diff --git a/README.md b/README.md
index d3433ed2..804041f9 100644
--- a/README.md
+++ b/README.md
@@ -13,35 +13,122 @@
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](https://github.com/julienschmidt/httprouter). If you need performance and good productivity, you will love Gin.
-**The key features of Gin are:**
-- Zero allocation router
-- Fast
-- Middleware support
-- Crash-free
-- JSON validation
-- Routes grouping
-- Error management
-- Rendering built-in
-- Extendable
+## Contents
-For more feature details, please see the [Gin website introduction](https://gin-gonic.com/docs/introduction/).
+- [Installation](#installation)
+- [Prerequisite](#prerequisite)
+- [Quick start](#quick-start)
+- [Benchmarks](#benchmarks)
+- [Gin v1.stable](#gin-v1-stable)
+- [Build with jsoniter](#build-with-jsoniter)
+- [API Examples](#api-examples)
+ - [Using GET,POST,PUT,PATCH,DELETE and OPTIONS](#using-get-post-put-patch-delete-and-options)
+ - [Parameters in path](#parameters-in-path)
+ - [Querystring parameters](#querystring-parameters)
+ - [Multipart/Urlencoded Form](#multiparturlencoded-form)
+ - [Another example: query + post form](#another-example-query--post-form)
+ - [Map as querystring or postform parameters](#map-as-querystring-or-postform-parameters)
+ - [Upload files](#upload-files)
+ - [Grouping routes](#grouping-routes)
+ - [Blank Gin without middleware by default](#blank-gin-without-middleware-by-default)
+ - [Using middleware](#using-middleware)
+ - [How to write log file](#how-to-write-log-file)
+ - [Custom Log Format](#custom-log-format)
+ - [Model binding and validation](#model-binding-and-validation)
+ - [Custom Validators](#custom-validators)
+ - [Only Bind Query String](#only-bind-query-string)
+ - [Bind Query String or Post Data](#bind-query-string-or-post-data)
+ - [Bind Uri](#bind-uri)
+ - [Bind HTML checkboxes](#bind-html-checkboxes)
+ - [Multipart/Urlencoded binding](#multiparturlencoded-binding)
+ - [XML, JSON, YAML and ProtoBuf rendering](#xml-json-yaml-and-protobuf-rendering)
+ - [JSONP rendering](#jsonp)
+ - [Serving static files](#serving-static-files)
+ - [Serving data from reader](#serving-data-from-reader)
+ - [HTML rendering](#html-rendering)
+ - [Multitemplate](#multitemplate)
+ - [Redirects](#redirects)
+ - [Custom Middleware](#custom-middleware)
+ - [Using BasicAuth() middleware](#using-basicauth-middleware)
+ - [Goroutines inside a middleware](#goroutines-inside-a-middleware)
+ - [Custom HTTP configuration](#custom-http-configuration)
+ - [Support Let's Encrypt](#support-lets-encrypt)
+ - [Run multiple service using Gin](#run-multiple-service-using-gin)
+ - [Graceful restart or stop](#graceful-restart-or-stop)
+ - [Build a single binary with templates](#build-a-single-binary-with-templates)
+ - [Bind form-data request with custom struct](#bind-form-data-request-with-custom-struct)
+ - [Try to bind body into different structs](#try-to-bind-body-into-different-structs)
+ - [http2 server push](#http2-server-push)
+ - [Define format for the log of routes](#define-format-for-the-log-of-routes)
+ - [Set and get a cookie](#set-and-get-a-cookie)
+- [Testing](#testing)
+- [Users](#users)
-## Getting started
+## Installation
-### Getting Gin
+To install Gin package, you need to install Go and set your Go workspace first.
-The first need [Go](https://golang.org/) installed (**version 1.6+ is required**), then you can use the below Go command to install Gin.
+1. Download and install it:
```sh
$ go get -u github.com/gin-gonic/gin
```
-For more installation guides such as vendor tool, please check out [Gin quickstart](https://gin-gonic.com/docs/quickstart/).
