![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260114094137-696764d1b35a0.png\")
<\/p>\n\u5305\u542b DNS \u89e3\u6790\u3001TCP \u8fde\u63a5\u3001HTTP \u6536\u53d1\u3001\u8fde\u63a5\u7ba1\u7406 4 \u4e2a\u6838\u5fc3\u73af\u8282，\u6211\u5206\u6b65\u9aa4\u62c6\u89e3（\u6e05\u6670\u5230\u6bcf\u4e00\u6b65）：<\/p>\n
<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260114094137-696764d1d3b29.png\")
<\/p>\n
GET http:\/\/www.baidu.com\/index.html HTTP\/1.0 \u2192 \u8bf7\u6c42\u884c
\nUser-Agent: Wget\/1.12 (linux-gnu) \u2192 \u8bf7\u6c42\u59341
\nHost: www.baidu.com \u2192 \u8bf7\u6c42\u59342
\nConnection: close \u2192 \u8bf7\u6c42\u59343 <\/p>\n
\u2460\u8bf7\u6c42\u884c（\u7b2c 1 \u884c，HTTP \u8bf7\u6c42\u7684\u6838\u5fc3\u6307\u4ee4）<\/p>\n
\u8bf7\u6c42\u884c\u7531 \u300c\u8bf7\u6c42\u65b9\u6cd5\u300d+\u300c\u8bf7\u6c42 URL\u300d+\u300c\u534f\u8bae\u7248\u672c\u300d \u4e09\u90e8\u5206\u7ec4\u6210，\u6bcf\u90e8\u5206\u90fd\u6709\u660e\u786e\u4f5c\u7528：<\/p>\n
\u2461\u8bf7\u6c42\u5934（\u7b2c 2-4 \u884c，\u4f20\u9012\u9644\u52a0\u4fe1\u606f）<\/p>\n
\u8bf7\u6c42\u5934\u662f \u201c\u952e\u503c\u5bf9\u201d \u683c\u5f0f（\u952e: \u503c），\u7528\u6765\u544a\u8bc9\u670d\u52a1\u5668\u8bf7\u6c42\u7684\u9644\u52a0\u4fe1\u606f，\u56fe\u4e2d\u8fd9\u51e0\u4e2a\u5934\u662f\u9ad8\u9891\u5fc5\u77e5\u7684：<\/p>\n
\u2462\u8865\u5145：GET \u8bf7\u6c42\u7684\u7279\u70b9（\u7ed3\u5408\u793a\u4f8b）<\/p>\n
\u56fe\u4e2d\u662fGET\u8bf7\u6c42，\u5b83\u7684\u6838\u5fc3\u7279\u70b9\u662f：<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260114094138-696764d227979.png\")
<\/p>\n
\u4e00\u3001\u72b6\u6001\u884c（\u7b2c 1 \u884c）<\/p>\n
HTTP\/1.0 200 OK<\/p>\n
\u4e8c\u3001\u54cd\u5e94\u5934（\u7b2c 2-6 \u884c，\u670d\u52a1\u5668\u8fd4\u56de\u7684\u9644\u52a0\u4fe1\u606f）<\/p>\n
HTTP \u5e94\u7b54\u62a5\u6587\u4e2d\u7684\u300c\u72b6\u6001\u7801\u5206\u7c7b\u4e0e\u542b\u4e49\u300d<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260114094138-696764d23326b.png\")
<\/p>\n
\u6d4f\u89c8\u5668\u901a\u8fc7DNS \u89e3\u6790\u57df\u540d\u2192TCP \u4e09\u6b21\u63e1\u624b\u5efa\u8fde\u2192\u53d1 HTTP \u8bf7\u6c42\u2192\u6536 HTTP \u54cd\u5e94\u2192\u6839\u636e\u77ed \/ \u957f\u8fde\u63a5\u7b56\u7565\u7ba1\u7406 TCP \u8fde\u63a5，\u5b8c\u6210\u4e00\u6b21 Web \u8d44\u6e90\u7684\u8bbf\u95ee\u3002<\/p>\n<\/p>\n
\u6211\u4eec\u73b0\u5728\u5199：\u4e00\u4e2atcp\u7684\u670d\u52a1\u5668\u7aef，\u4ed6\u7684\u4e1a\u52a1\u65f6\u548c\u6d4f\u89c8\u5668（\u5ba2\u6237\u7aef）\u8fdb\u884c\u901a\u4fe1，\u6240\u4ee5\u4e0d\u7528\u5199\u5ba2\u6237\u7aef \u53ea\u7528\u5427\u670d\u52a1\u5668\u7aef\u5199\u597d\u3002<\/p>\n
#include <stdio.h>
\n#include <stdlib.h>
\n#include <string.h>
\n#include <unistd.h>
\n#include <sys\/socket.h>
\n#include <netinet\/in.h>
\n#include <arpa\/inet.h>
\n#include <pthread.h><\/p>\n
\/\/ 1. \u670d\u52a1\u5668\u521d\u59cb\u5316\u51fd\u6570：\u521b\u5efa\u5957\u63a5\u5b57+\u7ed1\u5b9a+\u76d1\u542c
\nint socket_init()
\n{
\n \/\/ \u521b\u5efaTCP\u5957\u63a5\u5b57
\n int sockfd = socket(AF_INET, SOCK_STREAM, 0);
\n if (sockfd == -1)
\n {
\n return -1;
\n }<\/p>\n
\/\/ \u914d\u7f6e\u670d\u52a1\u5668\u5730\u5740（IP:127.0.0.1，\u7aef\u53e3:80）
\n struct sockaddr_in saddr;
\n memset(&saddr, 0, sizeof(saddr));
\n saddr.sin_family = AF_INET;
\n saddr.sin_port = htons(80);
\n saddr.sin_addr.s_addr = inet_addr("127.0.0.1");<\/p>\n
\/\/ \u7ed1\u5b9a\u5730\u5740
\n int res = bind(sockfd, (struct sockaddr*)&saddr, sizeof(saddr));
\n if (res == -1)
\n {
\n printf("bind err\\\\n");
\n return -1;
\n }<\/p>\n
\/\/ \u76d1\u542c（\u961f\u5217\u957f\u5ea65）
\n if(listen(sockfd,5) == -1 )
\n {
\n return -1;
\n }<\/p>\n
return sockfd;
\n}<\/p>\n
\/\/ 2. \u7ebf\u7a0b\u5904\u7406\u51fd\u6570：\u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1
\nvoid* thread_fun(void* arg)
\n{
\n \/\/ \u63a5\u6536\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u63cf\u8ff0\u7b26
\n int *p = (int*)arg;
\n int c = *p;
\n free(p); \/\/ \u91ca\u653e\u52a8\u6001\u5206\u914d\u7684\u5185\u5b58<\/p>\n
char buff[1024] = {0};
\n \/\/ \u63a5\u6536\u5ba2\u6237\u7aef\u6570\u636e
\n int n = recv(c, buff, 1023, 0);
\n if (n <= 0)
\n {
\n close(c);
\n pthread_exit(NULL); \/\/ \u7ebf\u7a0b\u9000\u51fa
\n }<\/p>\n
printf("buff=%s\\\\n", buff);
\n send(c, "OK", 2, 0); \/\/ \u56de\u590d\u5ba2\u6237\u7aef
