00\u6b21\u5e72\u4e24\u4ef6\u4e8b：\u628a\u6570\u636e\u6536\u8fdb buffer，\u540c\u65f6\u628a\u53d1\u9001\u65b9\u7684\u5b8c\u6574\u5730\u5740\u585e\u8fdb <\/span>peer<\/span><\/span>\u3002\u8fd9\u592a\u91cd\u8981\u4e86\u2014\u2014\u670d\u52a1\u5668\u6536\u5230\u4fe1\u7684\u540c\u65f6\u4e5f\u62ff\u5230\u4e86"\u5bc4\u4ef6\u4eba\u5730\u5740"，\u5f85\u4f1a\u513f\u56de\u4fe1\u7528\u7684\u5c31\u662f\u5b83\u3002UDP \u670d\u52a1\u5668\u56e0\u6b64\u4e0d\u7528\u7ef4\u62a4\u4efb\u4f55\u5ba2\u6237\u7aef\u540d\u5355，\u6765\u4e00\u4e2a\u4eba\u670d\u52a1\u4e00\u4e2a\u4eba，\u4e00\u4e07\u4e2a\u5ba2\u6237\u7aef\u4e5f\u4e0d\u6015\u3002<\/p>\n\u6536\u5230\u6570\u636e\u540e\u505a\u4e09\u4ef6\u4e8b：<\/p>\n - \n
InetAddr client(peer)：\u628a\u539f\u59cb\u5730\u5740\u5305\u88c5\u6210\u4e00\u4e2a\u597d\u7528\u7684\u5bf9\u8c61（2.3 \u8282\u8bb2）；<\/p>\n<\/li>\n - \n
_func(buffer, client)：\u628a\u6d88\u606f\u4ea4\u7ed9\u56de\u8c03\u51fd\u6570\u5904\u7406，\u62ff\u56de\u7ed3\u679c；<\/p>\n<\/li>\n - \n
sendto(…)：\u628a\u7ed3\u679c\u7167\u7740 peer \u5730\u5740\u5bc4\u56de\u53bb\u3002<\/p>\n<\/li>\n
\n2.2 \u4e24\u4e2a\u5fc5\u987b\u77e5\u9053\u7684\u5751：\u62a5\u6587\u8fb9\u754c\u548c\u7ed3\u5c3e\u7684 \\\\0<\/h4>\nUDP \u4f1a\u4e0d\u4f1a"\u7c98\u5305"？<\/span> <\/span><\/span>\u8fd9\u662f\u9762\u8bd5\u9ad8\u9891\u9898，\u5728\u8fd9\u4e2a\u9879\u76ee\u91cc\u4f60\u53ef\u4ee5\u4eb2\u624b\u4f53\u4f1a\u3002TCP \u50cf\u4e00\u6761\u6cb3，\u6570\u636e\u662f\u6c34，\u591a\u6b21\u53d1\u9001\u53ef\u80fd\u8fde\u6210\u4e00\u7247，\u63a5\u6536\u65b9\u5206\u4e0d\u6e05\u54ea\u6bb5\u662f\u54ea\u53e5\u2014\u2014\u90a3\u624d\u53eb\u7c98\u5305\u3002UDP \u4e0d\u4e00\u6837，\u5b83\u50cf\u5bc4\u5feb\u9012，\u4f60 sendto \u4e00\u6b21\u5c31\u662f\u4e00\u4e2a\u72ec\u7acb\u7684\u5305\u88f9，recvfrom \u4e00\u6b21\u6536\u4e00\u4e2a\u5305\u88f9<\/span><\/span>，\u62a5\u6587\u8fb9\u754c\u662f\u64cd\u4f5c\u7cfb\u7edf\u5e2e\u4f60\u5b88\u4f4f\u7684\u3002\u5ba2\u6237\u7aef\u53d1\u4e00\u884c\u3001\u670d\u52a1\u5668\u6536\u4e00\u884c，\u5929\u7136\u4e0d\u4f1a\u7c98\u3002<\/p>\n\u90a3\u4e2d\u6587\u4e71\u7801\u3001\u5c3e\u90e8\u810f\u5b57\u7b26\u662f\u600e\u4e48\u56de\u4e8b？<\/span> <\/span><\/span>\u770b\u8fd9\u884c：<\/p>\nbuffer[s] = 0;<\/p>\n UDP \u5305\u88f9\u91cc\u88c5\u7684\u662f\u7eaf\u6570\u636e，\u4e0d\u4f1a\u81ea\u5e26 C \u5b57\u7b26\u4e32\u7ed3\u5c3e\u7684 <\/span>'\\\\0'<\/span><\/span>\u3002recvfrom \u8fd4\u56de\u7684 s \u662f\u8fd9\u6b21\u6536\u5230\u7684\u5b57\u8282\u6570，\u6bd4\u5982 5，\u90a3 buffer \u91cc\u53ea\u6709\u524d 5 \u4e2a\u5b57\u8282\u662f\u6709\u6548\u7684，\u540e\u9762\u5168\u662f\u4e0a\u4e00\u6b21\u7684\u6b8b\u7559\u6216\u8005\u5783\u573e\u503c\u3002\u76f4\u63a5\u5f53\u5b57\u7b26\u4e32\u6253\u5370，\u5c31\u4f1a\u8bfb\u51fa \u82f9\u679c\u70eb\u70eb\u70eb\u70eb \u8fd9\u79cd\u9b3c\u4e1c\u897f\u3002\u624b\u52a8\u5728\u6709\u6548\u6570\u636e\u672b\u5c3e\u8865\u4e00\u4e2a 0，\u5b57\u7b26\u4e32\u624d\u77e5\u9053\u81ea\u5df1\u5728\u54ea\u513f\u7ed3\u675f\u3002<\/p>\n\u81f3\u4e8e\u4e2d\u6587\u80fd\u6b63\u5e38\u663e\u793a，\u662f\u56e0\u4e3a\u5ba2\u6237\u7aef\u3001\u670d\u52a1\u5668\u3001\u7ec8\u7aef\u90fd\u7edf\u4e00\u7528 UTF-8，\u4e2d\u6587\u6309\u5b57\u8282\u539f\u6837\u642c\u8fd0\u3001\u539f\u6837\u663e\u793a，\u7a0b\u5e8f\u6839\u672c\u4e0d\u9700\u8981"\u8ba4\u8bc6"\u4e2d\u6587\u3002<\/p>\n \u957f\u5ea6\u4e5f\u8981\u7559\u4e2a\u5fc3\u773c<\/span>：<\/span><\/span>\u6536\u5305\u957f\u5ea6\u4f20\u7684\u662f sizeof(buffer) – 1（1023），\u6545\u610f\u7559\u4e00\u4e2a\u5b57\u8282\u653e '\\\\0'\u3002\u5982\u679c\u5ba2\u6237\u7aef\u53d1\u6765 2000 \u5b57\u8282，UDP \u4f1a\u76f4\u63a5\u628a\u88c5\u4e0d\u4e0b\u7684\u90e8\u5206\u4e22\u6389（\u622a\u65ad），\u8fd9\u662f UDP "\u5c3d\u529b\u800c\u4e3a\u3001\u4e0d\u8d1f\u8d23"\u7684\u672c\u6027\u3002<\/p>\n
