.\" generated by cd2nroff 0.1 from curl_mime_headers.md .TH curl_mime_headers 3 "2024-09-18" libcurl .SH NAME curl_mime_headers \- set a mime part\(aqs custom headers .SH SYNOPSIS .nf #include CURLcode curl_mime_headers(curl_mimepart *part, struct curl_slist *headers, int take_ownership); .fi .SH DESCRIPTION \fIcurl_mime_headers(3)\fP sets a mime part\(aqs custom headers. \fIpart\fP is the part\(aqs handle to assign the custom headers list to. \fIheaders\fP is the head of a list of custom headers; it may be set to NULL to remove a previously attached custom header list. \fItake_ownership\fP: 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\(aqs custom headers list multiple times is valid: only the value set by the last call is retained. .SH PROTOCOLS This functionality affects http, imap and smtp .SH EXAMPLE .nf int main(void) { struct curl_slist *headers = NULL; CURL *easy = curl_easy_init(); curl_mime *mime; curl_mimepart *part; headers = curl_slist_append(headers, "Custom-Header: mooo"); mime = curl_mime_init(easy); part = curl_mime_addpart(mime); /* use these headers in the part, takes ownership */ curl_mime_headers(part, headers, 1); /* pass on this data */ curl_mime_data(part, "12345679", CURL_ZERO_TERMINATED); /* set name */ curl_mime_name(part, "numbers"); /* Post and send it. */ curl_easy_setopt(easy, CURLOPT_MIMEPOST, mime); curl_easy_setopt(easy, CURLOPT_URL, "https://example.com"); curl_easy_perform(easy); } .fi .SH AVAILABILITY Added in curl 7.56.0 .SH RETURN VALUE CURLE_OK or a CURL error code upon failure. .SH SEE ALSO .BR curl_mime_addpart (3), .BR curl_mime_name (3)