gin

package module
v1.2.1 Latest Latest
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 Go to latest Published: Oct 9, 2017 License: MIT Imports: 32 Imported by: 2

README

Gin Web Framework

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Gin is a web framework written in Go (Golang). It features a martini-like API with much better performance, up to 40 times faster thanks to httprouter. If you need performance and good productivity, you will love Gin.

Gin console logger

# assume the following codes in example.go file
$ cat example.go

package main

import "github.com/qd-um/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
}

# run example.go and visit 0.0.0.0:8080/ping on browser
$ go run example.go

Benchmarks

Gin uses a custom version of HttpRouter

See all benchmarks

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): Total Repetitions achieved in constant time, higher means more confident result (2): Single Repetition Duration (ns/op), lower is better (3): Heap Memory (B/op), lower is better (4): Average Allocations per Repetition (allocs/op), lower is better

Gin v1. stable

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

Start using it

  1. Download and install it:
$ go get github.com/qd-um/gin
  1. Import it in your code:
import "github.com/qd-um/gin"
  1. (Optional) Import net/http. This is required for example if using constants such as http.StatusOK.
import "net/http"
Use a vendor tool like Govendor
  1. go get govendor
$ go get github.com/kardianos/govendor
  1. Create your project folder and cd inside
$ mkdir -p ~/go/src/github.com/myusername/project && cd "$_"
  1. Vendor init your project and add gin
$ govendor init
$ govendor fetch github.com/qd-um/gin@v1.2
  1. Copy a starting template inside your project
$ curl https://raw.githubusercontent.com/gin-gonic/gin/master/examples/basic/main.go > main.go
  1. Run your project
$ go run main.go

Build with jsoniter

Gin use encoding/json as default json package but you can change to jsoniter by build from other tags.

$ go build -tags=jsoniter .

API Examples

Using GET, POST, PUT, PATCH, DELETE and OPTIONS
func main() {
	// Disable Console Color
	// gin.DisableConsoleColor()

	// Creates a gin router with default middleware:
	// logger and recovery (crash-free) middleware
	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.
	router.Run()
	// router.Run(":3000") for a hard coded port
}
Parameters in path
func main() {
	router := gin.Default()

	// This handler will match /user/john but will not match neither /user/ or /user
	router.GET("/user/:name", func(c *gin.Context) {
		name := c.Param("name")
		c.String(http.StatusOK, "Hello %s", name)
	})

	// However, this one will match /user/john/ and also /user/john/send
	// If no other routers match /user/john, it will redirect to /user/john/
	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)
	})

	router.Run(":8080")
}
Querystring parameters
func main() {
	router := gin.Default()

	// Query string parameters are parsed using the existing underlying request object.
	// The request responds to a url matching:  /welcome?firstname=Jane&lastname=Doe
	router.GET("/welcome", func(c *gin.Context) {
		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")
}
Multipart/Urlencoded Form
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")
}
Another example: query + post form
POST /post?id=1234&page=1 HTTP/1.1
Content-Type: application/x-www-form-urlencoded

name=manu&message=this_is_great

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

	router.POST("/post", func(c *gin.Context) {

		id := c.Query("id")
		page := c.DefaultQuery("page", "0")
		name := c.PostForm("name")
		message := c.PostForm("message")

		fmt.Printf("id: %s; page: %s; name: %s; message: %s", id, page, name, message)
	})
	router.Run(":8080")
}

id: 1234; page: 1; name: manu; message: this_is_great
Upload files
Single file

References issue #774 and detail example code.

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)

		// Upload the file to specific dst.
		// c.SaveUploadedFile(file, dst)

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

How to curl:

curl -X POST http://localhost:8080/upload \
  -F "file=@/Users/appleboy/test.zip" \
  -H "Content-Type: multipart/form-data"
Multiple files

See the detail example code.

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[]"]

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

How to curl:

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"
Grouping routes
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

Use

r := gin.New()

instead of

// Default With the Logger and Recovery middleware already attached
r := gin.Default()
Using middleware
func main() {
	// Creates a router without any middleware by default
	r := gin.New()

	// Global middleware
	// Logger middleware will write the logs to gin.DefaultWriter even 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())

	// Per route middleware, you can add as many as you desire.
	r.GET("/benchmark", MyBenchLogger(), benchEndpoint)

	// Authorization group
	// authorized := r.Group("/", AuthRequired())
	// exactly the same as:
	authorized := r.Group("/")
	// per group middleware! in this case we use the custom created
	// AuthRequired() middleware just in the "authorized" group.
	authorized.Use(AuthRequired())
	{
		authorized.POST("/login", loginEndpoint)
		authorized.POST("/submit", submitEndpoint)
		authorized.POST("/read", readEndpoint)

		// nested group
		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
func main() {
    // Disable Console Color, you don't need console color when writing the logs to file.
    gin.DisableConsoleColor()
    
    // Logging to a file.
    f, _ := os.Create("gin.log")
    gin.DefaultWriter = io.MultiWriter(f)
    
    // Use the following code if you need to write the logs to file and console at the same time.
    // gin.DefaultWriter = io.MultiWriter(f, os.Stdout)

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

    r.Run(":8080")
}
Model binding and validation

To bind a request body into a type, use model binding. We currently support binding of JSON, XML and standard form values (foo=bar&boo=baz).

Gin uses go-playground/validator.v8 for validation. Check the full docs on tags usage here.

Note that you need to set the corresponding binding tag on all fields you want to bind. For example, when binding from JSON, set json:"fieldname".