\n2.3 InetAddr：\u7ed9\u88f8\u5730\u5740\u5957\u4e00\u4ef6\u8212\u670d\u7684\u5916\u5957<\/h4>\nrecvfrom \u7ed9\u7684 sockaddr_in \u662f\u7ed9\u673a\u5668\u770b\u7684：\u7aef\u53e3\u662f\u7f51\u7edc\u5b57\u8282\u5e8f\u7684\u6574\u6570，IP \u662f 4 \u5b57\u8282\u4e8c\u8fdb\u5236\u3002\u4eba\u60f3\u770b\u7684\u662f 127.0.0.1 \u548c 58050\u3002InetAddr.hpp \u5c31\u5e72\u8fd9\u4e00\u4ef6\u4e8b：<\/p>\n class InetAddr
\n{
\npublic:
\n InetAddr(struct sockaddr_in &addr) : _addr(addr)
\n {
\n _port = ntohs(_addr.sin_port); \/\/ \u7f51\u7edc\u5e8f \u2192 \u4e3b\u673a\u5e8f
\n _ip = inet_ntoa(_addr.sin_addr); \/\/ 4\u5b57\u8282IP \u2192 "127.0.0.1"
\n }
\n uint16_t Port() { return _port; }
\n std::string Ip() { return _ip; }<\/p>\n private:
\n struct sockaddr_in _addr;
\n std::string _ip;
\n uint16_t _port;
\n};<\/p>\n \u4e24\u4e2a\u8f6c\u6362\u51fd\u6570\u6b63\u597d\u548c\u53d1\u9001\u65f6\u76f8\u53cd：<\/p>\n \n- \n
ntohs：network to host short，\u7aef\u53e3\u53f7\u7ffb\u8bd1\u56de\u672c\u673a\u683c\u5f0f；<\/p>\n<\/li>\n - \n
inet_ntoa：\u628a 4 \u5b57\u8282\u7f51\u7edc\u5730\u5740\u8f6c\u6210\u70b9\u5206\u5341\u8fdb\u5236\u5b57\u7b26\u4e32（n \u662f network，a \u662f ASCII）\u3002<\/p>\n<\/li>\n<\/ul>\n \u6ce8\u610f\u6210\u5458 _addr \u662f\u6309\u503c\u62f7\u8d1d<\/span><\/span>\u7684，\u4e0d\u662f\u5f15\u7528\u3002\u6784\u9020\u65f6\u5c31\u628a\u8fd9\u4efd\u5730\u5740\u5feb\u7167\u5b58\u4e0b\u6765，\u4e4b\u540e\u5c31\u7b97\u5916\u9762\u7684 peer \u88ab\u4e0b\u4e00\u4e2a\u5ba2\u6237\u7aef\u8986\u76d6\u4e86，\u8fd9\u4e2a\u5bf9\u8c61\u91cc\u7559\u7684\u8fd8\u662f\u5f53\u65f6\u90a3\u4f4d\u5ba2\u4eba\u7684\u5730\u5740，\u5f88\u7a33\u59a5\u3002<\/p>\n
\n2.4 \u5e97\u957f\u767b\u573a：UdpServer.cc \u600e\u4e48\u628a\u96f6\u4ef6\u62fc\u8d77\u6765<\/h4>\nint main(int argc, char *argv[])
\n{
\n if(argc != 2)
\n {
\n std::cerr << "Usage: " << argv[0] << " port" << std::endl;
\n return 1;
\n }
\n uint16_t port = std::stoi(argv[1]);
\n Enable_Console_Log_Strategy();<\/p>\n Dict dict;
\n if (!dict.LoadDict())
\n {
\n LOG(LogLevel::FATAL) << "\u5b57\u5178\u52a0\u8f7d\u5931\u8d25，\u670d\u52a1\u5668\u9000\u51fa";
\n return 2;
\n }<\/p>\n std::unique_ptr<UdpServer> usvr = std::make_unique<UdpServer>(
\n port,
\n [&dict](const std::string &word, InetAddr &cli) -> std::string {
\n return dict.Translate(word, cli);
\n });
\n usvr->Init();
\n usvr->Start();
\n return 0;
\n}<\/p>\n \u5e97\u957f\u5f00\u5e97\u5206\u4e09\u6b65：\u628a\u8bcd\u6c47\u624b\u518c\u7ffb\u597d（\u52a0\u8f7d\u8bcd\u5178）\u2192 \u96c7\u597d\u524d\u53f0（\u521b\u5efa\u670d\u52a1\u5668，\u5e76\u544a\u8bc9\u5b83"\u6536\u5230\u5355\u8bcd\u4ea4\u7ed9\u8bcd\u5178\u7ffb\u8bd1"）\u2192 \u5f00\u95e8\u8425\u4e1a\u3002<\/span><\/p>\n\u91cd\u70b9\u770b\u8fd9\u4e2a lambda\u3002UdpServer \u7684\u6784\u9020\u51fd\u6570\u9700\u8981\u4e00\u4e2a"\u5403\u5b57\u7b26\u4e32\u3001\u5410\u5b57\u7b26\u4e32"\u7684\u51fd\u6570，\u8fd9\u91cc\u7528\u4e00\u4e2a\u533f\u540d\u51fd\u6570（lambda）\u5c31\u5730\u5199\u597d：<\/p>\n [&dict](const std::string &word, InetAddr &cli) -> std::string {
\n return dict.Translate(word, cli);
\n}<\/p>\n \n- \n
[&dict] \u8868\u793a\u6309\u5f15\u7528\u6355\u83b7\u5916\u9762\u7684\u8bcd\u5178\u5bf9\u8c61，lambda \u5185\u90e8\u5c31\u80fd\u76f4\u63a5\u7528\u5b83；<\/p>\n<\/li>\n - \n
\u670d\u52a1\u5668\u6bcf\u6536\u5230\u4e00\u4e2a\u5355\u8bcd，\u5c31\u56de\u8c03\u4e00\u6b21\u8fd9\u4e2a\u51fd\u6570\u3002<\/p>\n<\/li>\n<\/ul>\n \u4e3a\u4ec0\u4e48\u8981\u7ed5\u8fd9\u4e00\u5c42，\u4e0d\u76f4\u63a5\u5728\u670d\u52a1\u5668\u91cc #include "Dict.hpp" \u7136\u540e\u67e5\u8bcd\u5178？\u56e0\u4e3a\u90a3\u6837\u7f51\u7edc\u4ee3\u7801\u548c\u4e1a\u52a1\u4ee3\u7801\u5c31\u710a\u6b7b\u4e86，\u4ee5\u540e\u60f3\u628a"\u7ffb\u8bd1"\u6362\u6210"\u8ba1\u7b97\u5e73\u65b9"，\u5f97\u52a8\u670d\u52a1\u5668\u7684\u4e94\u810f\u5e99\u3002\u73b0\u5728\u7684\u5206\u5de5\u662f：\u670d\u52a1\u5668\u53ea\u61c2\u5feb\u9012，\u8bcd\u5178\u53ea\u61c2\u7ffb\u8bd1，\u4e2d\u95f4\u7528\u4e00\u4e2a\u51fd\u6570\u6307\u9488\u4e00\u6837\u7684\u4e1c\u897f\u8fde\u63a5，\u5404\u81ea\u80fd\u72ec\u7acb\u751f\u957f\u3002\u8fd9\u5c31\u662f\u89e3\u8026\u3002<\/p>\n
