1/*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2014, 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 http://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#include <stdio.h> 23#include <string.h> 24#include <curl/curl.h> 25 26/* This is a simple example showing how to send mail using libcurl's SMTP 27 * capabilities. For an exmaple of using the multi interface please see 28 * smtp-multi.c. 29 * 30 * Note that this example requires libcurl 7.20.0 or above. 31 */ 32 33#define FROM "<sender@example.org>" 34#define TO "<addressee@example.net>" 35#define CC "<info@example.org>" 36 37static const char *payload_text[] = { 38 "Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n", 39 "To: " TO "\r\n", 40 "From: " FROM "(Example User)\r\n", 41 "Cc: " CC "(Another example User)\r\n", 42 "Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@rfcpedant.example.org>\r\n", 43 "Subject: SMTP example message\r\n", 44 "\r\n", /* empty line to divide headers from body, see RFC5322 */ 45 "The body of the message starts here.\r\n", 46 "\r\n", 47 "It could be a lot of lines, could be MIME encoded, whatever.\r\n", 48 "Check RFC5322.\r\n", 49 NULL 50}; 51 52struct upload_status { 53 int lines_read; 54}; 55 56static size_t payload_source(void *ptr, size_t size, size_t nmemb, void *userp) 57{ 58 struct upload_status *upload_ctx = (struct upload_status *)userp; 59 const char *data; 60 61 if((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) { 62 return 0; 63 } 64 65 data = payload_text[upload_ctx->lines_read]; 66 67 if(data) { 68 size_t len = strlen(data); 69 memcpy(ptr, data, len); 70 upload_ctx->lines_read++; 71 72 return len; 73 } 74 75 return 0; 76} 77 78int main(void) 79{ 80 CURL *curl; 81 CURLcode res = CURLE_OK; 82 struct curl_slist *recipients = NULL; 83 struct upload_status upload_ctx; 84 85 upload_ctx.lines_read = 0; 86 87 curl = curl_easy_init(); 88 if(curl) { 89 /* This is the URL for your mailserver */ 90 curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com"); 91 92 /* Note that this option isn't strictly required, omitting it will result in 93 * libcurl sending the MAIL FROM command with empty sender data. All 94 * autoresponses should have an empty reverse-path, and should be directed 95 * to the address in the reverse-path which triggered them. Otherwise, they 96 * could cause an endless loop. See RFC 5321 Section 4.5.5 for more details. 97 */ 98 curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM); 99 100 /* Add two recipients, in this particular case they correspond to the 101 * To: and Cc: addressees in the header, but they could be any kind of 102 * recipient. */ 103 recipients = curl_slist_append(recipients, TO); 104 recipients = curl_slist_append(recipients, CC); 105 curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients); 106 107 /* We're using a callback function to specify the payload (the headers and 108 * body of the message). You could just use the CURLOPT_READDATA option to 109 * specify a FILE pointer to read from. */ 110 curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source); 111 curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx); 112 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L); 113 114 /* Send the message */ 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 /* Free the list of recipients */ 123 curl_slist_free_all(recipients); 124 125 /* curl won't send the QUIT command until you call cleanup, so you should be 126 * able to re-use this connection for additional messages (setting 127 * CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and calling 128 * curl_easy_perform() again. It may not be a good idea to keep the 129 * connection open for a very long time though (more than a few minutes may 130 * result in the server timing out the connection), and you do want to clean 131 * up in the end. 132 */ 133 curl_easy_cleanup(curl); 134 } 135 136 return (int)res; 137} 138