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# [Gin Web Framework](https://github.com/gin-gonic/gin)

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Gin是一个使用Go语言写的web框架.它拥有与Martini相似的API,但它比Martini快40多倍.Gin内部使用 Golang最快的HTTP路由器[httprouter](https://github.com/julienschmidt/httprouter).如果你需要更高的性能,更快的开发效率,你会喜欢上Gin.

![Gin console logger](https://gin-gonic.github.io/gin/other/console.png)

项目地址[Gin Web Framework](https://github.com/gin-gonic/gin)

## 目录

- [快速开始](#quick-start)
- [性能基准](#benchmarks)
- [Gin v1.稳定版](#gin-v1-stable)
- [开始使用](#start-using-it)
- [使用jsoniter](#build-with-jsoniter)
- [API示例](#api-examples)
    - [GET,POST,PUT,PATCH,DELETE和OPTIONS](#using-get-post-put-patch-delete-and-options)
    - [url路径中的参数](#parameters-in-path)
    - [url中的查询参数](#querystring-parameters)
    - [Multipart/Urlencoded Form](#multiparturlencoded-form)
    - [url中查询参数+form表单数据](#another-example-query--post-form)
    - [文件上传](#upload-files)
    - [路由分组](#grouping-routes)
    - [不使用默认的中间件](#blank-gin-without-middleware-by-default)
    - [使用中间件](#using-middleware)
    - [如何编写日志文件](#how-to-write-log-file)
    - [模型绑定和验证](#model-binding-and-validation)
    - [自定义验证](#custom-validators)
    - [仅绑定查询字符串](#only-bind-query-string)
    - [绑定查询字符串或Post数据](#bind-query-string-or-post-data)
    - [绑定 HTML checkboxes](#bind-html-checkboxes)
    - [绑定 Multipart/Urlencoded](#multiparturlencoded-binding)
    - [XML, JSON 和 YAML 绑定](#xml-json-and-yaml-rendering)
    - [JSONP](#jsonp)
    - [静态文件](#serving-static-files)
    - [Serving data from reader](#serving-data-from-reader)
    - [HTML模板渲染](#html-rendering)
    - [Multitemplate](#multitemplate)
    - [重定向](#redirects)
    - [自定义中间件](#custom-middleware)
    - [使用 BasicAuth() 中间件](#using-basicauth-middleware)
    - [中间件内的Goroutines](#goroutines-inside-a-middleware)
    - [自定义HTTP配置](#custom-http-configuration)
    - [使用Let's Encrypt证书](#support-lets-encrypt)
    - [使用Gin运行多个服务](#run-multiple-service-using-gin)
    - [优雅的重启或停止](#graceful-restart-or-stop)
    - [用模板构建一个二进制文件](#build-a-single-binary-with-templates)
    - [使用自定义结构绑定表单数据请求](#bind-form-data-request-with-custom-struct)
    - [尝试将body绑定到不同的结构中](#try-to-bind-body-into-different-structs)
- [测试](#testing)
- [Users](#users--)

## Quick start 
## 快速开始

```sh
# 在example.go文件中假设有以下代码
$ cat example.go
```

```go
package main

import "github.com/gin-gonic/gin"

func main() {
	r := gin.Default()
	r.GET("/ping", func(c *gin.Context) {
		c.JSON(200, gin.H{
			"message": "pong",
		})
	})
	r.Run() // listen and serve on 0.0.0.0:8080
}
```

```
# 运行 example.go 并在浏览器中访问 0.0.0.0:8080/ping
$ go run example.go
```

## Benchmarks
## 基准测试

Gin 使用自定义版本的 [HttpRouter](https://github.com/julienschmidt/httprouter)

[查看所有测试结果](https://github.com/gin-gonic/gin/blob/master/BENCHMARKS.md)

Benchmark name                              | (1)        | (2)         | (3) 		    | (4)
--------------------------------------------|-----------:|------------:|-----------:|---------:
**BenchmarkGin_GithubAll**                  | **30000**  |  **48375**  |     **0**  |   **0**
BenchmarkAce_GithubAll                      |   10000    |   134059    |   13792    |   167
BenchmarkBear_GithubAll                     |    5000    |   534445    |   86448    |   943
BenchmarkBeego_GithubAll                    |    3000    |   592444    |   74705    |   812
BenchmarkBone_GithubAll                     |     200    |  6957308    |  698784    |  8453
BenchmarkDenco_GithubAll                    |   10000    |   158819    |   20224    |   167
BenchmarkEcho_GithubAll                     |   10000    |   154700    |    6496    |   203
BenchmarkGocraftWeb_GithubAll               |    3000    |   570806    |  131656    |  1686
BenchmarkGoji_GithubAll                     |    2000    |   818034    |   56112    |   334
BenchmarkGojiv2_GithubAll                   |    2000    |  1213973    |  274768    |  3712
BenchmarkGoJsonRest_GithubAll               |    2000    |   785796    |  134371    |  2737
BenchmarkGoRestful_GithubAll                |     300    |  5238188    |  689672    |  4519
BenchmarkGorillaMux_GithubAll               |     100    | 10257726    |  211840    |  2272
BenchmarkHttpRouter_GithubAll               |   20000    |   105414    |   13792    |   167
BenchmarkHttpTreeMux_GithubAll              |   10000    |   319934    |   65856    |   671
BenchmarkKocha_GithubAll                    |   10000    |   209442    |   23304    |   843
BenchmarkLARS_GithubAll                     |   20000    |    62565    |       0    |     0
BenchmarkMacaron_GithubAll                  |    2000    |  1161270    |  204194    |  2000
BenchmarkMartini_GithubAll                  |     200    |  9991713    |  226549    |  2325
BenchmarkPat_GithubAll                      |     200    |  5590793    | 1499568    | 27435
BenchmarkPossum_GithubAll                   |   10000    |   319768    |   84448    |   609
BenchmarkR2router_GithubAll                 |   10000    |   305134    |   77328    |   979
BenchmarkRivet_GithubAll                    |   10000    |   132134    |   16272    |   167
BenchmarkTango_GithubAll                    |    3000    |   552754    |   63826    |  1618
BenchmarkTigerTonic_GithubAll               |    1000    |  1439483    |  239104    |  5374
BenchmarkTraffic_GithubAll                  |     100    | 11383067    | 2659329    | 21848
BenchmarkVulcan_GithubAll                   |    5000    |   394253    |   19894    |   609

- (1): 持续时间达到的总重复次数越多，意味着结果越好
- (2): 单次重复持续时间（ns / op）越低越好
- (3): 堆内存（B / op）越低越好
- (4): 平均每次重复分配 (allocs/op) 越低越好

## Gin v1. stable

- [x] Zero allocation router.
- [x] Still the fastest http router and framework. From routing to writing.
- [x] Complete suite of unit tests
- [x] Battle tested
- [x] API frozen, new releases will not break your code.