When using the Bind-method, Gin tries to infer the binder depending on the Content-Type header. If you are sure what you are binding, you can use BindWith.

You can also specify that specific fields are required. If a field is decorated with binding:"required" and has a empty value when binding, the current request will fail with an error.

// 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 c.BindJSON(&json) == 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"})
			}
		}
	})

	// 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 c.Bind(&form) == 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"})
			}
		}
	})

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

It is also possible to register custom validators. See the example code.

package main

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

	"github.com/qd-um/gin"
	"github.com/qd-um/gin/binding"
	validator "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()
	binding.Validator.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()})
	}
}

$ curl "localhost:8085/bookable?check_in=2017-08-16&check_out=2017-08-17"
{"message":"Booking dates are valid!"}

$ curl "localhost:8085/bookable?check_in=2017-08-15&check_out=2017-08-16"
{"error":"Key: 'Booking.CheckIn' Error:Field validation for 'CheckIn' failed on the 'bookabledate' tag"}
Only Bind Query String

BindQuery function only binds the query params and not the post data. See the detail information.

package main

import (
	"log"

	"github.com/qd-um/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.BindQuery(&person) == nil {
		log.Println("====== Only Bind By Query String ======")
		log.Println(person.Name)
		log.Println(person.Address)
	}
	c.String(200, "Success")
}
Bind Query String or Post Data

See the detail information.

package main

import "log"
import "github.com/qd-um/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/qd-um/gin/blob/master/binding/binding.go#L48
	if c.Bind(&person) == nil {
		log.Println(person.Name)
		log.Println(person.Address)
		log.Println(person.Birthday)
	}

	c.String(200, "Success")
}

Test it with:

$ curl -X GET "localhost:8085/testing?name=appleboy&address=xyz&birthday=1992-03-15"
Bind HTML checkboxes

See the detail information

main.go

...

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

...

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

...

form.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
package main

import (
	"github.com/qd-um/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.MustBindWith(&form, binding.Form)
		// or you can simply use autobinding with Bind method:
		var form LoginForm
		// in this case proper binding will be automatically selected
		if c.Bind(&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:

$ curl -v --form user=user --form password=password http://localhost:8080/login
XML, JSON and YAML rendering
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

Using SecureJSON to prevent json hijacking. Default prepends "while(1)," to response body if the given struct is array values.

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

	// You can also use your own secure json prefix
	// 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")
}
Serving static files
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")
}
HTML rendering

Using LoadHTMLGlob() or LoadHTMLFiles()

func main() {
	router := gin.Default()
	router.LoadHTMLGlob("templates/*")
	//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>
	<h1>
		{{ .title }}
	</h1>
</html>

Using templates with same name in different directories

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

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

templates/users/index.tmpl

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

You can also use your own html template render

import "html/template"

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

You may use custom delims

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

See the detail example code.

main.go

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

    "github.com/qd-um/gin"
)

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()
    router.Delims("{[{", "}]}")
    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

Date: {[{.now | formatAsDate}]}

Result:

Date: 2017/07/01
Multitemplate

Gin allow by default use only one html.Template. Check a multitemplate render for using features like go 1.6 block template.

Redirects

Issuing a HTTP redirect is easy:

r.GET("/test", func(c *gin.Context) {
	c.Redirect(http.StatusMovedPermanently, "http://www.google.com/")
})

Both internal and external locations are supported.

Custom Middleware
func Logger() gin.HandlerFunc {
	return func(c *gin.Context) {
		t := time.Now()

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

		// before request

		c.Next()

		// after request
		latency := time.Since(t)
		log.Print(latency)

		// access the status we are sending
		status := c.Writer.Status()
		log.Println(status)
	}
}

func main() {
	r := gin.New()
	r.Use(Logger())

	r.GET("/test", func(c *gin.Context) {
		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
// simulate some private data
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

When starting inside a middleware or handler, you SHOULD NOT use the original context inside it, you have to use a read-only copy.

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

	r.GET("/long_async", func(c *gin.Context) {
		// create copy to be used inside the goroutine
		cCp := c.Copy()
		go func() {
			// simulate a long task with time.Sleep(). 5 seconds
			time.Sleep(5 * time.Second)

			// note that you are using the copied context "cCp", IMPORTANT
			log.Println("Done! in path " + cCp.Request.URL.Path)
		}()
	})

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

		// since we are NOT using a goroutine, we do not have to copy the context
		log.Println("Done! in path " + c.Request.URL.Path)
	})

	// Listen and serve on 0.0.0.0:8080
	r.Run(":8080")
}
Custom HTTP configuration

Use http.ListenAndServe() directly, like this:

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

or

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

example for 1-line LetsEncrypt HTTPS servers.

package main

import (
	"log"

	"github.com/gin-gonic/autotls"
	"github.com/qd-um/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"))
}

example for custom autocert manager.

package main

import (
	"log"

	"github.com/gin-gonic/autotls"
	"github.com/qd-um/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

See the question and try the folling example:

package main

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

	"github.com/qd-um/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

Do you want to graceful restart or stop your web server? There are some ways this can be done.

We can use fvbock/endless to replace the default ListenAndServe. Refer issue #296 for more details.

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

An alternative to endless:

  • manners: A polite Go HTTP server that shuts down gracefully.
  • graceful: Graceful is a Go package enabling graceful shutdown of an http.Handler server.
  • 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() method for graceful shutdowns. See the full graceful-shutdown example with gin.

// +build go1.8

package main

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

	"github.com/qd-um/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 {
			log.Printf("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")
}

Users Sourcegraph

Awesome project lists using Gin web framework.

