curl_mime_filename(3) Library Functions Manual curl_mime_filename(3)

curl_mime_filename - set a mime part's remote file name

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

const char *filename);

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.

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");
} }

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), curl_mime_data(3), curl_mime_filedata(3)

September 26, 2023 libcurl 8.4.0