\n2.5 \u5ba2\u6237\u7aef：\u4e00\u4e2a\u7b49\u56de\u4fe1\u7684\u987e\u5ba2<\/h4>\nUdpClient.cc \u7684\u6838\u5fc3\u5faa\u73af：<\/p>\n while(true)
\n{
\n std::string input;
\n std::cout << "Please Enter# " << std::flush;
\n if (!std::getline(std::cin, input)) \/\/ Ctrl+D：\u8f93\u5165\u7ed3\u675f
\n break;
\n if (input.empty()) \/\/ \u7a7a\u884c\u4e0d\u53d1
\n continue;<\/p>\n int n = sendto(sockfd, input.c_str(), input.size(), 0,
\n (struct sockaddr*)&server, sizeof(server));
\n (void)n;<\/p>\n char buffer[1024];
\n struct sockaddr_in peer;
\n socklen_t len = sizeof(peer);
\n int m = recvfrom(sockfd, buffer, sizeof(buffer)-1, 0,
\n (struct sockaddr*)&peer, &len);
\n if(m > 0)
\n {
\n buffer[m] = 0;
\n std::cout << buffer << std::endl;
\n }
\n}<\/p>\n \u5ba2\u6237\u7aef\u540c\u6837\u8981 socket \u7533\u8bf7\u5bf9\u8bb2\u673a，\u4f46\u53ea\u586b\u670d\u52a1\u5668\u5730\u5740，\u4e0d bind：<\/p>\n struct sockaddr_in server;
\nmemset(&server, 0, sizeof(server));
\nserver.sin_family = AF_INET;
\nserver.sin_port = htons(server_port);
\nserver.sin_addr.s_addr = inet_addr(server_ip.c_str());<\/p>\n inet_addr \u628a "127.0.0.1" \u76f4\u63a5\u8f6c\u6210\u7f51\u7edc\u5b57\u8282\u5e8f\u7684 4 \u5b57\u8282\u6574\u6570，\u6240\u4ee5\u4e0d\u7528\u518d htonl\u3002\u4e4b\u540e\u7b2c\u4e00\u6b21 sendto \u65f6，\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u7ed9\u5ba2\u6237\u7aef\u5206\u914d IP \u548c\u968f\u673a\u7aef\u53e3\u2014\u2014\u8fd9\u5c31\u662f\u524d\u9762\u8bf4\u7684"\u987e\u5ba2\u4e0d\u9700\u8981\u56fa\u5b9a\u644a\u4f4d"\u3002<\/p>\n \u8fd9\u91cc\u6709\u4e24\u884c\u662f\u8e29\u5751\u540e\u957f\u51fa\u6765\u7684"\u62a4\u680f"，\u503c\u5f97\u4e13\u95e8\u8bb2：<\/p>\n if (!std::getline(…)) break;：\u5f53\u4f60\u6309 Ctrl+D（\u8f93\u5165\u6d41\u7ed3\u675f），getline \u4f1a\u5931\u8d25\u3002\u5982\u679c\u4e0d\u68c0\u67e5，\u5faa\u73af\u91cc input \u4e00\u76f4\u662f\u7a7a\u7684，\u7a0b\u5e8f\u5c31\u4f1a\u539f\u5730\u75af\u72c2\u7a7a\u8f6c\u3001\u5237\u5c4f，\u5b9e\u6d4b\u80fd\u77ac\u95f4\u5237\u51fa\u51e0\u5341 MB \u7684\u8f93\u51fa\u3002<\/p>\n if (input.empty()) continue;：\u76f4\u63a5\u6309\u56de\u8f66\u4f1a\u4ea7\u751f\u7a7a\u5b57\u7b26\u4e32\u3002\u66f4\u9690\u853d\u7684\u5751\u662f\u2014\u2014\u7a7a\u5b57\u7b26\u4e32\u4e5f\u4f1a\u89e6\u53d1 sendto，\u53d1\u51fa\u4e00\u4e2a 0 \u5b57\u8282\u7684 UDP \u5305\u88f9；\u670d\u52a1\u5668\u90a3\u8fb9 recvfrom \u8fd4\u56de 0，\u4ee3\u7801\u5224\u65ad if (s > 0) \u4e0d\u6210\u7acb，\u4e8e\u662f\u65e2\u4e0d\u5904\u7406\u4e5f\u4e0d\u56de\u590d，\u5ba2\u6237\u7aef\u5c31\u4f1a\u6c38\u8fdc\u5835\u5728 recvfrom \u7b49\u4e00\u5c01\u6c38\u8fdc\u4e0d\u4f1a\u6765\u7684\u56de\u4fe1\u3002\u6240\u4ee5\u7a7a\u884c\u5e72\u8106\u4e0d\u53d1\u3002<\/p>\n \u53e6\u5916 std::cout << … << std::flush \u7528 flush \u800c\u4e0d\u662f endl：\u53ea\u9700\u8981\u8ba9\u63d0\u793a\u7b26\u7acb\u523b\u8e66\u51fa\u6765，\u5149\u6807\u505c\u5728 # \u540e\u9762\u7b49\u4f60\u6253\u5b57，\u4e0d\u9700\u8981\u6362\u884c\u3002<\/p>\n
\n\u4e09\u3001\u8bcd\u5178\u4e1a\u52a1\u6a21\u5757：\u7ffb\u8bd1\u529f\u80fd\u662f\u600e\u4e48\u5b9e\u73b0\u7684<\/h3>\n3.1 \u8bcd\u5e93\u957f\u4ec0\u4e48\u6837：dictionary.txt<\/h4>\napple: \u82f9\u679c
\nbanana: \u9999\u8549
\ncat: \u732b
\ndog: \u72d7
\nbook: \u4e66
\npen: \u7b14
\nhappy: \u5feb\u4e50\u7684
\nsad: \u60b2\u4f24\u7684
\nrun: \u8dd1
\njump: \u8df3
\nteacher: \u8001\u5e08
\nstudent: \u5b66\u751f
\ncar: \u6c7d\u8f66
\nbus: \u516c\u4ea4\u8f66
\nlove: \u7231
\nhate: \u6068
\nhello: \u4f60\u597d
\ngoodbye: \u518d\u89c1
\nsummer: \u590f\u5929
\nwinter: \u51ac\u5929<\/p>\n 20 \u4e2a\u8bcd\u6761，\u6bcf\u884c\u4e00\u6761，\u683c\u5f0f\u7b80\u5355\u7c97\u66b4：\u82f1\u6587 + \u5192\u53f7\u7a7a\u683c + \u4e2d\u6587\u3002\u6ce8\u610f\u5206\u9694\u7b26\u662f ": "（\u5192\u53f7\u5e26\u4e00\u4e2a\u7a7a\u683c），\u89e3\u6790\u65f6\u8981\u6309\u8fd9\u4e24\u4e2a\u5b57\u7b26\u5207\u3002<\/p>\n
