curl/docs/libcurl/curl_mime_init.md
Daniel Stenberg eefcc1bda4
docs: introduce "curldown" for libcurl man page format
curldown is this new file format for libcurl man pages. It is markdown
inspired with differences:

- Each file has a set of leading headers with meta-data
- Supports a small subset of markdown
- Uses .md file extensions for editors/IDE/GitHub to treat them nicely
- Generates man pages very similar to the previous ones
- Generates man pages that still convert nicely to HTML on the website
- Detects and highlights mentions of curl symbols automatically (when
  their man page section is specified)

tools:

- cd2nroff: converts from curldown to nroff man page
- nroff2cd: convert an (old) nroff man page to curldown
- cdall: convert many nroff pages to curldown versions
- cd2cd: verifies and updates a curldown to latest curldown

This setup generates .3 versions of all the curldown versions at build time.

CI:

Since the documentation is now technically markdown in the eyes of many
things, the CI runs many more tests and checks on this documentation,
including proselint, link checkers and tests that make sure we capitalize the
first letter after a period...

Closes #12730
2024-01-23 00:29:02 +01:00

73 lines
1.7 KiB
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
SPDX-License-Identifier: curl
Title: curl_mime_init
Section: 3
Source: libcurl
See-also:
- CURLOPT_MIMEPOST (3)
- curl_mime_addpart (3)
- curl_mime_free (3)
- curl_mime_subparts (3)
---
# NAME
curl_mime_init - create a mime handle
# SYNOPSIS
~~~c
#include <curl/curl.h>
curl_mime *curl_mime_init(CURL *easy_handle);
~~~
# DESCRIPTION
curl_mime_init(3) creates a handle to a new empty mime structure.
This mime structure can be subsequently filled using the mime API, then
attached to some easy handle using option CURLOPT_MIMEPOST(3) within
a curl_easy_setopt(3) call or added as a multipart in another mime
handle's part using curl_mime_subparts(3).
*easy_handle* is used for part separator randomization and error
reporting. Since 7.87.0, it does not need to be the final target handle.
Using a mime handle is the recommended way to post an HTTP form, format and
send a multi-part email with SMTP or upload such an email to an IMAP server.
# EXAMPLE
~~~c
int main(void)
{
CURL *easy = curl_easy_init();
curl_mime *mime;
curl_mimepart *part;
/* Build an HTTP form with a single field named "data", */
mime = curl_mime_init(easy);
part = curl_mime_addpart(mime);
curl_mime_data(part, "This is the field data", CURL_ZERO_TERMINATED);
curl_mime_name(part, "data");
/* Post and send it. */
curl_easy_setopt(easy, CURLOPT_MIMEPOST, mime);
curl_easy_setopt(easy, CURLOPT_URL, "https://example.com");
curl_easy_perform(easy);
/* Clean-up. */
curl_easy_cleanup(easy);
curl_mime_free(mime);
}
~~~
# AVAILABILITY
As long as at least one of HTTP, SMTP or IMAP is enabled. Added in 7.56.0.
# RETURN VALUE
A mime struct handle, or NULL upon failure.