libcurl网络连接使用tcp/ip

CURL *curl;

CURLcode res;

const char *request = "GETas.xxxxE测试发送";

  curl_socket_t sockfd; /* socket */

  long sockextr;

  size_t iolen;

  curl = curl_easy_init();

  if(curl) {

  curl_easy_setopt(curl, CURLOPT_URL, "127.0.0.1");

  curl_easy_setopt(curl, CURLOPT_PORT, 7102);

    /* Do not do the transfer - only connect to host */

    curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);

    res = curl_easy_perform(curl);

    if(CURLE_OK != res)

    {

      printf("Error: %s ", strerror(res));

      return 1;

    }

    /* Extract the socket from the curl handle - we'll need it for waiting.

     * Note that this API takes a pointer to a 'long' while we use

     * curl_socket_t for sockets otherwise.

     */

    res = curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, &sockextr);

    if(CURLE_OK != res)

    {

      printf("Error: %s ", curl_easy_strerror(res));

      return 1;

    }

    sockfd = sockextr;

    /* wait for the socket to become ready for sending */

    //if(!wait_on_socket(sockfd, 0, 60000L))

    //{

    //  printf("Error: timeout. ");

    //  return 1;

    //}

    puts("Sending request.");

    /* Send the request. Real applications should check the iolen

     * to see if all the request has been sent */

    res = curl_easy_send(curl, request, strlen(request), &iolen);

    if(CURLE_OK != res)

    {

      printf("Error: %s ", curl_easy_strerror(res));

      return 1;

    }

    puts("Reading response.");

    /* read the response */

    for(;;)

    {

      char buf[1024];

     // wait_on_socket(sockfd, 1, 60000L);

      res = curl_easy_recv(curl, buf, 1024, &iolen);

      if(CURLE_OK == res)

{

      printf("Received %d bytes. ", iolen);

}

    }

    /* always cleanup */

    curl_easy_cleanup(curl);

  }

对于错误的处理

if( res == CURLE_OK && iolen > 0 )

        {

            //处理数据

             printf("Received %lu bytes. ", iolen);

        }

        elseif( res == CURLE_RECV_ERROR)

        {

            CCAssert("Client Miss Connect",NULL);

            printf( "socket state error #0 (%d)", res );

            //重连

            

        }

        elseif (res == CURLE_AGAIN )

        {

        }

        elseif(res == CURLE_UNSUPPORTED_PROTOCOL)

        {

            //重连

        }

        elseif(res == CURLE_OPERATION_TIMEDOUT)

        {

            //超时

            printf("连接超时。");

        }

CURLcode res;
const char *request = "GETas.xxxxE测试发送";
  curl_socket_t sockfd; /* socket */
  long sockextr;
  size_t iolen;
  curl = curl_easy_init();
  if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "127.0.0.1");
  curl_easy_setopt(curl, CURLOPT_PORT, 7102);
    /* Do not do the transfer - only connect to host */
    curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);
    res = curl_easy_perform(curl);
    if(CURLE_OK != res)
    {
      printf("Error: %s
", strerror(res));
      return 1;
    }
    /* Extract the socket from the curl handle - we'll need it for waiting.
     * Note that this API takes a pointer to a 'long' while we use
     * curl_socket_t for sockets otherwise.
     */
    res = curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, &sockextr);
    if(CURLE_OK != res)
    {
      printf("Error: %s
", curl_easy_strerror(res));
      return 1;
    }
    sockfd = sockextr;
    /* wait for the socket to become ready for sending */
    //if(!wait_on_socket(sockfd, 0, 60000L))
    //{
    //  printf("Error: timeout.
");
    //  return 1;
    //}
    puts("Sending request.");
    /* Send the request. Real applications should check the iolen
     * to see if all the request has been sent */
    res = curl_easy_send(curl, request, strlen(request), &iolen);
    if(CURLE_OK != res)
    {
      printf("Error: %s
", curl_easy_strerror(res));
      return 1;
    }
    puts("Reading response.");
    /* read the response */
    for(;;)
    {
      char buf[1024];
     // wait_on_socket(sockfd, 1, 60000L);
      res = curl_easy_recv(curl, buf, 1024, &iolen);
      if(CURLE_OK == res)
{
      printf("Received %d bytes.
", iolen);
}
    }
    /* always cleanup */
    curl_easy_cleanup(curl);
  }
对于错误的处理
if( res == CURLE_OK && iolen > 0 )
        {
            //处理数据
             printf("Received %lu bytes.
", iolen);
        }
        elseif( res == CURLE_RECV_ERROR)
        {
            CCAssert("Client Miss Connect",NULL);
            printf( "socket state error #0 (%d)", res );
            //重连

        }
        elseif (res == CURLE_AGAIN )
        {
        }
        elseif(res == CURLE_UNSUPPORTED_PROTOCOL)
        {
            //重连
        }
        elseif(res == CURLE_OPERATION_TIMEDOUT)
        {
            //超时
            printf("连接超时。");
        }

 

转载自：http://hi.baidu.com/baby_66_/item/24c3f0ce96263936e90f2ece