1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2021, 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.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 * IMAP example showing how to send 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 mail using libcurl's IMAP
33 * capabilities.
34 *
35 * Note that this example requires libcurl 7.30.0 or above.
36 */
37
38 #define FROM "<sender@example.org>"
39 #define TO "<addressee@example.net>"
40 #define CC "<info@example.org>"
41
42 static const char *payload_text =
43 "Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n"
44 "To: " TO "\r\n"
45 "From: " FROM "(Example User)\r\n"
46 "Cc: " CC "(Another example User)\r\n"
47 "Message-ID: "
48 "<dcd7cb36-11db-487a-9f3a-e652a9458efd@rfcpedant.example.org>\r\n"
49 "Subject: IMAP example message\r\n"
50 "\r\n" /* empty line to divide headers from body, see RFC5322 */
51 "The body of the message starts here.\r\n"
52 "\r\n"
53 "It could be a lot of lines, could be MIME encoded, whatever.\r\n"
54 "Check RFC5322.\r\n";
55
56 struct upload_status {
57 size_t bytes_read;
58 };
59
payload_source(char * ptr,size_t size,size_t nmemb,void * userp)60 static size_t payload_source(char *ptr, size_t size, size_t nmemb, void *userp)
61 {
62 struct upload_status *upload_ctx = (struct upload_status *)userp;
63 const char *data;
64 size_t room = size * nmemb;
65
66 if((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) {
67 return 0;
68 }
69
70 data = &payload_text[upload_ctx->bytes_read];
71
72 if(data) {
73 size_t len = strlen(data);
74 if(room < len)
75 len = room;
76 memcpy(ptr, data, len);
77 upload_ctx->bytes_read += len;
78
79 return len;
80 }
81
82 return 0;
83 }
84
main(void)85 int main(void)
86 {
87 CURL *curl;
88 CURLcode res = CURLE_OK;
89
90 curl = curl_easy_init();
91 if(curl) {
92 long infilesize;
93 struct upload_status upload_ctx = { 0 };
94
95 /* Set username and password */
96 curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
97 curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
98
99 /* This will create a new message 100. Note that you should perform an
100 * EXAMINE command to obtain the UID of the next message to create and a
101 * SELECT to ensure you are creating the message in the OUTBOX. */
102 curl_easy_setopt(curl, CURLOPT_URL, "imap://imap.example.com/100");
103
104 /* In this case, we're using a callback function to specify the data. You
105 * could just use the CURLOPT_READDATA option to specify a FILE pointer to
106 * read from. */
107 curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source);
108 curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx);
109 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
110
111 infilesize = strlen(payload_text);
112 curl_easy_setopt(curl, CURLOPT_INFILESIZE, infilesize);
113
114 /* Perform the append */
115 res = curl_easy_perform(curl);
116
117 /* Check for errors */
118 if(res != CURLE_OK)
119 fprintf(stderr, "curl_easy_perform() failed: %s\n",
120 curl_easy_strerror(res));
121
122 /* Always cleanup */
123 curl_easy_cleanup(curl);
124 }
125
126 return (int)res;
127 }
128