Previously, there were impl TryFrom<Json> for Body and impl IntoResponse for T where T: TryInto<Body>, so Json was deduced as impl IntoResponse. However, Content-Type was not inserted in IntoResponse, which may cause problems.
Solution
This PR implements IntoResponse for Json and Form, and inserts Content-Type in the header. To avoid compilation issues, TryFrom<Json<T>> for Body has been removed. When the client needs to send json, users can call json directly without calling data and manually inserting the header.
Motivation
Previously, there were
impl TryFrom<Json> for Bodyandimpl IntoResponse for T where T: TryInto<Body>, soJsonwas deduced asimpl IntoResponse. However,Content-Typewas not inserted inIntoResponse, which may cause problems.Solution
This PR implements
IntoResponseforJsonandForm, and insertsContent-Typein the header. To avoid compilation issues,TryFrom<Json<T>> for Bodyhas been removed. When the client needs to send json, users can calljsondirectly without callingdataand manually inserting the header.