  • drone: Drone is a Continuous Delivery platform built on Docker, written in Go
  • gorush: A push notification server written in Go.

Documentation

Overview

Package gin implements a HTTP web framework called gin.

See https://gin-gonic.github.io/gin/ for more information about gin.

Index

Constants

View Source 
const (
	MIMEJSON              = binding.MIMEJSON
	MIMEHTML              = binding.MIMEHTML
	MIMEXML               = binding.MIMEXML
	MIMEXML2              = binding.MIMEXML2
	MIMEPlain             = binding.MIMEPlain
	MIMEPOSTForm          = binding.MIMEPOSTForm
	MIMEMultipartPOSTForm = binding.MIMEMultipartPOSTForm
)

Content-Type MIME of the most common data formats.

View Source 
const (
	DebugMode   string = "debug"
	ReleaseMode string = "release"
	TestMode    string = "test"
)
View Source 
const AuthUserKey = "user"

AuthUserKey is the cookie name for user credential in basic auth.

View Source 
const BindKey = "_gin-gonic/gin/bindkey"
View Source 
const ENV_GIN_MODE = "GIN_MODE"
View Source 
const (
	Version = "v1.2"
)

Version is Framework's version.

Variables

View Source 
var DefaultErrorWriter io.Writer = os.Stderr
View Source 
var DefaultWriter io.Writer = os.Stdout

DefaultWriter is the default io.Writer used the Gin for debug output and middleware output like Logger() or Recovery(). Note that both Logger and Recovery provides custom ways to configure their output io.Writer. To support coloring in Windows use: 

import "github.com/mattn/go-colorable"
gin.DefaultWriter = colorable.NewColorableStdout()

Functions

func CreateTestContext added in v1.2.1 

func CreateTestContext(w http.ResponseWriter) (c *Context, r *Engine)

CreateTestContext returns a fresh engine and context for testing purposes

func Dir 

func Dir(root string, listDirectory bool) http.FileSystem

Dir returns a http.Filesystem that can be used by http.FileServer(). It is used internally in router.Static(). if listDirectory == true, then it works the same as http.Dir() otherwise it returns a filesystem that prevents http.FileServer() to list the directory files.

func DisableBindValidation 

func DisableBindValidation()

func DisableConsoleColor added in v1.2.1 

func DisableConsoleColor()

DisableConsoleColor disables color output in the console.

func EnableJsonDecoderUseNumber added in v1.2.1 

func EnableJsonDecoderUseNumber()

func IsDebugging 

func IsDebugging() bool

IsDebugging returns true if the framework is running in debug mode. Use SetMode(gin.Release) to disable debug mode.

func Mode 

func Mode() string

func SetMode 

func SetMode(value string)

Types

type Accounts 

type Accounts map[string]string

Accounts defines a key/value for user/pass list of authorized logins.

type Context 

type Context struct {
	Request *http.Request
	Writer  ResponseWriter

	Params Params

	// Keys is a key/value pair exclusively for the context of each request.
	Keys map[string]interface{}

	// Errors is a list of errors attached to all the handlers/middlewares who used this context.
	Errors errorMsgs

	// Accepted defines a list of manually accepted formats for content negotiation.
	Accepted []string
	// contains filtered or unexported fields
}

Context is the most important part of gin. It allows us to pass variables between middleware, manage the flow, validate the JSON of a request and render a JSON response for example.

func (*Context) Abort 

func (c *Context) Abort()

Abort prevents pending handlers from being called. Note that this will not stop the current handler. Let's say you have an authorization middleware that validates that the current request is authorized. If the authorization fails (ex: the password does not match), call Abort to ensure the remaining handlers for this request are not called.

func (*Context) AbortWithError 

func (c *Context) AbortWithError(code int, err error) *Error

AbortWithError calls `AbortWithStatus()` and `Error()` internally. This method stops the chain, writes the status code and pushes the specified error to `c.Errors`. See Context.Error() for more details.

func (*Context) AbortWithStatus 

func (c *Context) AbortWithStatus(code int)

AbortWithStatus calls `Abort()` and writes the headers with the specified status code. For example, a failed attempt to authenticate a request could use: context.AbortWithStatus(401).

func (*Context) AbortWithStatusJSON added in v1.2.1 

func (c *Context) AbortWithStatusJSON(code int, jsonObj interface{})

AbortWithStatusJSON calls `Abort()` and then `JSON` internally. This method stops the chain, writes the status code and return a JSON body. It also sets the Content-Type as "application/json".

func (*Context) Bind 

func (c *Context) Bind(obj interface{}) error

Bind checks the Content-Type to select a binding engine automatically, Depending the "Content-Type" header different bindings are used: 

"application/json" --> JSON binding
"application/xml"  --> XML binding

otherwise --> returns an error It parses the request's body as JSON if Content-Type == "application/json" using JSON or XML as a JSON input. It decodes the json payload into the struct specified as a pointer. It will writes a 400 error and sets Content-Type header "text/plain" in the response if input is not valid.

func (*Context) BindJSON 

func (c *Context) BindJSON(obj interface{}) error

BindJSON is a shortcut for c.MustBindWith(obj, binding.JSON).

func (*Context) BindQuery added in v1.2.1 

func (c *Context) BindQuery(obj interface{}) error

BindQuery is a shortcut for c.MustBindWith(obj, binding.Query).

func (*Context) BindWith 

func (c *Context) BindWith(obj interface{}, b binding.Binding) error

BindWith binds the passed struct pointer using the specified binding engine. See the binding package.

