curl smtp libcurl 邮件功能使用

/*

 * For an SMTP example using the multi interface please see smtp-multi.c.

 */

/* The libcurl options want plain addresses, the viewable headers in the mail

 * can very well get a full name as well.

 */

#define FROM_ADDR    "<furong@163.com>"

#define TO_ADDR      "<quange@qq.com>"

#define CC_ADDR      "<info@example.org>"

#define FROM_MAIL "Sender Person " FROM_ADDR

#define TO_MAIL   "A Receiver " TO_ADDR

#define CC_MAIL   "John CC Smith " CC_ADDR

static const char *payload_text[] = {

  "Date: Mon, 29 Nov 2019 21:54:29 +1100\r\n",

  "To: " TO_MAIL "\r\n",

  "From: " FROM_MAIL "\r\n",

  "Cc: " CC_MAIL "\r\n",

  "Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"

  "rfcpedant.example.org>\r\n",

  "Subject: SMTP example message\r\n",

  "\r\n", /* empty line to divide headers from body, see RFC5322 */

  "The body of the message starts here.\r\n",

  "\r\n",

  "It could be a lot of lines, could be MIME encoded, whatever.\r\n",

  "Check RFC5322.\r\n",

  NULL

};

int fileUploadSmtp()

{

  CURL *curl;

  CURLcode res = CURLE_OK;

  struct curl_slist *recipients = NULL;

  struct upload_status upload_ctx;

  upload_ctx.lines_read = 0;

  set_payload_text();

  curl = curl_easy_init();

  if(curl) {

    /* This is the URL for your mailserver */

    curl_easy_setopt(curl, CURLOPT_URL, "smtp://smtp.163.com");

    curl_easy_setopt(curl, CURLOPT_USERNAME, "furong@163.com");

    curl_easy_setopt(curl, CURLOPT_PASSWORD, "123456");

    /* Note that this option isn't strictly required, omitting it will result

     * in libcurl sending the MAIL FROM command with empty sender data. All

     * autoresponses should have an empty reverse-path, and should be directed

     * to the address in the reverse-path which triggered them. Otherwise,

     * they could cause an endless loop. See RFC 5321 Section 4.5.5 for more

     * details.

     */

    curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM_ADDR);

    /* Add two recipients, in this particular case they correspond to the

     * To: and Cc: addressees in the header, but they could be any kind of

     * recipient. */

    recipients = curl_slist_append(recipients, TO_ADDR);

    recipients = curl_slist_append(recipients, CC_ADDR);

    curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);

    /* We're using a callback function to specify the payload (the headers and

     * body of the message). You could just use the CURLOPT_READDATA option to

     * specify a FILE pointer to read from. */

    curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source);

    curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx);

    curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);

    /* Send the message */

    res = curl_easy_perform(curl);

    /* Check for errors */

    if(res != CURLE_OK)

      fprintf(stderr, "curl_easy_perform() failed: %s\n",

              curl_easy_strerror(res));

    /* Free the list of recipients */

    curl_slist_free_all(recipients);

    /* curl won't send the QUIT command until you call cleanup, so you should

     * be able to re-use this connection for additional messages (setting

     * CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and calling

     * curl_easy_perform() again. It may not be a good idea to keep the

     * connection open for a very long time though (more than a few minutes

     * may result in the server timing out the connection), and you do want to

     * clean up in the end.

     */

    curl_easy_cleanup(curl);

  }

  return (int)res;

}
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curl smtp libcurl 邮件功能使用

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