sendrecv.c
上传用户:coffee44
上传日期:2018-10-23
资源大小:12304k
文件大小:3k
- /*****************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ | |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * ___|___/|_| ______|
- *
- * An example of curl_easy_send() and curl_easy_recv() usage.
- *
- * $Id: sendrecv.c,v 1.2 2008-08-14 18:41:37 danf Exp $
- */
- #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/1.0rnHost: curl.haxx.sernrn";
- 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: %sn", 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: %sn", 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: %sn", 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;
- }