func (*Context) ClientIP 

func (c *Context) ClientIP() string

ClientIP implements a best effort algorithm to return the real client IP, it parses X-Real-IP and X-Forwarded-For in order to work properly with reverse-proxies such us: nginx or haproxy. Use X-Forwarded-For before X-Real-Ip as nginx uses X-Real-Ip with the proxy's IP.

func (*Context) ContentType 

func (c *Context) ContentType() string

ContentType returns the Content-Type header of the request.

func (*Context) Cookie 

func (c *Context) Cookie(name string) (string, error)

Cookie returns the named cookie provided in the request or ErrNoCookie if not found. And return the named cookie is unescaped. If multiple cookies match the given name, only one cookie will be returned.

func (*Context) Copy 

func (c *Context) Copy() *Context

Copy returns a copy of the current context that can be safely used outside the request's scope. This has to be used when the context has to be passed to a goroutine.

func (*Context) Data 

func (c *Context) Data(code int, contentType string, data []byte)

Data writes some data into the body stream and updates the HTTP code.

func (*Context) Deadline 

func (c *Context) Deadline() (deadline time.Time, ok bool)

func (*Context) DefaultPostForm 

func (c *Context) DefaultPostForm(key, defaultValue string) string

DefaultPostForm returns the specified key from a POST urlencoded form or multipart form when it exists, otherwise it returns the specified defaultValue string. See: PostForm() and GetPostForm() for further information.

func (*Context) DefaultQuery 

func (c *Context) DefaultQuery(key, defaultValue string) string

DefaultQuery returns the keyed url query value if it exists, otherwise it returns the specified defaultValue string. See: Query() and GetQuery() for further information. 

GET /?name=Manu&lastname=
c.DefaultQuery("name", "unknown") == "Manu"
c.DefaultQuery("id", "none") == "none"
c.DefaultQuery("lastname", "none") == ""

func (*Context) Done 

func (c *Context) Done() <-chan struct{}

func (*Context) Err 

func (c *Context) Err() error

func (*Context) Error 

func (c *Context) Error(err error) *Error

Error attaches an error to the current context. The error is pushed to a list of errors. It's a good idea to call Error for each error that occurred during the resolution of a request. A middleware can be used to collect all the errors and push them to a database together, print a log, or append it in the HTTP response. Error will panic if err is nil.

func (*Context) File 

func (c *Context) File(filepath string)

File writes the specified file into the body stream in a efficient way.

func (*Context) FormFile added in v1.2.1 

func (c *Context) FormFile(name string) (*multipart.FileHeader, error)

FormFile returns the first file for the provided form key.

func (*Context) Get 

func (c *Context) Get(key string) (value interface{}, exists bool)

Get returns the value for the given key, ie: (value, true). If the value does not exists it returns (nil, false)

func (*Context) GetBool added in v1.2.1 

func (c *Context) GetBool(key string) (b bool)

GetBool returns the value associated with the key as a boolean.

func (*Context) GetDuration added in v1.2.1 

func (c *Context) GetDuration(key string) (d time.Duration)

GetDuration returns the value associated with the key as a duration.

func (*Context) GetFloat64 added in v1.2.1 

func (c *Context) GetFloat64(key string) (f64 float64)

GetFloat64 returns the value associated with the key as a float64.

func (*Context) GetHeader added in v1.2.1 

func (c *Context) GetHeader(key string) string

GetHeader returns value from request headers.

func (*Context) GetInt added in v1.2.1 

func (c *Context) GetInt(key string) (i int)

GetInt returns the value associated with the key as an integer.

func (*Context) GetInt64 added in v1.2.1 

func (c *Context) GetInt64(key string) (i64 int64)

GetInt64 returns the value associated with the key as an integer.

func (*Context) GetPostForm 

func (c *Context) GetPostForm(key string) (string, bool)

GetPostForm is like PostForm(key). It returns the specified key from a POST urlencoded form or multipart form when it exists `(value, true)` (even when the value is an empty string), otherwise it returns ("", false). For example, during a PATCH request to update the user's email: 

    email=mail@example.com  -->  ("mail@example.com", true) := GetPostForm("email") // set email to "mail@example.com"
	   email=                  -->  ("", true) := GetPostForm("email") // set email to ""
                            -->  ("", false) := GetPostForm("email") // do nothing with email

func (*Context) GetPostFormArray 

func (c *Context) GetPostFormArray(key string) ([]string, bool)

GetPostFormArray returns a slice of strings for a given form key, plus a boolean value whether at least one value exists for the given key.

func (*Context) GetQuery 

func (c *Context) GetQuery(key string) (string, bool)

GetQuery is like Query(), it returns the keyed url query value if it exists `(value, true)` (even when the value is an empty string), otherwise it returns `("", false)`. It is shortcut for `c.Request.URL.Query().Get(key)` 

GET /?name=Manu&lastname=
("Manu", true) == c.GetQuery("name")
("", false) == c.GetQuery("id")
("", true) == c.GetQuery("lastname")

func (*Context) GetQueryArray 

func (c *Context) GetQueryArray(key string) ([]string, bool)

GetQueryArray returns a slice of strings for a given query key, plus a boolean value whether at least one value exists for the given key.

func (*Context) GetRawData added in v1.2.1 

func (c *Context) GetRawData() ([]byte, error)

GetRawData return stream data.

func (*Context) GetString added in v1.2.1 

func (c *Context) GetString(key string) (s string)

GetString returns the value associated with the key as a string.

func (*Context) GetStringMap added in v1.2.1 

func (c *Context) GetStringMap(key string) (sm map[string]interface{})

GetStringMap returns the value associated with the key as a map of interfaces.