## Start using it
## 开始使用

1. 下载并安装它:

```sh
$ go get github.com/gin-gonic/gin
```

2. 将其导入到您的代码中:

```go
import "github.com/gin-gonic/gin"
```

3. (可选的) 导入 `net/http`. 如果您要使用诸如`http.StatusOK`的常量.

```go
import "net/http"
```

### Use a vendor tool like [Govendor](https://github.com/kardianos/govendor)
### 使用包管理工具 [Govendor](https://github.com/kardianos/govendor)

1. 使用`go get`获取 `govendor`

```sh
$ go get github.com/kardianos/govendor
```
2. 创建并进入你的项目文件夹

```sh
$ mkdir -p $GOPATH/src/github.com/myusername/project && cd "$_"
```

3. 初始化你的项目并添加gin

```sh
$ govendor init
$ govendor fetch github.com/gin-gonic/gin@v1.2
```

4. 复制一个初始模板到你的项目中

```sh
$ curl https://raw.githubusercontent.com/gin-gonic/gin/master/examples/basic/main.go > main.go
```

5. 运行你的项目

```sh
$ go run main.go
```

## Build with [jsoniter](https://github.com/json-iterator/go)
## 使用[jsoniter](https://github.com/json-iterator/go)

Gin使用`dncoding/json` 作为默认的json包,但是你可以在构建的时候用[jsoniter](https://github.com/json-iterator/go) 替换它

```sh
$ go build -tags=jsoniter .
```

## API示例

### Using GET, POST, PUT, PATCH, DELETE and OPTIONS

```go
func main() {
	// 禁用控制台颜色
	// gin.DisableConsoleColor()

// 用默认的中间件创建一个gin路由器:
	// logger and recovery (crash-free) middleware
	// 记录 恢复(不崩溃) 中间件
	router := gin.Default()

router.GET("/someGet", getting)
	router.POST("/somePost", posting)
	router.PUT("/somePut", putting)
	router.DELETE("/someDelete", deleting)
	router.PATCH("/somePatch", patching)
	router.HEAD("/someHead", head)
	router.OPTIONS("/someOptions", options)

// By default it serves on :8080 unless a
	// PORT environment variable was defined.
	// 服务默认使用8080端口,除非你自定义了端口号的环境变量
	router.Run()
	// router.Run(":3000") 指定端口号为 :3000

}
```

### Parameters in path
### url路径中的参数

```go
func main() {
	router := gin.Default()

// 路由1 匹配 /user/john,但是不匹配 /user/ 或 /user
	router.GET("/user/:name", func(c *gin.Context) {
		name := c.Param("name")
		c.String(http.StatusOK, "Hello %s", name)
	})

// 路由2 这个会匹配 /user/john/ 和 /user/john/send
	router.GET("/user/:name/*action", func(c *gin.Context) {
		name := c.Param("name")
		action := c.Param("action")
		message := name + " is " + action
		c.String(http.StatusOK, message)
	})

// 注意 /user/:name 和 /user/:name/是俩个完全不同的路由

router.Run(":8080")
}
```
```bash
➜  ~ curl 127.0.0.1:8080/user/jack
Hello jack
➜  ~ curl 127.0.0.1:8080/user/jack/
jack is
➜  ~ curl 127.0.0.1:8080/user/jack/do
jack is /do
```

### Querystring parameters
### url中的查询参数
 如?q=123&key=789
```go
func main() {
	router := gin.Default()

// Query string parameters are parsed using the existing underlying request object.
	// 匹配url:  /welcome?firstname=Jane&lastname=Doe
	router.GET("/welcome", func(c *gin.Context) {
	    // 取firstname的值,不存在则设为Guest
		firstname := c.DefaultQuery("firstname", "Guest")
		lastname := c.Query("lastname") // shortcut for c.Request.URL.Query().Get("lastname")

c.String(http.StatusOK, "Hello %s %s", firstname, lastname)
	})
	router.Run(":8080")
}
```
```bash
➜  ~ curl -XGET "127.0.0.1:8080/welcome?firstname=Jane&lastname=Doe"
Hello Jane Doe
➜  ~ curl -XGET "127.0.0.1:8080/welcome"
Hello Guest
➜  ~ curl -XGET "127.0.0.1:8080/welcome?lastname=Doe"
Hello Guest Doe
```

### Multipart/Urlencoded Form

```go
func main() {
	router := gin.Default()

router.POST("/form_post", func(c *gin.Context) {
		message := c.PostForm("message")
		nick := c.DefaultPostForm("nick", "anonymous")

c.JSON(200, gin.H{
			"status":  "posted",
			"message": message,
			"nick":    nick,
		})
	})
	router.Run(":8080")
}
```
```bash
➜  ~ curl -X POST http://127.0.0.1:8080/form_post -F nick=bddbnet -F message=hello
{"message":"hello","nick":"bddbnet","status":"posted"}
➜  ~ curl -X POST http://127.0.0.1:8080/form_post  -F message=hello
{"message":"hello","nick":"anonymous","status":"posted"}
➜  ~ curl -X POST http://127.0.0.1:8080/form_post -F nick=bddbnet
{"message":"","nick":"bddbnet","status":"posted"}
```

### Another example: query + post form
### url中查询参数+form表单数据

```
POST /post?id=1234&page=1 HTTP/1.1
Content-Type: application/x-www-form-urlencoded

name=manu&message=this_is_great
```

```go
func main() {
	router := gin.Default()

router.POST("/post", func(c *gin.Context) {
		// url中查询数据
		id := c.Query("id")
		page := c.DefaultQuery("page", "0")

// post表单中数据
		name := c.PostForm("name")
		message := c.PostForm("message")

c.JSON(200, gin.H{
		  "status": 	"posted",
		  "id":			id,
		  "page":		page,
		  "name":    	name,
		  "message": 	message,
		})
		fmt.Printf("id: %s; page: %s; name: %s; message: %s", id, page, name, message)
	})
	router.Run(":8080")
}
```

```bash
➜  ~ curl -X POST 'http://127.0.0.1:8080/post?id=123&page=1' -F name=bddbnet -F message=hello
{"id":"123","message":"hello","name":"bddbnet","page":"1","status":"posted"}
➜  ~ curl -X POST 'http://127.0.0.1:8080/post?id=123' -F name=bddbnet -F message=hello
{"id":"123","message":"hello","name":"bddbnet","page":"0","status":"posted"}
➜  ~ curl -X POST 'http://127.0.0.1:8080/post' -F name=bddbnet -F message=hello
{"id":"","message":"hello","name":"bddbnet","page":"0","status":"posted"}
➜  ~ curl -X POST 'http://127.0.0.1:8080/post' -F name=bddbnet
{"id":"","message":"","name":"bddbnet","page":"0","status":"posted"}
```

