Page Not Found - Go
In my previous TIL post about custom routing, I did not specify any page or message once a request is asking for a resource that is not found in the server. Below is the way how it could be added:
package main
import (
"fmt"
"net/http"
)
func homeHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.Header().Add("Fake", "my fake header")
fmt.Fprint(w, "<h1> Welcome to my site </h1>")
}
func contactHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
fmt.Fprint(w, "<h1> Contact Page </h1><p> To get in touch, email me at <a href=\"mailto:rabocse@alexrabocse.me\"> rabocse@alexrabocse.me </a>.")
}
func pathHandler(w http.ResponseWriter, r *http.Request) {
switch r.URL.Path {
case "/":
homeHandler(w, r)
case "/contact":
contactHandler(w, r)
default:
// http.Error(w, "Page Not Found... ", http.StatusNotFound)
w.WriteHeader(http.StatusNotFound)
fmt.Fprint(w, "Page Not Found")
}
}
func main() {
http.HandleFunc("/", pathHandler)
fmt.Println("Starting the server on :3000...")
http.ListenAndServe(":3000", nil)
}
Notice that the source code is showing two ways to acomplish it:
- fmt.Fprint and w.WriteHeader.
- http.Error.
The second one is of course commented out but any of those could be used.
Here I can see the results:
❯ curl localhost:3000/contact
<h1> Contact Page </h1><p> To get in touch, email me at <a href="mailto:rabocse@alexrabocse.me"> rabocse@alexrabocse.me </a>.%
❯ curl localhost:3000/kkkkkk
Page Not Found%