func (*Context) GetStringMapString added in v1.2.1 

func (c *Context) GetStringMapString(key string) (sms map[string]string)

GetStringMapString returns the value associated with the key as a map of strings.

func (*Context) GetStringMapStringSlice added in v1.2.1 

func (c *Context) GetStringMapStringSlice(key string) (smss map[string][]string)

GetStringMapStringSlice returns the value associated with the key as a map to a slice of strings.

func (*Context) GetStringSlice added in v1.2.1 

func (c *Context) GetStringSlice(key string) (ss []string)

GetStringSlice returns the value associated with the key as a slice of strings.

func (*Context) GetTime added in v1.2.1 

func (c *Context) GetTime(key string) (t time.Time)

GetTime returns the value associated with the key as time.

func (*Context) HTML 

func (c *Context) HTML(code int, name string, obj interface{})

HTML renders the HTTP template specified by its file name. It also updates the HTTP code and sets the Content-Type as "text/html". See http://golang.org/doc/articles/wiki/

func (*Context) Handler added in v1.2.1 

func (c *Context) Handler() HandlerFunc

Handler returns the main handler.

func (*Context) HandlerName 

func (c *Context) HandlerName() string

HandlerName returns the main handler's name. For example if the handler is "handleGetUsers()", this function will return "main.handleGetUsers".

func (*Context) Header 

func (c *Context) Header(key, value string)

Header is a intelligent shortcut for c.Writer.Header().Set(key, value). It writes a header in the response. If value == "", this method removes the header `c.Writer.Header().Del(key)`

func (*Context) IndentedJSON 

func (c *Context) IndentedJSON(code int, obj interface{})

IndentedJSON serializes the given struct as pretty JSON (indented + endlines) into the response body. It also sets the Content-Type as "application/json". WARNING: we recommend to use this only for development purposes since printing pretty JSON is more CPU and bandwidth consuming. Use Context.JSON() instead.

func (*Context) IsAborted 

func (c *Context) IsAborted() bool

IsAborted returns true if the current context was aborted.

func (*Context) IsWebsocket added in v1.2.1 

func (c *Context) IsWebsocket() bool

IsWebsocket returns true if the request headers indicate that a websocket handshake is being initiated by the client.

func (*Context) JSON 

func (c *Context) JSON(code int, obj interface{})

JSON serializes the given struct as JSON into the response body. It also sets the Content-Type as "application/json".

func (*Context) MultipartForm added in v1.2.1 

func (c *Context) MultipartForm() (*multipart.Form, error)

MultipartForm is the parsed multipart form, including file uploads.

func (*Context) MustBindWith added in v1.2.1 

func (c *Context) MustBindWith(obj interface{}, b binding.Binding) (err error)

MustBindWith binds the passed struct pointer using the specified binding engine. It will abort the request with HTTP 400 if any error ocurrs. See the binding package.

func (*Context) MustGet 

func (c *Context) MustGet(key string) interface{}

MustGet returns the value for the given key if it exists, otherwise it panics.

func (*Context) Negotiate 

func (c *Context) Negotiate(code int, config Negotiate)

func (*Context) NegotiateFormat 

func (c *Context) NegotiateFormat(offered ...string) string

func (*Context) Next 

func (c *Context) Next()

Next should be used only inside middleware. It executes the pending handlers in the chain inside the calling handler. See example in GitHub.

func (*Context) Param 

func (c *Context) Param(key string) string

Param returns the value of the URL param. It is a shortcut for c.Params.ByName(key) 

router.GET("/user/:id", func(c *gin.Context) {
    // a GET request to /user/john
    id := c.Param("id") // id == "john"
})

func (*Context) PostForm 

func (c *Context) PostForm(key string) string

PostForm returns the specified key from a POST urlencoded form or multipart form when it exists, otherwise it returns an empty string `("")`.

func (*Context) PostFormArray 

func (c *Context) PostFormArray(key string) []string

PostFormArray returns a slice of strings for a given form key. The length of the slice depends on the number of params with the given key.

func (*Context) Query 

func (c *Context) Query(key string) string

Query returns the keyed url query value if it exists, otherwise it returns an empty string `("")`. It is shortcut for `c.Request.URL.Query().Get(key)` 

    GET /path?id=1234&name=Manu&value=
	   c.Query("id") == "1234"
	   c.Query("name") == "Manu"
	   c.Query("value") == ""
	   c.Query("wtf") == ""

func (*Context) QueryArray 

func (c *Context) QueryArray(key string) []string

QueryArray returns a slice of strings for a given query key. The length of the slice depends on the number of params with the given key.

func (*Context) Redirect 

func (c *Context) Redirect(code int, location string)

Redirect returns a HTTP redirect to the specific location.

func (*Context) Render 

func (c *Context) Render(code int, r render.Render)

func (*Context) SSEvent 

func (c *Context) SSEvent(name string, message interface{})

SSEvent writes a Server-Sent Event into the body stream.

func (*Context) SaveUploadedFile added in v1.2.1 

func (c *Context) SaveUploadedFile(file *multipart.FileHeader, dst string) error

SaveUploadedFile uploads the form file to specific dst.

func (*Context) SecureJSON added in v1.2.1 

func (c *Context) SecureJSON(code int, obj interface{})

SecureJSON serializes the given struct as Secure JSON into the response body. Default prepends "while(1)," to response body if the given struct is array values. It also sets the Content-Type as "application/json".

func (*Context) Set 

func (c *Context) Set(key string, value interface{})

Set is used to store a new key/value pair exclusively for this context. It also lazy initializes c.Keys if it was not used previously.