### Upload files
### 文件上传

#### Single file
#### 单个文件

参考问题 [#774](https://github.com/gin-gonic/gin/issues/774) 和细节[example code](examples/upload-file/single).

```go
func main() {
	router := gin.Default()
	// Set a lower memory limit for multipart forms (default is 32 MiB)
	// router.MaxMultipartMemory = 8 << 20  // 8 MiB
	router.POST("/upload", func(c *gin.Context) {
		// single file
		file, _ := c.FormFile("file")
		log.Println(file.Filename)

savePath := "/tmp/"
		dst := savePath + file.Filename

// Upload the file to specific dst.
		err := c.SaveUploadedFile(file, dst)
		if err != nil {
		   panic(err)
		}

c.String(http.StatusOK, fmt.Sprintf("'%s' uploaded!", file.Filename))
	})
	router.Run(":8080")
}
```

```bash
➜  ~ curl -X POST http://localhost:8080/upload \
  -F "file=@/home/bddbnet/Pictures/bg002.jpg" \
  -H "Content-Type: multipart/form-data"
'bg002.jpg' uploaded!
```

#### Multiple files
#### 多个文件

See the detail [example code](examples/upload-file/multiple).

```go
func main() {
	router := gin.Default()
	// Set a lower memory limit for multipart forms (default is 32 MiB)
	// router.MaxMultipartMemory = 8 << 20  // 8 MiB
	router.POST("/upload", func(c *gin.Context) {
		// Multipart form
		form, _ := c.MultipartForm()
		files := form.File["upload[]"]
		savePath := "/tmp/"

for _, file := range files {
		   log.Println(file.Filename)

dst := savePath + file.Filename
		  // Upload the file to specific dst.
		  c.SaveUploadedFile(file, dst)
		}
		c.String(http.StatusOK, fmt.Sprintf("%d files uploaded!", len(files)))
	})
	router.Run(":8080")
}
```
```bash
curl -X POST http://localhost:8080/upload \
  -F "upload[]=@/Users/appleboy/test1.zip" \
  -F "upload[]=@/Users/appleboy/test2.zip" \
  -H "Content-Type: multipart/form-data"
2 files uploaded!
```

### Grouping routes
### 路由分组

```go
func main() {
	router := gin.Default()

// Simple group: v1
	v1 := router.Group("/v1")
	{
		v1.POST("/login", loginEndpoint)
		v1.POST("/submit", submitEndpoint)
		v1.POST("/read", readEndpoint)
	}

// Simple group: v2
	v2 := router.Group("/v2")
	{
		v2.POST("/login", loginEndpoint)
		v2.POST("/submit", submitEndpoint)
		v2.POST("/read", readEndpoint)
	}

router.Run(":8080")
}
```
### Blank Gin without middleware by default
### 不使用默认的中间件

用

```go
r := gin.New()
```

替代

```go
// Default With the Logger and Recovery middleware already attached
// 默认情况已启用了log和恢复中间件
r := gin.Default()
```

### Using middleware
### 使用中间件
```go
func main() {
	// 默认情况下创建一个没有任何中间件的路由器
	r := gin.New()

// Global middleware
	// Logger middleware will write the logs to gin.DefaultWriter even if you set with GIN_MODE=release.
	// By default gin.DefaultWriter = os.Stdout
	r.Use(gin.Logger())

// Recovery middleware recovers from any panics and writes a 500 if there was one.
	r.Use(gin.Recovery())

// 每个路由中,你可以使用任意多个中间件.
	r.GET("/benchmark", MyBenchLogger(), benchEndpoint)

// 权限组
	// authorized := r.Group("/", AuthRequired())
	// 等同于:
	authorized := r.Group("/")
	// 在这组路由中,我们使用自定义的中间件
	// AuthRequired() 中间件只在 "authorized" 组中使用.
	authorized.Use(AuthRequired())
	{
		authorized.POST("/login", loginEndpoint)
		authorized.POST("/submit", submitEndpoint)
		authorized.POST("/read", readEndpoint)

// 嵌套组
		testing := authorized.Group("testing")
		testing.GET("/analytics", analyticsEndpoint)
	}

// Listen and serve on 0.0.0.0:8080
	r.Run(":8080")
}
```

### How to write log file
### 如何写日志文件
```go
func main() {

// 禁用控制台颜色,写入日志文件时不需要添加颜色
    gin.DisableConsoleColor()

// 写入到文件.
    f, _ := os.Create("gin.log")
    gin.DefaultWriter = io.MultiWriter(f)

// 如果您需要同时将日志写入文件和控制台，请使用以下代码
    // gin.DefaultWriter = io.MultiWriter(f, os.Stdout)

router := gin.Default()
    router.GET("/ping", func(c *gin.Context) {
        c.String(200, "pong")
    })

router.Run(":8080")
}
```

### Model binding and validation
### 模型绑定和验证

使用模型绑定,将请求主体绑定到一个类型.我们目前支持JSON的绑定,XML和标准表单值(foo=bar&boo=baz).

Gin 采用 [**go-playground/validator.v8**](https://github.com/go-playground/validator)进行验证. 点击 [这里](http://godoc.org/gopkg.in/go-playground/validator.v8#hdr-Baked_In_Validators_and_Tags)查看所有文档.

请注意,您需要在所有要绑定的字段上设置相应的绑定标签.例如从JSON绑定时, 添加结构体字段标签 `json:"fieldname"`.

