Linux下用c語言實現發送http請求 方式能夠Get或者Post例程參考

[1].[代碼] Linux下用c語言實現發送http請求 方式能夠Get或者Post 跳至 [1]

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#include <stdio.h> #include <sys/socket.h> #include <sys/types.h> #include <time.h> #include <errno.h> #include <signal.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/wait.h> #include <sys/time.h> #include <netinet/in.h> #include <arpa/inet.h>   #define IPSTR "61.147.124.120" #define PORT 80 #define BUFSIZE 1024   int main( int argc, char **argv) {          int sockfd, ret, i, h;          struct sockaddr_in servaddr;          char str1[4096], str2[4096], buf[BUFSIZE], *str;          socklen_t len;          fd_set   t_set1;          struct timeval  tv;            if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ) {                  printf ( "建立網絡鏈接失敗,本線程即將終止---socket error!\n" );                  exit (0);          };            bzero(&servaddr, sizeof (servaddr));          servaddr.sin_family = AF_INET;          servaddr.sin_port = htons(PORT);          if (inet_pton(AF_INET, IPSTR, &servaddr.sin_addr) <= 0 ){                  printf ( "建立網絡鏈接失敗,本線程即將終止--inet_pton error!\n" );                  exit (0);          };            if (connect(sockfd, ( struct sockaddr *)&servaddr, sizeof (servaddr)) < 0){                  printf ( "鏈接到服務器失敗,connect error!\n" );                  exit (0);          }          printf ( "與遠端創建了鏈接\n" );            //發送數據          memset (str2, 0, 4096);          strcat (str2, "qqCode=474497857" );          str=( char *) malloc (128);          len = strlen (str2);          sprintf (str, "%d" , len);            memset (str1, 0, 4096);          strcat (str1, "POST /webservices/qqOnlineWebService.asmx/qqCheckOnline HTTP/1.1\n" );          strcat (str1, "Host: www.webxml.com.cn\n" );          strcat (str1, "Content-Type: application/x-www-form-urlencoded\n" );          strcat (str1, "Content-Length: " );          strcat (str1, str);          strcat (str1, "\n\n" );            strcat (str1, str2);          strcat (str1, "\r\n\r\n" );          printf ( "%s\n" ,str1);            ret = write(sockfd,str1, strlen (str1));          if (ret < 0) {                  printf ( "發送失敗！錯誤代碼是%d，錯誤信息是'%s'\n" , errno , strerror ( errno ));                  exit (0);          } else {                  printf ( "消息發送成功，共發送了%d個字節！\n\n" , ret);          }            FD_ZERO(&t_set1);          FD_SET(sockfd, &t_set1);            while (1){                  sleep(2);                  tv.tv_sec= 0;                  tv.tv_usec= 0;                  h= 0;                  printf ( "--------------->1" );                  h= select(sockfd +1, &t_set1, NULL, NULL, &tv);                  printf ( "--------------->2" );                    //if (h == 0) continue;                  if (h < 0) {                          close(sockfd);                          printf ( "在讀取數據報文時SELECT檢測到異常，該異常致使線程終止！\n" );                          return -1;                  };                    if (h > 0){                          memset (buf, 0, 4096);                          i= read(sockfd, buf, 4095);                          if (i==0){                                  close(sockfd);                                  printf ( "讀取數據報文時發現遠端關閉，該線程終止！\n" );                                  return -1;                          }                            printf ( "%s\n" , buf);                  }          }          close(sockfd);              return 0; }