\n3.2 Dict.hpp：\u52a0\u8f7d\u548c\u67e5\u8be2<\/h4>\n\u6570\u636e\u7ed3\u6784\u9009\u578b\u51e0\u4e4e\u4e0d\u7528\u60f3：\u82f1\u6587\u5230\u4e2d\u6587\u7684\u4e00\u4e00\u5bf9\u5e94，unordered_map \u5929\u9009\u4e4b\u5b50，\u67e5\u8bcd\u5e73\u5747 O(1)：<\/p>\n using namespace LogModule;<\/p>\n class Dict
\n{
\npublic:
\n Dict(const std::string &path = defaultdict) : _dict_path(path) {}<\/p>\n bool LoadDict()
\n {
\n std::ifstream in(_dict_path);
\n if (!in.is_open())
\n {
\n LOG(LogLevel::ERROR) << "\u6253\u5f00\u5b57\u5178: " << _dict_path << " \u9519\u8bef";
\n return false;
\n }
\n std::string line;
\n while (std::getline(in, line))
\n {
\n auto pos = line.find(sep);
\n if (pos == std::string::npos)
\n {
\n LOG(LogLevel::WARNING) << "\u89e3\u6790: " << line << " \u5931\u8d25";
\n continue;
\n }
\n std::string english = line.substr(0, pos);
\n std::string chinese = line.substr(pos + sep.size());
\n if (english.empty() || chinese.empty())
\n {
\n LOG(LogLevel::WARNING) << "\u6ca1\u6709\u6709\u6548\u5185\u5bb9: " << line;
\n continue;
\n }
\n _dict.insert(std::make_pair(english, chinese));
\n LOG(LogLevel::DEBUG) << "\u52a0\u8f7d: " << line;
\n }
\n in.close();
\n return true;
\n }<\/p>\n \u9010\u884c\u8bfb\u6587\u4ef6，\u7136\u540e\u4e00\u884c\u91cc\u505a"\u5207\u86cb\u7cd5"：<\/p>\n \n- \n
line.find(": ") \u627e\u5230\u5206\u9694\u7b26\u7684\u4f4d\u7f6e；\u627e\u4e0d\u5230\u8fd4\u56de npos（\u53ef\u4ee5\u7406\u89e3\u6210"\u65e0\u5c3d\u5934"\u7684\u54e8\u5175\u503c），\u8fd9\u884c\u662f\u574f\u6570\u636e，\u8bb0\u4e00\u6761 WARNING \u8df3\u8fc7，\u4e0d\u8ba9\u4e00\u9897\u8001\u9f20\u5c4e\u641e\u5d29\u6574\u4e2a\u542f\u52a8\u8fc7\u7a0b；<\/p>\n<\/li>\n - \n
substr(0, pos) \u53d6\u5192\u53f7\u524d\u534a\u6bb5\u82f1\u6587；<\/p>\n<\/li>\n - \n
substr(pos + sep.size()) \u53d6\u5192\u53f7\u7a7a\u683c\u4e4b\u540e\u7684\u5168\u90e8\u5185\u5bb9\u5f53\u4e2d\u6587\u2014\u2014\u6240\u4ee5\u4e2d\u6587\u91ca\u4e49\u91cc\u5c31\u7b97\u5e26\u7a7a\u683c\u4e5f\u4e0d\u6015；<\/p>\n<\/li>\n - \n
\u4e24\u534a\u4efb\u610f\u4e00\u4e2a\u662f\u7a7a\u7684\u4e5f\u8df3\u8fc7\u3002<\/p>\n<\/li>\n<\/ul>\n \u8fd9\u79cd"\u52a0\u8f7d\u65f6\u5bb9\u9519"\u7684\u610f\u8bc6\u5f88\u91cd\u8981：\u6587\u4ef6\u662f\u53ef\u80fd\u88ab\u624b\u6539\u574f\u7684，\u7a0b\u5e8f\u4e0d\u80fd\u56e0\u4e3a\u67d0\u4e00\u884c\u683c\u5f0f\u9519\u4e86\u5c31\u8d4c\u6c14\u4e0d\u5e72\u3002<\/p>\n \u67e5\u8be2\u90e8\u5206：<\/p>\n std::string Translate(const std::string &word, InetAddr &client)
\n {
\n auto iter = _dict.find(word);
\n if (iter == _dict.end())
\n {
\n LOG(LogLevel::DEBUG) << "\u8fdb\u5165\u5230\u4e86\u7ffb\u8bd1\u6a21\u5757, ["
\n << client.Ip() << " : " << client.Port() << "]# "
\n << word << "->None";
\n return "None";
\n }
\n LOG(LogLevel::DEBUG) << "\u8fdb\u5165\u5230\u4e86\u7ffb\u8bd1\u6a21\u5757, ["
\n << client.Ip() << " : " << client.Port() << "]# "
\n << word << "->" << iter->second;
\n return iter->second;
\n }<\/p>\n private:
\n std::string _dict_path;
\n std::unordered_map<std::string, std::string> _dict;
\n};<\/p>\n find \u6ca1\u67e5\u5230\u65f6\u8fd4\u56de end()，\u6211\u4eec\u4e0d\u629b\u5f02\u5e38\u3001\u4e0d\u5d29\u6e83，\u53cb\u597d\u5730\u8fd4\u56de\u5b57\u7b26\u4e32 "None"，\u5ba2\u6237\u7aef\u7167\u539f\u6837\u663e\u793a\u5c31\u884c\u3002\u540c\u65f6\u5229\u7528\u4f20\u8fdb\u6765\u7684 client \u5730\u5740\u8bb0\u4e00\u6761\u65e5\u5fd7\u2014\u2014\u4e1a\u52a1\u5c42\u5c45\u7136\u77e5\u9053\u662f\u54ea\u4e2a\u5ba2\u4eba\u5728\u67e5\u8bcd<\/span><\/span>，\u8fd9\u5c31\u662f\u56de\u8c03\u7b7e\u540d\u91cc\u5e26 InetAddr& \u7684\u4ef7\u503c\u3002<\/p>\n\u8fd8\u6709\u4e2a\u5de5\u7a0b\u7ec6\u8282：LoadDict() \u7684\u8fd4\u56de\u503c\u5728 main \u91cc\u662f\u88ab\u8ba4\u771f\u68c0\u67e5\u7684，\u8bcd\u5178\u6587\u4ef6\u4e22\u4e86\u5c31 FATAL \u9000\u51fa\u3002\u5426\u5219\u670d\u52a1\u5668"\u6210\u529f\u542f\u52a8"\u5374\u5bf9\u6240\u6709\u5355\u8bcd\u90fd\u56de None，\u6392\u67e5\u8d77\u6765\u80fd\u8ba9\u4f60\u6000\u7591\u4eba\u751f\u3002<\/p>\n