\n close(c);
\n return NULL;
\n}<\/p>\n
\/\/ 3. \u4e3b\u51fd\u6570：\u63a5\u6536\u8fde\u63a5+\u521b\u5efa\u7ebf\u7a0b
\nint main()
\n{
\n int sockfd = socket_init();
\n if (sockfd == -1)
\n {
\n exit(1);
\n }<\/p>\n
while(1)
\n {
\n \/\/ \u63a5\u6536\u5ba2\u6237\u7aef\u8fde\u63a5，\u5f97\u5230\u5ba2\u6237\u7aef\u5957\u63a5\u5b57c
\n int c = accept(sockfd, NULL, NULL);
\n if (c < 0)
\n {
\n continue;
\n }<\/p>\n
\/\/ \u52a8\u6001\u5206\u914d\u5185\u5b58\u5b58c（\u907f\u514d\u7ebf\u7a0b\u95f4\u5171\u4eab\u6808\u53d8\u91cf）
\n int *p = (int*)malloc(sizeof(int));
\n *p = c;
\n \/\/ \u521b\u5efa\u7ebf\u7a0b，\u6267\u884cthread_fun\u5904\u7406\u8be5\u5ba2\u6237\u7aef
\n pthread_t tid;
\n pthread_create(&tid, NULL, thread_fun, (void*)p);
\n }<\/p>\n
exit(1);
\n} <\/p>\n
\u6838\u5fc3\u903b\u8f91\u8bb2\u89e3<\/p>\n
socket_init()：\u670d\u52a1\u5668\u521d\u59cb\u5316<\/p>\n
main()：\u4e3b\u7ebf\u7a0b\u63a5\u6536\u8fde\u63a5 + \u521b\u5efa\u5de5\u4f5c\u7ebf\u7a0b<\/p>\n
thread_fun()：\u5de5\u4f5c\u7ebf\u7a0b\u5904\u7406\u5ba2\u6237\u7aef\u901a\u4fe1<\/p>\n
\u591a\u7ebf\u7a0b\u5e76\u53d1\u7684\u7279\u70b9<\/p>\n
\u6d4b\u8bd5<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260114094138-696764d26c59c.png\")
<\/p>\n
\u2460\u6d4b\u8bd5\u51c6\u5907（\u7ec8\u7aef\u64cd\u4f5c）<\/p>\n
\u2461\u901a\u4fe1\u6d4b\u8bd5（\u6d4f\u89c8\u5668 + \u670d\u52a1\u5668\u4ea4\u4e92）<\/p>\n
\u2462\u6838\u5fc3\u9a8c\u8bc1\u70b9<\/p>\n
\u89e3\u6790\u6a21\u5757：<\/p>\n
\u89e3\u6790\u62ff\u51fa\u8bf7\u6c42\u65b9\u6cd5<\/p>\n
#include <stdio.h>
\n#include <stdlib.h>
\n#include <string.h>
\n#include <unistd.h>
\n#include <sys\/socket.h>
\n#include <netinet\/in.h>
\n#include <arpa\/inet.h>
\n#include <pthread.h>
\n#include <fcntl.h>
\n#include <sys\/stat.h><\/p>\n
\/\/ \u4f60\u7684\u4ee3\u7801\u91cc\u5b9a\u4e49\u7684\u6587\u4ef6\u6839\u76ee\u5f55，\u548c\u622a\u56fe\u4e00\u81f4
\n#define PATH "\/home\/stu\/c2305\/day22"<\/p>\n
\/\/ \u89e3\u6790HTTP\u8bf7\u6c42\u884c，\u63d0\u53d6\u8bf7\u6c42\u7684\u6587\u4ef6\u540d \u5982 GET \/index.html HTTP\/1.1 -> \/index.html
\nchar* get_filename(char buff[])
\n{
\n char* ptr = NULL;
\n char* s = strtok_r(buff, " ", &ptr); \/\/ \u5206\u5272\u51faGET\/POST
\n if(s == NULL)
\n {
\n return NULL;
\n }
\n s = strtok_r(NULL, " ", &ptr); \/\/ \u5206\u5272\u51fa\u8bf7\u6c42\u7684\u6587\u4ef6\u8def\u5f84
\n return s;
\n}<\/p>\n
\/\/ \u670d\u52a1\u5668\u521d\u59cb\u5316：\u521b\u5efasocket\u3001\u7ed1\u5b9a\u3001\u76d1\u542c
\nint socket_init()
\n{
\n int sockfd = socket(AF_INET,SOCK_STREAM,0);
\n if(sockfd == -1)
\n {
\n perror("socket err");
\n return -1;
\n }<\/p>\n
struct sockaddr_in saddr;
\n memset(&saddr,0,sizeof(saddr));
\n saddr.sin_family = AF_INET;
\n saddr.sin_port = htons(80); \/\/ HTTP\u9ed8\u8ba480\u7aef\u53e3
\n saddr.sin_addr.s_addr = inet_addr("127.0.0.1");<\/p>\n
int res = bind(sockfd,(struct sockaddr*)&saddr,sizeof(saddr));
\n if(res == -1)
\n {
\n perror("bind err");
\n return -1;
\n }<\/p>\n
if(listen(sockfd,5) == -1)
\n {
\n perror("listen err");
\n return -1;
\n }
\n return sockfd;
\n}<\/p>\n
\/\/ \u7ebf\u7a0b\u5904\u7406\u51fd\u6570：\u5904\u7406\u5ba2\u6237\u7aefHTTP\u8bf7\u6c42+\u8fd4\u56de\u6587\u4ef6
\nvoid* thread_fun(void* arg)
\n{
\n int c = *(int*)arg;
\n free(arg); \/\/ \u91ca\u653emalloc\u7684\u5806\u5185\u5b58<\/p>\n
char buff[1024] = {0};
\n int n = recv(c,buff,1023,0);
\n if(n <= 0)
\n {
\n close(c);
\n pthread_exit(NULL);
\n }
\n printf("\u6536\u5230\u5ba2\u6237\u7aef\u8bf7\u6c42:\\\\n%s\\\\n",buff);<\/p>\n
\/\/ 1. \u89e3\u6790\u8bf7\u6c42\u7684\u6587\u4ef6\u540d
\n char* filename = get_filename(buff);
\n if(filename == NULL)
\n {
\n close(c);
\n pthread_exit(NULL);
\n }<\/p>\n
\/\/ 2. \u62fc\u63a5\u5b8c\u6574\u6587\u4ef6\u8def\u5f84
\n char file_path[256] = {0};
\n strcpy(file_path,PATH);
\n \/\/ \u5982\u679c\u8bbf\u95ee\u6839\u76ee\u5f55 \/ ，\u9ed8\u8ba4\u6253\u5f00index.html
\n if(strcmp(filename,"\/") == 0)
\n {
\n strcat(file_path,"\/index.html");
\n }
\n else
\n {
\n strcat(file_path,filename);
\n }
\n printf("\u8981\u6253\u5f00\u7684\u6587\u4ef6\u8def\u5f84: %s\\\\n",file_path);<\/p>\n
\/\/ 3. \u4ee5\u53ea\u8bfb\u65b9\u5f0f\u6253\u5f00\u6587\u4ef6
\n int fd = open(file_path,O_RDONLY);
\n if(fd == -1)
\n {
\n \/\/ \u6587\u4ef6\u6253\u5f00\u5931\u8d25，\u8fd4\u56deHTTP 404\u54cd\u5e94
