如何将子域与 gorilla mux 匹配

Question

我需要使用 gorilla mux路由器构建一个匹配两个子域（prefix.api.example.com 和 prefix.api.sandbox.example.com）的路由。到目前为止，我有下面的正则表达式，但路由器在请求时返回 404。知道为什么吗？

router := mux.NewRouter()

route :=  router.Host(`prefix.api{_:(^$|^\.sandbox$)}.example.com`)

更多代码

package main

import(

    "github.com/gorilla/mux"

    "net/http"

)

type handler struct{}

func (_ handler)ServeHTTP(w http.ResponseWriter, r *http.Request){

    w.Write([]byte("hello world"))

    w.WriteHeader(200)

}

func main() {

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

    route :=  router.Host(`prefix.api{_:(^$|^\.sandbox$)}.example.com`)

    route.Handler(handler{})

    http.Handle("/", router)

      panic(http.ListenAndServe(":80", nil))

}

要求：

$ curl prefix.api.sandbox.example.com/any -v

*   Trying 127.0.0.1...

* Connected to prefix.api.sandbox.example.com (127.0.0.1) port 80 (#0)

> GET /some HTTP/1.1

> Host: prefix.api.sandbox.example.com

> User-Agent: curl/7.43.0

> Accept: */*

> 

< HTTP/1.1 404 Not Found

< Content-Type: text/plain; charset=utf-8

< X-Content-Type-Options: nosniff

< Date: Wed, 01 Jun 2016 22:08:21 GMT

< Content-Length: 19

< 

404 page not found

* Connection #0 to host prefix.api.sandbox.example.com left intact

Answer 1

用于匹配行首和行尾的元字符^和$元字符应该被删除，括号也可以。route := router.Host(`prefix.api{_:|\.sandbox}.example.com`)`我的主机文件：○ grep prefix /etc/hosts127.0.0.1&nbsp; &nbsp;prefix.api.example.com127.0.0.1&nbsp; &nbsp;prefix.api.sandbox.example.com127.0.0.1&nbsp; &nbsp;prefix.api.xsandbox.example.com给了我以下内容：○ curl prefix.api.example.com:8000hello world%&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;○ curl prefix.api.sandbox.example.com:8000hello world%&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;○ curl prefix.api.xsandbox.example.com:8000404 page not found更新：这是两个不同.Host()的生成的正则表达式：route :=&nbsp; router.Host(`prefix.api{_:(^$|^\.sandbox$)}.example.com`)正则表达式： ^prefix\.api(?P<v0>(^$|^\.sandbox$))\.example\.com$route := router.Host(`prefix.api{_:|\.sandbox}.example.com`)正则表达式： ^prefix\.api(?P<v0>|\.sandbox)\.example\.com$两个正则表达式的示例测试都可以 在 play.golang 中使用