+2. Import it in your code:
-### Running Gin
+```go
+import "github.com/gin-gonic/gin"
+```
-First you need to import Gin package for using Gin, one simplest example likes the follow `example.go`:
+3. (Optional) Import `net/http`. This is required for example if using constants such as `http.StatusOK`.
+
+```go
+import "net/http"
+```
+
+### Use a vendor tool like [Govendor](https://github.com/kardianos/govendor)
+
+1. `go get` govendor
+
+```sh
+$ go get github.com/kardianos/govendor
+```
+2. Create your project folder and `cd` inside
+
+```sh
+$ mkdir -p $GOPATH/src/github.com/myusername/project && cd "$_"
+```
+
+3. Vendor init your project and add gin
+
+```sh
+$ govendor init
+$ govendor fetch github.com/gin-gonic/gin@v1.3
+```
+
+4. Copy a starting template inside your project
+
+```sh
+$ curl https://raw.githubusercontent.com/gin-gonic/examples/master/basic/main.go > main.go
+```
+
+5. Run your project
+
+```sh
+$ go run main.go
+```
+
+## Prerequisite
+
+Now Gin requires Go 1.6 or later and Go 1.7 will be required soon.
+
+## Quick start
+
+```sh
+# assume the following codes in example.go file
+$ cat example.go
+```
```go
package main
@@ -59,8 +146,6 @@ func main() {
}
```
-And use the Go command to run the demo:
-
```
# run example.go and visit 0.0.0.0:8080/ping on browser
$ go run example.go
@@ -68,7 +153,9 @@ $ go run example.go
## Benchmarks
-Please see all benchmarks details from [Gin website](https://gin-gonic.com/docs/benchmarks/).
+Gin uses a custom version of [HttpRouter](https://github.com/julienschmidt/httprouter)
+
+[See all benchmarks](/BENCHMARKS.md)
Benchmark name | (1) | (2) | (3) | (4)
--------------------------------------------|-----------:|------------:|-----------:|---------:
@@ -105,32 +192,1879 @@ BenchmarkVulcan_GithubAll | 5000 | 394253 | 19894
- (3): Heap Memory (B/op), lower is better
- (4): Average Allocations per Repetition (allocs/op), lower is better
-## Middlewares
+## Gin v1. stable
-You can find many useful Gin middlewares at [gin-contrib](https://github.com/gin-contrib).
+- [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.
-## Documentation
+## Build with [jsoniter](https://github.com/json-iterator/go)
-See [API documentation and descriptions](https://godoc.org/github.com/gin-gonic/gin) for package.
+Gin uses `encoding/json` as default json package but you can change to [jsoniter](https://github.com/json-iterator/go) by build from other tags.
-All documentation is available on the Gin website.
+```sh
+$ go build -tags=jsoniter .
+```
-- [English](https://gin-gonic.com/docs/)
-- [简体中文](https://gin-gonic.com/zh-cn/docs/)
-- [繁體中文](https://gin-gonic.com/zh-tw/docs/)
-- [日本語](https://gin-gonic.com/ja/docs/)
+## API Examples
-## Examples
+You can find a number of ready-to-run examples at [Gin examples repository](https://github.com/gin-gonic/examples).
-A number of ready-to-run examples demonstrating various use cases of Gin on the [Gin examples](https://github.com/gin-gonic/examples) repository.