\n char err_msg[512] = "HTTP\/1.1 404 Not Found\\\\r\\\\nContent-Type:text\/html;charset=utf-8\\\\r\\\\n\\\\r\\\\n<html><head><meta charset='utf-8'><\/head><body><h1>404 \u9875\u9762\u4e0d\u5b58\u5728<\/h1><\/body><\/html>";
\n send(c,err_msg,strlen(err_msg),0);
\n close(c);
\n pthread_exit(NULL);
\n }<\/p>\n
\/\/ 4. \u83b7\u53d6\u6587\u4ef6\u5927\u5c0f
\n struct stat st;
\n fstat(fd,&st);
\n int file_size = st.st_size;<\/p>\n
\/\/ 5. \u62fc\u63a5HTTP 200\u6210\u529f\u54cd\u5e94\u5934
\n char head_msg[512] = {0};
\n sprintf(head_msg,"HTTP\/1.1 200 OK\\\\r\\\\nContent-Length:%d\\\\r\\\\nContent-Type:text\/html;charset=utf-8\\\\r\\\\n\\\\r\\\\n",file_size);
\n send(c,head_msg,strlen(head_msg),0);<\/p>\n
\/\/ 6. \u5faa\u73af\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u5e76\u53d1\u9001\u7ed9\u6d4f\u89c8\u5668
\n char file_buff[1024] = {0};
\n int read_len = 0;
\n while((read_len = read(fd,file_buff,1024)) > 0)
\n {
\n send(c,file_buff,read_len,0);
\n memset(file_buff,0,sizeof(file_buff));
\n }<\/p>\n
\/\/ \u6536\u5c3e：\u5173\u95ed\u6587\u4ef6\u3001\u5173\u95ed\u5ba2\u6237\u7aef\u5957\u63a5\u5b57
\n close(fd);
\n close(c);
\n pthread_exit(NULL);
\n}<\/p>\n
int main()
\n{
\n int sockfd = socket_init();
\n if(sockfd == -1)
\n {
\n exit(1);
\n }
\n printf("HTTP\u670d\u52a1\u5668\u542f\u52a8\u6210\u529f，\u76d1\u542c 127.0.0.1:80 …\\\\n");<\/p>\n
pthread_attr_t attr;
\n pthread_attr_init(&attr);
\n \/\/ \u8bbe\u7f6e\u7ebf\u7a0b\u5206\u79bb\u5c5e\u6027：\u7ebf\u7a0b\u9000\u51fa\u540e\u81ea\u52a8\u91ca\u653e\u8d44\u6e90，\u89e3\u51b3\u5185\u5b58\u6cc4\u6f0f！
\n pthread_attr_setdetachstate(&attr,PTHREAD_CREATE_DETACHED);<\/p>\n
while(1)
\n {
\n int c = accept(sockfd,NULL,NULL);
\n if(c < 0)
\n {
\n continue;
\n }
\n printf("\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u6210\u529f！\\\\n");<\/p>\n
int* p = (int*)malloc(sizeof(int));
\n *p = c;
\n pthread_t tid;
\n \/\/ \u521b\u5efa\u5206\u79bb\u5c5e\u6027\u7684\u7ebf\u7a0b
\n pthread_create(&tid,&attr,thread_fun,(void*)p);
\n }
\n pthread_attr_destroy(&attr);
\n close(sockfd);
\n exit(0);
\n} <\/p>\n
\u539f\u4ee3\u7801\u53ea\u662f\u63a5\u6536\u8bf7\u6c42\u540e\u56de\u590d \u201cOK\u201d，\u8fd9\u6bb5\u4ee3\u7801\u65b0\u589e\u4e86HTTP \u8bf7\u6c42\u89e3\u6790 + \u6587\u4ef6\u8def\u5f84\u62fc\u63a5\u7684\u903b\u8f91，\u76ee\u6807\u662f：\u6d4f\u89c8\u5668\u8bbf\u95ee127.0.0.1\/index.html \u2192 \u670d\u52a1\u5668\u89e3\u6790\u51fa\u8bf7\u6c42\u7684\u6587\u4ef6\u662f\/index.html \u2192 \u62fc\u63a5\u672c\u5730\u8def\u5f84\/home\/stu\/c2305\/day22\/index.html \u2192 \u8bfb\u53d6\u8be5\u6587\u4ef6\u5e76\u8fd4\u56de\u7ed9\u6d4f\u89c8\u5668\u3002<\/p>\n
\u4f5c\u7528：\u4ece\u6d4f\u89c8\u5668\u53d1\u9001\u7684 HTTP \u8bf7\u6c42（\u5b58\u5728buff\u4e2d）\u91cc，\u63d0\u53d6\u8981\u8bbf\u95ee\u7684\u6587\u4ef6\u8def\u5f84（\u6bd4\u5982\u4eceGET \/index.html HTTP\/1.1\u4e2d\u63d0\u53d6\/index.html）<\/p>\n
char* get_filename(char buff[])
\n{
\n char* ptr = NULL;
\n \/\/ \u7b2c\u4e00\u6b65：\u7528\u7a7a\u683c\u5206\u5272\u8bf7\u6c42\u884c，\u62ff\u5230\u7b2c\u4e00\u4e2a\u5b57\u6bb5（\u8bf7\u6c42\u65b9\u6cd5，\u6bd4\u5982GET）
\n char* s = strtok_r(buff, " ", &ptr);
\n if (s == NULL) { return NULL; }
\n printf("\u8bf7\u6c42\u65b9\u6cd5: %s\\\\n", s);<\/p>\n
\/\/ \u7b2c\u4e8c\u6b65：\u5206\u5272\u5f97\u5230\u7b2c\u4e8c\u4e2a\u5b57\u6bb5（\u6587\u4ef6\u8def\u5f84，\u6bd4\u5982\/index.html）
\n s = strtok_r(NULL, " ", &ptr);
\n return s; \/\/ \u8fd4\u56de\u89e3\u6790\u51fa\u7684\u6587\u4ef6\u8def\u5f84
\n}<\/p>\n
\u5728\u539f \u201c\u63a5\u6536\u8bf7\u6c42\u201d \u540e，\u65b0\u589e\u4e86\u89e3\u6790\u8def\u5f84\u3001\u62fc\u63a5\u672c\u5730\u76ee\u5f55\u7684\u6b65\u9aa4：<\/p>\n
\/\/ 1. \u89e3\u6790HTTP\u8bf7\u6c42\u4e2d\u7684\u6587\u4ef6\u8def\u5f84
\nchar* filename = get_filename(buff);
\nif (filename == NULL ) { break; }<\/p>\n
\/\/ 2. \u62fc\u63a5\u672c\u5730\u6587\u4ef6\u7684\u5b8c\u6574\u8def\u5f84
\nchar path[256] = {PATH}; \/\/ PATH\u662f\u5b8f\u5b9a\u4e49\u7684\u672c\u5730\u76ee\u5f55：\/home\/stu\/c2305\/day22
\n\/\/ \u5904\u7406\u6839\u8def\u5f84\u8bf7\u6c42（\u6bd4\u5982\u6d4f\u89c8\u5668\u8bbf\u95ee127.0.0.1，filename\u662f"\/"）
\nif ( strcmp(filename,"\/") == 0 )
\n{
\n filename = "\/index.html"; \/\/ \u9ed8\u8ba4\u8fd4\u56deindex.html
