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https://github.com/moparisthebest/curl
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examples: Added POP3 multi example
This commit is contained in:
Steve Holme
parent
190e41f840
commit
2492fd30e5
@ -6,9 +6,10 @@ check_PROGRAMS = 10-at-a-time anyauthput cookie_interface debug fileupload \
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sendrecv httpcustomheader certinfo chkspeed ftpgetinfo ftp-wildcard \
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smtp-mail smtp-multi smtp-ssl smtp-tls smtp-vrfy smtp-expn rtsp \
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externalsocket resolve progressfunc pop3-retr pop3-list pop3-uidl pop3-dele \
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pop3-top pop3-stat pop3-noop pop3-ssl pop3-tls imap-list imap-fetch \
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imap-store imap-append imap-examine imap-search imap-create imap-delete \
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imap-copy imap-noop imap-ssl imap-tls url2file sftpget ftpsget postinmemory
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pop3-top pop3-stat pop3-noop pop3-ssl pop3-tls pop3-multi imap-list \
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imap-fetch imap-store imap-append imap-examine imap-search imap-create \
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imap-delete imap-copy imap-noop imap-ssl imap-tls url2file sftpget ftpsget \
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postinmemory
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# These examples require external dependencies that may not be commonly
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# available on POSIX systems, so don't bother attempting to compile them here.
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143
docs/examples/pop3-multi.c
Normal file
143
docs/examples/pop3-multi.c
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@ -0,0 +1,143 @@
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/***************************************************************************
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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 - 2014, 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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#include <stdio.h>
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#include <curl/curl.h>
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/* This is a simple example showing how to retrieve mail using libcurl's POP3
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* capabilities. It builds on the smtp-mail.c example to demonstrate how to use
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* libcurl's multi interface.
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*
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* Note that this example requires libcurl 7.20.0 or above.
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*/
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static struct timeval tvnow(void)
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{
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struct timeval now;
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/* time() returns the value of time in seconds since the epoch */
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now.tv_sec = (long)time(NULL);
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now.tv_usec = 0;
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return now;
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}
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static long tvdiff(struct timeval newer, struct timeval older)
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{
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return (newer.tv_sec - older.tv_sec) * 1000 +
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(newer.tv_usec - older.tv_usec) / 1000;
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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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CURLM *mcurl;
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int still_running = 1;
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struct timeval mp_start;
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curl_global_init(CURL_GLOBAL_DEFAULT);
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curl = curl_easy_init();
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if(!curl)
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return 1;
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mcurl = curl_multi_init();
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if(!mcurl)
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return 2;
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/* Set username and password */
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curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
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curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
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/* This will retreive message 1 from the user's mailbox */
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curl_easy_setopt(curl, CURLOPT_URL, "pop3://pop.example.com/1");
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/* Tell the multi stack about our easy handle */
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curl_multi_add_handle(mcurl, curl);
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/* Record the start time which we can use later */
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mp_start = tvnow();
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/* We start some action by calling perform right away */
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curl_multi_perform(mcurl, &still_running);
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while(still_running) {
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struct timeval timeout;
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fd_set fdread;
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fd_set fdwrite;
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fd_set fdexcep;
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int maxfd = -1;
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int rc;
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long curl_timeo = -1;
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/* Initialise the file descriptors */
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FD_ZERO(&fdread);
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FD_ZERO(&fdwrite);
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FD_ZERO(&fdexcep);
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/* Set a suitable timeout to play around with */
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timeout.tv_sec = 1;
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timeout.tv_usec = 0;
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curl_multi_timeout(mcurl, &curl_timeo);
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if(curl_timeo >= 0) {
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timeout.tv_sec = curl_timeo / 1000;
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if(timeout.tv_sec > 1)
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timeout.tv_sec = 1;
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else
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timeout.tv_usec = (curl_timeo % 1000) * 1000;
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}
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/* Get file descriptors from the transfers */
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curl_multi_fdset(mcurl, &fdread, &fdwrite, &fdexcep, &maxfd);
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/* In a real-world program you OF COURSE check the return code of the
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function calls. On success, the value of maxfd is guaranteed to be
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greater or equal than -1. We call select(maxfd + 1, ...), specially in
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case of (maxfd == -1), we call select(0, ...), which is basically equal
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to sleep. */
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rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
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if(tvdiff(tvnow(), mp_start) > MULTI_PERFORM_HANG_TIMEOUT) {
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fprintf(stderr,
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"ABORTING: Since it seems that we would have run forever.\n");
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break;
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}
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switch(rc) {
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case -1: /* select error */
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break;
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case 0: /* timeout */
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default: /* action */
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curl_multi_perform(mcurl, &still_running);
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break;
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}
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}
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/* Always cleanup */
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curl_multi_remove_handle(mcurl, curl);
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curl_multi_cleanup(mcurl);
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curl_easy_cleanup(curl);
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curl_global_cleanup();
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return 0;
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}
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