libcurl网络连接使用tcp/ip

cc

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\n", 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\n", 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.\n");
// 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\n", 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.\n", 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.\n", 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。");
}