body_length(Req :: cowboy_req:req()) -> undefined | non_neg_integer()
cowboy_req:body_length - Body length
body_length(Req :: cowboy_req:req()) -> undefined | non_neg_integer()
Return the length of the request body.
The length is not always known before reading the body.
In those cases Cowboy will return undefined
. The body
length is available after the body has been fully read.
The Req object.
The length of the request body, or undefined
if it is
not known.
2.0: Only the length is returned, it is no longer wrapped in a tuple.
1.0: Function introduced.
Length = cowboy_req:body_length(Req).