func (*Context) SetAccepted 

func (c *Context) SetAccepted(formats ...string)

func (*Context) SetCookie 

func (c *Context) SetCookie(name, value string, maxAge int, path, domain string, secure, httpOnly bool)

SetCookie adds a Set-Cookie header to the ResponseWriter's headers. The provided cookie must have a valid Name. Invalid cookies may be silently dropped.

func (*Context) ShouldBindWith added in v1.2.1 

func (c *Context) ShouldBindWith(obj interface{}, b binding.Binding) error

ShouldBindWith binds the passed struct pointer using the specified binding engine. See the binding package.

func (*Context) Status 

func (c *Context) Status(code int)

Status sets the HTTP response code.

func (*Context) Stream 

func (c *Context) Stream(step func(w io.Writer) bool)

func (*Context) String 

func (c *Context) String(code int, format string, values ...interface{})

String writes the given string into the response body.

func (*Context) Value 

func (c *Context) Value(key interface{}) interface{}

func (*Context) XML 

func (c *Context) XML(code int, obj interface{})

XML serializes the given struct as XML into the response body. It also sets the Content-Type as "application/xml".

func (*Context) YAML 

func (c *Context) YAML(code int, obj interface{})

YAML serializes the given struct as YAML into the response body.

type Engine 

type Engine struct {
	RouterGroup

	HTMLRender render.HTMLRender
	FuncMap    template.FuncMap

	// Enables automatic redirection if the current route can't be matched but a
	// handler for the path with (without) the trailing slash exists.
	// For example if /foo/ is requested but a route only exists for /foo, the
	// client is redirected to /foo with http status code 301 for GET requests
	// and 307 for all other request methods.
	RedirectTrailingSlash bool

	// If enabled, the router tries to fix the current request path, if no
	// handle is registered for it.
	// First superfluous path elements like ../ or // are removed.
	// Afterwards the router does a case-insensitive lookup of the cleaned path.
	// If a handle can be found for this route, the router makes a redirection
	// to the corrected path with status code 301 for GET requests and 307 for
	// all other request methods.
	// For example /FOO and /..//Foo could be redirected to /foo.
	// RedirectTrailingSlash is independent of this option.
	RedirectFixedPath bool

	// If enabled, the router checks if another method is allowed for the
	// current route, if the current request can not be routed.
	// If this is the case, the request is answered with 'Method Not Allowed'
	// and HTTP status code 405.
	// If no other Method is allowed, the request is delegated to the NotFound
	// handler.
	HandleMethodNotAllowed bool
	ForwardedByClientIP    bool

	// #726 #755 If enabled, it will thrust some headers starting with
	// 'X-AppEngine...' for better integration with that PaaS.
	AppEngine bool

	// If enabled, the url.RawPath will be used to find parameters.
	UseRawPath bool

	// If true, the path value will be unescaped.
	// If UseRawPath is false (by default), the UnescapePathValues effectively is true,
	// as url.Path gonna be used, which is already unescaped.
	UnescapePathValues bool

	// Value of 'maxMemory' param that is given to http.Request's ParseMultipartForm
	// method call.
	MaxMultipartMemory int64
	// contains filtered or unexported fields
}

Engine is the framework's instance, it contains the muxer, middleware and configuration settings. Create an instance of Engine, by using New() or Default()

func Default 

func Default() *Engine

Default returns an Engine instance with the Logger and Recovery middleware already attached.

func New 

func New() *Engine

New returns a new blank Engine instance without any middleware attached. By default the configuration is: - RedirectTrailingSlash: true - RedirectFixedPath: false - HandleMethodNotAllowed: false - ForwardedByClientIP: true - UseRawPath: false - UnescapePathValues: true

func (*Engine) Delims added in v1.2.1 

func (engine *Engine) Delims(left, right string) *Engine

func (*Engine) HandleContext added in v1.2.1 

func (engine *Engine) HandleContext(c *Context)

HandleContext re-enter a context that has been rewritten. This can be done by setting c.Request.Path to your new target. Disclaimer: You can loop yourself to death with this, use wisely.

func (*Engine) LoadHTMLFiles 

func (engine *Engine) LoadHTMLFiles(files ...string)

func (*Engine) LoadHTMLGlob 

func (engine *Engine) LoadHTMLGlob(pattern string)

func (*Engine) NoMethod 

func (engine *Engine) NoMethod(handlers ...HandlerFunc)

NoMethod sets the handlers called when... TODO.

func (*Engine) NoRoute 

func (engine *Engine) NoRoute(handlers ...HandlerFunc)

NoRoute adds handlers for NoRoute. It return a 404 code by default.

func (*Engine) Routes 

func (engine *Engine) Routes() (routes RoutesInfo)

Routes returns a slice of registered routes, including some useful information, such as: the http method, path and the handler name.

func (*Engine) Run 

func (engine *Engine) Run(addr ...string) (err error)

Run attaches the router to a http.Server and starts listening and serving HTTP requests. It is a shortcut for http.ListenAndServe(addr, router) Note: this method will block the calling goroutine indefinitely unless an error happens.

func (*Engine) RunTLS 

func (engine *Engine) RunTLS(addr, certFile, keyFile string) (err error)

RunTLS attaches the router to a http.Server and starts listening and serving HTTPS (secure) requests. It is a shortcut for http.ListenAndServeTLS(addr, certFile, keyFile, router) Note: this method will block the calling goroutine indefinitely unless an error happens.

func (*Engine) RunUnix 

func (engine *Engine) RunUnix(file string) (err error)

