Annotation of embedaddon/curl/docs/examples/smtp-mime.c, revision 1.1
1.1 ! misho 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: * SMTP example showing how to send mime 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 mime mail using libcurl's SMTP
! 33: * capabilities. For an example of using the multi interface please see
! 34: * smtp-multi.c.
! 35: *
! 36: * Note that this example requires libcurl 7.56.0 or above.
! 37: */
! 38:
! 39: #define FROM "<sender@example.org>"
! 40: #define TO "<addressee@example.net>"
! 41: #define CC "<info@example.org>"
! 42:
! 43: static const char *headers_text[] = {
! 44: "Date: Tue, 22 Aug 2017 14:08:43 +0100",
! 45: "To: " TO,
! 46: "From: " FROM " (Example User)",
! 47: "Cc: " CC " (Another example User)",
! 48: "Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
! 49: "rfcpedant.example.org>",
! 50: "Subject: example sending a MIME-formatted message",
! 51: NULL
! 52: };
! 53:
! 54: static const char inline_text[] =
! 55: "This is the inline text message of the e-mail.\r\n"
! 56: "\r\n"
! 57: " It could be a lot of lines that would be displayed in an e-mail\r\n"
! 58: "viewer that is not able to handle HTML.\r\n";
! 59:
! 60: static const char inline_html[] =
! 61: "<html><body>\r\n"
! 62: "<p>This is the inline <b>HTML</b> message of the e-mail.</p>"
! 63: "<br />\r\n"
! 64: "<p>It could be a lot of HTML data that would be displayed by "
! 65: "e-mail viewers able to handle HTML.</p>"
! 66: "</body></html>\r\n";
! 67:
! 68:
! 69: int main(void)
! 70: {
! 71: CURL *curl;
! 72: CURLcode res = CURLE_OK;
! 73:
! 74: curl = curl_easy_init();
! 75: if(curl) {
! 76: struct curl_slist *headers = NULL;
! 77: struct curl_slist *recipients = NULL;
! 78: struct curl_slist *slist = NULL;
! 79: curl_mime *mime;
! 80: curl_mime *alt;
! 81: curl_mimepart *part;
! 82: const char **cpp;
! 83:
! 84: /* This is the URL for your mailserver */
! 85: curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
! 86:
! 87: /* Note that this option isn't strictly required, omitting it will result
! 88: * in libcurl sending the MAIL FROM command with empty sender data. All
! 89: * autoresponses should have an empty reverse-path, and should be directed
! 90: * to the address in the reverse-path which triggered them. Otherwise,
! 91: * they could cause an endless loop. See RFC 5321 Section 4.5.5 for more
! 92: * details.
! 93: */
! 94: curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM);
! 95:
! 96: /* Add two recipients, in this particular case they correspond to the
! 97: * To: and Cc: addressees in the header, but they could be any kind of
! 98: * recipient. */
! 99: recipients = curl_slist_append(recipients, TO);
! 100: recipients = curl_slist_append(recipients, CC);
! 101: curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
! 102:
! 103: /* Build and set the message header list. */
! 104: for(cpp = headers_text; *cpp; cpp++)
! 105: headers = curl_slist_append(headers, *cpp);
! 106: curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
! 107:
! 108: /* Build the mime message. */
! 109: mime = curl_mime_init(curl);
! 110:
! 111: /* The inline part is an alternative proposing the html and the text
! 112: versions of the e-mail. */
! 113: alt = curl_mime_init(curl);
! 114:
! 115: /* HTML message. */
! 116: part = curl_mime_addpart(alt);
! 117: curl_mime_data(part, inline_html, CURL_ZERO_TERMINATED);
! 118: curl_mime_type(part, "text/html");
! 119:
! 120: /* Text message. */
! 121: part = curl_mime_addpart(alt);
! 122: curl_mime_data(part, inline_text, CURL_ZERO_TERMINATED);
! 123:
! 124: /* Create the inline part. */
! 125: part = curl_mime_addpart(mime);
! 126: curl_mime_subparts(part, alt);
! 127: curl_mime_type(part, "multipart/alternative");
! 128: slist = curl_slist_append(NULL, "Content-Disposition: inline");
! 129: curl_mime_headers(part, slist, 1);
! 130:
! 131: /* Add the current source program as an attachment. */
! 132: part = curl_mime_addpart(mime);
! 133: curl_mime_filedata(part, "smtp-mime.c");
! 134: curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);
! 135:
! 136: /* Send the message */
! 137: res = curl_easy_perform(curl);
! 138:
! 139: /* Check for errors */
! 140: if(res != CURLE_OK)
! 141: fprintf(stderr, "curl_easy_perform() failed: %s\n",
! 142: curl_easy_strerror(res));
! 143:
! 144: /* Free lists. */
! 145: curl_slist_free_all(recipients);
! 146: curl_slist_free_all(headers);
! 147:
! 148: /* curl won't send the QUIT command until you call cleanup, so you should
! 149: * be able to re-use this connection for additional messages (setting
! 150: * CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and calling
! 151: * curl_easy_perform() again. It may not be a good idea to keep the
! 152: * connection open for a very long time though (more than a few minutes
! 153: * may result in the server timing out the connection), and you do want to
! 154: * clean up in the end.
! 155: */
! 156: curl_easy_cleanup(curl);
! 157:
! 158: /* Free multipart message. */
! 159: curl_mime_free(mime);
! 160: }
! 161:
! 162: return (int)res;
! 163: }
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