\n}
\nstrcat(path,filename); \/\/ \u62fc\u63a5\u6210\u5b8c\u6574\u8def\u5f84：\u6bd4\u5982\/home\/stu\/c2305\/day22\/index.html
\nprintf("path:%s\\\\n",path);<\/p>\n
#include <stdio.h>
\n#include <stdlib.h>
\n#include <string.h>
\n#include <unistd.h>
\n#include <sys\/socket.h> \/\/ \u7f51\u7edc\u5957\u63a5\u5b57\u6838\u5fc3\u5934\u6587\u4ef6 socket\/bind\/listen\/accept\/recv\/send
\n#include <netinet\/in.h> \/\/ \u7f51\u7edc\u5730\u5740\u7ed3\u6784\u4f53 sockaddr_in \u7f51\u7edc\u5b57\u8282\u5e8f\u8f6c\u6362\u51fd\u6570
\n#include <arpa\/inet.h> \/\/ \u5730\u5740\u8f6c\u6362\u76f8\u5173\u51fd\u6570
\n#include <pthread.h> \/\/ \u7ebf\u7a0b\u5e93\u5934\u6587\u4ef6 pthread_create\/pthread_exit
\n#include <fcntl.h> \/\/ \u6587\u4ef6\u6253\u5f00 open \u51fd\u6570\u5934\u6587\u4ef6
\n#include <sys\/types.h> \/\/ \u7cfb\u7edf\u7c7b\u578b\u5b9a\u4e49<\/p>\n
\/\/ \u670d\u52a1\u5668\u5b58\u653e\u7f51\u9875\u6587\u4ef6\u7684\u6839\u76ee\u5f55，\u548c\u4f60\u7684\u622a\u56fe\u4e00\u81f4，\u4e0d\u8981\u4fee\u6539
\n#define PATH "\/home\/stu\/c2305\/day22"<\/p>\n
\/**************************************************************************
\n\u51fd\u6570\u540d：get_filename
\n\u51fd\u6570\u529f\u80fd：\u89e3\u6790\u6d4f\u89c8\u5668\u53d1\u9001\u7684HTTP\u8bf7\u6c42\u62a5\u6587，\u63d0\u53d6\u8bf7\u6c42\u7684\u6587\u4ef6\u8def\u5f84
\n\u53c2\u6570：buff \u63a5\u6536\u5ba2\u6237\u7aef\u8bf7\u6c42\u6570\u636e\u7684\u7f13\u51b2\u533a
\n\u8fd4\u56de\u503c：\u6210\u529f\u8fd4\u56de\u8bf7\u6c42\u7684\u6587\u4ef6\u8def\u5f84 \u5982:\/index.html \u5931\u8d25\u8fd4\u56deNULL
\n**************************************************************************\/
\nchar* get_filename(char buff[])
\n{
\n char* ptr = NULL;
\n \/\/ \u7b2c\u4e00\u6b21\u5206\u5272，\u83b7\u53d6\u8bf7\u6c42\u65b9\u6cd5 GET\/POST
\n char* s = strtok_r(buff, " ", &ptr);
\n if(s == NULL) \/\/ \u5206\u5272\u5931\u8d25，\u8fd4\u56deNULL
\n {
\n return NULL;
\n }
\n \/\/ \u7b2c\u4e8c\u6b21\u5206\u5272，\u83b7\u53d6\u8bf7\u6c42\u7684\u6587\u4ef6\u8def\u5f84 \u6838\u5fc3\u63d0\u53d6\u903b\u8f91
\n s = strtok_r(NULL, " ", &ptr);
\n return s;
\n}<\/p>\n
\/**************************************************************************
\n\u51fd\u6570\u540d：socket_init
\n\u51fd\u6570\u529f\u80fd：TCP\u670d\u52a1\u5668\u521d\u59cb\u5316\u6838\u5fc3\u51fd\u6570，\u5b8c\u6210 \u521b\u5efa\u5957\u63a5\u5b57-\u7ed1\u5b9a\u7aef\u53e3-\u5f00\u542f\u76d1\u542c \u4e09\u6b65\u64cd\u4f5c
\n\u8fd4\u56de\u503c：\u6210\u529f\u8fd4\u56de\u76d1\u542c\u5957\u63a5\u5b57\u63cf\u8ff0\u7b26 \u5931\u8d25\u8fd4\u56de-1
\n**************************************************************************\/
\nint socket_init()
\n{
\n \/\/ \u521b\u5efaTCP\u6d41\u5f0f\u5957\u63a5\u5b57 AF_INET:IPv4\u534f\u8bae SOCK_STREAM:TCP\u534f\u8bae 0:\u9ed8\u8ba4
\n int sockfd = socket(AF_INET,SOCK_STREAM,0);
\n if(sockfd == -1)
\n {
\n printf("socket err\\\\n");
\n return -1;
\n }<\/p>\n
\/\/ \u521d\u59cb\u5316\u670d\u52a1\u5668\u5730\u5740\u7ed3\u6784\u4f53
\n struct sockaddr_in saddr;
\n memset(&saddr,0,sizeof(saddr)); \/\/ \u6e05\u7a7a\u7ed3\u6784\u4f53\u5783\u573e\u503c
\n saddr.sin_family = AF_INET; \/\/ \u5730\u5740\u65cf：IPv4
\n saddr.sin_port = htons(80); \/\/ \u7ed1\u5b9aHTTP\u9ed8\u8ba4\u7aef\u53e380，\u4e3b\u673a\u5e8f\u8f6c\u7f51\u7edc\u5e8f
\n saddr.sin_addr.s_addr = inet_addr("127.0.0.1"); \/\/ \u7ed1\u5b9a\u672c\u5730\u56de\u73af\u5730\u5740，\u4ec5\u672c\u673a\u53ef\u8bbf\u95ee<\/p>\n
\/\/ \u7ed1\u5b9a：\u5c06\u5957\u63a5\u5b57\u4e0e\u6307\u5b9a\u7684IP+\u7aef\u53e3\u8fdb\u884c\u7ed1\u5b9a
\n int res = bind(sockfd,(struct sockaddr*)&saddr,sizeof(saddr));
\n if(res == -1)
\n {
\n printf("bind err\\\\n");
\n return -1;
\n }<\/p>\n
\/\/ \u76d1\u542c：\u5f00\u542f\u5957\u63a5\u5b57\u76d1\u542c，\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5，5\u662f\u534a\u8fde\u63a5\u961f\u5217\u957f\u5ea6
\n if(listen(sockfd,5) == -1)
\n {
\n return -1;
\n }
\n return sockfd; \/\/ \u521d\u59cb\u5316\u6210\u529f，\u8fd4\u56de\u76d1\u542c\u5957\u63a5\u5b57
\n}<\/p>\n
\/**************************************************************************
\n\u51fd\u6570\u540d：thread_fun
\n\u51fd\u6570\u529f\u80fd：\u7ebf\u7a0b\u5904\u7406\u4e1a\u52a1\u51fd\u6570，\u6bcf\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u5bf9\u5e94\u4e00\u4e2a\u72ec\u7acb\u7ebf\u7a0b