此外，Gin提供了两种绑定方法:
- **种类** - Must bind
  - **方法** - `Bind`, `BindJSON`, `BindQuery`
  - **特性** - 这些方法在底层使用`MustBindWith`。如果存在绑定错误，则使用`c.AbortWithError（400，err）.SetType（ErrorTypeBind）`中止请求。这将响应状态码设置为400，并且将`Content-Type`标头设置为`text/plain; charset=utf-8`。请注意，如果您尝试在此之后设置响应代码，则会导致警告`[GIN-debug] [WARNING] Headers were already written(请求头已经设置). Wanted to override status code 400 with 422(企图用422覆盖状态码400)`。如果你希望更好地控制行为，可以考虑使用`ShouldBind`等价的方法。

- **种类** - Should bind
  - **方法** - `ShouldBind`, `ShouldBindJSON`, `ShouldBindQuery`
  - **特性** - 这些方法使用`ShouldBindWith`。如果存在绑定错误，则返回错误，并且开发人员有责任正确处理请求和错误

使用绑定方法时, Gin试图根据Content-Type头推断绑定数据的类型. 如果你能够确认绑定数据的类型, 可以使用 `MustBindWith` 或 `ShouldBindWith`绑定数据.

你可以指定需要绑定数据的字段. 如果这个字段存在这个 `binding:"required"`的结构体字段标签并且在绑定时字段的值为空值时, 将会返回一个错误.

```go
// Binding from JSON
type Login struct {
	User     string `form:"user" json:"user" binding:"required"`
	Password string `form:"password" json:"password" binding:"required"`
}

func main() {
	router := gin.Default()

// Example for binding JSON ({"user": "manu", "password": "123"})
	router.POST("/loginJSON", func(c *gin.Context) {
		var json Login
		if err := c.ShouldBindJSON(&json); err == nil {
			if json.User == "manu" && json.Password == "123" {
				c.JSON(http.StatusOK, gin.H{"status": "you are logged in"})
			} else {
				c.JSON(http.StatusUnauthorized, gin.H{"status": "unauthorized"})
			}
		} else {
			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		}
	})

// Example for binding a HTML form (user=manu&password=123)
	router.POST("/loginForm", func(c *gin.Context) {
		var form Login
		// This will infer what binder to use depending on the content-type header.
		if err := c.ShouldBind(&form); err == nil {
			if form.User == "manu" && form.Password == "123" {
				c.JSON(http.StatusOK, gin.H{"status": "you are logged in"})
			} else {
				c.JSON(http.StatusUnauthorized, gin.H{"status": "unauthorized"})
			}
		} else {
			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		}
	})

// Listen and serve on 0.0.0.0:8080
	router.Run(":8080")
}
```

**Sample request**
```shell
$ curl -v -X POST \
  http://localhost:8080/loginJSON \
  -H 'content-type: application/json' \
  -d '{ "user": "manu" }'
> POST /loginJSON HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.51.0
> Accept: */*
> content-type: application/json
> Content-Length: 18
>
* upload completely sent off: 18 out of 18 bytes
< HTTP/1.1 400 Bad Request
< Content-Type: application/json; charset=utf-8
< Date: Fri, 04 Aug 2017 03:51:31 GMT
< Content-Length: 100
<
{"error":"Key: 'Login.Password' Error:Field validation for 'Password' failed on the 'required' tag"}
```

### Custom Validators
### 自定义验证

你也可以注册自定义验证器. 点这里查看 [例子](examples/custom-validation/server.go).

[embedmd]:# (examples/custom-validation/server.go go)
```go
package main

import (
	"net/http"
	"reflect"
	"time"

"github.com/gin-gonic/gin"
	"github.com/gin-gonic/gin/binding"
	"gopkg.in/go-playground/validator.v8"
)

type Booking struct {
	CheckIn  time.Time `form:"check_in" binding:"required,bookabledate" time_format:"2006-01-02"`
	CheckOut time.Time `form:"check_out" binding:"required,gtfield=CheckIn" time_format:"2006-01-02"`
}

func bookableDate(
	v *validator.Validate, topStruct reflect.Value, currentStructOrField reflect.Value,
	field reflect.Value, fieldType reflect.Type, fieldKind reflect.Kind, param string,
) bool {
	if date, ok := field.Interface().(time.Time); ok {
		today := time.Now()
		if today.Year() > date.Year() || today.YearDay() > date.YearDay() {
			return false
		}
	}
	return true
}

func main() {
	route := gin.Default()

if v, ok := binding.Validator.Engine().(*validator.Validate); ok {
		v.RegisterValidation("bookabledate", bookableDate)
	}

route.GET("/bookable", getBookable)
	route.Run(":8085")
}

func getBookable(c *gin.Context) {
	var b Booking
	if err := c.ShouldBindWith(&b, binding.Query); err == nil {
		c.JSON(http.StatusOK, gin.H{"message": "Booking dates are valid!"})
	} else {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
	}
}
```

```console
$ curl "localhost:8085/bookable?check_in=2018-04-16&check_out=2018-04-17"
{"message":"Booking dates are valid!"}

$ curl "localhost:8085/bookable?check_in=2018-03-08&check_out=2018-03-09"
{"error":"Key: 'Booking.CheckIn' Error:Field validation for 'CheckIn' failed on the 'bookabledate' tag"}
```

[结构级别验证](https://github.com/go-playground/validator/releases/tag/v8.7) 也可以用这种方式注册.
点击这里查看 [例子](examples/struct-lvl-validations) .

### Only Bind Query String
### 仅绑定Url查询字符串

`ShouldBindQuery` 函数只绑定查询参数而不是post的数据. 详情点击这里 [查看](https://github.com/gin-gonic/gin/issues/742#issuecomment-315953017).

```go
package main

import (
	"log"

"github.com/gin-gonic/gin"
)

type Person struct {
	Name    string `form:"name"`
	Address string `form:"address"`
}

func main() {
	route := gin.Default()
	route.Any("/testing", startPage)
	route.Run(":8085")
}

func startPage(c *gin.Context) {
	var person Person
	if c.ShouldBindQuery(&person) == nil {
		log.Println("====== Only Bind By Query String ======")
		log.Println(person.Name)
		log.Println(person.Address)
	}
	c.JSON(http.StatusOK, gin.H{"Name": person.Name, "Address": person.Address})
}

```
```bash
~ curl 'http://127.0.0.1:8080/testing?name=tom&address=none'
{"Address":"none","Name":"tom"}
```

