curl_mime_filename(3) Library Functions Manual curl_mime_filename(3)
NAME
curl_mime_filename - set a mime part's remote filename
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_mime_filename(curl_mimepart *part,
const char *filename);
DESCRIPTION
curl_mime_filename(3) sets a mime part's remote filename. When remote
filename is set, content data is processed as a file, whatever is the
part's content source. A part's remote filename is transmitted to the
server in the associated Content-Disposition generated header.
part is the part's handle to assign the remote filename to.
filename points to the null-terminated filename string; it may be set to
NULL to remove a previously attached remote filename.
The remote filename string is copied into the part, thus the associated
storage may safely be released or reused after call. Setting a part's
file name multiple times is valid: only the value set by the last call
is retained.
PROTOCOLS
This functionality affects http, imap and smtp
EXAMPLE
static char imagebuf[]="imagedata";
int main(void)
{
curl_mime *mime;
curl_mimepart *part;
CURL *curl = curl_easy_init();
if(curl) {
/* create a mime handle */
mime = curl_mime_init(curl);
/* add a part */
part = curl_mime_addpart(mime);
/* send image data from memory */
curl_mime_data(part, imagebuf, sizeof(imagebuf));
/* set a file name to make it look like a file upload */
curl_mime_filename(part, "image.png");
/* set name */
curl_mime_name(part, "data");
}
}
AVAILABILITY
Added in curl 7.56.0
RETURN VALUE
This function returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred,
see libcurl-errors(3). If CURLOPT_ERRORBUFFER(3) was set with
curl_easy_setopt(3) there can be an error message stored in the error
buffer when non-zero is returned.
SEE ALSO
curl_mime_addpart(3), curl_mime_data(3), curl_mime_filedata(3)
libcurl 2026-07-12 curl_mime_filename(3)
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