+### Using GET, POST, PUT, PATCH, DELETE and OPTIONS
+
+```go
+func main() {
+ // 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
+
+```go
+func main() {
+ router := gin.Default()
+
+ // This handler will match /user/john but will not match /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
+
+```go
+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
+
+```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")
+}
+```
+
+### 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
+```
+
+```go
+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
+```
+
+### Map as querystring or postform parameters
+
+```
+POST /post?ids[a]=1234&ids[b]=hello HTTP/1.1
+Content-Type: application/x-www-form-urlencoded
+
+names[first]=thinkerou&names[second]=tianou
+```
+
+```go
+func main() {
+ router := gin.Default()
+
+ router.POST("/post", func(c *gin.Context) {
+
+ ids := c.QueryMap("ids")
+ names := c.PostFormMap("names")
+
+ fmt.Printf("ids: %v; names: %v", ids, names)
+ })
+ router.Run(":8080")
+}
+```
+
+```
+ids: map[b:hello a:1234], names: map[second:tianou first:thinkerou]
+```
+
+### Upload files
+
+#### Single file
+
+References issue [#774](https://github.com/gin-gonic/gin/issues/774) and detail [example code](https://github.com/gin-gonic/examples/tree/master/upload-file/single).
+
+`file.Filename` **SHOULD NOT** be trusted. See [`Content-Disposition` on MDN](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Disposition#Directives) and [#1693](https://github.com/gin-gonic/gin/issues/1693)
+
+> The filename is always optional and must not be used blindly by the application: path information should be stripped, and conversion to the server file system rules should be done.
+
+```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)
+
+ // 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`:
+
+```bash
+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](https://github.com/gin-gonic/examples/tree/master/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[]"]
+
+ 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`:
+
+```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"
+```
+
+### Grouping routes
+
+```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
+
+Use
+
+```go
+r := gin.New()
+```
+
+instead of
+
+```go
+// Default With the Logger and Recovery middleware already attached
+r := gin.Default()
+```
+
+
+### Using middleware
+```go
+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")
+}
+```
+
+### How to write log file
+```go
+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")
+}
+```
+
+### Custom Log Format
+```go
+func main() {
+ router := gin.New()
+
+ // LoggerWithFormatter middleware will write the logs to gin.DefaultWriter
+ // By default gin.DefaultWriter = os.Stdout
+ router.Use(gin.LoggerWithFormatter(func(param gin.LogFormatterParams) string {
+
+ // your custom format
+ return fmt.Sprintf("%s - [%s] \"%s %s %s %d %s \"%s\" %s\"\n",
+ param.ClientIP,
+ param.TimeStamp.Format(time.RFC1123),
+ param.Method,
+ param.Path,
+ param.Request.Proto,
+ param.StatusCode,
+ param.Latency,
+ param.Request.UserAgent(),
+ param.ErrorMessage,
+ )
+ }))
+ router.Use(gin.Recovery())
+
+ router.GET("/ping", func(c *gin.Context) {
+ c.String(200, "pong")
+ })
+
+ router.Run(":8080")
+}
+```
+
+**Sample Output**
+```
+::1 - [Fri, 07 Dec 2018 17:04:38 JST] "GET /ping HTTP/1.1 200 122.767µs "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.80 Safari/537.36" "
+```
+
+### Controlling Log output coloring
+
+By default, logs output on console should be colorized depending on the detected TTY.
+
+Never colorize logs:
+
+```go
+func main() {
+ // Disable log's color
+ gin.DisableConsoleColor()
+
+ // Creates a gin router with default middleware:
+ // logger and recovery (crash-free) middleware
+ router := gin.Default()
+
+ router.GET("/ping", func(c *gin.Context) {
+ c.String(200, "pong")
+ })
+
+ router.Run(":8080")
+}
+```
+
+Always colorize logs:
+
+```go
+func main() {
+ // Force log's color
+ gin.ForceConsoleColor()
+
+ // Creates a gin router with default middleware:
+ // logger and recovery (crash-free) middleware
+ router := gin.Default()
+
+ router.GET("/ping", func(c *gin.Context) {
+ c.String(200, "pong")
+ })
+
+ router.Run(":8080")
+}
+```
+
+### Model binding and validation
+
+To bind a request body into a type, use model binding. We currently support binding of JSON, XML, YAML and standard form values (foo=bar&boo=baz).
