gorilla/mux 怎么实现 /{locale}/hi 和 /hi 指向同一个路由

以标准库为例：

```
package main

import (
"fmt"
"net/http"
)

func main() {
mux := http.NewServeMux()
mux.HandleFunc("/hi", Language)
mux.HandleFunc("/{lang}/hi", Language)

http.ListenAndServe(":9999", mux)
}

func Language(w http.ResponseWriter, r *http.Request) {
lang := r.PathValue("lang")
if lang == "" {
lang = r.Header.Get("Accept-Language")
}

fmt.Println(lang)
w.Write([]byte(lang))
}
```

hingle

2024-04-17 10:07:01 +08:00

有个方案，可以中间件获取到 locale 后，重定向到 /{locale}/hi

dzdh

2024-04-17 10:16:05 +08:00

@bv 这样还是定义了两个路由。。

@hingle 那要是有十几个一两百个路由呢。比如 /{locale}/product/{title} 访问 /product/a-b-c-d-e 也要要求能匹配到路由

xiaoyiyu

2024-04-17 10:22:14 +08:00

```go
var global = http.NewServeMux()
var mux1 = http.NewServeMux()
mux1.HandleFunc("/api", func(w http.ResponseWriter, r *http.Request) {

})
global.Handle("/", mux1)
global.Handle("/{locale}/", mux1)
http.ListenAndServe("", global)
```
这样试下

dzdh

2024-04-17 11:16:20 +08:00

@xiaoyiyu 这个思路真的是。。。。我试试

dzdh

2024-04-17 16:50:37 +08:00

@xiaoyiyu 貌似也不行。

xiaoyiyu

2024-04-18 11:35:31 +08:00

```go
var langs = map[string]bool{
"cn": true,
"en": true,
"jp": true,
"ru": true,
}

func main() {
var global = http.NewServeMux()
var mux = http.NewServeMux()

mux.HandleFunc("/api/asd", func(w http.ResponseWriter, r *http.Request) {
fmt.Println("hello asadsdd")
fmt.Fprintf(w, "hello format")
})

global.Handle("/{locale}/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Println(r.PathValue("locale"))
if lng := r.PathValue("locale"); langs[lng] {
http.StripPrefix("/"+lng, mux).ServeHTTP(w, r)
} else {
mux.ServeHTTP(w, r)
}
}))

http.ListenAndServe(":12345", global)
}
```

curl http://localhost:12345/en/api/asd
hello format%
curl http://localhost:12345/cn/api/asd
hello format%
curl http://localhost:12345/api/asd
hello format%
curl http://localhost:12345/ad/api/asd
404 page not found

看效果是满足了的
@dzdh
@dzdh