169 lines
5.6 KiB
C
169 lines
5.6 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* 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>
|
|
* Send SMTP mime emails
|
|
* </DESC>
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <curl/curl.h>
|
|
|
|
/* This is a simple example showing how to send mime mail using libcurl's SMTP
|
|
* capabilities. For an example of using the multi interface please see
|
|
* smtp-multi.c.
|
|
*
|
|
* Note that this example requires libcurl 7.56.0 or above.
|
|
*/
|
|
|
|
#define FROM "<sender@example.org>"
|
|
#define TO "<addressee@example.net>"
|
|
#define CC "<info@example.org>"
|
|
|
|
static const char *headers_text[] = {
|
|
"Date: Tue, 22 Aug 2017 14:08:43 +0100",
|
|
"To: " TO,
|
|
"From: " FROM " (Example User)",
|
|
"Cc: " CC " (Another example User)",
|
|
"Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
|
|
"rfcpedant.example.org>",
|
|
"Subject: example sending a MIME-formatted message",
|
|
NULL
|
|
};
|
|
|
|
static const char inline_text[] =
|
|
"This is the inline text message of the email.\r\n"
|
|
"\r\n"
|
|
" It could be a lot of lines that would be displayed in an email\r\n"
|
|
"viewer that is not able to handle HTML.\r\n";
|
|
|
|
static const char inline_html[] =
|
|
"<html><body>\r\n"
|
|
"<p>This is the inline <b>HTML</b> message of the email.</p>"
|
|
"<br />\r\n"
|
|
"<p>It could be a lot of HTML data that would be displayed by "
|
|
"email viewers able to handle HTML.</p>"
|
|
"</body></html>\r\n";
|
|
|
|
|
|
int main(void)
|
|
{
|
|
CURL *curl;
|
|
CURLcode res = CURLE_OK;
|
|
|
|
curl = curl_easy_init();
|
|
if(curl) {
|
|
struct curl_slist *headers = NULL;
|
|
struct curl_slist *recipients = NULL;
|
|
struct curl_slist *slist = NULL;
|
|
curl_mime *mime;
|
|
curl_mime *alt;
|
|
curl_mimepart *part;
|
|
const char **cpp;
|
|
|
|
/* This is the URL for your mailserver */
|
|
curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
|
|
|
|
/* Note that this option is not strictly required, omitting it results in
|
|
* libcurl sending the MAIL FROM command with empty sender data. All
|
|
* autoresponses should have an empty reverse-path, and should be directed
|
|
* to the address in the reverse-path which triggered them. Otherwise,
|
|
* they could cause an endless loop. See RFC 5321 Section 4.5.5 for more
|
|
* details.
|
|
*/
|
|
curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM);
|
|
|
|
/* Add two recipients, in this particular case they correspond to the
|
|
* To: and Cc: addressees in the header, but they could be any kind of
|
|
* recipient. */
|
|
recipients = curl_slist_append(recipients, TO);
|
|
recipients = curl_slist_append(recipients, CC);
|
|
curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
|
|
|
|
/* allow one of the recipients to fail and still consider it okay */
|
|
curl_easy_setopt(curl, CURLOPT_MAIL_RCPT_ALLOWFAILS, 1L);
|
|
|
|
/* Build and set the message header list. */
|
|
for(cpp = headers_text; *cpp; cpp++)
|
|
headers = curl_slist_append(headers, *cpp);
|
|
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
|
|
|
|
/* Build the mime message. */
|
|
mime = curl_mime_init(curl);
|
|
|
|
/* The inline part is an alternative proposing the html and the text
|
|
versions of the email. */
|
|
alt = curl_mime_init(curl);
|
|
|
|
/* HTML message. */
|
|
part = curl_mime_addpart(alt);
|
|
curl_mime_data(part, inline_html, CURL_ZERO_TERMINATED);
|
|
curl_mime_type(part, "text/html");
|
|
|
|
/* Text message. */
|
|
part = curl_mime_addpart(alt);
|
|
curl_mime_data(part, inline_text, CURL_ZERO_TERMINATED);
|
|
|
|
/* Create the inline part. */
|
|
part = curl_mime_addpart(mime);
|
|
curl_mime_subparts(part, alt);
|
|
curl_mime_type(part, "multipart/alternative");
|
|
slist = curl_slist_append(NULL, "Content-Disposition: inline");
|
|
curl_mime_headers(part, slist, 1);
|
|
|
|
/* Add the current source program as an attachment. */
|
|
part = curl_mime_addpart(mime);
|
|
curl_mime_filedata(part, "smtp-mime.c");
|
|
curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);
|
|
|
|
/* Send the message */
|
|
res = curl_easy_perform(curl);
|
|
|
|
/* Check for errors */
|
|
if(res != CURLE_OK)
|
|
fprintf(stderr, "curl_easy_perform() failed: %s\n",
|
|
curl_easy_strerror(res));
|
|
|
|
/* Free lists. */
|
|
curl_slist_free_all(recipients);
|
|
curl_slist_free_all(headers);
|
|
|
|
/* curl does not send the QUIT command until you call cleanup, so you
|
|
* should be able to reuse this connection for additional messages
|
|
* (setting CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and
|
|
* calling curl_easy_perform() again. It may not be a good idea to keep
|
|
* the connection open for a long time though (more than a few minutes may
|
|
* result in the server timing out the connection), and you do want to
|
|
* clean up in the end.
|
|
*/
|
|
curl_easy_cleanup(curl);
|
|
|
|
/* Free multipart message. */
|
|
curl_mime_free(mime);
|
|
}
|
|
|
|
return (int)res;
|
|
}
|