### Bind Query String or Post Data
### 绑定Url查询字符串或Post的数据

详情见 [这里](https://github.com/gin-gonic/gin/issues/742#issuecomment-264681292).

```go
package main

import "log"
import "github.com/gin-gonic/gin"
import "time"

type Person struct {
	Name     string    `form:"name"`
	Address  string    `form:"address"`
	Birthday time.Time `form:"birthday" time_format:"2006-01-02" time_utc:"1"`
}

func main() {
	route := gin.Default()
	route.GET("/testing", startPage)
	route.Run(":8085")
}

func startPage(c *gin.Context) {
	var person Person
	// If `GET`, only `Form` binding engine (`query`) used.
	// If `POST`, first checks the `content-type` for `JSON` or `XML`, then uses `Form` (`form-data`).
	// See more at https://github.com/gin-gonic/gin/blob/master/binding/binding.go#L48
	if c.ShouldBind(&person) == nil {
		log.Println(person.Name)
		log.Println(person.Address)
		log.Println(person.Birthday)
	}

c.String(200, "Success")
}
```

Test it with:
```sh
$ curl -X GET "localhost:8085/testing?name=appleboy&address=xyz&birthday=1992-03-15"
```

### Bind HTML checkboxes
### 绑定 HTML checkboxes

See the [detail information](https://github.com/gin-gonic/gin/issues/129#issuecomment-124260092)

main.go

```go
...

type myForm struct {
    Colors []string `form:"colors[]"`
}

...

func formHandler(c *gin.Context) {
    var fakeForm myForm
    c.ShouldBind(&fakeForm)
    c.JSON(200, gin.H{"color": fakeForm.Colors})
}

...

```

form.html

```html
<form action="/" method="POST">
    <p>Check some colors</p>
    <label for="red">Red</label>
    <input type="checkbox" name="colors[]" value="red" id="red" />
    <label for="green">Green</label>
    <input type="checkbox" name="colors[]" value="green" id="green" />
    <label for="blue">Blue</label>
    <input type="checkbox" name="colors[]" value="blue" id="blue" />
    <input type="submit" />
</form>
```

result:

```
{"color":["red","green","blue"]}
```

### Multipart/Urlencoded binding
### 绑定 Multipart/Urlencoded

```go
package main

import (
	"github.com/gin-gonic/gin"
)

type LoginForm struct {
	User     string `form:"user" binding:"required"`
	Password string `form:"password" binding:"required"`
}

func main() {
	router := gin.Default()
	router.POST("/login", func(c *gin.Context) {
		// you can bind multipart form with explicit binding declaration:
		// c.ShouldBindWith(&form, binding.Form)
		// or you can simply use autobinding with ShouldBind method:
		var form LoginForm
		// in this case proper binding will be automatically selected
		if c.ShouldBind(&form) == nil {
			if form.User == "user" && form.Password == "password" {
				c.JSON(200, gin.H{"status": "you are logged in"})
			} else {
				c.JSON(401, gin.H{"status": "unauthorized"})
			}
		}
	})
	router.Run(":8080")
}
```

Test it with:
```sh
$ curl -v --form user=user --form password=password http://localhost:8080/login
```

### XML, JSON and YAML rendering
### XML, JSON and YAML 绑定

```go
func main() {
	r := gin.Default()

// gin.H is a shortcut for map[string]interface{}
	r.GET("/someJSON", func(c *gin.Context) {
		c.JSON(http.StatusOK, gin.H{"message": "hey", "status": http.StatusOK})
	})

r.GET("/moreJSON", func(c *gin.Context) {
		// You also can use a struct
		var msg struct {
			Name    string `json:"user"`
			Message string
			Number  int
		}
		msg.Name = "Lena"
		msg.Message = "hey"
		msg.Number = 123
		// Note that msg.Name becomes "user" in the JSON
		// Will output  :   {"user": "Lena", "Message": "hey", "Number": 123}
		c.JSON(http.StatusOK, msg)
	})

r.GET("/someXML", func(c *gin.Context) {
		c.XML(http.StatusOK, gin.H{"message": "hey", "status": http.StatusOK})
	})

r.GET("/someYAML", func(c *gin.Context) {
		c.YAML(http.StatusOK, gin.H{"message": "hey", "status": http.StatusOK})
	})

// Listen and serve on 0.0.0.0:8080
	r.Run(":8080")
}
```

#### SecureJSON

使用SecureJSON来防止json劫持. 如果返回的结果是数组则会在返回数据前添加默认的前缀 `"while(1),"`.

```go
func main() {
	r := gin.Default()

// 你也可以自定义你自己的安全json前缀
	// r.SecureJsonPrefix(")]}',\n")

r.GET("/someJSON", func(c *gin.Context) {
		names := []string{"lena", "austin", "foo"}

// Will output  :   while(1);["lena","austin","foo"]
		c.SecureJSON(http.StatusOK, names)
	})

// Listen and serve on 0.0.0.0:8080
	r.Run(":8080")
}
```
```bash
➜  hosttodo curl 'http://127.0.0.1:8080/someJSON' 
while(1);["lena","austin","foo"]
```

#### JSONP

使用JSONP从不同域中的服务器请求数据。如果查询参数回调存在，请将回调添加到响应主体。

```go
func main() {
	r := gin.Default()
	
	// 这里假定访问的url地址是 /JSONP?callback=x
	// url中必须存在callback= 才会返回jsonp,否则返回json
	r.GET("/JSONP", func(c *gin.Context) {
		data := map[string]interface{}{
			"foo": "bar",
		}

//callback is x
		// Will output  :   x({\"foo\":\"bar\"})
		c.JSONP(http.StatusOK, data)
	})

// Listen and serve on 0.0.0.0:8080
	r.Run(":8080")
}
```
```bash
➜  ~ curl 'http://127.0.0.1:8080/JSONP?callback=x'
x({"foo":"bar"})
➜  ~ curl 'http://127.0.0.1:8080/JSONP?call=x'    
{"foo":"bar"}
```

### Serving static files
### 静态文件

```go
func main() {
	router := gin.Default()
	router.Static("/assets", "./assets")
	router.StaticFS("/more_static", http.Dir("my_file_system"))
	router.StaticFile("/favicon.ico", "./resources/favicon.ico")

// Listen and serve on 0.0.0.0:8080
	router.Run(":8080")
}
```

### Serving data from reader

```go
func main() {
	router := gin.Default()
	router.GET("/someDataFromReader", func(c *gin.Context) {
		response, err := http.Get("https://raw.githubusercontent.com/gin-gonic/logo/master/color.png")
		if err != nil || response.StatusCode != http.StatusOK {
			c.Status(http.StatusServiceUnavailable)
			return
		}

reader := response.Body
		contentLength := response.ContentLength
		contentType := response.Header.Get("Content-Type")

extraHeaders := map[string]string{
			"Content-Disposition": `attachment; filename="gopher.png"`,
		}

c.DataFromReader(http.StatusOK, contentLength, contentType, reader, extraHeaders)
	})
	router.Run(":8080")
}
```

