mirror of
https://github.com/gin-gonic/gin.git
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325 lines
8.6 KiB
Go
325 lines
8.6 KiB
Go
// Copyright 2025 Gin Core Team. 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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//go:build jsoniter
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package json
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import (
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"io"
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jsoniter "github.com/json-iterator/go"
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)
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// Package indicates what library is being used for JSON encoding.
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const Package = "github.com/json-iterator/go"
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func containsAF(s string) bool {
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for _, char := range s {
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if char >= 'a' && char <= 'f' {
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return true
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}
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}
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return false
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}
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// HexStringEncoder 自定义编码器将 int64 类型编码为十六进制字符串或者把16进制转为int64
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type HexStringEncoder struct {
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IsInt64Pointer bool //源数据为 *int64
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}
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// Encode 实现 jsoniter.ValEncoder 接口
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func (e *HexStringEncoder) Encode(ptr unsafe.Pointer, stream *jsoniter.Stream) {
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if ptr == nil {
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stream.WriteNil()
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return
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}
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// Convert *int64 value to a 16-byte hexadecimal string
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if e.IsInt64Pointer {
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pp := (**int64)(ptr)
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if *pp == nil {
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stream.WriteNil()
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return
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}
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stream.WriteString(fmt.Sprintf("%x", **pp))
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return
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}
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// Convert int64 value to a 16-byte hexadecimal string
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value := *(*int64)(ptr)
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if value == 0 {
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stream.WriteString("0") //0值特殊处理
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} else {
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stream.WriteString(fmt.Sprintf("%x", value))
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}
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}
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func (e *HexStringEncoder) IsEmpty(ptr unsafe.Pointer) bool {
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return ptr == nil || *(*int64)(ptr) == 0
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}
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func (codec *HexStringEncoder) Decode(ptr unsafe.Pointer, iter *jsoniter.Iterator) {
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valueType := iter.WhatIsNext()
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if valueType == jsoniter.StringValue {
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str := iter.ReadString()
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var i int64
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var err error
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if len(str) < 17 || containsAF(str) {
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i, err = strconv.ParseInt(str, 16, 64)
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if err != nil {
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i = 0
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}
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} else {
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i, err = strconv.ParseInt(str, 10, 64)
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if err != nil {
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i = 0
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}
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}
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*((*int64)(ptr)) = i
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} else if valueType == jsoniter.NumberValue {
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*((*int64)(ptr)) = iter.ReadInt64()
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} else {
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*((*int64)(ptr)) = 0
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}
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}
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// EmptyObjectEncoder 实现一个编码器，当字段值为nil时，写入空对象{}
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type EmptyObjectEncoder struct {
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encoder jsoniter.ValEncoder
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}
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func (encoder *EmptyObjectEncoder) Encode(ptr unsafe.Pointer, stream *jsoniter.Stream) {
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// If the pointer points to nil, write an empty object.
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if *(*uintptr)(ptr) == 0 {
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stream.WriteRaw("{}")
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return
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}
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// Fallback to default encoding.
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encoder.encoder.Encode(ptr, stream)
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}
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func (encoder *EmptyObjectEncoder) IsEmpty(ptr unsafe.Pointer) bool {
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return encoder.encoder.IsEmpty(ptr)
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}
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type EmptyArrayEncoder struct {
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encoder jsoniter.ValEncoder
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}
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func (encoder *EmptyArrayEncoder) Encode(ptr unsafe.Pointer, stream *jsoniter.Stream) {
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// If the pointer points to nil, write an empty object.
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if *(*uintptr)(ptr) == 0 {
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stream.WriteRaw("[]")
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return
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}
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// Fallback to default encoding.
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encoder.encoder.Encode(ptr, stream)
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}
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func (encoder *EmptyArrayEncoder) IsEmpty(ptr unsafe.Pointer) bool {
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return encoder.encoder.IsEmpty(ptr)
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}
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// 空数组64位数组
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type EmptyArrayInt64Encoder struct {
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encoder jsoniter.ValEncoder
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decoder jsoniter.ValDecoder
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}
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func (encoder *EmptyArrayInt64Encoder) Encode(ptr unsafe.Pointer, stream *jsoniter.Stream) {
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// If the pointer points to nil, write an empty object.