\n\u56db\u3001\u65e5\u5fd7\u6a21\u5757：\u8ba9\u7a0b\u5e8f\u5b66\u4f1a"\u5199\u65e5\u8bb0"<\/h3>\n\u670d\u52a1\u5668\u4e00\u8dd1\u5c31\u662f\u6b7b\u5faa\u73af，\u51fa\u4e86\u95ee\u9898\u9760\u4ec0\u4e48\u8fd8\u539f\u73b0\u573a？\u9760\u65e5\u5fd7\u3002\u8fd9\u4e2a\u9879\u76ee\u6ca1\u6709\u7528\u4efb\u4f55\u7b2c\u4e09\u65b9\u5e93，\u81ea\u5df1\u624b\u5199\u4e86\u4e00\u4e2a\u8fd8\u633a\u50cf\u6837\u7684\u65e5\u5fd7\u7cfb\u7edf\u3002<\/p>\n
\n4.1 \u7b56\u7565\u6a21\u5f0f：\u65e5\u5fd7\u60f3\u6253\u54ea\u513f\u5c31\u6253\u54ea\u513f<\/h4>\n\u5148\u770b\u9876\u5c42\u8bbe\u8ba1\u3002\u65e5\u5fd7\u7684\u53bb\u5411\u53ef\u80fd\u662f\u5c4f\u5e55，\u4e5f\u53ef\u80fd\u662f\u6587\u4ef6，\u660e\u5929\u4e5f\u8bb8\u60f3\u53d1\u5230\u7f51\u7edc\u3002Log.hpp \u7528\u7b56\u7565\u6a21\u5f0f\u5904\u7406\u8fd9\u79cd\u53d8\u5316：\u5b9a\u4e00\u4e2a\u62bd\u8c61\u57fa\u7c7b\u5f53"\u63a5\u53e3"，\u518d\u6d3e\u751f\u51fa\u5177\u4f53\u5b9e\u73b0：<\/p>\n class LogStrategy
\n{
\npublic:
\n ~LogStrategy() = default;
\n virtual void SyncLog(const std::string &message) = 0;
\n};<\/p>\n \u5c4f\u5e55\u7b56\u7565\u7684\u6838\u5fc3\u5c31\u4e24\u884c（\u52a0\u9501 + \u8f93\u51fa）：<\/p>\n void SyncLog(const std::string &message) override
\n{
\n LockGuard lockguard(_mutex);
\n std::cout << message << gsep << std::flush;
\n}<\/p>\n \u6587\u4ef6\u7b56\u7565\u5219\u8d1f\u8d23"\u786e\u4fdd\u76ee\u5f55\u5b58\u5728 + \u8ffd\u52a0\u6253\u5f00\u6587\u4ef6 + \u5199\u5165"：<\/p>\n if (std::filesystem::exists(_path)) return;
\nstd::filesystem::create_directories(_path); \/\/ C++17，\u76ee\u5f55\u4e0d\u5b58\u5728\u5c31\u9012\u5f52\u5efa
\n…
\nstd::ofstream out(filename, std::ios::app); \/\/ app = \u8ffd\u52a0，\u4e0d\u8986\u76d6\u5386\u53f2
\nout << message << gsep;<\/p>\n \u7ba1\u7406\u65e5\u5fd7\u7684 Logger \u624b\u91cc\u6525\u7740\u4e00\u4e2a\u53ef\u4ee5\u968f\u65f6\u66ff\u6362\u7684\u6307\u9488：<\/p>\n std::unique_ptr<LogStrategy> _fflush_strategy;<\/p>\n \u60f3\u6362\u8f93\u51fa\u53bb\u5411？\u8ba9\u8fd9\u4e2a\u6307\u9488\u6307\u5411\u53e6\u4e00\u4e2a\u7b56\u7565\u5bf9\u8c61\u5c31\u884c，\u8c03\u7528\u65b9\u5b8c\u5168\u65e0\u611f\u3002\u8fd9\u5c31\u50cf\u5e97\u91cc\u7684\u6444\u50cf\u5934，\u4eca\u5929\u63a5\u76d1\u89c6\u5668\u3001\u660e\u5929\u63a5\u5f55\u50cf\u673a，\u6444\u50cf\u5934\u672c\u8eab\u4e0d\u7528\u6362\u3002<\/p>\n \u4e00\u6761\u5b8c\u6574\u65e5\u5fd7\u957f\u8fd9\u6837：<\/p>\n [2026-09-13 17:27:41] [DEBUG] [952447] [Dict.hpp] [62] – apple->\u82f9\u679c<\/p>\n \u65f6\u95f4\u3001\u7b49\u7ea7\u3001\u8fdb\u7a0b\u53f7\u3001\u6e90\u6587\u4ef6\u3001\u884c\u53f7\u3001\u6b63\u6587，\u516d\u8981\u7d20\u9f50\u5168\u3002\u65f6\u95f4\u6233\u7528 localtime_r（\u7ebf\u7a0b\u5b89\u5168\u7248\u672c，_r \u5c31\u662f reentrant \u53ef\u91cd\u5165\u7684\u610f\u601d），\u8fd8\u6709\u4e24\u4e2a\u7ecf\u5178\u51b7\u77e5\u8bc6：tm_year \u8981\u52a0 1900\u3001tm_mon \u4ece 0 \u5f00\u59cb\u6240\u4ee5\u8981\u52a0 1\u3002<\/p>\n
\n4.2 \u6d41\u5f0f\u65e5\u5fd7\u7684\u9b54\u6cd5：\u4e3a\u4ec0\u4e48\u80fd LOG(INFO) << "x" << 3？<\/h4>\n\u8fd9\u662f\u6574\u4e2a\u65e5\u5fd7\u7cfb\u7edf\u6700\u7cbe\u5de7\u7684\u5730\u65b9\u3002\u7528\u6cd5\u5927\u5bb6\u90fd\u719f：<\/p>\n LOG(LogLevel::INFO) << "bind success, sockfd : " << _sockfd;<\/p>\n \u53ef\u8fd9\u80cc\u540e\u662f\u600e\u4e48\u5de5\u4f5c\u7684？\u62c6\u5f00\u770b\u5b8f：<\/p>\n #define LOG(level) logger(level, __FILE__, __LINE__)<\/p>\n __FILE__ \u548c __LINE__ \u662f\u7f16\u8bd1\u5668\u5185\u5efa\u5b8f，\u81ea\u52a8\u53d8\u6210\u672c\u6587\u4ef6\u540d\u548c\u5f53\u524d\u884c\u53f7，\u6240\u4ee5\u6bcf\u6761\u65e5\u5fd7\u90fd\u80fd\u7cbe\u786e\u5b9a\u4f4d\u3002logger(…) \u8fd4\u56de\u4e00\u4e2a\u4e34\u65f6 <\/span>LogMessage<\/span> \u5bf9\u8c61<\/span><\/span>，\u5b83\u5728\u6784\u9020\u65f6\u5148\u62fc\u597d\u65e5\u5fd7\u7684\u5de6\u534a\u8fb9（\u65f6\u95f4\u3001\u7b49\u7ea7\u90a3\u4e9b\u56fa\u5b9a\u4fe1\u606f）：<\/p>\nLogMessage(LogLevel &level, std::string &src_name, int line_number, Logger &logger)