+
+Gin uses [**go-playground/validator.v8**](https://github.com/go-playground/validator) for validation. Check the full docs on tags usage [here](http://godoc.org/gopkg.in/go-playground/validator.v8#hdr-Baked_In_Validators_and_Tags).
+
+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"`.
+
+Also, Gin provides two sets of methods for binding:
+- **Type** - Must bind
+ - **Methods** - `Bind`, `BindJSON`, `BindXML`, `BindQuery`, `BindYAML`
+ - **Behavior** - These methods use `MustBindWith` under the hood. If there is a binding error, the request is aborted with `c.AbortWithError(400, err).SetType(ErrorTypeBind)`. This sets the response status code to 400 and the `Content-Type` header is set to `text/plain; charset=utf-8`. Note that if you try to set the response code after this, it will result in a warning `[GIN-debug] [WARNING] Headers were already written. Wanted to override status code 400 with 422`. If you wish to have greater control over the behavior, consider using the `ShouldBind` equivalent method.
+- **Type** - Should bind
+ - **Methods** - `ShouldBind`, `ShouldBindJSON`, `ShouldBindXML`, `ShouldBindQuery`, `ShouldBindYAML`
+ - **Behavior** - These methods use `ShouldBindWith` under the hood. If there is a binding error, the error is returned and it is the developer's responsibility to handle the request and error appropriately.
+
+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 `MustBindWith` or `ShouldBindWith`.
+
+You can also specify that specific fields are required. If a field is decorated with `binding:"required"` and has a empty value when binding, an error will be returned.
+
+```go
+// Binding from JSON
+type Login struct {
+ User string `form:"user" json:"user" xml:"user" binding:"required"`
+ Password string `form:"password" json:"password" xml:"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 {
+ c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+ return
+ }
+
+ if json.User != "manu" || json.Password != "123" {
+ c.JSON(http.StatusUnauthorized, gin.H{"status": "unauthorized"})
+ return
+ }
+
+ c.JSON(http.StatusOK, gin.H{"status": "you are logged in"})
+ })
+
+ // Example for binding XML (
+ //
+ //
+ // user
+ // 123
+ // )
+ router.POST("/loginXML", func(c *gin.Context) {
+ var xml Login
+ if err := c.ShouldBindXML(&xml); err != nil {
+ c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+ return
+ }
+
+ if xml.User != "manu" || xml.Password != "123" {
+ c.JSON(http.StatusUnauthorized, gin.H{"status": "unauthorized"})
+ return
+ }
+
+ c.JSON(http.StatusOK, gin.H{"status": "you are logged in"})
+ })
+
+ // 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 {
+ c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+ return
+ }
+
+ if form.User != "manu" || form.Password != "123" {
+ c.JSON(http.StatusUnauthorized, gin.H{"status": "unauthorized"})
+ return
+ }
+
+ c.JSON(http.StatusOK, gin.H{"status": "you are logged in"})
+ })
+
+ // 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"}
+```
+
+**Skip validate**
+
+When running the above example using the above the `curl` command, it returns error. Because the example use `binding:"required"` for `Password`. If use `binding:"-"` for `Password`, then it will not return error when running the above example again.
+
+### Custom Validators
+
+It is also possible to register custom validators. See the [example code](https://github.com/gin-gonic/examples/tree/master/custom-validation/server.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"
+)
+
+// Booking contains binded and validated data.
+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"}
+```
+
+[Struct level validations](https://github.com/go-playground/validator/releases/tag/v8.7) can also be registered this way.
+See the [struct-lvl-validation example](https://github.com/gin-gonic/examples/tree/master/struct-lvl-validations) to learn more.
+
+### Only Bind Query String
+
+`ShouldBindQuery` function only binds the query params and not the post data. See the [detail information](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.String(200, "Success")
+}
+
+```
+
+### Bind Query String or Post Data
+
+See the [detail information](https://github.com/gin-gonic/gin/issues/742#issuecomment-264681292).
