go - net/http 呈现根路由，即使我转到不存在的路由

Question

我有这些路线:

  http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
    renderAndExecuteTemplate(w, r, "page/index.tmpl", nil)
  })

  http.HandleFunc("/route1", func(w http.ResponseWriter, r *http.Request) {
    renderAndExecuteTemplate(w, r, "page/route1.tmpl", nil)
  })


  http.HandleFunc("/route2", func(w http.ResponseWriter, r *http.Request) {
    renderAndExecuteTemplate(w, r, "page/route2.tmpl", nil)
  })

有效。

但是，当我转到不存在的路由时:“localhost/fdsafdsafdsfds”，它仍然呈现“索引”页面。

为什么？如何预防呢？

Answer 1

来自docs :

Note that since a pattern ending in a slash names a rooted subtree, the pattern "/" matches all paths not matched by other registered patterns, not just the URL with Path == "/".

防止这种情况的一种方法是构建一个查看请求的处理程序:

http.HandleFunc("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request){
  if r.URL.Path != "/" {
    w.WriteHeader(http.StatusNotFound)
    return
  }

  renderAndExecuteTemplate(w, r, "page/index.tmpl", nil)
})