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curl / libcurl / API / Examples / imap-multi.c

imap-multi.c

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/***************************************************************************
 * _ _ ____ _
 * Project ___| | | | _ \| |
 * / __| | | | |_) | |
 * | (__| |_| | _ <| |___
 * \___|\___/|_| \_\_____|
 *
 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * SPDX-License-Identifier: curl
 *
 ***************************************************************************/
 
/* <DESC>
 * Get IMAP email with the multi interface
 * </DESC>
 */
 
#include <stdio.h>
#include <string.h>
#include <curl/curl.h>
 
/* This is a simple example showing how to fetch mail using libcurl's IMAP
 * capabilities. It builds on the imap-fetch.c example to demonstrate how to
 * use libcurl's multi interface.
 */
 
int main(void)
{
 CURL *curl;
 
 CURLcode res = curl_global_init(CURL_GLOBAL_ALL);
 if(res)
 return (int)res;
 
 curl = curl_easy_init();
 if(curl) {
 CURLM *mcurl;
 
 mcurl = curl_multi_init();
 if(mcurl) {
 int still_running = 1;
 
 /* Set username and password */
 curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
 curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
 
 /* This fetches message 1 from the user's inbox */
 curl_easy_setopt(curl, CURLOPT_URL, "imap://imap.example.com/"
 "INBOX/;UID=1");
 
 /* Tell the multi stack about our easy handle */
 curl_multi_add_handle(mcurl, curl);
 
 do {
 CURLMcode mc = curl_multi_perform(mcurl, &still_running);
 
 if(still_running)
 /* wait for activity, timeout or "nothing" */
 mc = curl_multi_poll(mcurl, NULL, 0, 1000, NULL);
 
 if(mc)
 break;
 } while(still_running);
 
 /* Always cleanup */
 curl_multi_remove_handle(mcurl, curl);
 curl_multi_cleanup(mcurl);
 }
 curl_easy_cleanup(curl);
 }
 
 curl_global_cleanup();
 
 return 0;
}

Notice

This source code example is simplified and ignores return codes and error checks to a large extent. We do this to highlight the libcurl function calls and related options and reduce unrelated code.

A real-world application will of course properly check every return value and exit correctly at the first serious error.

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