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comparison mupdf-source/thirdparty/curl/docs/examples/smtp-mime.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23 /* <DESC>
24 * SMTP example showing how to send mime e-mails
25 * </DESC>
26 */
27
28 #include <stdio.h>
29 #include <string.h>
30 #include <curl/curl.h>
31
32 /* This is a simple example showing how to send mime mail using libcurl's SMTP
33 * capabilities. For an example of using the multi interface please see
34 * smtp-multi.c.
35 *
36 * Note that this example requires libcurl 7.56.0 or above.
37 */
38
39 #define FROM "<sender@example.org>"
40 #define TO "<addressee@example.net>"
41 #define CC "<info@example.org>"
42
43 static const char *headers_text[] = {
44 "Date: Tue, 22 Aug 2017 14:08:43 +0100",
45 "To: " TO,
46 "From: " FROM " (Example User)",
47 "Cc: " CC " (Another example User)",
48 "Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
49 "rfcpedant.example.org>",
50 "Subject: example sending a MIME-formatted message",
51 NULL
52 };
53
54 static const char inline_text[] =
55 "This is the inline text message of the e-mail.\r\n"
56 "\r\n"
57 " It could be a lot of lines that would be displayed in an e-mail\r\n"
58 "viewer that is not able to handle HTML.\r\n";
59
60 static const char inline_html[] =
61 "<html><body>\r\n"
62 "<p>This is the inline <b>HTML</b> message of the e-mail.</p>"
63 "<br />\r\n"
64 "<p>It could be a lot of HTML data that would be displayed by "
65 "e-mail viewers able to handle HTML.</p>"
66 "</body></html>\r\n";
67
68
69 int main(void)
70 {
71 CURL *curl;
72 CURLcode res = CURLE_OK;
73
74 curl = curl_easy_init();
75 if(curl) {
76 struct curl_slist *headers = NULL;
77 struct curl_slist *recipients = NULL;
78 struct curl_slist *slist = NULL;
79 curl_mime *mime;
80 curl_mime *alt;
81 curl_mimepart *part;
82 const char **cpp;
83
84 /* This is the URL for your mailserver */
85 curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
86
87 /* Note that this option isn't strictly required, omitting it will result
88 * in libcurl sending the MAIL FROM command with empty sender data. All
89 * autoresponses should have an empty reverse-path, and should be directed
90 * to the address in the reverse-path which triggered them. Otherwise,
91 * they could cause an endless loop. See RFC 5321 Section 4.5.5 for more
92 * details.
93 */
94 curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM);
95
96 /* Add two recipients, in this particular case they correspond to the
97 * To: and Cc: addressees in the header, but they could be any kind of
98 * recipient. */
99 recipients = curl_slist_append(recipients, TO);
100 recipients = curl_slist_append(recipients, CC);
101 curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
102
103 /* Build and set the message header list. */
104 for(cpp = headers_text; *cpp; cpp++)
105 headers = curl_slist_append(headers, *cpp);
106 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
107
108 /* Build the mime message. */
109 mime = curl_mime_init(curl);
110
111 /* The inline part is an alternative proposing the html and the text
112 versions of the e-mail. */
113 alt = curl_mime_init(curl);
114
115 /* HTML message. */
116 part = curl_mime_addpart(alt);
117 curl_mime_data(part, inline_html, CURL_ZERO_TERMINATED);
118 curl_mime_type(part, "text/html");
119
120 /* Text message. */
121 part = curl_mime_addpart(alt);
122 curl_mime_data(part, inline_text, CURL_ZERO_TERMINATED);
123
124 /* Create the inline part. */
125 part = curl_mime_addpart(mime);
126 curl_mime_subparts(part, alt);
127 curl_mime_type(part, "multipart/alternative");
128 slist = curl_slist_append(NULL, "Content-Disposition: inline");
129 curl_mime_headers(part, slist, 1);
130
131 /* Add the current source program as an attachment. */
132 part = curl_mime_addpart(mime);
133 curl_mime_filedata(part, "smtp-mime.c");
134 curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);
135
136 /* Send the message */
137 res = curl_easy_perform(curl);
138
139 /* Check for errors */
140 if(res != CURLE_OK)
141 fprintf(stderr, "curl_easy_perform() failed: %s\n",
142 curl_easy_strerror(res));
143
144 /* Free lists. */
145 curl_slist_free_all(recipients);
146 curl_slist_free_all(headers);
147
148 /* curl won't send the QUIT command until you call cleanup, so you should
149 * be able to re-use this connection for additional messages (setting
150 * CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and calling
151 * curl_easy_perform() again. It may not be a good idea to keep the
152 * connection open for a very long time though (more than a few minutes
153 * may result in the server timing out the connection), and you do want to
154 * clean up in the end.
155 */
156 curl_easy_cleanup(curl);
157
158 /* Free multipart message. */
159 curl_mime_free(mime);
160 }
161
162 return (int)res;
163 }