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。知道为什么会这样吗?
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))
}
请求:
$ 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
答案 0 :(得分:2)
应删除用于匹配行的开头和结尾的^
和$
元字符,也可以删除parens。
route := router.Host(`prefix.api{_:|\.sandbox}.example.com`)`
我的主人档案:
○ grep prefix /etc/hosts
127.0.0.1 prefix.api.example.com
127.0.0.1 prefix.api.sandbox.example.com
127.0.0.1 prefix.api.xsandbox.example.com
给我以下内容:
○ curl prefix.api.example.com:8000
hello world%
○ curl prefix.api.sandbox.example.com:8000
hello world%
○ curl prefix.api.xsandbox.example.com:8000
404 page not found
<强>更新强>
以下是两个不同的.Host()
生成的正则表达式:
route := router.Host(`prefix.api{_:(^$|^\.sandbox$)}.example.com`)
regexp:^prefix\.api(?P<v0>(^$|^\.sandbox$))\.example\.com$
route := router.Host(`prefix.api{_:|\.sandbox}.example.com`)
regexp:^prefix\.api(?P<v0>|\.sandbox)\.example\.com$