不完全总结linux下c访问http

linux下纯C简单的HTTP POST请求 客户端模型       ---经典收藏，源代码打包httppost.tar，感谢博主

c直接访问网页

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

int htconnect(char *host, int port){
        int white_sock;
        struct hostent * site;
        struct sockaddr_in me;
        site = gethostbyname(host);
        if (site==NULL) return -2;
        white_sock = socket(AF_INET,SOCK_STREAM,0);
        if (white_sock <0) return -1;
        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);
        return (connect(white_sock, (struct sockaddr *)&me,sizeof(struct sockaddr)) <0) ? -1 : white_sock;
}

int htsend(int sock, char *fmt, ...){
        char BUF[1024];
        va_list argptr;
        va_start(argptr,fmt);
        vsprintf(BUF,fmt,argptr);
        va_end(argptr);
        printf(BUF);
        return send(sock,BUF,strlen(BUF),0);
}

int main(int argc,char **argv){
        int black_sock;
        char bugs_bunny[3];
        if (argc<2){
                printf( "Please input the hostName. Example:\n %s www.sohu.com\n ",argv[0]);
                return;
        }
        black_sock = htconnect(argv[1],80);
        if (black_sock <1)return;
        htsend(black_sock, "GET / HTTP/1.0\n");
        htsend(black_sock, "Host: %s\n", argv[1]);
        htsend(black_sock, "\n");
        //htsend(black_sock, "%c ", 10);
        while (read(black_sock, bugs_bunny, 1)> 0)
                printf( "%c",bugs_bunny[0]);
        printf( "\n ");
        close(black_sock);
}