feat: custom error type in axum request extractor

[goodbin]

Ability to specify a custom type of error in axum request extractor.

Example:

enum CustomError {
    Parse(ParseRequestError),
    Custom(String),
}

impl From<ParseRequestError> for CustomError {
    fn from(err: ParseRequestError) -> Self {
        Self::Parse(err)
    }
}

impl IntoResponse for CustomError {
    fn into_response(self) -> Response {
        match self {
            CustomError::Parse(e) => (StatusCode::PAYLOAD_TOO_LARGE, e.to_string()).into_response(),
            CustomError::Custom(e) => (StatusCode::INTERNAL_SERVER_ERROR, e).into_response(),
        }
    }
}

async fn graphql_handler(
    schema: Extension<StarWarsSchema>,
    req: GraphQLRequest<CustomError>,
) -> GraphQLResponse {
    schema.execute(req.into_inner()).await.into()
}

rejection::GraphQLRejection is used by default

[sunli829]

Thanks! 🙂