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58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
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// Use of this source code is governed by a MIT style
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// license that can be found in the LICENSE file.
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package binding
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import (
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"bytes"
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"errors"
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"io"
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"net/http"
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"github.com/gin-gonic/gin/internal/json"
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)
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// EnableDecoderUseNumber is used to call the UseNumber method on the JSON
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// Decoder instance. UseNumber causes the Decoder to unmarshal a number into an
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// any as a Number instead of as a float64.
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var EnableDecoderUseNumber = false
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// EnableDecoderDisallowUnknownFields is used to call the DisallowUnknownFields method
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// on the JSON Decoder instance. DisallowUnknownFields causes the Decoder to
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// return an error when the destination is a struct and the input contains object
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// keys which do not match any non-ignored, exported fields in the destination.
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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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}
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func (jsonBinding) Bind(req *http.Request, obj any) error {
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if req == nil || req.Body == nil {
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return errors.New("invalid request")
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}
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//这里的body是io.Reader，如果关闭了，则不能读取第二次
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return decodeJSON(req.Body, obj)
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}
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func (jsonBinding) BindBody(body []byte, obj any) error {
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return decodeJSON(bytes.NewReader(body), obj)
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}
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func decodeJSON(r io.Reader, obj any) error {
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decoder := json.NewDecoder(r)
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if EnableDecoderUseNumber {
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decoder.UseNumber()
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}
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if EnableDecoderDisallowUnknownFields {
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decoder.DisallowUnknownFields()
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}
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if err := decoder.Decode(obj); err != nil {
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return err
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}
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return validate(obj)
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}
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