Create and view

Context Path	Handler	Action	Method
/	home	Home page	GET
/view	newsView	View	GET
/create	create	Create	POST

Update main.go:

main.go

package main

import (
    "log"
    "net/http"
)

func home(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("News Feeder - HOME"))
}

func newsView(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("News Feeder - READ"))
}

func newsCreate(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("News Feeder - CREATE"))
}

func main() {
    mux := http.NewServeMux()
    mux.HandleFunc("/", home)
    mux.HandleFunc("/view", newsView)
    mux.HandleFunc("/create", newsCreate)

    log.Print("starting server on :8080")

    err := http.ListenAndServe(":8080", mux)
    log.Fatal(err)
}

Go’s servemux supports two different types of URL patterns: fixed paths and subtree paths. Fixed paths don’t end with a trailing slash, whereas subtree paths do end with a trailing slash.

You can think of subtree paths as acting a bit like they have a wildcard at the end, like /** or /static/**, which helps explain why the / pattern is acting like a catch-all.

To avoid this behavior, include the following code in the home function:

 if r.URL.Path != "/" {
        http.NotFound(w, r)
        return
    }

Restrict Method

main.go

package main

import (
    "log"
    "net/http"
)

func home(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("News Feeder - HOME"))
}

func newsView(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("News Feeder - READ"))
}

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

    if r.Method != "POST" {
        w.Header().Set("Allow", "POST")
        http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
        return
    }

    w.Write([]byte("News Feeder - CREATE"))
}

func main() {
    mux := http.NewServeMux()
    mux.HandleFunc("/", home)
    mux.HandleFunc("/view", newsView)
    mux.HandleFunc("/create", newsCreate)

    log.Print("starting server on :8080")

    err := http.ListenAndServe(":8080", mux)
    log.Fatal(err)
}