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if *(*uintptr)(ptr) == 0 {
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stream.WriteRaw("[]")
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return
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}
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//循环数组
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slice := (*[]int64)(ptr)
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strSlice := make([]string, len(*slice))
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for i, v := range *slice {
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if v == 0 {
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strSlice[i] = "0"
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} else {
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strSlice[i] = fmt.Sprintf("%x", v)
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}
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}
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jsonData, err := jsonInstance.Marshal(strSlice)
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if err != nil {
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encoder.encoder.Encode(ptr, stream)
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return
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}
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stream.WriteRaw(string(jsonData))
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}
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func (codec *EmptyArrayInt64Encoder) Decode(ptr unsafe.Pointer, iter *jsoniter.Iterator) {
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//str := iter.ReadString()
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valueList := []int64{}
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for iter.ReadArray() {
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val := iter.Read()
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if iter.Error != nil {
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break
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}
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if str, ok := val.(string); ok {
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//含有a-f或者正好16位使用16进制解析
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if len(str) < 17 || containsAF(str) {
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intVal, err := strconv.ParseInt(str, 16, 64)
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if err != nil {
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continue
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}
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valueList = append(valueList, intVal)
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} else {
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intVal, err := strconv.ParseInt(str, 10, 64)
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if err != nil {
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continue
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}
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valueList = append(valueList, intVal)
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}
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}
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}
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// 将ptr解析为*[]int64类型的指针
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ptrToSlice := (*[]int64)(ptr)
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// 使用reflect包将ptr的内容替换为slice
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reflect.ValueOf(ptrToSlice).Elem().Set(reflect.ValueOf(valueList))
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}
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func (encoder *EmptyArrayInt64Encoder) IsEmpty(ptr unsafe.Pointer) bool {
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return encoder.encoder.IsEmpty(ptr)
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}
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type ToStringEncoder struct{}
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func (codec *ToStringEncoder) Decode(ptr unsafe.Pointer, iter *jsoniter.Iterator) {
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valueType := iter.WhatIsNext()
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if valueType == jsoniter.StringValue {
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str := iter.ReadString()
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*((*string)(ptr)) = str
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} else {
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valueAsString := iter.ReadAny().ToString()
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*((*string)(ptr)) = valueAsString
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}
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}
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type ToBoolEncoder struct {
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decoder jsoniter.ValDecoder
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DefaultVal bool
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}
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func (codec *ToBoolEncoder) Decode(ptr unsafe.Pointer, iter *jsoniter.Iterator) {
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valueType := iter.WhatIsNext()
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if valueType == jsoniter.BoolValue {
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codec.decoder.Decode(ptr, iter)
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} else if valueType == jsoniter.NumberValue {
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i := iter.ReadInt()
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var myBool bool
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if i > 0 {
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myBool = true
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} else {
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myBool = false
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}
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*((*bool)(ptr)) = myBool
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} else if valueType == jsoniter.StringValue {
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str := strings.ToLower(iter.ReadString())
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var myBool bool
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if str == "true" || str == "1" {
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myBool = true
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} else if str == "false" || str == "0" || str == "-1" {
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myBool = false
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} else {
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myBool = codec.DefaultVal
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}
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*((*bool)(ptr)) = myBool
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} else {
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str := strings.ToLower(iter.ReadAny().ToString())
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var myBool bool
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if str == "true" || str == "1" {
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myBool = true
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} else if str == "false" || str == "0" || str == "-1" {
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myBool = false
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} else {
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myBool = codec.DefaultVal
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}
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*((*bool)(ptr)) = myBool
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}
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}
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// HexStringExtension 检查 struct 字段tags，为相应的 int64 字段应用 HexStringEncoder
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type ApipostExtension struct {
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jsoniter.DummyExtension
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}
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// UpdateStructDescriptor 修改 struct 字段的编码/解码器
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func (extension *ApipostExtension) UpdateStructDescriptor(structDescriptor *jsoniter.StructDescriptor) {
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for _, binding := range structDescriptor.Fields {
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// 检查字段类型和 tag
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if binding.Field.Type().Kind() == reflect.Int64 {
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//处理64位转换
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if strings.Contains(binding.Field.Tag().Get("json"), "hexstring") {
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binding.Encoder = &HexStringEncoder{}
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binding.Decoder = &HexStringEncoder{}
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}
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} else if binding.Field.Type().Kind() == reflect.Ptr || binding.Field.Type().Kind() == reflect.Interface {
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if strings.Contains(binding.Field.Tag().Get("json"), "hexstring") && binding.Field.Type().Type1().Elem().Kind() == reflect.Int64 { //处理*int64位转换
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binding.Encoder = &HexStringEncoder{IsInt64Pointer: true}
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} else if strings.Contains(binding.Field.Tag().Get("json"), "emptyobject") { //处理空对象
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binding.Encoder = &EmptyObjectEncoder{binding.Encoder}
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}
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} else if binding.Field.Type().Kind() == reflect.Slice || binding.Field.Type().Kind() == reflect.Array {
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//处理空数组
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if binding.Field.Type().Type1().Elem().String() == "int64" {
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//强制转64数组
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int64SliceEncode := &EmptyArrayInt64Encoder{binding.Encoder, binding.Decoder}
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binding.Encoder = int64SliceEncode
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binding.Decoder = int64SliceEncode
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} else if strings.Contains(binding.Field.Tag().Get("json"), "emptyarray") {
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binding.Encoder = &EmptyArrayEncoder{binding.Encoder}
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}
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} else if binding.Field.Type().Kind() == reflect.String {
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if strings.Contains(binding.Field.Tag().Get("json"), "tostring") {
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binding.Decoder = &ToStringEncoder{}
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}
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} else if binding.Field.Type().Kind() == reflect.Bool {
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tagStr := binding.Field.Tag().Get("json")
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if strings.Contains(tagStr, "tofalse") {
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binding.Decoder = &ToBoolEncoder{binding.Decoder, false}
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} else if strings.Contains(tagStr, "totrue") {
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binding.Decoder = &ToBoolEncoder{binding.Decoder, true}
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}
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}
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}
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}
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func init() {
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json.RegisterExtension(&ApipostExtension{})
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API = jsoniterApi{}
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}
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var json = jsoniter.ConfigCompatibleWithStandardLibrary
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type jsoniterApi struct{}
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func (j jsoniterApi) Marshal(v any) ([]byte, error) {
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return json.Marshal(v)
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}
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func (j jsoniterApi) Unmarshal(data []byte, v any) error {
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return json.Unmarshal(data, v)
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}
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func (j jsoniterApi) MarshalIndent(v any, prefix, indent string) ([]byte, error) {
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return json.MarshalIndent(v, prefix, indent)
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}
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func (j jsoniterApi) NewEncoder(writer io.Writer) Encoder {
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return json.NewEncoder(writer)
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}
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func (j jsoniterApi) NewDecoder(reader io.Reader) Decoder {
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return json.NewDecoder(reader)
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}
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