### HTML rendering
### HTML模板渲染

用 LoadHTMLGlob() 或 LoadHTMLFiles() 函数加载模板文件

```go
func main() {
	router := gin.Default()
	
	// 加载所有的模板文件
	router.LoadHTMLGlob("templates/*")
	
	// 加载某个模板文件
	// router.LoadHTMLFiles("templates/template1.html", "templates/template2.html")
	
	router.GET("/index", func(c *gin.Context) {
		c.HTML(http.StatusOK, "index.tmpl", gin.H{
			"title": "Main website",
		})
	})
	router.Run(":8080")
}
```

templates/index.tmpl

```html
<html>
	<h1>
		{{ .title }}
	</h1>
</html>
```

使用不同目录中具有相同名称的模板

```go
func main() {
	router := gin.Default()
	router.LoadHTMLGlob("templates/**/*")
	router.GET("/posts/index", func(c *gin.Context) {
		c.HTML(http.StatusOK, "posts/index.tmpl", gin.H{
			"title": "Posts",
		})
	})
	router.GET("/users/index", func(c *gin.Context) {
		c.HTML(http.StatusOK, "users/index.tmpl", gin.H{
			"title": "Users",
		})
	})
	router.Run(":8080")
}
```

templates/posts/index.tmpl

```html
{{ define "posts/index.tmpl" }}
<html><h1>
	{{ .title }}
</h1>
<p>Using posts/index.tmpl</p>
</html>
{{ end }}
```

templates/users/index.tmpl

```html
{{ define "users/index.tmpl" }}
<html><h1>
	{{ .title }}
</h1>
<p>Using users/index.tmpl</p>
</html>
{{ end }}
```

#### Custom Template renderer
#### 自定义模板渲染

你也可以自己定义模板渲染方式
```go
import "html/template"

func main() {
	router := gin.Default()
	html := template.Must(template.ParseFiles("file1", "file2"))
	router.SetHTMLTemplate(html)
	router.Run(":8080")
}
```

#### Custom Delimiters
#### 自定义分隔符

你可以自己定义分隔符

```go
	r := gin.Default()
	r.Delims("{[{", "}]}")
	r.LoadHTMLGlob("/path/to/templates"))
```

#### Custom Template Funcs
#### 自定义模板函数

细节看 [这里](examples/template).

main.go

```go
import (
    "fmt"
    "html/template"
    "net/http"
    "time"

"github.com/gin-gonic/gin"
)

// 定义了一个函数
func formatAsDate(t time.Time) string {
    year, month, day := t.Date()
    return fmt.Sprintf("%d%02d/%02d", year, month, day)
}

func main() {
    router := gin.Default()
    // 设置分隔符
    router.Delims("{[{", "}]}")
    // 注册函数
    router.SetFuncMap(template.FuncMap{
        "formatAsDate": formatAsDate,
    })
    router.LoadHTMLFiles("./fixtures/basic/raw.tmpl")

router.GET("/raw", func(c *gin.Context) {
        c.HTML(http.StatusOK, "raw.tmpl", map[string]interface{}{
            "now": time.Date(2017, 07, 01, 0, 0, 0, 0, time.UTC),
        })
    })

router.Run(":8080")
}

```

raw.tmpl

```html
// 使用formatAsDate函数
Date: {[{.now | formatAsDate}]}
```

Result:
```
Date: 2017/07/01
```

### Multitemplate
### 使用多个模板文件

Gin 默认情况下只允许使用一个模板文件. 点击 [这里](https://github.com/gin-contrib/multitemplate) 看如何使用如 go 1.6 `block template`来实现多模板渲染.

### Redirects
### 重定向

HTTP重定向实现很容易:

```go
r.GET("/test", func(c *gin.Context) {
    // 重定向 
	c.Redirect(http.StatusMovedPermanently, "http://www.google.com/")
})
```
站内站外的重定向都被支持

### Custom Middleware
### 自定义中间件

```go
// 定义一个Looger中间件
func Logger() gin.HandlerFunc {
	return func(c *gin.Context) {
		t := time.Now()

// Set example variable
		c.Set("example", "12345")

// request请求之前做什么的代码写在这里

c.Next()

// request请求之后做什么的代码写在这里
		latency := time.Since(t)
		log.Print(latency)

// 获取我们正在发送的状态
		status := c.Writer.Status()
		log.Println(status)
	}
}

func main() {
	r := gin.New()
	// 使用中间件
	r.Use(Logger())

r.GET("/test", func(c *gin.Context) {
	    // 获取中间件设置的变量
		example := c.MustGet("example").(string)

// it would print: "12345"
		log.Println(example)
	})

// Listen and serve on 0.0.0.0:8080
	r.Run(":8080")
}
```

### Using BasicAuth() middleware
### 使用认证中间件

```go
// 模拟一些私有数据
var secrets = gin.H{
	"foo":    gin.H{"email": "foo@bar.com", "phone": "123433"},
	"austin": gin.H{"email": "austin@example.com", "phone": "666"},
	"lena":   gin.H{"email": "lena@guapa.com", "phone": "523443"},
}

func main() {
	r := gin.Default()

// Group using gin.BasicAuth() middleware
	// gin.Accounts is a shortcut for map[string]string
	authorized := r.Group("/admin", gin.BasicAuth(gin.Accounts{
		"foo":    "bar",
		"austin": "1234",
		"lena":   "hello2",
		"manu":   "4321",
	}))

// /admin/secrets endpoint
	// hit "localhost:8080/admin/secrets
	authorized.GET("/secrets", func(c *gin.Context) {
		// get user, it was set by the BasicAuth middleware
		user := c.MustGet(gin.AuthUserKey).(string)
		if secret, ok := secrets[user]; ok {
			c.JSON(http.StatusOK, gin.H{"user": user, "secret": secret})
		} else {
			c.JSON(http.StatusOK, gin.H{"user": user, "secret": "NO SECRET :("})
		}
	})

// Listen and serve on 0.0.0.0:8080
	r.Run(":8080")
}
```

