gin/binding/json.go

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// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.
package binding
import (
"bytes"
"fmt"
"io"
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"net/http"
"github.com/gin-gonic/gin/internal/json"
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)
// EnableDecoderUseNumber is used to call the UseNumber method on the JSON
// Decoder instance. UseNumber causes the Decoder to unmarshal a number into an
// interface{} as a Number instead of as a float64.
var EnableDecoderUseNumber = false
// EnableDecoderDisallowUnknownFields is used to call the DisallowUnknownFields method
// on the JSON Decoder instance. DisallowUnknownFields causes the Decoder to
// return an error when the destination is a struct and the input contains object
// keys which do not match any non-ignored, exported fields in the destination.
var EnableDecoderDisallowUnknownFields = false
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type jsonBinding struct{}
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func (jsonBinding) Name() string {
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return "json"
}
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func (jsonBinding) Bind(req *http.Request, obj interface{}) error {
if req == nil || req.Body == nil {
return fmt.Errorf("invalid request")
}
return decodeJSON(req.Body, obj)
}
func (jsonBinding) BindBody(body []byte, obj interface{}) error {
return decodeJSON(bytes.NewReader(body), obj)
}
func decodeJSON(r io.Reader, obj interface{}) error {
decoder := json.NewDecoder(r)
if EnableDecoderUseNumber {
decoder.UseNumber()
}
if EnableDecoderDisallowUnknownFields {
decoder.DisallowUnknownFields()
}
if err := decoder.Decode(obj); err != nil {
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return err
}
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return validate(obj)
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}