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comparison mupdf-source/thirdparty/curl/docs/examples/smtp-mail.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 * Send e-mail with SMTP
25 * </DESC>
26 */
27
28 #include <stdio.h>
29 #include <string.h>
30 #include <curl/curl.h>
31
32 /*
33 * For an SMTP example using the multi interface please see smtp-multi.c.
34 */
35
36 /* The libcurl options want plain addresses, the viewable headers in the mail
37 * can very well get a full name as well.
38 */
39 #define FROM_ADDR "<sender@example.org>"
40 #define TO_ADDR "<addressee@example.net>"
41 #define CC_ADDR "<info@example.org>"
42
43 #define FROM_MAIL "Sender Person " FROM_ADDR
44 #define TO_MAIL "A Receiver " TO_ADDR
45 #define CC_MAIL "John CC Smith " CC_ADDR
46
47 static const char *payload_text[] = {
48 "Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n",
49 "To: " TO_MAIL "\r\n",
50 "From: " FROM_MAIL "\r\n",
51 "Cc: " CC_MAIL "\r\n",
52 "Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
53 "rfcpedant.example.org>\r\n",
54 "Subject: SMTP example message\r\n",
55 "\r\n", /* empty line to divide headers from body, see RFC5322 */
56 "The body of the message starts here.\r\n",
57 "\r\n",
58 "It could be a lot of lines, could be MIME encoded, whatever.\r\n",
59 "Check RFC5322.\r\n",
60 NULL
61 };
62
63 struct upload_status {
64 int lines_read;
65 };
66
67 static size_t payload_source(void *ptr, size_t size, size_t nmemb, void *userp)
68 {
69 struct upload_status *upload_ctx = (struct upload_status *)userp;
70 const char *data;
71
72 if((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) {
73 return 0;
74 }
75
76 data = payload_text[upload_ctx->lines_read];
77
78 if(data) {
79 size_t len = strlen(data);
80 memcpy(ptr, data, len);
81 upload_ctx->lines_read++;
82
83 return len;
84 }
85
86 return 0;
87 }
88
89 int main(void)
90 {
91 CURL *curl;
92 CURLcode res = CURLE_OK;
93 struct curl_slist *recipients = NULL;
94 struct upload_status upload_ctx;
95
96 upload_ctx.lines_read = 0;
97
98 curl = curl_easy_init();
99 if(curl) {
100 /* This is the URL for your mailserver */
101 curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
102
103 /* Note that this option isn't strictly required, omitting it will result
104 * in libcurl sending the MAIL FROM command with empty sender data. All
105 * autoresponses should have an empty reverse-path, and should be directed
106 * to the address in the reverse-path which triggered them. Otherwise,
107 * they could cause an endless loop. See RFC 5321 Section 4.5.5 for more
108 * details.
109 */
110 curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM_ADDR);
111
112 /* Add two recipients, in this particular case they correspond to the
113 * To: and Cc: addressees in the header, but they could be any kind of
114 * recipient. */
115 recipients = curl_slist_append(recipients, TO_ADDR);
116 recipients = curl_slist_append(recipients, CC_ADDR);
117 curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
118
119 /* We're using a callback function to specify the payload (the headers and
120 * body of the message). You could just use the CURLOPT_READDATA option to
121 * specify a FILE pointer to read from. */
122 curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source);
123 curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx);
124 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
125
126 /* Send the message */
127 res = curl_easy_perform(curl);
128
129 /* Check for errors */
130 if(res != CURLE_OK)
131 fprintf(stderr, "curl_easy_perform() failed: %s\n",
132 curl_easy_strerror(res));
133
134 /* Free the list of recipients */
135 curl_slist_free_all(recipients);
136
137 /* curl won't send the QUIT command until you call cleanup, so you should
138 * be able to re-use this connection for additional messages (setting
139 * CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and calling
140 * curl_easy_perform() again. It may not be a good idea to keep the
141 * connection open for a very long time though (more than a few minutes
142 * may result in the server timing out the connection), and you do want to
143 * clean up in the end.
144 */
145 curl_easy_cleanup(curl);
146 }
147
148 return (int)res;
149 }