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curl/docs/examples/smtp-mime.c

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mime: tests and examples. Additional mime-specific tests. Existing tests updated to reflect small differences (Expect: 100-continue, data size change due to empty lines, etc). Option -F headers= keyword added to tests. test1135 disabled until the entry point order change is resolved. New example smtp-mime. Examples postit2 and multi-post converted from form API to mime API.
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
copyright: fix year ranges Follow-up from 4d2f8006777
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* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
mime: tests and examples. Additional mime-specific tests. Existing tests updated to reflect small differences (Expect: 100-continue, data size change due to empty lines, etc). Option -F headers= keyword added to tests. test1135 disabled until the entry point order change is resolved. New example smtp-mime. Examples postit2 and multi-post converted from form API to mime API.
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*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
curl.se: new home Closes #6172
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* are also available at https://curl.se/docs/copyright.html.
mime: tests and examples. Additional mime-specific tests. Existing tests updated to reflect small differences (Expect: 100-continue, data size change due to empty lines, etc). Option -F headers= keyword added to tests. test1135 disabled until the entry point order change is resolved. New example smtp-mime. Examples postit2 and multi-post converted from form API to mime API.
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*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
/* <DESC>
* SMTP example showing how to send mime e-mails
* </DESC>
*/
#include <stdio.h>
#include <string.h>
#include <curl/curl.h>
/* This is a simple example showing how to send mime mail using libcurl's SMTP
* capabilities. For an example of using the multi interface please see
* smtp-multi.c.
*
* Note that this example requires libcurl 7.56.0 or above.
*/
#define FROM "<sender@example.org>"
#define TO "<addressee@example.net>"
#define CC "<info@example.org>"
static const char *headers_text[] = {
"Date: Tue, 22 Aug 2017 14:08:43 +0100",
"To: " TO,
examples/mime: minor example code fixes
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"From: " FROM " (Example User)",
"Cc: " CC " (Another example User)",
mime: tests and examples. Additional mime-specific tests. Existing tests updated to reflect small differences (Expect: 100-continue, data size change due to empty lines, etc). Option -F headers= keyword added to tests. test1135 disabled until the entry point order change is resolved. New example smtp-mime. Examples postit2 and multi-post converted from form API to mime API.
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"Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
"rfcpedant.example.org>",
"Subject: example sending a MIME-formatted message",
NULL
};
static const char inline_text[] =
"This is the inline text message of the e-mail.\r\n"
"\r\n"
" It could be a lot of lines that would be displayed in an e-mail\r\n"
"viewer that is not able to handle HTML.\r\n";
static const char inline_html[] =
"<html><body>\r\n"
"<p>This is the inline <b>HTML</b> message of the e-mail.</p>"
"<br />\r\n"
"<p>It could be a lot of HTML data that would be displayed by "
"e-mail viewers able to handle HTML.</p>"
"</body></html>\r\n";
int main(void)
{
CURL *curl;
CURLcode res = CURLE_OK;
curl = curl_easy_init();
if(curl) {
examples: reduce variable scopes Closes https://github.com/curl/curl/pull/3919
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struct curl_slist *headers = NULL;
struct curl_slist *recipients = NULL;
struct curl_slist *slist = NULL;
curl_mime *mime;
curl_mime *alt;
curl_mimepart *part;
const char **cpp;
mime: tests and examples. Additional mime-specific tests. Existing tests updated to reflect small differences (Expect: 100-continue, data size change due to empty lines, etc). Option -F headers= keyword added to tests. test1135 disabled until the entry point order change is resolved. New example smtp-mime. Examples postit2 and multi-post converted from form API to mime API.
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/* This is the URL for your mailserver */
curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
/* 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);
/* 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);
recipients = curl_slist_append(recipients, CC);
curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
/* Build and set the message header list. */
for(cpp = headers_text; *cpp; cpp++)
headers = curl_slist_append(headers, *cpp);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
/* Build the mime message. */
mime = curl_mime_init(curl);
spelling fixes Detected using the `codespell` tool (version 1.13.0). Also secure and fix an URL.
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/* The inline part is an alternative proposing the html and the text
mime: tests and examples. Additional mime-specific tests. Existing tests updated to reflect small differences (Expect: 100-continue, data size change due to empty lines, etc). Option -F headers= keyword added to tests. test1135 disabled until the entry point order change is resolved. New example smtp-mime. Examples postit2 and multi-post converted from form API to mime API.
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versions of the e-mail. */
alt = curl_mime_init(curl);
/* HTML message. */
part = curl_mime_addpart(alt);
mime: use CURL_ZERO_TERMINATED in examples and some minor whitespace fixes
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curl_mime_data(part, inline_html, CURL_ZERO_TERMINATED);
mime: tests and examples. Additional mime-specific tests. Existing tests updated to reflect small differences (Expect: 100-continue, data size change due to empty lines, etc). Option -F headers= keyword added to tests. test1135 disabled until the entry point order change is resolved. New example smtp-mime. Examples postit2 and multi-post converted from form API to mime API.
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curl_mime_type(part, "text/html");
/* Text message. */
part = curl_mime_addpart(alt);
mime: use CURL_ZERO_TERMINATED in examples and some minor whitespace fixes
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curl_mime_data(part, inline_text, CURL_ZERO_TERMINATED);
mime: tests and examples. Additional mime-specific tests. Existing tests updated to reflect small differences (Expect: 100-continue, data size change due to empty lines, etc). Option -F headers= keyword added to tests. test1135 disabled until the entry point order change is resolved. New example smtp-mime. Examples postit2 and multi-post converted from form API to mime API.
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/* Create the inline part. */
part = curl_mime_addpart(mime);
curl_mime_subparts(part, alt);
curl_mime_type(part, "multipart/alternative");
slist = curl_slist_append(NULL, "Content-Disposition: inline");
curl_mime_headers(part, slist, 1);
/* Add the current source program as an attachment. */
part = curl_mime_addpart(mime);
curl_mime_filedata(part, "smtp-mime.c");
curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);
/* 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 lists. */
curl_slist_free_all(recipients);
curl_slist_free_all(headers);
/* 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);
mime: remove support "-" stdin pseudo-file name in curl_mime_filedata(). This feature is badly supported in Windows: as a replacement, a caller has to use curl_mime_data_cb() with fread, fseek and possibly fclose callbacks to process opened files. The cli tool and documentation are updated accordingly. The feature is however kept internally for form API compatibility, with the known caveats it always had. As a side effect, stdin size is not determined by the cli tool even if possible and this results in a chunked transfer encoding. Test 173 is updated accordingly.
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/* Free multipart message. */
curl_mime_free(mime);
mime: tests and examples. Additional mime-specific tests. Existing tests updated to reflect small differences (Expect: 100-continue, data size change due to empty lines, etc). Option -F headers= keyword added to tests. test1135 disabled until the entry point order change is resolved. New example smtp-mime. Examples postit2 and multi-post converted from form API to mime API.
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}
return (int)res;
}
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