138 lines
4.7 KiB
C
138 lines
4.7 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 - 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 <string.h>
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#include <curl/curl.h>
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/* This is a simple example showing how to send mail using libcurl's SMTP
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* capabilities. For an exmaple of using the multi interface please see
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* smtp-multi.c.
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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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#define FROM "<sender@example.org>"
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#define TO "<addressee@example.net>"
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#define CC "<info@example.org>"
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static const char *payload_text[] = {
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"Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n",
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"To: " TO "\r\n",
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"From: " FROM "(Example User)\r\n",
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"Cc: " CC "(Another example User)\r\n",
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"Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@rfcpedant.example.org>\r\n",
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"Subject: SMTP example message\r\n",
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"\r\n", /* empty line to divide headers from body, see RFC5322 */
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"The body of the message starts here.\r\n",
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"\r\n",
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"It could be a lot of lines, could be MIME encoded, whatever.\r\n",
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"Check RFC5322.\r\n",
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NULL
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};
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struct upload_status {
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int lines_read;
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};
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static size_t payload_source(void *ptr, size_t size, size_t nmemb, void *userp)
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{
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struct upload_status *upload_ctx = (struct upload_status *)userp;
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const char *data;
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if((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) {
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return 0;
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}
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data = payload_text[upload_ctx->lines_read];
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if(data) {
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size_t len = strlen(data);
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memcpy(ptr, data, len);
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upload_ctx->lines_read++;
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return len;
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}
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return 0;
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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 = CURLE_OK;
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struct curl_slist *recipients = NULL;
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struct upload_status upload_ctx;
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upload_ctx.lines_read = 0;
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curl = curl_easy_init();
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if(curl) {
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/* This is the URL for your mailserver */
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curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
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/* Note that this option isn't strictly required, omitting it will result in
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* libcurl sending the MAIL FROM command with empty sender data. All
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* autoresponses should have an empty reverse-path, and should be directed
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* to the address in the reverse-path which triggered them. Otherwise, they
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* could cause an endless loop. See RFC 5321 Section 4.5.5 for more details.
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*/
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curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM);
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/* Add two recipients, in this particular case they correspond to the
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* To: and Cc: addressees in the header, but they could be any kind of
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* recipient. */
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recipients = curl_slist_append(recipients, TO);
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recipients = curl_slist_append(recipients, CC);
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curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
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/* We're using a callback function to specify the payload (the headers and
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* body of the message). You could just use the CURLOPT_READDATA option to
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* specify a FILE pointer to read from. */
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curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source);
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curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx);
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curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
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/* Send the message */
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res = curl_easy_perform(curl);
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/* Check for errors */
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if(res != CURLE_OK)
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fprintf(stderr, "curl_easy_perform() failed: %s\n",
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curl_easy_strerror(res));
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/* Free the list of recipients */
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curl_slist_free_all(recipients);
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/* curl won't send the QUIT command until you call cleanup, so you should be
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* able to re-use this connection for additional messages (setting
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* CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and calling
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* curl_easy_perform() again. It may not be a good idea to keep the
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* connection open for a very long time though (more than a few minutes may
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* result in the server timing out the connection), and you do want to clean
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* up in the end.
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*/
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curl_easy_cleanup(curl);
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}
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return (int)res;
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}
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