\n{
\n std::stringstream ss;
\n ss << "[" << _curr_time << "] "
\n << "[" << Level2Str(_level) << "] "
\n << "[" << _pid << "] "
\n << "[" << _src_name << "] "
\n << "[" << _line_number << "] – ";
\n _loginfo = ss.str();
\n}<\/p>\n \u7136\u540e\u9760\u6a21\u677f operator<< \u628a\u53f3\u8fb9\u7684\u5185\u5bb9\u4e00\u5757\u5757\u6512\u8fdb _loginfo：<\/p>\n template <typename T>
\nLogMessage &operator<<(const T &info)
\n{
\n std::stringstream ss;
\n ss << info;
\n _loginfo += ss.str();
\n return *this; \/\/ \u8fd4\u56de\u81ea\u5df1，\u624d\u80fd\u94fe\u5f0f << a << b << c
\n}<\/p>\n \u6700\u5999\u7684\u662f\u8f93\u51fa\u65f6\u673a\u2014\u2014\u5728\u6790\u6784\u51fd\u6570\u91cc<\/span>：<\/span><\/span><\/p>\n~LogMessage()
\n{
\n if (_logger._fflush_strategy)
\n _logger._fflush_strategy->SyncLog(_loginfo);
\n}<\/p>\n \u4e34\u65f6\u5bf9\u8c61\u5728\u6574\u6761\u8bed\u53e5\u7ed3\u675f\u65f6\u6790\u6784，"\u556a"\u4e00\u4e0b\u628a\u6512\u597d\u7684\u5b8c\u6574\u65e5\u5fd7\u4ea4\u51fa\u53bb\u3002\u4f60\u53ef\u4ee5\u628a\u5b83\u7406\u89e3\u6210：\u6bcf\u6b21\u5199\u65e5\u5fd7\u90fd\u662f\u9886\u4e86\u4e00\u5f20\u4fbf\u5229\u8d34，\u968f\u624b\u5f80\u4e0a\u8bb0\u5185\u5bb9，\u4e0b\u73ed（\u6790\u6784）\u65f6\u81ea\u52a8\u628a\u4fbf\u5229\u8d34\u8d34\u5230\u516c\u544a\u680f\u4e0a，\u5168\u7a0b\u4e0d\u7528\u4f60\u624b\u52a8\u558a"\u63d0\u4ea4"\u3002<\/p>\n
\n4.3 Mutex.hpp：RAII \u98ce\u683c\u7684\u81ea\u52a8\u9501<\/h4>\n\u4e3a\u4ec0\u4e48\u65e5\u5fd7\u9700\u8981\u9501？<\/span><\/span>\u5982\u679c\u4e24\u4e2a\u7ebf\u7a0b\u540c\u65f6\u6253\u65e5\u5fd7，\u5b83\u4eec\u7684\u5b57\u7b26\u53ef\u80fd\u4f60\u4e00\u4e2a\u6211\u4e00\u4e2a\u5730\u4ea4\u53c9\u5199，\u5c4f\u5e55\u4e0a\u5c31\u4e71\u6210\u7ca5\u4e86\u3002\u6240\u4ee5"\u5199"\u8fd9\u4e2a\u52a8\u4f5c\u5fc5\u987b\u6392\u961f\u3002<\/p>\n\u9879\u76ee\u6ca1\u6709\u76f4\u63a5\u88f8\u7528 pthread \u51fd\u6570，\u800c\u662f\u5148\u5305\u4e00\u5c42 Mutex：<\/p>\n class Mutex
\n{
\npublic:
\n Mutex() { pthread_mutex_init(&_mutex, nullptr); }
\n void Lock() { pthread_mutex_lock(&_mutex); }
\n void Unlock() { pthread_mutex_unlock(&_mutex); }
\n ~Mutex() { pthread_mutex_destroy(&_mutex); }
\nprivate:
\n pthread_mutex_t _mutex;
\n};<\/p>\n \u518d\u914d\u4e00\u4e2a LockGuard：<\/p>\n class LockGuard
\n{
\npublic:
\n LockGuard(Mutex &mutex) : _mutex(mutex) { _mutex.Lock(); }
\n ~LockGuard() { _mutex.Unlock(); }
\nprivate:
\n Mutex &_mutex;
\n};<\/p>\n \u8fd9\u5c31\u662f RAII<\/span><\/span>（\u8d44\u6e90\u83b7\u53d6\u5373\u521d\u59cb\u5316）：\u8fdb\u95e8\u65f6\u6784\u9020\u5bf9\u8c61\u81ea\u52a8\u4e0a\u9501，\u79bb\u5f00\u4f5c\u7528\u57df\u65f6\u5bf9\u8c61\u6790\u6784\u81ea\u52a8\u89e3\u9501\u3002\u54ea\u6015\u4e2d\u95f4 return \u751a\u81f3\u629b\u5f02\u5e38，\u9501\u90fd\u4e0d\u4f1a\u5fd8\u89e3\u2014\u2014\u7f16\u8bd1\u5668\u5e2e\u4f60\u515c\u5e95\u3002\u6210\u5458\u662f\u5f15\u7528 Mutex&，\u8868\u793a\u5b83\u53ea\u662f"\u501f\u7528"\u5916\u9762\u90a3\u628a\u9501，\u81ea\u5df1\u4e0d\u62e5\u6709\u9501\u3002<\/p>\n
\n4.4 \u4e00\u4e2a\u85cf\u5f97\u5f88\u6df1\u7684\u5751：\u65e5\u5fd7\u4e3a\u4ec0\u4e48\u5199\u4e0d\u8fdb\u6587\u4ef6？<\/h4>\n\u8fd9\u4e2a\u9879\u76ee\u91cc\u65e5\u5fd7\u8f93\u51fa\u7528\u7684\u662f：<\/p>\n std::cout << message << gsep << std::flush;<\/p>\n gsep \u662f "\\\\r\\\\n"\u3002\u65b0\u624b\u5bb9\u6613\u5ffd\u7565\u6700\u540e\u90a3\u4e2a std::flush\u3002C++ \u7684\u8f93\u51fa\u662f\u5e26\u7f13\u51b2\u7684：\u5728\u7ec8\u7aef\u91cc\u8dd1\u901a\u5e38\u662f"\u884c\u7f13\u51b2"，\u9047\u5230\u6362\u884c\u8fd8\u80fd\u5237\u51fa\u6765；\u53ef\u4e00\u65e6\u4f60\u628a\u8f93\u51fa\u91cd\u5b9a\u5411\u5230\u6587\u4ef6（.