\n \u5b8c\u6210：\u63a5\u6536HTTP\u8bf7\u6c42 -> \u89e3\u6790\u6587\u4ef6\u8def\u5f84 -> \u6253\u5f00\u6587\u4ef6 -> \u8fd4\u56de\u6587\u4ef6\u7ed9\u6d4f\u89c8\u5668
\n\u53c2\u6570：arg \u4e3b\u7ebf\u7a0b\u4f20\u9012\u7684\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u63cf\u8ff0\u7b26\u5730\u5740
\n\u8fd4\u56de\u503c：\u7ebf\u7a0b\u9000\u51fa\u8fd4\u56deNULL
\n**************************************************************************\/
\nvoid* thread_fun(void* arg)
\n{
\n \/\/ \u63a5\u6536\u4e3b\u7ebf\u7a0b\u4f20\u9012\u7684\u5ba2\u6237\u7aef\u5957\u63a5\u5b57\u63cf\u8ff0\u7b26
\n int c = *(int*)arg;
\n free(arg); \/\/ \u91ca\u653emalloc\u7533\u8bf7\u7684\u5806\u5185\u5b58，\u9632\u6b62\u5185\u5b58\u6cc4\u6f0f<\/p>\n
\/\/ \u5b9a\u4e49\u7f13\u51b2\u533a\u63a5\u6536\u5ba2\u6237\u7aef\u7684HTTP\u8bf7\u6c42\u6570\u636e
\n char buff[1024] = {0};
\n \/\/ \u963b\u585e\u63a5\u6536\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u8bf7\u6c42\u6570\u636e，\u6210\u529f\u8fd4\u56de\u63a5\u6536\u5b57\u8282\u6570，\u5931\u8d25\/\u65ad\u5f00\u8fd4\u56de<=0
\n int n = recv(c,buff,1023,0);
\n if(n <= 0) \/\/ \u63a5\u6536\u5931\u8d25\u6216\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5
\n {
\n close(c); \/\/ \u5173\u95ed\u5ba2\u6237\u7aef\u5957\u63a5\u5b57
\n pthread_exit(NULL); \/\/ \u7ebf\u7a0b\u6b63\u5e38\u9000\u51fa
\n }
\n printf("recv buf=%s\\\\n",buff); \/\/ \u6253\u5370\u6536\u5230\u7684HTTP\u8bf7\u6c42\u62a5\u6587<\/p>\n
\/\/ 1. \u89e3\u6790HTTP\u8bf7\u6c42\u4e2d\u8981\u8bbf\u95ee\u7684\u6587\u4ef6\u8def\u5f84
\n char* filename = get_filename(buff);
\n if(filename == NULL) \/\/ \u89e3\u6790\u5931\u8d25，\u76f4\u63a5\u91ca\u653e\u8d44\u6e90\u9000\u51fa
\n {
\n close(c);
\n pthread_exit(NULL);
\n }<\/p>\n
\/\/ 2. \u62fc\u63a5\u8981\u6253\u5f00\u7684\u6587\u4ef6\u5b8c\u6574\u8def\u5f84
\n char path[256] = {0};
\n strcpy(path, PATH); \/\/ \u62fc\u63a5\u6839\u76ee\u5f55
\n if(strcmp(filename, "\/") == 0) \/\/ \u5982\u679c\u8bbf\u95ee\u6839\u76ee\u5f55 \/ ，\u9ed8\u8ba4\u6253\u5f00\u9996\u9875index.html
\n {
\n filename = "\/index.html";
\n }
\n strcat(path, filename); \/\/ \u62fc\u63a5\u5b8c\u6574\u6587\u4ef6\u8def\u5f84
\n printf("path=%s\\\\n",path); \/\/ \u6253\u5370\u62fc\u63a5\u540e\u7684\u6587\u4ef6\u8def\u5f84<\/p>\n
\/\/ ====================== \u4ee5\u4e0b\u662f\u4f60\u622a\u56fe\u7684\u6838\u5fc3\u4ee3\u7801 \u5b8c\u6574\u4fdd\u7559 ======================
\n \/\/ \u4ee5\u53ea\u8bfb\u65b9\u5f0f\u6253\u5f00\u62fc\u63a5\u597d\u7684\u6587\u4ef6
\n int fd = open(path,O_RDONLY);
\n if(fd == -1) \/\/ \u6587\u4ef6\u6253\u5f00\u5931\u8d25，\u76f4\u63a5\u8df3\u51fa\u903b\u8f91
\n {
\n close(c);
\n pthread_exit(NULL);
\n }
\n \/\/ \u901a\u8fc7\u6587\u4ef6\u504f\u79fb\u91cf\u8ba1\u7b97\u6587\u4ef6\u5927\u5c0f：\u5c06\u5149\u6807\u79fb\u5230\u6587\u4ef6\u672b\u5c3e，\u8fd4\u56de\u7684\u504f\u79fb\u91cf\u5c31\u662f\u6587\u4ef6\u603b\u5b57\u8282\u6570
\n int filesize = lseek(fd,0,SEEK_END);
\n lseek(fd,0,SEEK_SET); \/\/ \u5c06\u5149\u6807\u91cd\u65b0\u79fb\u56de\u6587\u4ef6\u5f00\u5934，\u51c6\u5907\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9<\/p>\n
\/\/ \u62fc\u63a5HTTP\u54cd\u5e94\u5934，\u4e25\u683c\u9075\u5b88HTTP\u534f\u8bae\u683c\u5f0f
\n char head[256] = {"HTTP\/1.1 200 OK\\\\r\\\\n"}; \/\/ \u72b6\u6001\u884c：\u8bf7\u6c42\u6210\u529f
\n strcat(head,"Server: myhttp\\\\r\\\\n"); \/\/ \u54cd\u5e94\u5934：\u670d\u52a1\u5668\u6807\u8bc6
\n sprintf(head,"%sContent-Length:%d\\\\r\\\\n",head,filesize); \/\/ \u54cd\u5e94\u5934：\u544a\u8bc9\u6d4f\u89c8\u5668\u6587\u4ef6\u5927\u5c0f
\n strcat(head,"\\\\r\\\\n"); \/\/ \u54cd\u5e94\u5934\u7ed3\u675f\u6807\u5fd7：\u7a7a\u884c(\\\\r\\\\n)
\n send(c,head,strlen(head),0); \/\/ \u5c06\u54cd\u5e94\u5934\u53d1\u9001\u7ed9\u6d4f\u89c8\u5668<\/p>\n
\/\/ \u5faa\u73af\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9，\u5206\u6279\u6b21\u53d1\u9001\u7ed9\u6d4f\u89c8\u5668
\n char data[1024] = {0}; \/\/ \u5b9a\u4e49\u6587\u4ef6\u8bfb\u53d6\u7f13\u51b2\u533a
\n int num = 0;
\n \/\/ \u6bcf\u6b21\u8bfb\u53d61024\u5b57\u8282，\u8bfb\u5230\u5185\u5bb9>0\u5219\u53d1\u9001，\u8bfb\u5b8c\u8fd4\u56de0\u5219\u7ed3\u675f\u5faa\u73af
\n while((num = read(fd,data,1024))>0)
\n {
