golang http：如何将请求路由到处理程序

Question

I'm newbie on Golang and have a simple question about building a web server.

Saying that my web server has users so the users can change their names and their passwords. Here is how I design the URLs:

/users/Test         GET
/users/Test/rename       POST   newname=Test2
/users/Test/newpassword  POST   newpassword=PWD

The first line is to show the information of the user named Test. The second and the third is to rename and to reset password.

So I'm thinking that I need to use some regular expression to match the HTTP requests, things like http.HandleFunc("/users/{\w}+", controller.UsersHandler).

However, it doesn't seem that Golang supports such a thing. So does it mean that I have to change my design? For example, to show the information of the user Test, I have to do /users GET name=Test?

Answer 1

You may want to run pattern matching on r.URL.Path, using the regex package (in your case you may need it on POST) This post shows some pattern matching samples. As @Eugene suggests there are routers/http utility packages also which can help.

Here's something which can give you some ideas, in case you don't want to use other packages:

In main:

http.HandleFunc("/", multiplexer)
...
func multiplexer(w http.ResponseWriter, r *http.Request) {
    switch r.method {
    case "GET":
        getHandler(w, r)
    case "POST":
        postHandler(w, r)
    }
}

func getHandler(w http.ResponseWriter, r *http.Request) {

    //Match r.URL.path here as required using switch/use regex on it
}

func postHandler(w http.ResponseWriter, r *http.Request) {

    //Regex as needed on r.URL.Path 
    //and then get the values POSTed
    name := r.FormValue("newname")
}