DOKK / manpages / debian 12 / libcurl4-doc / curl_mime_headers.3.en
curl_mime_headers(3) libcurl Manual curl_mime_headers(3)

curl_mime_headers - set a mime part's custom headers

#include <curl/curl.h>
CURLcode curl_mime_headers(curl_mimepart *part,

struct curl_slist *headers, int take_ownership);

curl_mime_headers(3) sets a mime part's custom headers.

part is the part's handle to assign the custom headers list to.

headers is the head of a list of custom headers; it may be set to NULL to remove a previously attached custom header list.

take_ownership: when non-zero, causes the list to be freed upon replacement or mime structure deletion; in this case the list must not be freed explicitly.

Setting a part's custom headers list multiple times is valid: only the value set by the last call is retained.


struct curl_slist *headers = NULL;
headers = curl_slist_append(headers, "Custom-Header: mooo");
/* use these headers, please take ownership */
curl_mime_headers(part, headers, TRUE);
/* pass on this data */
curl_mime_data(part, "12345679", CURL_ZERO_TERMINATED);
/* set name */
curl_mime_name(part, "numbers");

As long as at least one of HTTP, SMTP or IMAP is enabled. Added in 7.56.0.

CURLE_OK or a CURL error code upon failure.

curl_mime_addpart(3)

January 2, 2023 libcurl 7.88.1