+
+```go
+package main
+
+import (
+ "log"
+ "time"
+
+ "github.com/gin-gonic/gin"
+)
+
+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 Uri
+
+See the [detail information](https://github.com/gin-gonic/gin/issues/846).
+
+```go
+package main
+
+import "github.com/gin-gonic/gin"
+
+type Person struct {
+ ID string `uri:"id" binding:"required,uuid"`
+ Name string `uri:"name" binding:"required"`
+}
+
+func main() {
+ route := gin.Default()
+ route.GET("/:name/:id", func(c *gin.Context) {
+ var person Person
+ if err := c.ShouldBindUri(&person); err != nil {
+ c.JSON(400, gin.H{"msg": err})
+ return
+ }
+ c.JSON(200, gin.H{"name": person.Name, "uuid": person.ID})
+ })
+ route.Run(":8088")
+}
+```
+
+Test it with:
+```sh
+$ curl -v localhost:8088/thinkerou/987fbc97-4bed-5078-9f07-9141ba07c9f3
+$ curl -v localhost:8088/thinkerou/not-uuid
+```
+
+### Bind 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
+
+```
+
+result:
+
+```
+{"color":["red","green","blue"]}
+```
+
+### Multipart/Urlencoded binding
+
+```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, YAML and ProtoBuf rendering
+
+```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})
+ })
+
+ r.GET("/someProtoBuf", func(c *gin.Context) {
+ reps := []int64{int64(1), int64(2)}
+ label := "test"
+ // The specific definition of protobuf is written in the testdata/protoexample file.
+ data := &protoexample.Test{
+ Label: &label,
+ Reps: reps,
+ }
+ // Note that data becomes binary data in the response
+ // Will output protoexample.Test protobuf serialized data
+ c.ProtoBuf(http.StatusOK, data)
+ })
+
+ // 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.
+
+```go
+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")
+}
+```
+#### JSONP
+
+Using JSONP to request data from a server in a different domain. Add callback to response body if the query parameter callback exists.
+
+```go
+func main() {
+ r := gin.Default()
+
+ r.GET("/JSONP?callback=x", 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")
+}
+```
+
+#### AsciiJSON
+
+Using AsciiJSON to Generates ASCII-only JSON with escaped non-ASCII chracters.
+
+```go
+func main() {
+ r := gin.Default()
+
+ r.GET("/someJSON", func(c *gin.Context) {
+ data := map[string]interface{}{
+ "lang": "GO语言",
+ "tag": "
",
+ }
+
+ // will output : {"lang":"GO\u8bed\u8a00","tag":"\u003cbr\u003e"}
+ c.AsciiJSON(http.StatusOK, data)
+ })
+
+ // Listen and serve on 0.0.0.0:8080
+ r.Run(":8080")
+}
+```
+
+#### PureJSON
+
+Normally, JSON replaces special HTML characters with their unicode entities, e.g. `<` becomes `\u003c`. If you want to encode such characters literally, you can use PureJSON instead.
+This feature is unavailable in Go 1.6 and lower.
+
+```go
+func main() {
+ r := gin.Default()
+
+ // Serves unicode entities
+ r.GET("/json", func(c *gin.Context) {
+ c.JSON(200, gin.H{
+ "html": "Hello, world!",
+ })
+ })
+
+ // Serves literal characters
+ r.GET("/purejson", func(c *gin.Context) {
+ c.PureJSON(200, gin.H{
+ "html": "Hello, world!",
+ })
+ })
+
+ // listen and serve on 0.0.0.0:8080
+ r.Run(":8080")
+}
+```
+
+### Serving static files
+
+```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
+
+Using LoadHTMLGlob() or LoadHTMLFiles()
+
+```go
+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
+
+
+ {{ .title }}
+
+
+```
+
+Using templates with same name in different directories
+
+```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" }}
+
+ {{ .title }}
+
+Using posts/index.tmpl
+
+{{ end }}
+```
+
+templates/users/index.tmpl
+
+```html
+{{ define "users/index.tmpl" }}
+
+ {{ .title }}
+
+Using users/index.tmpl
+
+{{ end }}
+```
+
+#### Custom Template renderer
+
+You can also use your own html template render
+
+```go
+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
+
+```go
+ r := gin.Default()
+ r.Delims("{[{", "}]}")
+ r.LoadHTMLGlob("/path/to/templates")
+```
+
+#### Custom Template Funcs
+
+See the detail [example code](https://github.com/gin-gonic/examples/tree/master/template).