\/udpserver 8080 > log.txt），\u5c31\u53d8\u6210"\u5168\u7f13\u51b2"，\u5185\u5bb9\u4f1a\u5728\u7f13\u51b2\u533a\u91cc\u6512\u7740\u3002\u5b9e\u6d4b\u4e2d\u4e0d\u52a0 flush \u65f6，\u670d\u52a1\u8fdb\u7a0b\u4e00\u76f4\u8dd1\u3001\u65e5\u5fd7\u6587\u4ef6\u5374\u59cb\u7ec8\u662f 0 \u5b57\u8282，\u8fde\u8fdb\u7a0b\u88ab\u6740\u6389\u65e5\u5fd7\u90fd\u6ca1\u843d\u5730\u3002<\/p>\n std::flush \u7684\u4f5c\u7528\u5c31\u662f\u624b\u52a8\u6309\u4e0b"\u7acb\u523b\u9001\u51fa"\u3002\u8981\u4e48 flush，\u8981\u4e48\u7528\u81ea\u5e26\u5237\u65b0\u529f\u80fd\u7684 std::endl（\u5b83\u7b49\u4e8e\u6362\u884c + flush，\u4f46\u9891\u7e41 flush \u6709\u6027\u80fd\u5f00\u9500，\u6b63\u5f0f\u9879\u76ee\u8981\u6743\u8861）\u3002<\/p>\n
\n\u4e94\u3001\u6784\u5efa\u6a21\u5757：Makefile \u8fd9\u4e2a\u5c0f\u7ba1\u5bb6<\/h3>\n.PHONY:all
\nall:udpclient udpserver<\/p>\n udpclient:UdpClient.cc
\ng++ -o $@ $^ -std=c++17 -pthread
\nudpserver:UdpServer.cc
\ng++ -o $@ $^ -std=c++17 -pthread<\/p>\n .PHONY:clean
\nclean:
\nrm -f udpclient udpserver<\/p>\n \u51e0\u4e2a\u5c0f\u767d\u77e5\u8bc6\u70b9：<\/p>\n \n- \n
Makefile \u91cc\u7f29\u8fdb\u5fc5\u987b\u662f Tab，\u4e0d\u80fd\u662f\u7a7a\u683c<\/span><\/span>，\u8fd9\u662f\u65b0\u624b\u7b2c\u4e00\u5929\u5fc5\u8e29\u7684\u5751；<\/p>\n<\/li>\n- \n
$@ \u4ee3\u8868\u5192\u53f7\u5de6\u8fb9\u7684\u76ee\u6807\u540d，$^ \u4ee3\u8868\u53f3\u8fb9\u6240\u6709\u4f9d\u8d56，\u4e24\u6761\u89c4\u5219\u5c55\u5f00\u540e\u5c31\u662f\u5b8c\u6574\u7684 g++ \u547d\u4ee4；<\/p>\n<\/li>\n - \n
-std=c++17 \u4e0d\u80fd\u7701，\u4ee3\u7801\u7528\u4e86 std::filesystem；<\/p>\n<\/li>\n - \n
-pthread \u544a\u8bc9\u7f16\u8bd1\u5668\u542f\u7528 pthread \u652f\u6301（\u4e92\u65a5\u9501\u8981\u7528）；<\/p>\n<\/li>\n - \n
.PHONY \u58f0\u660e all\u3001clean \u662f"\u4f2a\u76ee\u6807"，\u610f\u601d\u662f\u5b83\u4eec\u4e0d\u662f\u771f\u5b9e\u6587\u4ef6\u540d，\u54ea\u6015\u76ee\u5f55\u91cc\u6070\u597d\u6709\u4e2a\u53eb clean \u7684\u6587\u4ef6，make clean \u4e5f\u7167\u5e38\u6267\u884c\u3002<\/p>\n<\/li>\n<\/ul>\n
\n\u516d\u3001\u8e29\u5751\u5c0f\u7ed3：\u8fd9\u4e9b\u96f7\u6211\u4eec\u90fd\u66ff\u4f60\u8d9f\u8fc7\u4e86<\/h3>\n\u628a\u5f00\u53d1\u4e2d\u771f\u5b9e\u9047\u5230\u7684\u95ee\u9898\u6c47\u603b\u6210\u4e00\u5f20\u6025\u6551\u8868：<\/p>\n \n\n\n\u73b0\u8c61<\/p>\n \u6839\u56e0<\/p>\n \u89e3\u6cd5<\/p>\n<\/tr>\n \n| \n \u670d\u52a1\u5668\u62a5 bind error<\/p>\n<\/td>\n | \n \u7aef\u53e3\u88ab\u4e0a\u6b21\u6ca1\u5173\u7684\u8fdb\u7a0b\u5360\u7740<\/p>\n<\/td>\n | \n ss -ulnp | grep \u7aef\u53e3 \u627e\u5230 PID，kill \u6389<\/p>\n<\/td>\n<\/tr>\n | \n| \n bash: .\/udpserver: No such file<\/p>\n<\/td>\n | \n \u8fd8\u6ca1\u7f16\u8bd1，\u6216\u521a make clean \u8fc7<\/p>\n<\/td>\n | \n \u5148 make<\/p>\n<\/td>\n<\/tr>\n | \n| \n \u6572 make \u53cd\u800c\u5220\u6587\u4ef6<\/p>\n<\/td>\n | \n Makefile \u7b2c\u4e00\u4e2a\u76ee\u6807\u662f clean<\/p>\n<\/td>\n | \n \u628a all \u653e\u5230\u7b2c\u4e00\u884c<\/p>\n<\/td>\n<\/tr>\n | \n| \n \u5ba2\u6237\u7aef\u6309\u56de\u8f66\u540e\u6c38\u4e45\u5361\u6b7b<\/p>\n<\/td>\n | \n \u53d1\u51fa 0 \u5b57\u8282\u5305，\u670d\u52a1\u5668\u4e0d\u56de\u590d<\/p>\n<\/td>\n | \n \u7a7a\u884c continue \u8df3\u8fc7<\/p>\n<\/td>\n<\/tr>\n | \n| \n Ctrl+D \u540e\u75af\u72c2\u5237\u5c4f<\/p>\n<\/td>\n | \n \u6ca1\u68c0\u67e5 getline \u8fd4\u56de\u503c<\/p>\n<\/td>\n | \n \u5931\u8d25\u65f6 break<\/p>\n<\/td>\n<\/tr>\n | \n| \n \u5355\u8bcd\u540e\u9762\u8ddf\u4e71\u7801<\/p>\n<\/td>\n | \n UDP \u6570\u636e\u4e0d\u5e26 '\\\\0'<\/p>\n<\/td>\n | \n buffer[s] = 0<\/p>\n<\/td>\n<\/tr>\n | \n| \n \u91cd\u5b9a\u5411\u540e\u65e5\u5fd7\u6587\u4ef6\u662f\u7a7a\u7684<\/p>\n<\/td>\n | \n \u8f93\u51fa\u7f13\u51b2\u6ca1\u5237<\/p>\n<\/td>\n | \n << std::flush<\/p>\n<\/td>\n<\/tr>\n | \n| \n \u6539\u4e86 hpp \u8fd0\u884c\u6ca1\u53d8\u5316<\/p>\n<\/td>\n | \n make \u4e0d\u8ffd\u8e2a\u5934\u6587\u4ef6\u4f9d\u8d56<\/p>\n<\/td>\n | \n make clean && make<\/p>\n<\/td>\n<\/tr>\n | \n| \n \u7528 127.0.0.1 \u80fd\u901a\u3001\u6362 IP \u4e0d\u901a<\/p>\n<\/td>\n | \n bind \u5199\u6b7b\u4e86\u5355\u4e2a IP<\/p>\n<\/td>\n | \n \u7528 INADDR_ANY<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\u4e03\u3001\u77e5\u8bc6\u56fe\u8c31：\u628a\u8fd9\u4e00\u8bfe\u88c5\u8fdb\u8111\u5b50<\/h3>\n\u6700\u540e\u7528\u4e00\u5f20\u56fe\u6536\u4e2a\u5c3e\u3002\u522b\u770b\u4ee3\u7801\u4e0d\u5c11，\u9aa8\u67b6\u5176\u5b9e\u975e\u5e38\u6e05\u6670：<\/p>\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
\n \u2502 UdpServer.cc（\u5e97\u957f） \u2502
\n \u2502 \u89e3\u6790\u7aef\u53e3 \u2192 \u52a0\u8f7d\u8bcd\u5178 \u2192 \u7ec4\u88c5\u670d\u52a1\u5668 \u2192 \u542f\u52a8 \u2502
\n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
\n \u2502 \u6301\u6709
\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
\n \u2502 UdpServer.hpp（\u524d\u53f0） \u2502
\n \u2502 socket \u2192 bind \u2192 recvfrom \u2192 sendto \u2502
\n \u2502 \u81ea\u5df1\u4e0d\u61c2\u4e1a\u52a1，\u53ea\u8d1f\u8d23\u6536\u53d1\u548c\u8c03\u7528\u56de\u8c03 \u2502
\n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
\n std::function \u56de\u8c03\u2502 \u2502 \u4f7f\u7528
\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
\n \u2502 Dict.hpp \u2502 \u2502 InetAddr.hpp \u2502
\n \u2502 unordered_map \u2502 \u2502 ntohs\/inet_ntoa\u2502
\n \u2502 \u82f1\u8bd1\u6c49\u4e1a\u52a1 \u2502 \u2502 \u5c01\u88c5\u5ba2\u6237\u7aef\u5730\u5740 \u2502
\n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
\n \u2502 \u8bfb\u53d6
\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
\n \u2502 dictionary.txt \u2502
\n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n \u6a2a\u5207\u5173\u6ce8\u70b9（\u8c01\u90fd\u80fd\u7528）：
\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u5185\u90e8\u52a0\u9501 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
\n \u2502 Log.hpp \u2502 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u25b6 \u2502 Mutex.hpp \u2502
\n \u2502 \u7b56\u7565\u6a21\u5f0f+\u6d41\u5f0f\u65e5\u5fd7\u2502 \u2502 RAII LockGuard\u2502
\n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n \u5de5\u7a0b\u5316：Makefile（all \/ clean，g++ -std=c++17 -pthread）
\n \u5bf9\u7aef：UdpClient.cc（socket \u4e0d bind，sendto \u540e recvfrom \u7b49\u56de\u4fe1）<\/p>\n \u9700\u8981\u5728\u8111\u5b50\u91cc\u5efa\u7acb\u7684\u51e0\u6761\u4e3b\u7ebf：<\/p>\n - \n
\u7f51\u7edc\u56db\u677f\u65a7<\/span><\/span>：UDP \u670d\u52a1\u5668\u5c31\u662f socket \u2192 bind \u2192 \u5faa\u73af(recvfrom\/sendto)；UDP \u4fdd\u7559\u62a5\u6587\u8fb9\u754c（\u65e0\u7c98\u5305）\u3001\u4e0d\u53ef\u9760\u3001\u4e0d\u8fde\u63a5，\u9002\u5408\u8fd9\u79cd\u4e00\u95ee\u4e00\u7b54\u7684\u5c0f\u573a\u666f\u3002<\/p>\n<\/li>\n- \n
\u5730\u5740\u4e09\u8981\u7d20<\/span><\/span>：sockaddr_in \u586b family\u3001port（htons）\u3001addr（INADDR_ANY \u6216 inet_addr）；\u670d\u52a1\u5668\u56fa\u5b9a bind，\u5ba2\u6237\u7aef\u8ba9 OS \u81ea\u52a8\u5206\u914d\u3002<\/p>\n<\/li>\n- \n
\u6570\u636e\u5b89\u5168\u610f\u8bc6<\/span><\/span>：\u6536\u5230\u7684\u6570\u636e\u624b\u52a8\u8865 '\\\\0'，\u6536\u5305\u957f\u5ea6\u7559\u4e00\u683c；\u7a7a\u8f93\u5165\u3001EOF \u90fd\u8981\u9632\u3002<\/p>\n<\/li>\n- \n
\u8bbe\u8ba1\u601d\u60f3<\/span>：<\/span><\/span>\u56de\u8c03\/std::function \u8ba9\u7f51\u7edc\u6846\u67b6\u4e0e\u4e1a\u52a1\u89e3\u8026；\u7b56\u7565\u6a21\u5f0f\u8ba9\u65e5\u5fd7\u8f93\u51fa\u65b9\u5f0f\u53ef\u66ff\u6362；RAII \u8ba9\u8d44\u6e90（\u9501）\u81ea\u52a8\u91ca\u653e\u3002<\/p>\n<\/li>\n- \n
\u5de5\u7a0b\u7d20\u517b<\/span><\/span>：\u65e5\u5fd7\u516d\u8981\u7d20 + flush；Makefile \u9ed8\u8ba4\u76ee\u6807\u3001Tab \u7f29\u8fdb\u3001\u5934\u6587\u4ef6\u4f9d\u8d56；\u7aef\u53e3\u5360\u7528\u600e\u4e48\u67e5\u600e\u4e48\u6740\u3002<\/p>\n<\/li>\n
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