RunUnix attaches the router to a http.Server and starts listening and serving HTTP requests through the specified unix socket (ie. a file). Note: this method will block the calling goroutine indefinitely unless an error happens.

func (*Engine) SecureJsonPrefix added in v1.2.1 

func (engine *Engine) SecureJsonPrefix(prefix string) *Engine

func (*Engine) ServeHTTP 

func (engine *Engine) ServeHTTP(w http.ResponseWriter, req *http.Request)

ServeHTTP conforms to the http.Handler interface.

func (*Engine) SetFuncMap added in v1.2.1 

func (engine *Engine) SetFuncMap(funcMap template.FuncMap)

func (*Engine) SetHTMLTemplate 

func (engine *Engine) SetHTMLTemplate(templ *template.Template)

func (*Engine) Use 

func (engine *Engine) Use(middleware ...HandlerFunc) IRoutes

Use attachs a global middleware to the router. ie. the middleware attached though Use() will be included in the handlers chain for every single request. Even 404, 405, static files... For example, this is the right place for a logger or error management middleware.

type Error 

type Error struct {
	Err  error
	Type ErrorType
	Meta interface{}
}

func (Error) Error 

func (msg Error) Error() string

Error implements the error interface

func (*Error) IsType 

func (msg *Error) IsType(flags ErrorType) bool

func (*Error) JSON 

func (msg *Error) JSON() interface{}

func (*Error) MarshalJSON 

func (msg *Error) MarshalJSON() ([]byte, error)

MarshalJSON implements the json.Marshaller interface.

func (*Error) SetMeta 

func (msg *Error) SetMeta(data interface{}) *Error

func (*Error) SetType 

func (msg *Error) SetType(flags ErrorType) *Error

type ErrorType 

type ErrorType uint64
const (
	ErrorTypeBind    ErrorType = 1 << 63 // used when c.Bind() fails
	ErrorTypeRender  ErrorType = 1 << 62 // used when c.Render() fails
	ErrorTypePrivate ErrorType = 1 << 0
	ErrorTypePublic  ErrorType = 1 << 1

	ErrorTypeAny ErrorType = 1<<64 - 1
	ErrorTypeNu            = 2
)

type H 

type H map[string]interface{}

func (H) MarshalXML 

func (h H) MarshalXML(e *xml.Encoder, start xml.StartElement) error

MarshalXML allows type H to be used with xml.Marshal.

type HandlerFunc 

type HandlerFunc func(*Context)

func BasicAuth 

func BasicAuth(accounts Accounts) HandlerFunc

BasicAuth returns a Basic HTTP Authorization middleware. It takes as argument a map[string]string where the key is the user name and the value is the password.

func BasicAuthForRealm 

func BasicAuthForRealm(accounts Accounts, realm string) HandlerFunc

BasicAuthForRealm returns a Basic HTTP Authorization middleware. It takes as arguments a map[string]string where the key is the user name and the value is the password, as well as the name of the Realm. If the realm is empty, "Authorization Required" will be used by default. (see http://tools.ietf.org/html/rfc2617#section-1.2)

func Bind 

func Bind(val interface{}) HandlerFunc

func ErrorLogger 

func ErrorLogger() HandlerFunc

ErrorLogger returns a handlerfunc for any error type.

func ErrorLoggerT 

func ErrorLoggerT(typ ErrorType) HandlerFunc

ErrorLoggerT returns a handlerfunc for a given error type.

func Logger 

func Logger() HandlerFunc

Logger instances a Logger middleware that will write the logs to gin.DefaultWriter. By default gin.DefaultWriter = os.Stdout.

func LoggerWithWriter 

func LoggerWithWriter(out io.Writer, notlogged ...string) HandlerFunc

LoggerWithWriter instance a Logger middleware with the specified writter buffer. Example: os.Stdout, a file opened in write mode, a socket...

func Recovery 

func Recovery() HandlerFunc

Recovery returns a middleware that recovers from any panics and writes a 500 if there was one.

func RecoveryWithWriter 

func RecoveryWithWriter(out io.Writer) HandlerFunc

RecoveryWithWriter returns a middleware for a given writer that recovers from any panics and writes a 500 if there was one.

func WrapF 

func WrapF(f http.HandlerFunc) HandlerFunc

func WrapH 

func WrapH(h http.Handler) HandlerFunc

type HandlersChain 

type HandlersChain []HandlerFunc

func (HandlersChain) Last 

func (c HandlersChain) Last() HandlerFunc

Last returns the last handler in the chain. ie. the last handler is the main own.

type IRouter 

type IRouter interface {
	IRoutes
	Group(string, ...HandlerFunc) *RouterGroup
}

type IRoutes 

type IRoutes interface {
	Use(...HandlerFunc) IRoutes

	Handle(string, string, ...HandlerFunc) IRoutes
	Any(string, ...HandlerFunc) IRoutes
	GET(string, ...HandlerFunc) IRoutes
	POST(string, ...HandlerFunc) IRoutes
	DELETE(string, ...HandlerFunc) IRoutes
	PATCH(string, ...HandlerFunc) IRoutes
	PUT(string, ...HandlerFunc) IRoutes
	OPTIONS(string, ...HandlerFunc) IRoutes
	HEAD(string, ...HandlerFunc) IRoutes

	StaticFile(string, string) IRoutes
	Static(string, string) IRoutes
	StaticFS(string, http.FileSystem) IRoutes
}

type Negotiate 

type Negotiate struct {
	Offered  []string
	HTMLName string
	HTMLData interface{}
	JSONData interface{}
	XMLData  interface{}
	Data     interface{}
}

type Param 

type Param struct {
	Key   string
	Value string
}

Param is a single URL parameter, consisting of a key and a value.

