1.源码实现


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/time.h>
#include <netdb.h>
#include <errno.h>

int main(int argc, char **argv)
{
    struct sockaddr_in server;
    struct timeval timeout = {10, 0};
    struct hostent *hp;
    char ip[20] = {0};
    char *hostname = "www.baidu.com";
    int sockfd;
    char message[1024];
    int size_recv, total_size = 0;
    int len;
    char slen[32];
    char chunk[512];

    memset(message, 0x00, sizeof(message));

    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if(sockfd == -1)
    {
        printf("could not create socket\n");
        return -1;
    }

    if((hp=gethostbyname(hostname)) == NULL)
    {
        close(sockfd);
        return -1;
    }

    strcpy(ip, inet_ntoa(*(struct in_addr *)hp->h_addr_list[0]));

    printf("ip=%s\n", ip);

    server.sin_addr.s_addr = inet_addr(ip);
    server.sin_family = AF_INET;
    server.sin_port = htons(80);

    /*连接服务端*/
    if(connect(sockfd, (struct sockaddr *)&server, sizeof(server)) < 0)
    {
        printf("connect error： %s", errno);
        return 1;
    }

    /*http协议Get请求*/
    strcpy(message, "GET /?ddd=eee HTTP/1.1\r\n");
    strcat(message, "Host: www.baidu.com\r\n");
    strcat(message, "Content-Type: text/html\r\n");
    strcat(message,