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curl_mime_filename(3) libcurl 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 file name. When remote file name is set, content data is processed as a file, whatever is the part's content source. A part's remote file name is transmitted to the server in the associated Content-Disposition generated header.

part is the part's handle to assign the remote file name to.

filename points to the null-terminated file name string; it may be set to NULL to remove a previously attached remote file name.

The remote file name 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.


curl_mime *mime;
curl_mimepart *part;
/* create a mime handle */
mime = curl_mime_init(easy);
/* add a part */
part = curl_mime_addpart(mime);
/* send image data from memory */
curl_mime_data(part, imagebuf, imagebuf_len);
/* 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_filedata(3), curl_mime_data(3)

January 2, 2023 libcurl 7.88.1