\n send(c,data,num,0); \/\/ \u5c06\u8bfb\u53d6\u7684\u6587\u4ef6\u5185\u5bb9\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef
\n }
\n close(fd); \/\/ \u6587\u4ef6\u8bfb\u53d6\u5b8c\u6bd5，\u5173\u95ed\u6587\u4ef6\u63cf\u8ff0\u7b26\u91ca\u653e\u8d44\u6e90
\n \/\/ ====================== \u4f60\u622a\u56fe\u7684\u6838\u5fc3\u4ee3\u7801 \u7ed3\u675f ======================<\/p>\n
close(c); \/\/ \u5173\u95ed\u5ba2\u6237\u7aef\u5957\u63a5\u5b57，\u91ca\u653e\u8fde\u63a5\u8d44\u6e90
\n return NULL;
\n}<\/p>\n
\/**************************************************************************
\n\u4e3b\u51fd\u6570：\u7a0b\u5e8f\u5165\u53e3
\n\u529f\u80fd：\u521d\u59cb\u5316\u670d\u52a1\u5668 -> \u5faa\u73af\u63a5\u6536\u5ba2\u6237\u7aef\u8fde\u63a5 -> \u4e3a\u6bcf\u4e2a\u5ba2\u6237\u7aef\u521b\u5efa\u72ec\u7acb\u7ebf\u7a0b\u5904\u7406\u4e1a\u52a1
\n**************************************************************************\/
\nint main()
\n{
\n \/\/ \u8c03\u7528\u521d\u59cb\u5316\u51fd\u6570，\u83b7\u53d6\u76d1\u542c\u5957\u63a5\u5b57
\n int sockfd = socket_init();
\n if(sockfd == -1) \/\/ \u521d\u59cb\u5316\u5931\u8d25，\u76f4\u63a5\u9000\u51fa\u7a0b\u5e8f
\n {
\n exit(1);
\n }<\/p>\n
\/\/ \u8bbe\u7f6e\u7ebf\u7a0b\u5206\u79bb\u5c5e\u6027，\u89e3\u51b3\u7ebf\u7a0b\u9000\u51fa\u540e\u7684\u8d44\u6e90\u6cc4\u6f0f\u95ee\u9898
\n pthread_attr_t attr;
\n pthread_attr_init(&attr); \/\/ \u521d\u59cb\u5316\u7ebf\u7a0b\u5c5e\u6027
\n \/\/ \u8bbe\u7f6e\u5206\u79bb\u5c5e\u6027：\u7ebf\u7a0b\u8fd0\u884c\u7ed3\u675f\u540e，\u7cfb\u7edf\u81ea\u52a8\u56de\u6536\u7ebf\u7a0b\u8d44\u6e90，\u65e0\u9700\u4e3b\u7ebf\u7a0bjoin
\n pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);<\/p>\n
\/\/ \u6b7b\u5faa\u73af，\u6c38\u4e45\u76d1\u542c\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42
\n while(1)
\n {
\n \/\/ \u963b\u585e\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5，\u6210\u529f\u8fd4\u56de\u5ba2\u6237\u7aef\u5957\u63a5\u5b57，\u5931\u8d25\u8fd4\u56de-1
\n int c = accept(sockfd,NULL,NULL);
\n if(c < 0) \/\/ \u8fde\u63a5\u5931\u8d25，\u7ee7\u7eed\u7b49\u5f85\u4e0b\u4e00\u4e2a\u5ba2\u6237\u7aef
\n {
\n continue;
\n }
\n \/\/ \u52a8\u6001\u7533\u8bf7\u5806\u5185\u5b58\u5b58\u653e\u5ba2\u6237\u7aef\u5957\u63a5\u5b57，\u9632\u6b62\u7ebf\u7a0b\u5171\u4eab\u6808\u53d8\u91cf\u5bfc\u81f4\u6570\u636e\u9519\u4e71
\n int *p = (int*)malloc(sizeof(int));
\n *p = c;
\n pthread_t tid; \/\/ \u5b9a\u4e49\u7ebf\u7a0bID
\n \/\/ \u521b\u5efa\u7ebf\u7a0b\u5904\u7406\u5f53\u524d\u5ba2\u6237\u7aef\u7684\u4e1a\u52a1\u8bf7\u6c42
\n pthread_create(&tid,&attr,thread_fun,(void*)p);
\n }
\n close(sockfd); \/\/ \u5173\u95ed\u76d1\u542c\u5957\u63a5\u5b57(\u5b9e\u9645\u6b7b\u5faa\u73af\u4e0d\u4f1a\u6267\u884c\u5230\u8fd9\u91cc)
\n exit(0);
\n} <\/p>\n
\u6574\u4e2a\u4ee3\u7801\u4e00\u5171\u5206\u4e3a 3 \u4e2a\u6838\u5fc3\u51fd\u6570 + \u5934\u6587\u4ef6 \/ \u5b8f\u5b9a\u4e49，\u6267\u884c\u903b\u8f91\u662f：\u5b8f\u5b9a\u4e49\/\u5934\u6587\u4ef6 \u2192 socket_init() \u670d\u52a1\u5668\u521d\u59cb\u5316 \u2192 main() \u4e3b\u7ebf\u7a0b：\u63a5\u8fde\u63a5+\u521b\u7ebf\u7a0b \u2192 thread_fun() \u5b50\u7ebf\u7a0b：\u5904\u7406\u4e1a\u52a1+\u8fd4\u56de\u6587\u4ef6 \u2192 get_filename() \u5de5\u5177\u51fd\u6570：\u89e3\u6790\u8bf7\u6c42\u6240\u6709\u529f\u80fd\u5404\u53f8\u5176\u804c，\u4e3b\u7ebf\u7a0b\u53ea\u505a\u300c\u63a5\u5f85\u300d，\u5b50\u7ebf\u7a0b\u53ea\u505a\u300c\u5e72\u6d3b\u300d，\u5206\u5de5\u660e\u786e\u3002<\/p>\n
#include <stdio.h>
\n#include <stdlib.h>
\n#include <string.h>
\n#include <unistd.h>
\n#include <sys\/socket.h> \/\/ \u7f51\u7edc\u6838\u5fc3\u51fd\u6570：socket\/bind\/listen\/accept\/recv\/send
\n#include <netinet\/in.h> \/\/ \u7f51\u7edc\u5730\u5740\u7ed3\u6784\u4f53 sockaddr_in + \u5b57\u8282\u5e8f\u8f6c\u6362 htons
\n#include <arpa\/inet.h> \/\/ \u5730\u5740\u8f6c\u6362 inet_addr
\n#include <pthread.h> \/\/ \u7ebf\u7a0b\u5e93：pthread_create \u521b\u5efa\u7ebf\u7a0b\u3001pthread_exit \u9000\u51fa\u7ebf\u7a0b
\n#include <fcntl.h> \/\/ \u6587\u4ef6\u64cd\u4f5c：open \u6253\u5f00\u6587\u4ef6
\n#include <sys\/types.h> \/\/ \u7cfb\u7edf\u57fa\u7840\u7c7b\u578b\u5b9a\u4e49<\/p>\n
#define PATH "\/home\/stu\/c2305\/day22" \/\/ \u56fa\u5b9a\u5b8f：\u4f60\u7684\u670d\u52a1\u5668\u5b58\u653ehtml\u6587\u4ef6\u7684\u6839\u76ee\u5f55<\/p>\n
\u2705 \u6838\u5fc3\u8bf4\u660e：<\/p>\n
