libcurl网络连接使用tcp/ip

转自:http://blog.csdn.net/zengraoli/article/details/11580565

不多说直接看代码：

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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。");

}

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