### Goroutines inside a middleware
### 中间件内的Goroutines

在中间件或处理程序中启动新的Goroutines时, 你 **一定不要** 使用它内部的原始上下文, 你必须使用只读副本.

```go
func main() {
	r := gin.Default()

// 异步执行
	r.GET("/long_async", func(c *gin.Context) {
		// create copy to be used inside the goroutine
		cCp := c.Copy()
		go func() {
			// 模拟一个耗时任务
			time.Sleep(5 * time.Second)

// 一定要使用复制的cCp
			log.Println("Done! in path " + cCp.Request.URL.Path)
		}()
	})

// 同步执行
	r.GET("/long_sync", func(c *gin.Context) {
		// simulate a long task with time.Sleep(). 5 seconds
		time.Sleep(5 * time.Second)

// 不使用Goroutines则不需要复制
		log.Println("Done! in path " + c.Request.URL.Path)
	})

// Listen and serve on 0.0.0.0:8080
	r.Run(":8080")
}
```

### Custom HTTP configuration
### 自定义HTTP配置

Use `http.ListenAndServe()` directly, like this:

```go
func main() {
	router := gin.Default()
	http.ListenAndServe(":8080", router)
}
```
or

```go
func main() {
	router := gin.Default()

s := &http.Server{
		Addr:           ":8080",
		Handler:        router,
		ReadTimeout:    10 * time.Second,
		WriteTimeout:   10 * time.Second,
		MaxHeaderBytes: 1 << 20,
	}
	s.ListenAndServe()
}
```

### Support Let's Encrypt
### 使用Let's Encrypt证书

1行代码实现 LetsEncrypt HTTPS服务器.

[embedmd]:# (examples/auto-tls/example1/main.go go)
```go
package main

import (
	"log"

"github.com/gin-gonic/autotls"
	"github.com/gin-gonic/gin"
)

func main() {
	r := gin.Default()

// Ping handler
	r.GET("/ping", func(c *gin.Context) {
		c.String(200, "pong")
	})
    
	log.Fatal(autotls.Run(r, "example1.com", "example2.com"))
}
```

自定义autocert管理器的示例.

[embedmd]:# (examples/auto-tls/example2/main.go go)
```go
package main

import (
	"log"

"github.com/gin-gonic/autotls"
	"github.com/gin-gonic/gin"
	"golang.org/x/crypto/acme/autocert"
)

func main() {
	r := gin.Default()

// Ping handler
	r.GET("/ping", func(c *gin.Context) {
		c.String(200, "pong")
	})

m := autocert.Manager{
		Prompt:     autocert.AcceptTOS,
		HostPolicy: autocert.HostWhitelist("example1.com", "example2.com"),
		Cache:      autocert.DirCache("/var/www/.cache"),
	}

log.Fatal(autotls.RunWithManager(r, &m))
}
```

### Run multiple service using Gin
### 使用Gin运行多个服务

请参阅[问题](https://github.com/gin-gonic/gin/issues/346)并尝试以下示例：

[embedmd]:# (examples/multiple-service/main.go go)
```go
package main

import (
	"log"
	"net/http"
	"time"

"github.com/gin-gonic/gin"
	"golang.org/x/sync/errgroup"
)

var (
	g errgroup.Group
)

func router01() http.Handler {
	e := gin.New()
	e.Use(gin.Recovery())
	e.GET("/", func(c *gin.Context) {
		c.JSON(
			http.StatusOK,
			gin.H{
				"code":  http.StatusOK,
				"error": "Welcome server 01",
			},
		)
	})

return e
}

func router02() http.Handler {
	e := gin.New()
	e.Use(gin.Recovery())
	e.GET("/", func(c *gin.Context) {
		c.JSON(
			http.StatusOK,
			gin.H{
				"code":  http.StatusOK,
				"error": "Welcome server 02",
			},
		)
	})

return e
}

func main() {
	server01 := &http.Server{
		Addr:         ":8080",
		Handler:      router01(),
		ReadTimeout:  5 * time.Second,
		WriteTimeout: 10 * time.Second,
	}

server02 := &http.Server{
		Addr:         ":8081",
		Handler:      router02(),
		ReadTimeout:  5 * time.Second,
		WriteTimeout: 10 * time.Second,
	}

g.Go(func() error {
		return server01.ListenAndServe()
	})

g.Go(func() error {
		return server02.ListenAndServe()
	})

if err := g.Wait(); err != nil {
		log.Fatal(err)
	}
}
```

### Graceful restart or stop
### 优雅的重启或停止

以下方式可以让你优雅的重启或停止你的web服务器。

我们可以用 [fvbock/endless](https://github.com/fvbock/endless) 取代默认的 `ListenAndServe`. 请参阅 [问题#296](https://github.com/gin-gonic/gin/issues/296)获得更多细节.

```go
router := gin.Default()
router.GET("/", handler)
// [...]
endless.ListenAndServe(":4242", router)
```

其他的替代方案:

* [manners](https://github.com/braintree/manners): A polite Go HTTP server that shuts down gracefully.
* [graceful](https://github.com/tylerb/graceful): Graceful is a Go package enabling graceful shutdown of an http.Handler server.
* [grace](https://github.com/facebookgo/grace): Graceful restart & zero downtime deploy for Go servers.

If you are using Go 1.8, you may not need to use this library! Consider using http.Server's built-in [Shutdown()](https://golang.org/pkg/net/http/#Server.Shutdown) method for graceful shutdowns. See the full [graceful-shutdown](./examples/graceful-shutdown) example with gin.

[embedmd]:# (examples/graceful-shutdown/graceful-shutdown/server.go go)
```go
// +build go1.8

package main

import (
	"context"
	"log"
	"net/http"
	"os"
	"os/signal"
	"time"

"github.com/gin-gonic/gin"
)

func main() {
	router := gin.Default()
	router.GET("/", func(c *gin.Context) {
		time.Sleep(5 * time.Second)
		c.String(http.StatusOK, "Welcome Gin Server")
	})

srv := &http.Server{
		Addr:    ":8080",
		Handler: router,
	}

go func() {
		// service connections
		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("listen: %s\n", err)
		}
	}()

// Wait for interrupt signal to gracefully shutdown the server with
	// a timeout of 5 seconds.
	quit := make(chan os.Signal)
	signal.Notify(quit, os.Interrupt)
	<-quit
	log.Println("Shutdown Server ...")

ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	if err := srv.Shutdown(ctx); err != nil {
		log.Fatal("Server Shutdown:", err)
	}
	log.Println("Server exiting")
}
```

### Build a single binary with templates
### 将服务器构建为一个包含模板文件的二进制文件

您可以通过使用[go-assets](https://github.com/jessevdk/go-assets)，将服务器构建为包含模板的单个二进制文件

```go
func main() {
	r := gin.New()

t, err := loadTemplate()
	if err != nil {
		panic(err)
	}
	r.SetHTMLTemplate(t)

r.GET("/", func(c *gin.Context) {
		c.HTML(http.StatusOK, "/html/index.tmpl",nil)
	})
	r.Run(":8080")
}

// loadTemplate loads templates embedded by go-assets-builder
func loadTemplate() (*template.Template, error) {
	t := template.New("")
	for name, file := range Assets.Files {
		if file.IsDir() || !strings.HasSuffix(name, ".tmpl") {
			continue
		}
		h, err := ioutil.ReadAll(file)
		if err != nil {
			return nil, err
		}
		t, err = t.New(name).Parse(string(h))
		if err != nil {
			return nil, err
		}
	}
	return t, nil
}
```

See a complete example in the `examples/assets-in-binary` directory.

