Gin Web Framework 中文版

＃在example.go文件中假定以下代碼

$ cat example.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

}

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

$ go run example.go

go get github.com/gin-gonic/gin

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

import "net/http"

$ go get github.com/kardianos/govendor

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

$ govendor init

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

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

$ go run main.go

$ go build -tags=jsoniter .

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

}

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")

}

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")

}

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")

}

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

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")

}

curl -X POST http://localhost:8080/upload \

  -F "file=@/Users/appleboy/test.zip" \

  -H "Content-Type: multipart/form-data"

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")

}

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"

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")

}

r := gin.New()

// Default With the Logger and Recovery middleware already attached

r := gin.Default()

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 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())

// 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")

}

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")

    })

    router.Run(":8080")

}

// 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")

}

$ 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"}

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()

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"}

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.String(200, "Success")

}

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")

}

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

...

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 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>

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

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")

}

$ curl -v --form user=user --form password=password http://localhost:8080/login

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")

}

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")

}

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")

}

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")

}

<html>

<h2>

{{ .title }}

</h2>

</html>

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")

}

{{ define "posts/index.tmpl" }}

<html><h2>

{{ .title }}

</h2>

<p>Using posts/index.tmpl</p>

</html>

{{ end }}

templates/users/index.tmpl

{{ define "users/index.tmpl" }}

<html><h2>

{{ .title }}

</h2>

<p>Using users/index.tmpl</p>

</html>

{{ end }}

import "html/template"

func main() {

router := gin.Default()

html := template.Must(template.ParseFiles("file1", "file2"))

router.SetHTMLTemplate(html)

router.Run(":8080")

}

r := gin.Default()

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

r.LoadHTMLGlob("/path/to/templates"))

import (

    "fmt"

    "html/template"

    "net/http"

    "time"

    "github.com/gin-gonic/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")

}

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

Date: 2017/07/01

r.GET("/test", func(c *gin.Context) {

c.Redirect(http.StatusMovedPermanently, "http://www.google.com/")

})

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")

}

//模擬一些私人數(shù)據(jù)

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")

}

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")

}

func main() {

router := gin.Default()

http.ListenAndServe(":8080", router)

}

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()

}

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"))

}

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))

}

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) {