+
+main.go
+
+```go
+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("./testdata/template/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
+Date: {[{.now | formatAsDate}]}
+```
+
+Result:
+```
+Date: 2017/07/01
+```
+
+### Multitemplate
+
+Gin allow by default use only one html.Template. Check [a multitemplate render](https://github.com/gin-contrib/multitemplate) for using features like go 1.6 `block template`.
+
+### Redirects
+
+Issuing a HTTP redirect is easy. Both internal and external locations are supported.
+
+```go
+r.GET("/test", func(c *gin.Context) {
+ c.Redirect(http.StatusMovedPermanently, "http://www.google.com/")
+})
+```
+
+
+Issuing a Router redirect, use `HandleContext` like below.
+
+``` go
+r.GET("/test", func(c *gin.Context) {
+ c.Request.URL.Path = "/test2"
+ r.HandleContext(c)
+})
+r.GET("/test2", func(c *gin.Context) {
+ c.JSON(200, gin.H{"hello": "world"})
+})
+```
+
+
+### Custom Middleware
+
+```go
+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
+
+```go
+// 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 new Goroutines inside a middleware or handler, you **SHOULD NOT** use the original context inside it, you have to use a read-only copy.
+
+```go
+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:
+
+```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
+
+example for 1-line LetsEncrypt HTTPS servers.
+
+```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"))
+}
+```
+
+example for custom autocert manager.
+
+```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
+
+See the [question](https://github.com/gin-gonic/gin/issues/346) and try the following example:
+
+```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
+
+Do you want to graceful restart or stop your web server?
+There are some ways this can be done.
+
+We can use [fvbock/endless](https://github.com/fvbock/endless) to replace the default `ListenAndServe`. Refer issue [#296](https://github.com/gin-gonic/gin/issues/296) for more details.
+
+```go
+router := gin.Default()
+router.GET("/", handler)
+// [...]
+endless.ListenAndServe(":4242", router)
+```
+
+An alternative to endless:
+
+* [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](https://github.com/gin-gonic/examples/tree/master/graceful-shutdown) example with gin.
+
+```go
+// +build go1.8
+
+package main
+
+import (
+ "context"
+ "log"
+ "net/http"
+ "os"
+ "os/signal"
+ "syscall"
+ "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)
+ // kill (no param) default send syscanll.SIGTERM
+ // kill -2 is syscall.SIGINT
+ // kill -9 is syscall. SIGKILL but can"t be catch, so don't need add it
+ signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+ <-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)
+ }
+ // catching ctx.Done(). timeout of 5 seconds.
+ select {
+ case <-ctx.Done():
+ log.Println("timeout of 5 seconds.")
+ }
+ log.Println("Server exiting")
+}
+```
+
+### Build a single binary with templates
+
+You can build a server into a single binary containing templates by using [go-assets][].
+
+[go-assets]: https://github.com/jessevdk/go-assets
+
+```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 `https://github.com/gin-gonic/examples/tree/master/assets-in-binary` directory.
+
+### Bind form-data request with custom struct
+
+The follow example using custom struct:
+
+```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"}}
+```
+
+### Try to bind body into different structs
+
+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)).
+
+### http2 server push
+
+http.Pusher is supported only **go1.8+**. See the [golang blog](https://blog.golang.org/h2push) for detail information.