type Params 

type Params []Param

Params is a Param-slice, as returned by the router. The slice is ordered, the first URL parameter is also the first slice value. It is therefore safe to read values by the index.

func (Params) ByName 

func (ps Params) ByName(name string) (va string)

ByName returns the value of the first Param which key matches the given name. If no matching Param is found, an empty string is returned.

func (Params) Get 

func (ps Params) Get(name string) (string, bool)

Get returns the value of the first Param which key matches the given name. If no matching Param is found, an empty string is returned.

type ResponseWriter 

type ResponseWriter interface {
	http.ResponseWriter
	http.Hijacker
	http.Flusher
	http.CloseNotifier

	// Returns the HTTP response status code of the current request.
	Status() int

	// Returns the number of bytes already written into the response http body.
	// See Written()
	Size() int

	// Writes the string into the response body.
	WriteString(string) (int, error)

	// Returns true if the response body was already written.
	Written() bool

	// Forces to write the http header (status code + headers).
	WriteHeaderNow()
}

type RouteInfo 

type RouteInfo struct {
	Method  string
	Path    string
	Handler string
}

type RouterGroup 

type RouterGroup struct {
	Handlers HandlersChain
	// contains filtered or unexported fields
}

RouterGroup is used internally to configure router, a RouterGroup is associated with a prefix and an array of handlers (middleware).

func (*RouterGroup) Any 

func (group *RouterGroup) Any(relativePath string, handlers ...HandlerFunc) IRoutes

Any registers a route that matches all the HTTP methods. GET, POST, PUT, PATCH, HEAD, OPTIONS, DELETE, CONNECT, TRACE.

func (*RouterGroup) BasePath 

func (group *RouterGroup) BasePath() string

func (*RouterGroup) DELETE 

func (group *RouterGroup) DELETE(relativePath string, handlers ...HandlerFunc) IRoutes

DELETE is a shortcut for router.Handle("DELETE", path, handle).

func (*RouterGroup) GET 

func (group *RouterGroup) GET(relativePath string, handlers ...HandlerFunc) IRoutes

GET is a shortcut for router.Handle("GET", path, handle).

func (*RouterGroup) Group 

func (group *RouterGroup) Group(relativePath string, handlers ...HandlerFunc) *RouterGroup

Group creates a new router group. You should add all the routes that have common middlwares or the same path prefix. For example, all the routes that use a common middlware for authorization could be grouped.

func (*RouterGroup) HEAD 

func (group *RouterGroup) HEAD(relativePath string, handlers ...HandlerFunc) IRoutes

HEAD is a shortcut for router.Handle("HEAD", path, handle).

func (*RouterGroup) Handle 

func (group *RouterGroup) Handle(httpMethod, relativePath string, handlers ...HandlerFunc) IRoutes

Handle registers a new request handle and middleware with the given path and method. The last handler should be the real handler, the other ones should be middleware that can and should be shared among different routes. See the example code in github.

For GET, POST, PUT, PATCH and DELETE requests the respective shortcut functions can be used.

This function is intended for bulk loading and to allow the usage of less frequently used, non-standardized or custom methods (e.g. for internal communication with a proxy).

func (*RouterGroup) OPTIONS 

func (group *RouterGroup) OPTIONS(relativePath string, handlers ...HandlerFunc) IRoutes

OPTIONS is a shortcut for router.Handle("OPTIONS", path, handle).

func (*RouterGroup) PATCH 

func (group *RouterGroup) PATCH(relativePath string, handlers ...HandlerFunc) IRoutes

PATCH is a shortcut for router.Handle("PATCH", path, handle).

func (*RouterGroup) POST 

func (group *RouterGroup) POST(relativePath string, handlers ...HandlerFunc) IRoutes

POST is a shortcut for router.Handle("POST", path, handle).

func (*RouterGroup) PUT 

func (group *RouterGroup) PUT(relativePath string, handlers ...HandlerFunc) IRoutes

PUT is a shortcut for router.Handle("PUT", path, handle).

func (*RouterGroup) Static 

func (group *RouterGroup) Static(relativePath, root string) IRoutes

Static serves files from the given file system root. Internally a http.FileServer is used, therefore http.NotFound is used instead of the Router's NotFound handler. To use the operating system's file system implementation, use : 

router.Static("/static", "/var/www")

func (*RouterGroup) StaticFS 

func (group *RouterGroup) StaticFS(relativePath string, fs http.FileSystem) IRoutes

StaticFS works just like `Static()` but a custom `http.FileSystem` can be used instead. Gin by default user: gin.Dir()

func (*RouterGroup) StaticFile 

func (group *RouterGroup) StaticFile(relativePath, filepath string) IRoutes

StaticFile registers a single route in order to server a single file of the local filesystem. router.StaticFile("favicon.ico", "./resources/favicon.ico")

func (*RouterGroup) Use 

func (group *RouterGroup) Use(middleware ...HandlerFunc) IRoutes

Use adds middleware to the group, see example code in github.

type RoutesInfo 

type RoutesInfo []RouteInfo

Source Files

View all Source files

Directories

Path Synopsis
example
Package example is a generated protocol buffer package.
 Package example is a generated protocol buffer package.
examples
app-engine
auto-tls
basic
custom-validation
favicon
graceful-shutdown/close
graceful-shutdown/graceful-shutdown
http2
multiple-service
realtime-advanced
realtime-chat
template
upload-file/multiple
upload-file/single

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