1aeb635cdd
All C and H files now (should) feature the proper project curl source code header, which includes basic info, a copyright statement and some basic disclaimers.
133 lines
3.5 KiB
C
133 lines
3.5 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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/* An example of curl_easy_send() and curl_easy_recv() usage. */
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#include <stdio.h>
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#include <string.h>
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#include <curl/curl.h>
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/* Auxiliary function that waits on the socket. */
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static int wait_on_socket(curl_socket_t sockfd, int for_recv, long timeout_ms)
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{
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struct timeval tv;
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fd_set infd, outfd, errfd;
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int res;
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tv.tv_sec = timeout_ms / 1000;
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tv.tv_usec= (timeout_ms % 1000) * 1000;
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FD_ZERO(&infd);
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FD_ZERO(&outfd);
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FD_ZERO(&errfd);
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FD_SET(sockfd, &errfd); /* always check for error */
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if(for_recv)
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{
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FD_SET(sockfd, &infd);
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}
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else
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{
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FD_SET(sockfd, &outfd);
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}
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/* select() returns the number of signalled sockets or -1 */
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res = select(sockfd + 1, &infd, &outfd, &errfd, &tv);
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return res;
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}
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int main(void)
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{
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CURL *curl;
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CURLcode res;
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/* Minimalistic http request */
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const char *request = "GET / HTTP/1.0\r\nHost: example.com\r\n\r\n";
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curl_socket_t sockfd; /* socket */
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long sockextr;
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size_t iolen;
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curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
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/* Do not do the transfer - only connect to host */
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curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);
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res = curl_easy_perform(curl);
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if(CURLE_OK != res)
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{
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printf("Error: %s\n", strerror(res));
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return 1;
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}
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/* Extract the socket from the curl handle - we'll need it for waiting.
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* Note that this API takes a pointer to a 'long' while we use
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* curl_socket_t for sockets otherwise.
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*/
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res = curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, &sockextr);
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if(CURLE_OK != res)
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{
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printf("Error: %s\n", curl_easy_strerror(res));
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return 1;
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}
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sockfd = sockextr;
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/* wait for the socket to become ready for sending */
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if(!wait_on_socket(sockfd, 0, 60000L))
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{
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printf("Error: timeout.\n");
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return 1;
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}
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puts("Sending request.");
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/* Send the request. Real applications should check the iolen
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* to see if all the request has been sent */
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res = curl_easy_send(curl, request, strlen(request), &iolen);
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if(CURLE_OK != res)
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{
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printf("Error: %s\n", curl_easy_strerror(res));
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return 1;
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}
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puts("Reading response.");
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/* read the response */
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for(;;)
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{
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char buf[1024];
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wait_on_socket(sockfd, 1, 60000L);
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res = curl_easy_recv(curl, buf, 1024, &iolen);
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if(CURLE_OK != res)
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break;
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printf("Received %u bytes.\n", iolen);
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}
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/* always cleanup */
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curl_easy_cleanup(curl);
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}
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return 0;
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}
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