Annotation of embedaddon/curl/docs/examples/smtp-authzid.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: * 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: }
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