Golang HTTP Routing gin

This is a creation in Article, where the information may have evolved or changed.

Golang is already a very rich language, containing a lot of tools and libraries. Because the author often does the HTTP development work, therefore first explores the gin library.

Familiar with the use

First step: Install

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

Step Two: Referencing

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

Step Three: Code

   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}

Instructions for use

Use of parameters

Suppose C *.gin. Context, then:
1, get the route parameter is C. Param ("name"), for example

r.GET("/user/:name", func(c *gin.Context) {    name := c.Param("name")    c.String(http.StatusOK, "Hello %s", name)})

2, get HTTP querystring, use C. Query ("name"), for example:

r.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)})

3. Get the parameters of post, use C. Postform ("name")

Interface version Grouping

1, version is a guarantee of replacement

    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)    }

Middleware

Both front and back-end development involves middleware middleware. But the route is basically a middleware, and the author takes the other middleware as part of the route.
r: = Gin. New () does not contain middleware, but gin. Default is a middleware that contains logger and recovery.

Cond...