### Bind form-data request with custom struct
### 使用自定义结构绑定表单数据

以下使用自定义结构的示例:

```go
type StructA struct {
    FieldA string `form:"field_a"`
}

type StructB struct {
    NestedStruct StructA
    FieldB string `form:"field_b"`
}

type StructC struct {
    NestedStructPointer *StructA
    FieldC string `form:"field_c"`
}

type StructD struct {
    NestedAnonyStruct struct {
        FieldX string `form:"field_x"`
    }
    FieldD string `form:"field_d"`
}

func GetDataB(c *gin.Context) {
    var b StructB
    c.Bind(&b)
    c.JSON(200, gin.H{
        "a": b.NestedStruct,
        "b": b.FieldB,
    })
}

func GetDataC(c *gin.Context) {
    var b StructC
    c.Bind(&b)
    c.JSON(200, gin.H{
        "a": b.NestedStructPointer,
        "c": b.FieldC,
    })
}

func GetDataD(c *gin.Context) {
    var b StructD
    c.Bind(&b)
    c.JSON(200, gin.H{
        "x": b.NestedAnonyStruct,
        "d": b.FieldD,
    })
}

func main() {
    r := gin.Default()
    r.GET("/getb", GetDataB)
    r.GET("/getc", GetDataC)
    r.GET("/getd", GetDataD)

r.Run()
}
```

Using the command `curl` command result:

```
$ curl "http://localhost:8080/getb?field_a=hello&field_b=world"
{"a":{"FieldA":"hello"},"b":"world"}
$ curl "http://localhost:8080/getc?field_a=hello&field_c=world"
{"a":{"FieldA":"hello"},"c":"world"}
$ curl "http://localhost:8080/getd?field_x=hello&field_d=world"
{"d":"world","x":{"FieldX":"hello"}}
```

**NOTE**: NOT support the follow style struct:

```go
type StructX struct {
    X struct {} `form:"name_x"` // HERE have form
}

type StructY struct {
    Y StructX `form:"name_y"` // HERE hava form
}

type StructZ struct {
    Z *StructZ `form:"name_z"` // HERE hava form
}
```

In a word, only support nested custom struct which have no `form` now.

### Try to bind body into different structs
### 尝试将body绑定到不同的结构中

The normal methods for binding request body consumes `c.Request.Body` and they
cannot be called multiple times.

```go
type formA struct {
  Foo string `json:"foo" xml:"foo" binding:"required"`
}

type formB struct {
  Bar string `json:"bar" xml:"bar" binding:"required"`
}

func SomeHandler(c *gin.Context) {
  objA := formA{}
  objB := formB{}
  // This c.ShouldBind consumes c.Request.Body and it cannot be reused.
  if errA := c.ShouldBind(&objA); errA == nil {
    c.String(http.StatusOK, `the body should be formA`)
  // Always an error is occurred by this because c.Request.Body is EOF now.
  } else if errB := c.ShouldBind(&objB); errB == nil {
    c.String(http.StatusOK, `the body should be formB`)
  } else {
    ...
  }
}
```

For this, you can use `c.ShouldBindBodyWith`.

```go
func SomeHandler(c *gin.Context) {
  objA := formA{}
  objB := formB{}
  // This reads c.Request.Body and stores the result into the context.
  if errA := c.ShouldBindBodyWith(&objA, binding.JSON); errA == nil {
    c.String(http.StatusOK, `the body should be formA`)
  // At this time, it reuses body stored in the context.
  } else if errB := c.ShouldBindBodyWith(&objB, binding.JSON); errB == nil {
    c.String(http.StatusOK, `the body should be formB JSON`)
  // And it can accepts other formats
  } else if errB2 := c.ShouldBindBodyWith(&objB, binding.XML); errB2 == nil {
    c.String(http.StatusOK, `the body should be formB XML`)
  } else {
    ...
  }
}
```

* `c.ShouldBindBodyWith` stores body into the context before binding. This has
a slight impact to performance, so you should not use this method if you are
enough to call binding at once.
* This feature is only needed for some formats -- `JSON`, `XML`, `MsgPack`,
`ProtoBuf`. For other formats, `Query`, `Form`, `FormPost`, `FormMultipart`,
can be called by `c.ShouldBind()` multiple times without any damage to
performance (See [#1341](https://github.com/gin-gonic/gin/pull/1341)).

## Testing
## 测试

The `net/http/httptest` package is preferable way for HTTP testing.

```go
package main

func setupRouter() *gin.Engine {
	r := gin.Default()
	r.GET("/ping", func(c *gin.Context) {
		c.String(200, "pong")
	})
	return r
}

func main() {
	r := setupRouter()
	r.Run(":8080")
}
```

Test for code example above:

```go
package main

import (
	"net/http"
	"net/http/httptest"
	"testing"

"github.com/stretchr/testify/assert"
)

func TestPingRoute(t *testing.T) {
	router := setupRouter()

w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/ping", nil)
	router.ServeHTTP(w, req)

assert.Equal(t, 200, w.Code)
	assert.Equal(t, "pong", w.Body.String())
}
```

## Users  [![Sourcegraph](https://sourcegraph.com/github.com/gin-gonic/gin/-/badge.svg)](https://sourcegraph.com/github.com/gin-gonic/gin?badge)

Awesome project lists using [Gin](https://github.com/gin-gonic/gin) web framework.

* [drone](https://github.com/drone/drone): Drone is a Continuous Delivery platform built on Docker, written in Go
* [gorush](https://github.com/appleboy/gorush): A push notification server written in Go.

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