如何在go httprouter: /hello/:name和/hello/b/c中处理这些路由？

Question

httprouter不允许这一点，并在开始时惊慌。

httprouter :恐慌:通配符路由:名称与路径'/hello/:name‘中现有子节点的冲突。

据我所知，

"/hello/:name“有两个部分，但是/hello/b/c有三个部分。

" /hello /:name“将与任何url匹配，其中有两个前缀为/hello的部分

" /hello/b/c“只匹配/hello/b/c

package main

import (
    "fmt"
    "log"
    "net/http"

    "github.com/julienschmidt/httprouter"
)

func Index(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
    fmt.Fprint(w, "Welcome!\n")
}

func Index2(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
    fmt.Fprint(w, "Welcome222!\n")
}

func main() {
    router := httprouter.New()
    router.GET("/hello/b/c", Index2)

    router.GET("/hello/:name", Index)

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

Answer 1

您可以删除行router.GET("/hello/b/c", Index2)，然后拥有：

func Index(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
    if strings.HasPrefix(ps.ByName("name"), "b/c") {
        return Index2(w, r, ps)
    } else {
        fmt.Fprint(w, "Welcome!\n")
    }
}