curl/docs/libcurl/curl_mime_subparts.md
Daniel Stenberg b935fd4a07
docs: make each libcurl man specify protocol(s)
The mandatory header now has a mandatory list of protocols for which the
manpage is relevant.

Most man pages already has a "PROTOCOLS" section, but this introduces a
stricter way to specify the relevant protocols.

cd2nroff verifies that at least one protocol is mentioned (which can be
`*`).

This information is not used just yet, but A) the PROTOCOLS section can
now instead get generated and get a unified wording across all manpages
and B) this allows us to more reliably filter/search for protocol
specific manpages/options.

Closes #13166
2024-03-21 15:27:06 +01:00

88 lines
2.1 KiB
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: curl_mime_subparts
Section: 3
Source: libcurl
See-also:
- curl_mime_addpart (3)
- curl_mime_init (3)
Protocol:
- HTTP
- IMAP
- SMTP
---
# NAME
curl_mime_subparts - set sub-parts of a multipart mime part
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_mime_subparts(curl_mimepart *part, curl_mime *subparts);
~~~
# DESCRIPTION
curl_mime_subparts(3) sets a multipart mime part's content from a mime
structure.
*part* is a handle to the multipart part.
*subparts* is a mime structure handle holding the sub-parts. After
curl_mime_subparts(3) succeeds, the mime structure handle belongs to the
multipart part and must not be freed explicitly. It may however be updated by
subsequent calls to mime API functions.
Setting a part's contents multiple times is valid: only the value set by the
last call is retained. It is possible to unassign previous part's contents by
setting *subparts* to NULL.
# EXAMPLE
~~~c
static char *inline_html = "<title>example</title>";
static char *inline_text = "once upon the time";
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
struct curl_slist *slist;
/* The inline part is an alternative proposing the html and the text
versions of the email. */
curl_mime *alt = curl_mime_init(curl);
curl_mimepart *part;
/* HTML message. */
part = curl_mime_addpart(alt);
curl_mime_data(part, inline_html, CURL_ZERO_TERMINATED);
curl_mime_type(part, "text/html");
/* Text message. */
part = curl_mime_addpart(alt);
curl_mime_data(part, inline_text, CURL_ZERO_TERMINATED);
/* Create the inline part. */
part = curl_mime_addpart(alt);
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);
}
}
~~~
# AVAILABILITY
As long as at least one of HTTP, SMTP or IMAP is enabled. Added in 7.56.0.
# RETURN VALUE
CURLE_OK or a CURL error code upon failure.