\u4ece\u6d4f\u89c8\u5668\u53d1\u9001\u7684HTTP \u8bf7\u6c42\u62a5\u6587\u91cc，\u63d0\u53d6\u51fa\u4f60\u8981\u8bbf\u95ee\u7684\u6587\u4ef6\u8def\u5f84\u3002<\/p>\n
\u6d4f\u89c8\u5668\u8bbf\u95ee http:\/\/127.0.0.1\/index.html \u65f6，\u4f1a\u7ed9\u670d\u52a1\u5668\u53d1\u4e00\u6bb5\u8bf7\u6c42\u6570\u636e，\u683c\u5f0f\u662f：GET \/index.html HTTP\/1.1 …<\/p>\n
\u4e00\u7ad9\u5f0f\u5b8c\u6210 TCP \u670d\u52a1\u5668\u7684\u521d\u59cb\u5316\u5de5\u4f5c，\u6267\u884c TCP \u670d\u52a1\u5668\u7684\u7ecf\u5178\u4e09\u6b65\u64cd\u4f5c，\u6210\u529f\u8fd4\u56de\u300c\u76d1\u542c\u5957\u63a5\u5b57\u300d，\u5931\u8d25\u8fd4\u56de – 1，\u662f\u6240\u6709\u7f51\u7edc\u901a\u4fe1\u7684\u57fa\u7840\u3002<\/p>\n
\u8fd9\u662f\u6574\u4e2a\u7a0b\u5e8f\u7684\u4e1a\u52a1\u6838\u5fc3！\u6bcf\u4e00\u4e2a\u6d4f\u89c8\u5668\u8fde\u63a5，\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u72ec\u7acb\u7684\u8fd9\u4e2a\u7ebf\u7a0b，\u6240\u6709\u548c\u6d4f\u89c8\u5668\u7684\u300c\u901a\u4fe1\u3001\u89e3\u6790\u8bf7\u6c42\u3001\u8bfb\u6587\u4ef6\u3001\u8fd4\u56de\u6587\u4ef6\u300d\u7684\u5de5\u4f5c，\u90fd\u5728\u8fd9\u4e2a\u51fd\u6570\u91cc\u5b8c\u6210\u3002<\/p>\n
\u53c2\u6570arg\u662f\u4e3b\u7ebf\u7a0b\u4f20\u8fc7\u6765\u7684\u300c\u5ba2\u6237\u7aef\u5957\u63a5\u5b57 c\u300d，\u8fd9\u4e2ac\u662f\u6d4f\u89c8\u5668\u548c\u670d\u52a1\u5668\u7684\u4e13\u5c5e\u901a\u4fe1\u901a\u9053，\u6bcf\u4e2a\u6d4f\u89c8\u5668\u7684c\u90fd\u4e0d\u4e00\u6837，\u4e92\u4e0d\u5e72\u6270\u3002<\/p>\n
plaintext<\/p>\n
1. \u63a5\u6536\u4e3b\u7ebf\u7a0b\u4f20\u7684\u5ba2\u6237\u7aef\u5957\u63a5\u5b57c \u2192 free\u91ca\u653e\u5806\u5185\u5b58（\u9632\u6b62\u5185\u5b58\u6cc4\u6f0f）
\n2. recv(c, buff, …) \u963b\u585e\u63a5\u6536\u6d4f\u89c8\u5668\u53d1\u6765\u7684HTTP\u8bf7\u6c42\u6570\u636e
\n3. \u5982\u679c\u63a5\u6536\u5931\u8d25\/\u6d4f\u89c8\u5668\u65ad\u5f00 \u2192 \u5173\u95edc，\u7ebf\u7a0b\u9000\u51fa
\n4. \u8c03\u7528get_filename\u89e3\u6790\u51fa\u8981\u8bbf\u95ee\u7684\u6587\u4ef6\u8def\u5f84
\n5. \u62fc\u63a5\u5b8c\u6574\u6587\u4ef6\u8def\u5f84：\u6839\u76ee\u5f55PATH + \u6587\u4ef6\u8def\u5f84 \u2192 \u6bd4\u5982 \/home\/stu\/c2305\/day22\/index.html
\n6. open(path, O_RDONLY) \u4ee5\u53ea\u8bfb\u65b9\u5f0f\u6253\u5f00\u8fd9\u4e2a\u6587\u4ef6
\n7. \u7528lseek\u8ba1\u7b97\u6587\u4ef6\u5927\u5c0f：\u5149\u6807\u79fb\u5230\u6587\u4ef6\u672b\u5c3e\u5f97\u5230\u603b\u5b57\u8282\u6570 \u2192 \u5149\u6807\u79fb\u56de\u5f00\u5934\u51c6\u5907\u8bfb\u53d6
\n8. \u62fc\u63a5HTTP\u54cd\u5e94\u5934：\u6309HTTP\u534f\u8bae\u89c4\u8303，\u544a\u8bc9\u6d4f\u89c8\u5668\u300c\u8bf7\u6c42\u6210\u529f，\u63a5\u4e0b\u6765\u7ed9\u4f60\u53d1\u6587\u4ef6\u300d
\n9. send\u53d1\u9001\u54cd\u5e94\u5934 \u2192 \u5faa\u73afread\u8bfb\u6587\u4ef6\u5185\u5bb9 + send\u53d1\u9001\u7ed9\u6d4f\u89c8\u5668
\n10. \u8bfb\u5b8c\u6587\u4ef6\u540e，close\u5173\u95ed\u6587\u4ef6\u3001close\u5173\u95ed\u5ba2\u6237\u7aef\u5957\u63a5\u5b57 \u2192 \u7ebf\u7a0b\u5b8c\u6210\u5de5\u4f5c，\u81ea\u52a8\u9000\u51fa<\/p>\n
\u8865\u5145\u7684\u300c\u6253\u5f00\u6587\u4ef6\u3001lseek \u7b97\u5927\u5c0f\u3001\u62fc\u54cd\u5e94\u5934\u3001\u8bfb\u6587\u4ef6\u53d1\u9001\u300d\u7684\u4ee3\u7801，\u5b8c\u6574\u653e\u5728\u8fd9\u4e2a\u51fd\u6570\u91cc，\u8fd9\u90e8\u5206\u662fHTTP \u670d\u52a1\u5668\u7684\u6838\u5fc3\u80fd\u529b：\u4ece\u300c\u53ea\u8fd4\u56de OK\u300d\u5347\u7ea7\u4e3a\u300c\u8fd4\u56de\u771f\u5b9e\u7f51\u9875\u6587\u4ef6\u300d\u3002<\/p>\n
\u8fd9\u662f\u7a0b\u5e8f\u7684\u5165\u53e3，\u6240\u6709\u4ee3\u7801\u4ece\u8fd9\u91cc\u5f00\u59cb\u6267\u884c，\u4e3b\u7ebf\u7a0b\u53ea\u505a\u4e00\u4ef6\u4e8b：\u65e0\u9650\u5faa\u73af\u63a5\u6536\u8fde\u63a5，\u4e3a\u6bcf\u4e2a\u8fde\u63a5\u521b\u5efa\u72ec\u7acb\u7ebf\u7a0b，\u4ec0\u4e48\u4e1a\u52a1\u90fd\u4e0d\u5904\u7406，\u4fdd\u8bc1\u6c38\u4e0d\u5361\u987f，\u662f\u591a\u7ebf\u7a0b\u5e76\u53d1\u7684\u7cbe\u9ad3！<\/p>\n
\u4e3b\u7ebf\u7a0b \u53ea\u505a\u300c\u63a5\u5ba2\u300d，\u5b50\u7ebf\u7a0b \u53ea\u505a\u300c\u5e72\u6d3b\u300d，\u4e3b\u7ebf\u7a0b\u6c38\u8fdc\u4e0d\u4f1a\u963b\u585e\u5728\u4e1a\u52a1\u903b\u8f91\u4e0a，\u53ef\u4ee5\u540c\u65f6\u63a5\u6536\u65e0\u6570\u4e2a\u6d4f\u89c8\u5668\u7684\u8fde\u63a5，\u8fd9\u5c31\u662f\u300c\u591a\u7ebf\u7a0b\u5e76\u53d1\u300d！<\/p>\n
