NAME

       curl_mime_type - set a mime part's content type

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_mime_type(curl_mimepart *part, const char *mimetype);

DESCRIPTION

       curl_mime_type(3) sets a mime part's content type.

       part is the part's handle to assign the content type to.

       mimetype  points  to  the  null-terminated  file  mime  type  string;  it  may be set to NULL to remove a
       previously attached mime type.

       The mime type string is copied into the part, thus the associated  storage  may  safely  be  released  or
       reused  after call. Setting a part's type multiple times is valid: only the value set by the last call is
       retained.

       In the absence of a mime type and if needed by the  protocol  specifications,  a  default  mime  type  is
       determined by the context:

       - If set as a custom header, use this value.

       - application/form-data for an HTTP form post.

       -   If   a   remote   filename  is  set,  the  mime  type  is  taken  from  the  filename  extension,  or
       application/octet-stream by default.

       - For a multipart part, multipart/mixed.

       - text/plain in other cases.

PROTOCOLS

       This functionality affects http, imap and smtp

EXAMPLE

       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);

           /* get data from this file */
           curl_mime_filedata(part, "image.png");

           /* content-type for this part */
           curl_mime_type(part, "image/png");

           /* set name */
           curl_mime_name(part, "image");
       }
       }

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_name(3)

libcurl                                            2025-03-05                                  curl_mime_type(3)