blob: e19a6894dfbf0a37264f6684b42d0342b8b5473b [file] [log] [blame]
// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"encoding/json"
"fmt"
"mime"
"net/http"
)
// readRequestJSON expects req to have a JSON content type with a body that
// contains a JSON-encoded value complying with the underlying type of target.
// It populates target, or returns an error.
func readRequestJSON(req *http.Request, target any) error {
contentType := req.Header.Get("Content-Type")
mediaType, _, err := mime.ParseMediaType(contentType)
if err != nil {
return err
}
if mediaType != "application/json" {
return fmt.Errorf("expect application/json Content-Type, got %s", mediaType)
}
dec := json.NewDecoder(req.Body)
dec.DisallowUnknownFields()
return dec.Decode(target)
}
// renderJSON renders 'v' as JSON and writes it as a response into w.
func renderJSON(w http.ResponseWriter, v any) {
js, err := json.Marshal(v)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.Write(js)
}