linux利用socket编程来下载网页的html代码

http://hi.baidu.com/zzniu1984/blog/item/f9c45a029dd96a7f3912bbd0.html

linux利用socket编程来下载网页的html代码

2009-05-20 14:53

编译该程序: gcc -g wclient.c -o wclient 运行该程序: ./wclient www.baidu.com 80 抓取百度首页的html代码 #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdarg.h> #include <sys/socket.h> #include <netinet/in.h> #include <netdb.h> //建立一个http tcp 连接的辅助函数 int htconnect(char *domain, int port) { int white_sock; struct hostent *site; struct sockaddr_in me; //获得服务器的名称 site = gethostbyname(domain); if(NULL == site) {     return (-2); } //建立套接字 white_sock = socket(AF_INET, SOCK_STREAM, 0); if(white_sock < 0) {     return (-1); } //初始化为0 memset(&me, 0, sizeof(struct sockaddr_in)); memcpy(&me.sin_addr, site->h_addr_list[0], site->h_length); me.sin_family = AF_INET; me.sin_port = htons(port); //建立连接 return ( (connect(white_sock, (struct sockaddr*)&me, sizeof(struct sockaddr))<0)?1:white_sock );  } void main(int argc, char** argv) { int black_sock; char bugs_bunny[3]; if(argc < 2) {     printf("usage:\nwClient host\n");     return; } black_sock = htconnect(argv[1], 80); if (black_sock<0) {        printf ( "Socket Connect Error!\n") ;        return ; } char *msg = "GET / HTTP/1.1\r\n\r\n"; if( send(black_sock, msg, strlen(msg), 0)<0 ) {    perror("error in send msg\n");    exit(1); } char buf[1000]; while(1) {    while((recv(black_sock,buf,1000,MSG_WAITALL))>0)    {    printf("%s",buf);    } } close(black_sock); }