net/http: make "http: ContentLength=N with Body length 0" error message more intelligible #43650
Description
I think it would be nice to make error message more intelligible, e. g. "Request.Body's length (0) doesn't match Content-Length header (N)"
It may seem very obvious when you already know what the present error message means, but actually I couldn't understand. This SO question has 11k views and I suspect the majority of them are other confused developers.