Golang http.HandleFunc不适用于子弹

Question

Hi I am working on a golang project. When I try to use slugs with http.HandleFunc I get a "404 page not found error". When I take the slug out my routing works again.

In main I have:

  http.HandleFunc("/products/feedback/{slug}", AddFeedbackHandler)

Which calls:

var AddFeedbackHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request){
  w.Write([]byte("ChecksOut"))
})

When I replace the path with:

  http.HandleFunc("/products/feedback", AddFeedbackHandler)

It works again. What might be causing this? Please forgive me if this is a basic question, I am new to golang and still trying to get the hang of it. Thanks!

Answer 1

Try the following:

const feedbackPath = "/products/feedback/"  // note trailing slash.

func AddFeedbackHandler(w http.ResponseWriter, r *http.Request) {
  var slug string
  if strings.HasPrefix(r.URL.Path, feedbackPath) {
      slug = r.URL.Path[len(feedbackPath):]
  }
  fmt.Println("the slug is: ", slug)
  w.Write([]byte("ChecksOut"))
}

Add the handler with this code:

http.HandleFunc(feedbackPath, AddFeedbackHandler)

The trailing slash on the path is required for a subtree match. You can read the details on the use of the trailing slash in the ServeMux documentation.

playground example