quickjs-tart

quickjs-based runtime for wallet-core logic
Log | Files | Refs | README | LICENSE

smtp-multi.c (4671B)

      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 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  * SPDX-License-Identifier: curl
     22  *
     23  ***************************************************************************/
     24 
     25 /* <DESC>
     26  * Send SMTP email with the multi interface
     27  * </DESC>
     28  */
     29 
     30 #include <string.h>
     31 #include <curl/curl.h>
     32 
     33 /* This is an example showing how to send mail using libcurl's SMTP
     34  * capabilities. It builds on the smtp-mail.c example to demonstrate how to use
     35  * libcurl's multi interface.
     36  */
     37 
     38 #define FROM_MAIL     "<sender@example.com>"
     39 #define TO_MAIL       "<recipient@example.com>"
     40 #define CC_MAIL       "<info@example.com>"
     41 
     42 static const char *payload_text =
     43   "Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n"
     44   "To: " TO_MAIL "\r\n"
     45   "From: " FROM_MAIL "\r\n"
     46   "Cc: " CC_MAIL "\r\n"
     47   "Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
     48   "rfcpedant.example.org>\r\n"
     49   "Subject: SMTP example message\r\n"
     50   "\r\n" /* empty line to divide headers from body, see RFC 5322 */
     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 RFC 5322.\r\n";
     55 
     56 struct upload_status {
     57   size_t bytes_read;
     58 };
     59 
     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 
     85 int main(void)
     86 {
     87   CURL *curl;
     88   CURLM *mcurl;
     89   int still_running = 1;
     90   struct curl_slist *recipients = NULL;
     91   struct upload_status upload_ctx = { 0 };
     92 
     93   curl_global_init(CURL_GLOBAL_DEFAULT);
     94 
     95   curl = curl_easy_init();
     96   if(!curl)
     97     return 1;
     98 
     99   mcurl = curl_multi_init();
    100   if(!mcurl)
    101     return 2;
    102 
    103   /* This is the URL for your mailserver */
    104   curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
    105 
    106   /* Note that this option is not strictly required, omitting it results in
    107    * libcurl sending the MAIL FROM command with empty sender data. All
    108    * autoresponses should have an empty reverse-path, and should be directed
    109    * to the address in the reverse-path which triggered them. Otherwise, they
    110    * could cause an endless loop. See RFC 5321 Section 4.5.5 for more details.
    111    */
    112   curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM_MAIL);
    113 
    114   /* Add two recipients, in this particular case they correspond to the
    115    * To: and Cc: addressees in the header, but they could be any kind of
    116    * recipient. */
    117   recipients = curl_slist_append(recipients, TO_MAIL);
    118   recipients = curl_slist_append(recipients, CC_MAIL);
    119   curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
    120 
    121   /* We are using a callback function to specify the payload (the headers and
    122    * body of the message). You could just use the CURLOPT_READDATA option to
    123    * specify a FILE pointer to read from. */
    124   curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source);
    125   curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx);
    126   curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
    127 
    128   /* Tell the multi stack about our easy handle */
    129   curl_multi_add_handle(mcurl, curl);
    130 
    131   do {
    132     CURLMcode mc = curl_multi_perform(mcurl, &still_running);
    133 
    134     if(still_running)
    135       /* wait for activity, timeout or "nothing" */
    136       mc = curl_multi_poll(mcurl, NULL, 0, 1000, NULL);
    137 
    138     if(mc)
    139       break;
    140 
    141   } while(still_running);
    142 
    143   /* Free the list of recipients */
    144   curl_slist_free_all(recipients);
    145 
    146   /* Always cleanup */
    147   curl_multi_remove_handle(mcurl, curl);
    148   curl_multi_cleanup(mcurl);
    149   curl_easy_cleanup(curl);
    150   curl_global_cleanup();
    151 
    152   return 0;
    153 }