关于go:goGIN入门到持续更新中

go-GIN入门到....(继续更新中)

装置gin

• 参考

  https://gin-gonic.com/docs/quickstart/

• 设置环境变量

  export GOPATH=~/golangexport PATH=$PATH:$GOPATH/bin# or by vim ~/.bashrc or by ~/.zshrc

• gin

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

疾速开始

• 创立文件

  // example.gopackage mainimport(    "github.com/gin-gonic/gin")func main(){    r := gin.Default()    r.GET("/", func(c *gin.Context){        c.JSON(200, gin.H{            "msg": "pong",        })    })    r.Run()}

• 运行文件

  $ go run main.go[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production. - using env:   export GIN_MODE=release - using code:  gin.SetMode(gin.ReleaseMode)[GIN-debug] GET    /                         --> main.main.func1 (3 handlers)[GIN-debug] [WARNING] You trusted all proxies, this is NOT safe. We recommend you to set a value.Please check https://pkg.go.dev/github.com/gin-gonic/gin#readme-don-t-trust-all-proxies for details.[GIN-debug] Environment variable PORT is undefined. Using port :8080 by default[GIN-debug] Listening and serving HTTP on :8080

路由

• 无参数

  r.GET("/hello", func(c *gin.Context){    c.String(200, "hello")})

  $ curl http://127.0.0.1:8080/hellohello %

• 动静路由

  r.GET("/hello/:name", func(c *gin.Context){    name := c.Param("name")    c.String(200, name)})

  $ curl http://127.0.0.1:8080/hello/golanggolang

• 带Query参数

  //     hello?name=xxx&age=xxxr.GET("/hello", func(c *gin.Context){    name := c.Query("name")    age := c.DefaultQuery("age", "18") // 不存在取左边的默认值    c.String(200, "%s: %s", name, age)})

  $ curl http://127.0.0.1:8080/hello?name=golanggolang: 18

• 获取POST参数

  r.POST("/hello", func(c *gin.Context){    name := c.PostForm("name")    age := c.DefaultPostForm("age", "18")    c.JSON(200, gin.H{        "name": name,        "age": age,    })})

  $ curl http://127.0.0.1:8080/hello -X POST -d 'name=golang&age=26'{"age":"26","name":"golang"}

• Map参数(字典参数)

  r.POST("/hello", func(c *gin.Context){    ages := c.QueryMap("ages")    names := c.PostFormMap("names")    c.JSON(200, gin.H{        "name": names,        "age": ages,    })})

  $ curl -g "http://localhost:8080/hello?ages[a]=18&ages[b]=26" -X POST -d 'names[a]=Sam&names[b]=David'{"age":{"a":"18","b":"26"},"name":{"a":"Sam","b":"David"}}

• 重定向(Redirect)

  r.GET("/goIndex", func(c *gin.Context){    c.Request.URL.Path = "/"    r.HandleContext(c)})

  $ curl http://127.0.0.1:8080/goIndex{"msg":"pong"}

• 分组路由(Grouping Routes)

      defaultHandler := func(c *gin.Context) {        c.JSON(200, gin.H{            "path": c.FullPath(),        })    }    // group: v1    v1 := r.Group("/v1")    {        v1.GET("/name1", defaultHandler)        v1.GET("/name2", defaultHandler)    }    // group: v2    v2 := r.Group("/v2")    {        v2.GET("/name1", defaultHandler)        v2.GET("/name2", defaultHandler)    }

  $ curl http://127.0.0.1:8080/v1/name1{"path":"/v1/name1"}                                    $ curl http://127.0.0.1:8080/v1/name2{"path":"/v1/name2"}                                         $ curl http://127.0.0.1:8080/v2/name1{"path":"/v2/name1"}                                         $ curl http://127.0.0.1:8080/v2/name2{"path":"/v2/name2"}