ParseBody reads a JSON-encoded body from a http.Request and unmarshals it into the provided object.

Render writes a JSON-encoded object to a http.ResponseWriter, as well as a HTTP status code.

RenderError writes an error, wrapped in the Message field of a JSON-encoded object to a http.ResponseWriter, as well as a HTTP status code.

MaxPostSize is the maximum number of bytes that ParseBody reads from an http.Request.Body.