mirror of
https://github.com/curl/curl.git
synced 2024-11-27 05:50:21 +08:00
117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
/*****************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* An example of curl_easy_send() and curl_easy_recv() usage.
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <curl/curl.h>
|
|
|
|
/* Auxiliary function that waits on the socket. */
|
|
static int wait_on_socket(int sockfd, int for_recv, long timeout_ms)
|
|
{
|
|
struct timeval tv;
|
|
fd_set infd, outfd, errfd;
|
|
int res;
|
|
|
|
tv.tv_sec = timeout_ms / 1000;
|
|
tv.tv_usec= (timeout_ms % 1000) * 1000;
|
|
|
|
FD_ZERO(&infd);
|
|
FD_ZERO(&outfd);
|
|
FD_ZERO(&errfd);
|
|
|
|
FD_SET(sockfd, &errfd); /* always check for error */
|
|
|
|
if(for_recv)
|
|
{
|
|
FD_SET(sockfd, &infd);
|
|
}
|
|
else
|
|
{
|
|
FD_SET(sockfd, &outfd);
|
|
}
|
|
|
|
/* select() returns the number of signalled sockets or -1 */
|
|
res = select(sockfd + 1, &infd, &outfd, &errfd, &tv);
|
|
return res;
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
CURL *curl;
|
|
CURLcode res;
|
|
/* Minimalistic http request */
|
|
const char *request = "GET / HTTP/1.0\r\nHost: curl.haxx.se\r\n\r\n";
|
|
int sockfd; /* socket */
|
|
size_t iolen;
|
|
|
|
curl = curl_easy_init();
|
|
if(curl) {
|
|
curl_easy_setopt(curl, CURLOPT_URL, "curl.haxx.se");
|
|
/* 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 */
|
|
res = curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, &sockfd);
|
|
|
|
if(CURLE_OK != res)
|
|
{
|
|
printf("Error: %s\n", strerror(res));
|
|
return 1;
|
|
}
|
|
|
|
/* 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", 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)
|
|
break;
|
|
|
|
printf("Received %u bytes.\n", iolen);
|
|
}
|
|
|
|
/* always cleanup */
|
|
curl_easy_cleanup(curl);
|
|
}
|
|
return 0;
|
|
}
|