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comparison mupdf-source/thirdparty/curl/docs/examples/smtp-authzid.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 - 2019, 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 on behalf of another user with SMTP
25 * </DESC>
26 */
27
28 #include <stdio.h>
29 #include <string.h>
30 #include <curl/curl.h>
31
32 /*
33 * This is a simple example show how to send an email using libcurl's SMTP
34 * capabilities.
35 *
36 * Note that this example requires libcurl 7.66.0 or above.
37 */
38
39 /* The libcurl options want plain addresses, the viewable headers in the mail
40 * can very well get a full name as well.
41 */
42 #define FROM_ADDR "<ursel@example.org>"
43 #define SENDER_ADDR "<kurt@example.org>"
44 #define TO_ADDR "<addressee@example.net>"
45
46 #define FROM_MAIL "Ursel " FROM_ADDR
47 #define SENDER_MAIL "Kurt " SENDER_ADDR
48 #define TO_MAIL "A Receiver " TO_ADDR
49
50 static const char *payload_text[] = {
51 "Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n",
52 "To: " TO_MAIL "\r\n",
53 "From: " FROM_MAIL "\r\n",
54 "Sender: " SENDER_MAIL "\r\n",
55 "Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
56 "rfcpedant.example.org>\r\n",
57 "Subject: SMTP example message\r\n",
58 "\r\n", /* empty line to divide headers from body, see RFC5322 */
59 "The body of the message starts here.\r\n",
60 "\r\n",
61 "It could be a lot of lines, could be MIME encoded, whatever.\r\n",
62 "Check RFC5322.\r\n",
63 NULL
64 };
65
66 struct upload_status {
67 int lines_read;
68 };
69
70 static size_t payload_source(void *ptr, size_t size, size_t nmemb, void *userp)
71 {
72 struct upload_status *upload_ctx = (struct upload_status *)userp;
73 const char *data;
74
75 if((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) {
76 return 0;
77 }
78
79 data = payload_text[upload_ctx->lines_read];
80
81 if(data) {
82 size_t len = strlen(data);
83 memcpy(ptr, data, len);
84 upload_ctx->lines_read++;
85
86 return len;
87 }
88
89 return 0;
90 }
91
92 int main(void)
93 {
94 CURL *curl;
95 CURLcode res = CURLE_OK;
96 struct curl_slist *recipients = NULL;
97 struct upload_status upload_ctx;
98
99 upload_ctx.lines_read = 0;
100
101 curl = curl_easy_init();
102 if(curl) {
103 /* This is the URL for your mailserver. In this example we connect to the
104 smtp-submission port as we require an authenticated connection. */
105 curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com:587");
106
107 /* Set the username and password */
108 curl_easy_setopt(curl, CURLOPT_USERNAME, "kurt");
109 curl_easy_setopt(curl, CURLOPT_PASSWORD, "xipj3plmq");
110
111 /* Set the authorisation identity (identity to act as) */
112 curl_easy_setopt(curl, CURLOPT_SASL_AUTHZID, "ursel");
113
114 /* Force PLAIN authentication */
115 curl_easy_setopt(curl, CURLOPT_LOGIN_OPTIONS, "AUTH=PLAIN");
116
117 /* Note that this option isn't strictly required, omitting it will result
118 * in libcurl sending the MAIL FROM command with empty sender data. All
119 * autoresponses should have an empty reverse-path, and should be directed
120 * to the address in the reverse-path which triggered them. Otherwise,
121 * they could cause an endless loop. See RFC 5321 Section 4.5.5 for more
122 * details.
123 */
124 curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM_ADDR);
125
126 /* Add a recipient, in this particular case it corresponds to the
127 * To: addressee in the header. */
128 recipients = curl_slist_append(recipients, TO_ADDR);
129 curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
130
131 /* We're using a callback function to specify the payload (the headers and
132 * body of the message). You could just use the CURLOPT_READDATA option to
133 * specify a FILE pointer to read from. */
134 curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source);
135 curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx);
136 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
137
138 /* Send the message */
139 res = curl_easy_perform(curl);
140
141 /* Check for errors */
142 if(res != CURLE_OK)
143 fprintf(stderr, "curl_easy_perform() failed: %s\n",
144 curl_easy_strerror(res));
145
146 /* Free the list of recipients */
147 curl_slist_free_all(recipients);
148
149 /* curl won't send the QUIT command until you call cleanup, so you should
150 * be able to re-use this connection for additional messages (setting
151 * CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and calling
152 * curl_easy_perform() again. It may not be a good idea to keep the
153 * connection open for a very long time though (more than a few minutes
154 * may result in the server timing out the connection), and you do want to
155 * clean up in the end.
156 */
157 curl_easy_cleanup(curl);
158 }
159
160 return (int)res;
161 }