diff options
| -rw-r--r-- | docs/examples/Makefile.inc | 7 | ||||
| -rw-r--r-- | docs/examples/pop3-multi.c | 143 |
2 files changed, 147 insertions, 3 deletions
diff --git a/docs/examples/Makefile.inc b/docs/examples/Makefile.inc index 9e7331861..590fc8d5e 100644 --- a/docs/examples/Makefile.inc +++ b/docs/examples/Makefile.inc @@ -6,9 +6,10 @@ check_PROGRAMS = 10-at-a-time anyauthput cookie_interface debug fileupload \ sendrecv httpcustomheader certinfo chkspeed ftpgetinfo ftp-wildcard \ smtp-mail smtp-multi smtp-ssl smtp-tls smtp-vrfy smtp-expn rtsp \ externalsocket resolve progressfunc pop3-retr pop3-list pop3-uidl pop3-dele \ - pop3-top pop3-stat pop3-noop pop3-ssl pop3-tls imap-list imap-fetch \ - imap-store imap-append imap-examine imap-search imap-create imap-delete \ - imap-copy imap-noop imap-ssl imap-tls url2file sftpget ftpsget postinmemory + pop3-top pop3-stat pop3-noop pop3-ssl pop3-tls pop3-multi imap-list \ + imap-fetch imap-store imap-append imap-examine imap-search imap-create \ + imap-delete imap-copy imap-noop imap-ssl imap-tls url2file sftpget ftpsget \ + postinmemory # These examples require external dependencies that may not be commonly # available on POSIX systems, so don't bother attempting to compile them here. diff --git a/docs/examples/pop3-multi.c b/docs/examples/pop3-multi.c new file mode 100644 index 000000000..b2dfddd1b --- /dev/null +++ b/docs/examples/pop3-multi.c @@ -0,0 +1,143 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2014, 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 http://curl.haxx.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. + * + ***************************************************************************/ +#include <stdio.h> +#include <curl/curl.h> + +/* This is a simple example showing how to retrieve mail using libcurl's POP3 + * capabilities. It builds on the smtp-mail.c example to demonstrate how to use + * libcurl's multi interface. + * + * Note that this example requires libcurl 7.20.0 or above. + */ + +static struct timeval tvnow(void) +{ + struct timeval now; + + /* time() returns the value of time in seconds since the epoch */ + now.tv_sec = (long)time(NULL); + now.tv_usec = 0; + + return now; +} + +static long tvdiff(struct timeval newer, struct timeval older) +{ + return (newer.tv_sec - older.tv_sec) * 1000 + + (newer.tv_usec - older.tv_usec) / 1000; +} + +int main(void) +{ + CURL *curl; + CURLM *mcurl; + int still_running = 1; + struct timeval mp_start; + + curl_global_init(CURL_GLOBAL_DEFAULT); + + curl = curl_easy_init(); + if(!curl) + return 1; + + mcurl = curl_multi_init(); + if(!mcurl) + return 2; + + /* Set username and password */ + curl_easy_setopt(curl, CURLOPT_USERNAME, "user"); + curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret"); + + /* This will retreive message 1 from the user's mailbox */ + curl_easy_setopt(curl, CURLOPT_URL, "pop3://pop.example.com/1"); + + /* Tell the multi stack about our easy handle */ + curl_multi_add_handle(mcurl, curl); + + /* Record the start time which we can use later */ + mp_start = tvnow(); + + /* We start some action by calling perform right away */ + curl_multi_perform(mcurl, &still_running); + + while(still_running) { + struct timeval timeout; + fd_set fdread; + fd_set fdwrite; + fd_set fdexcep; + int maxfd = -1; + int rc; + + long curl_timeo = -1; + + /* Initialise the file descriptors */ + FD_ZERO(&fdread); + FD_ZERO(&fdwrite); + FD_ZERO(&fdexcep); + + /* Set a suitable timeout to play around with */ + timeout.tv_sec = 1; + timeout.tv_usec = 0; + + curl_multi_timeout(mcurl, &curl_timeo); + if(curl_timeo >= 0) { + timeout.tv_sec = curl_timeo / 1000; + if(timeout.tv_sec > 1) + timeout.tv_sec = 1; + else + timeout.tv_usec = (curl_timeo % 1000) * 1000; + } + + /* Get file descriptors from the transfers */ + curl_multi_fdset(mcurl, &fdread, &fdwrite, &fdexcep, &maxfd); + + /* In a real-world program you OF COURSE check the return code of the + function calls. On success, the value of maxfd is guaranteed to be + greater or equal than -1. We call select(maxfd + 1, ...), specially in + case of (maxfd == -1), we call select(0, ...), which is basically equal + to sleep. */ + rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout); + + if(tvdiff(tvnow(), mp_start) > MULTI_PERFORM_HANG_TIMEOUT) { + fprintf(stderr, + "ABORTING: Since it seems that we would have run forever.\n"); + break; + } + + switch(rc) { + case -1: /* select error */ + break; + case 0: /* timeout */ + default: /* action */ + curl_multi_perform(mcurl, &still_running); + break; + } + } + + /* Always cleanup */ + curl_multi_remove_handle(mcurl, curl); + curl_multi_cleanup(mcurl); + curl_easy_cleanup(curl); + curl_global_cleanup(); + + return 0; +} |