Set the request body of a #SoupMessage from glib.bytes.Bytes.
If content_type is null and bytes is not null the Content-Type header will not be changed if present. The request body needs to be set again in case msg is restarted (in case of redirection or authentication).
MIME Content-Type of the body, or null if unknown
a #GBytes with the request body data
Set the request body of a #SoupMessage from glib.bytes.Bytes.
If content_type is null and bytes is not null the Content-Type header will not be changed if present. The request body needs to be set again in case msg is restarted (in case of redirection or authentication).