\u628a\u6240\u6709\u903b\u8f91\u4e32\u8d77\u6765，\u4e00\u6b65\u4e00\u6b65\u6267\u884c，\u8fd9\u5c31\u662f\u4f60\u8fd0\u884c\u7a0b\u5e8f\u540e，\u5b8c\u6574\u7684\u6267\u884c\u8fc7\u7a0b，\u80cc\u4e0b\u6765，\u9762\u8bd5\u76f4\u63a5\u8bf4，\u6ee1\u5206\u7b54\u6848！<\/p>\n
plaintext<\/p>\n
1. \u7f16\u8bd1\u4ee3\u7801：gcc -o myhttp myhttp.c -lpthread （\u52a0-lpthread\u94fe\u63a5\u7ebf\u7a0b\u5e93）
\n2. \u8fd0\u884c\u7a0b\u5e8f：sudo .\/myhttp （sudo\u63d0\u6743，\u7ed1\u5b9a80\u7aef\u53e3\u6210\u529f，\u670d\u52a1\u5668\u542f\u52a8）
\n3. \u4e3b\u7ebf\u7a0b\u8fdb\u5165\u6b7b\u5faa\u73af，\u963b\u585e\u5728accept()，\u7b49\u5f85\u6d4f\u89c8\u5668\u8fde\u63a5
\n4. \u6253\u5f00\u6d4f\u89c8\u5668，\u8f93\u5165 http:\/\/127.0.0.1 \u8bbf\u95ee\u672c\u673a
\n5. accept()\u6536\u5230\u8fde\u63a5，\u8fd4\u56de\u5ba2\u6237\u7aef\u5957\u63a5\u5b57c \u2192 malloc\u5b58c \u2192 \u521b\u5efa\u5b50\u7ebf\u7a0b
\n6. \u5b50\u7ebf\u7a0b\u6267\u884cthread_fun：
\n – recv\u63a5\u6536\u6d4f\u89c8\u5668\u7684HTTP\u8bf7\u6c42 \u2192 get_filename\u89e3\u6790\u51fa \/ \u2192 \u66ff\u6362\u6210\/index.html
\n – \u62fc\u63a5\u8def\u5f84 \/home\/stu\/c2305\/day22\/index.html \u2192 open\u6253\u5f00\u8fd9\u4e2a\u6587\u4ef6
\n – lseek\u7b97\u6587\u4ef6\u5927\u5c0f \u2192 \u62fc\u63a5HTTP\u54cd\u5e94\u5934 \u2192 send\u53d1\u9001\u54cd\u5e94\u5934
\n – \u5faa\u73afread\u8bfb\u6587\u4ef6\u5185\u5bb9，send\u53d1\u9001\u7ed9\u6d4f\u89c8\u5668
\n7. \u6d4f\u89c8\u5668\u6536\u5230\u6587\u4ef6\u5185\u5bb9，\u6e32\u67d3\u51fa\u7f51\u9875\u9875\u9762
\n8. \u5b50\u7ebf\u7a0bclose\u6587\u4ef6\u3001close\u5ba2\u6237\u7aef\u5957\u63a5\u5b57 \u2192 \u7ebf\u7a0b\u9000\u51fa，\u7cfb\u7edf\u81ea\u52a8\u56de\u6536\u8d44\u6e90
\n9. \u4e3b\u7ebf\u7a0b\u4e00\u76f4\u5361\u5728accept()，\u7b49\u5f85\u4e0b\u4e00\u4e2a\u6d4f\u89c8\u5668\u8bbf\u95ee，\u5faa\u73af\u5f80\u590d，\u6c38\u4e45\u8fd0\u884c<\/p>\n
\u4e00\u4e2a\u7ebf\u7a0b\u5904\u7406\u4e00\u4e2a\u5ba2\u6237\u7aef，\u652f\u6301\u5e76\u53d1\u8bbf\u95ee：\u591a\u4e2a\u6d4f\u89c8\u5668\u53ef\u4ee5\u540c\u65f6\u8bbf\u95ee\u4f60\u7684\u670d\u52a1\u5668，\u4e92\u4e0d\u5f71\u54cd，\u6548\u7387\u8fdc\u9ad8\u4e8e\u5355\u7ebf\u7a0b\u3002<\/p>\n
\u5728\u4f60\u7684\u76ee\u5f55 \/home\/stu\/c2305\/day22 \u4e0b，\u521b\u5efa\u4e00\u4e2a\u6d4b\u8bd5\u7684index.html\u6587\u4ef6，\u968f\u4fbf\u5199\u5185\u5bb9\u5c31\u884c：<\/p>\n
cd \/home\/stu\/c2305\/day22
\ntouch index.html
\necho "<h1>\u6211\u7684HTTP\u670d\u52a1\u5668\u8fd0\u884c\u6210\u529f！<\/h1><p>\u8fd9\u662f\u6211\u7684\u7b2c\u4e00\u4e2a\u7f51\u9875<\/p>" > index.html<\/p>\n
\u5199\u5b8c\u540e\u6d4f\u89c8\u5668\u8bbf\u95ee http:\/\/127.0.0.1，\u5c31\u80fd\u770b\u5230\u9875\u9762\u4e86！<\/p>\n
\u6d4b\u8bd5:<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260114094138-696764d29affb.png\")
<\/p>\n
plaintext<\/p>\n
buff=GET \/dog2.jpeg HTTP\/1.1… # \u670d\u52a1\u5668\u6536\u5230\u6d4f\u89c8\u5668\u7684HTTP\u8bf7\u6c42，\u8bf7\u6c42\u65b9\u6cd5\u662fGET，\u76ee\u6807\u8d44\u6e90\u662f\/dog2.jpeg
\n\u8bf7\u6c42\u65b9\u6cd5: GET # \u89e3\u6790\u51fa\u8bf7\u6c42\u65b9\u6cd5\u4e3aGET
\npath:\/home\/stu\/c2305\/day22\/dog2.jpeg # \u62fc\u63a5\u540e\u7684\u5b8c\u6574\u56fe\u7247\u8def\u5f84<\/p>\n
\u8fd9\u4e9b\u65e5\u5fd7\u5bf9\u5e94\u4ee3\u7801\u4e2d\u7684 printf \u8f93\u51fa，\u8bc1\u660e\u670d\u52a1\u5668\u6210\u529f\u89e3\u6790\u4e86\u8bf7\u6c42\u5e76\u5b9a\u4f4d\u5230\u4e86\u56fe\u7247\u6587\u4ef6\u3002<\/p>\n
\u670d\u52a1\u5668\u7684\u5904\u7406\u903b\u8f91\u5bf9\u6240\u6709\u9759\u6001\u8d44\u6e90\u901a\u7528：<\/p>\n
\u4e00\u3001\u6d4f\u89c8\u5668\u8bbf\u95ee Web \u670d\u52a1\u5668\u7684 HTTP \u901a\u4fe1\u5168\u6d41\u7a0b
\n\u5305\u542b DNS \u89e3\u6790\u3001TCP \u8fde\u63a5\u3001HTTP \u6536\u53d1\u3001\u8fde\u63a5\u7ba1\u7406 4 \u4e2a\u6838\u5fc3\u73af\u8282，\u6211\u5206\u6b65\u9aa4\u62c6\u89e3（\u6e05\u6670\u5230\u6bcf\u4e00\u6b65）： \u6b65\u9aa4 1：DNS \u89e3\u6790（\u6d4f\u89c8\u5668\u5148\u627e\u5230\u670d\u52a1\u5668\u7684 IP）
\n\u6d4f\u89c8\u5668\u8f93\u5165www.baidu.com（\u57df\u540d），\u4f46\u7f51\u7edc\u901a\u4fe1\u9700\u8981IP \u5730\u5740；\u6d4f\u89c8\u5668\u5411DNS \u670d\u52a1\u5668\u53d1\u8d77\u8bf7\u6c42&<\/p>\n","protected":false},"author":2,"featured_media":59901,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[151,78,191],"topic":[],"class_list":["post-59907","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-http","tag-78","tag-191"],"yoast_head":"\n