Add support go-json, another drop-in json replacement. (#2680)

Co-authored-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Co-authored-by: thinkerou <thinkerou@gmail.com>

README.md

@@ -23,7 +23,7 @@ Gin is a web framework written in Go (Golang). It features a martini-like API wi
   - [Quick start](#quick-start)
   - [Benchmarks](#benchmarks)
   - [Gin v1. stable](#gin-v1-stable)
-  - [Build with jsoniter](#build-with-jsoniter)
+  - [Build with jsoniter/go-json](#build-with-json-replacement)
   - [API Examples](#api-examples)
     - [Using GET, POST, PUT, PATCH, DELETE and OPTIONS](#using-get-post-put-patch-delete-and-options)
     - [Parameters in path](#parameters-in-path)
@@ -182,13 +182,18 @@ Gin uses a custom version of [HttpRouter](https://github.com/julienschmidt/httpr
 - [x] Battle tested.
 - [x] API frozen, new releases will not break your code.
 
-## Build with [jsoniter](https://github.com/json-iterator/go)
+## Build with json replacement
 
-Gin uses `encoding/json` as default json package but you can change to [jsoniter](https://github.com/json-iterator/go) by build from other tags.
+Gin uses `encoding/json` as default json package but you can change it by build from other tags.
 
+[jsoniter](https://github.com/json-iterator/go)
 ```sh
 $ go build -tags=jsoniter .
 ```
+[go-json](https://github.com/goccy/go-json)
+```sh
+$ go build -tags=go_json .
+```
 
 ## API Examples
 
@@ -2215,3 +2220,4 @@ Awesome project lists using [Gin](https://github.com/gin-gonic/gin) web framewor
 * [picfit](https://github.com/thoas/picfit): An image resizing server written in Go.
 * [brigade](https://github.com/brigadecore/brigade): Event-based Scripting for Kubernetes.
 * [dkron](https://github.com/distribworks/dkron): Distributed, fault tolerant job scheduling system.
+

go.sum

@@ -11,6 +11,8 @@ github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD87
 github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
 github.com/go-playground/validator/v10 v10.4.1 h1:pH2c5ADXtd66mxoE0Zm9SUhxE20r7aM3F26W0hOn+GE=
 github.com/go-playground/validator/v10 v10.4.1/go.mod h1:nlOn6nFhuKACm19sB/8EGNn9GlaMV7XkbRSipzJ0Ii4=
+github.com/goccy/go-json v0.4.11 h1:92nyX606ZN/cUFwctfxwDWm8YWSA38Zlv9s7taFeLyo=
+github.com/goccy/go-json v0.4.11/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
 github.com/golang/protobuf v1.3.3 h1:gyjaxf+svBWX08ZjK86iN9geUJF0H6gp2IRKX6Nf6/I=
 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=

internal/json/go_json.go

@@ -0,0 +1,23 @@
+// Copyright 2017 Bo-Yi Wu.  All rights reserved.
+// Use of this source code is governed by a MIT style
+// license that can be found in the LICENSE file.
+
+//go:build go_json
+// +build go_json
+
+package json
+
+import json "github.com/goccy/go-json"
+
+var (
+	// Marshal is exported by gin/json package.
+	Marshal = json.Marshal
+	// Unmarshal is exported by gin/json package.
+	Unmarshal = json.Unmarshal
+	// MarshalIndent is exported by gin/json package.
+	MarshalIndent = json.MarshalIndent
+	// NewDecoder is exported by gin/json package.
+	NewDecoder = json.NewDecoder
+	// NewEncoder is exported by gin/json package.
+	NewEncoder = json.NewEncoder
+)

internal/json/json.go

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a MIT style
 // license that can be found in the LICENSE file.
 
-//go:build !jsoniter
-// +build !jsoniter
+//go:build !jsoniter && !go_json
+// +build !jsoniter,!go_json
 
 package json