如何组织大猩猩mux路线?

时间:2015-12-31 14:53:22

标签: go gorilla

我正在使用Gorilla Mux编写REST API,但我在组织路由时遇到问题,目前我的所有路由都在main.go文件中定义,如此

//main.go
package main

import (
    "NovAPI/routes"
    "fmt"
    "github.com/gorilla/mux"
    "net/http"
)

func main() {

    router := mux.NewRouter().StrictSlash(true)

    router.HandleFunc("/hello", func(res http.ResponseWriter, req *http.Request) {
        fmt.Fprintln(res, "Hello")
    })

    router.HandleFunc("/user", func(res http.ResponseWriter, req *http.Request) {
        fmt.Fprintln(res, "User")
    })

    router.HandleFunc("/route2", func(res http.ResponseWriter, req *http.Request) {
        fmt.Fprintln(res, "Route2")
    })

    router.HandleFunc("/route3", func(res http.ResponseWriter, req *http.Request) {
        fmt.Fprintln(res, "Route3")
    })

    // route declarations continue like this

    http.ListenAndServe(":1128", router)

}

所以我想要做的就是取出并将这个路由声明拆分成多个文件,我将如何去做呢? 提前致谢。

3 个答案:

答案 0 :(得分:7)

这样的事情怎么样?

//main.go
package main

import (
    "NovAPI/routes"
    "fmt"
    "github.com/gorilla/mux"
    "net/http"
)

func main() {

    router := mux.NewRouter().StrictSlash(true)

    router.HandleFunc("/hello", HelloHandler)
    router.HandleFunc("/user", UserHandler)
    router.HandleFunc("/route2", Route2Handler)
    router.HandleFunc("/route3", Route3Handler)
    // route declarations continue like this

    http.ListenAndServe(":1128", router)

}

func HelloHandler(res http.ResponseWriter, req *http.Request) {
    fmt.Fprintln(res, "Hello")
}

func UserHandler(res http.ResponseWriter, req *http.Request) {
    fmt.Fprintln(res, "User")
}

func Route2Handler(res http.ResponseWriter, req *http.Request) {
    fmt.Fprintln(res, "Route2")
}

func Route3Handler(res http.ResponseWriter, req *http.Request) {
    fmt.Fprintln(res, "Route3")
}

通过这种方式,您可以将处理程序放在其他文件中,甚至是其他程序包中。

如果您最终使用数据库等附加依赖项,您甚至可以使用构造函数技巧来避免使用全局变量:

//main.go

func main() {
    db := sql.Open(…)

    //...

    router.HandleFunc("/hello", NewHelloHandler(db))

    //...
}

func NewHelloHandler(db *sql.DB) func(http.ResponseWriter, *http.Request) {
    return func(res http.ResponseWriter, req *http.Request) {
        // db is in the local scope, and you can even inject it to test your
        // handler
        fmt.Fprintln(res, "Hello")
    }
}

答案 1 :(得分:5)

您可以将路由器独立地模块化为不同的软件包,然后将其安装在主路由器上

仅对以下issue进行详细说明,您可以提出这种方法,使其具有相当的可扩展性(在某种程度上更易于测试)

/api/router.go

package api

import (
    "net/http"

    "github.com/gorilla/mux"
)

func Router() *mux.Router {
    router := mux.NewRouter()
    router.HandleFunc("/", home)
    return router
}

func home(w http.ResponseWriter, req *http.Request) {
    w.Write([]byte("hello from API"))
}

/main.go

package main

import (
    "log"
    "net/http"
    "strings"

    "github.com/...yourPath.../api"
    "github.com/...yourPath.../user"
    "github.com/gorilla/mux"
)

func main() {
    router := mux.NewRouter()

    router.HandleFunc("/", home)
    mount(router, "/api", api.Router())
    mount(router, "/user", user.Router())

    log.Fatal(http.ListenAndServe(":8080", router))
}

func mount(r *mux.Router, path string, handler http.Handler) {
    r.PathPrefix(path).Handler(
        http.StripPrefix(
            strings.TrimSuffix(path, "/"),
            handler,
        ),
    )
}

func home(w http.ResponseWriter, req *http.Request) {
    w.Write([]byte("Home"))
}

答案 2 :(得分:3)

我喜欢查看github中的其他项目以获取有关如何处理内容的想法,对于这些情况,我通常首先查看Docker repo。这就是他们这样做的方式:

对于system的路由,在system_routes.go中定义所有处理程序,然后在system.go中的NewRouter函数上初始化这些路由。

type systemRouter struct {
    backend Backend
    routes  []router.Route
}

func NewRouter(b Backend) router.Router {
    r := &systemRouter{
        backend: b,
    }

    r.routes = []router.Route{
        local.NewOptionsRoute("/", optionsHandler),
        local.NewGetRoute("/_ping", pingHandler),
        local.NewGetRoute("/events", r.getEvents),
        local.NewGetRoute("/info", r.getInfo),
        local.NewGetRoute("/version", r.getVersion),
        local.NewPostRoute("/auth", r.postAuth),
    }

    return r
}

// Routes return all the API routes dedicated to the docker system.
func (s *systemRouter) Routes() []router.Route {
    return s.routes
}

请注意,systemRouter实现router.Router接口,Routes函数返回[] router.Route,其处理程序定义为

func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error

而不是Go的标准http处理程序:

func(w http.ResponseWriter, r *http.Request)

因此,在makeHttpHandler函数中有一个额外的代码可以将Docker API处理程序转换为Go HTTP处理程序。

最后,要将这些路由添加到他们的mux路由器,在他们的server.go上,他们将add middleware的其他几个函数实现给他们的处理程序。

如果你认为这是你正在寻找的东西,那么花点时间分析他们路线的Docker代码,如果你需要我详细说明或者我错过了什么,发表评论。