+
+```go
+package main
+
+import (
+ "html/template"
+ "log"
+
+ "github.com/gin-gonic/gin"
+)
+
+var html = template.Must(template.New("https").Parse(`
+
+
+ Https Test
+
+
+
+ Welcome, Ginner!
+
+
+`))
+
+func main() {
+ r := gin.Default()
+ r.Static("/assets", "./assets")
+ r.SetHTMLTemplate(html)
+
+ r.GET("/", func(c *gin.Context) {
+ if pusher := c.Writer.Pusher(); pusher != nil {
+ // use pusher.Push() to do server push
+ if err := pusher.Push("/assets/app.js", nil); err != nil {
+ log.Printf("Failed to push: %v", err)
+ }
+ }
+ c.HTML(200, "https", gin.H{
+ "status": "success",
+ })
+ })
+
+ // Listen and Server in https://127.0.0.1:8080
+ r.RunTLS(":8080", "./testdata/server.pem", "./testdata/server.key")
+}
+```
+
+### Define format for the log of routes
+
+The default log of routes is:
+```
+[GIN-debug] POST /foo --> main.main.func1 (3 handlers)
+[GIN-debug] GET /bar --> main.main.func2 (3 handlers)
+[GIN-debug] GET /status --> main.main.func3 (3 handlers)
+```
+
+If you want to log this information in given format (e.g. JSON, key values or something else), then you can define this format with `gin.DebugPrintRouteFunc`.
+In the example below, we log all routes with standard log package but you can use another log tools that suits of your needs.
+```go
+import (
+ "log"
+ "net/http"
+
+ "github.com/gin-gonic/gin"
+)
+
+func main() {
+ r := gin.Default()
+ gin.DebugPrintRouteFunc = func(httpMethod, absolutePath, handlerName string, nuHandlers int) {
+ log.Printf("endpoint %v %v %v %v\n", httpMethod, absolutePath, handlerName, nuHandlers)
+ }
+
+ r.POST("/foo", func(c *gin.Context) {
+ c.JSON(http.StatusOK, "foo")
+ })
+
+ r.GET("/bar", func(c *gin.Context) {
+ c.JSON(http.StatusOK, "bar")
+ })
+
+ r.GET("/status", func(c *gin.Context) {
+ c.JSON(http.StatusOK, "ok")
+ })
+
+ // Listen and Server in http://0.0.0.0:8080
+ r.Run()
+}
+```
+
+### Set and get a cookie
+
+```go
+import (
+ "fmt"
+
+ "github.com/gin-gonic/gin"
+)
+
+func main() {
+
+ router := gin.Default()
+
+ router.GET("/cookie", func(c *gin.Context) {
+
+ cookie, err := c.Cookie("gin_cookie")
+
+ if err != nil {
+ cookie = "NotSet"
+ c.SetCookie("gin_cookie", "test", 3600, "/", "localhost", false, true)
+ }
+
+ fmt.Printf("Cookie value: %s \n", cookie)
+ })
+
+ router.Run()
+}
+```
+
+
+## Testing
+
+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
-[Gin website](https://gin-gonic.com/docs/users/) lists some awesome projects made with Gin web framework.
-
-## Contributing
-
-Gin is the work of hundreds of contributors. We appreciate your help!
-
-Please see [CONTRIBUTING](CONTRIBUTING.md) for details on submitting patches and the contribution workflow.
+Awesome project lists using [Gin](https://github.com/gin-gonic/gin) web framework.
+* [gorush](https://github.com/appleboy/gorush): A push notification server written in Go.
+* [fnproject](https://github.com/fnproject/fn): The container native, cloud agnostic serverless platform.
+* [photoprism](https://github.com/photoprism/photoprism): Personal photo management powered by Go and Google TensorFlow.
+* [krakend](https://github.com/devopsfaith/krakend): Ultra performant API Gateway with middlewares.
+* [picfit](https://github.com/thoas/picfit): An image resizing server written in Go.