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Go HandlerFunc()

How to use http.HandlerFunc in Go to convert regular functions into HTTP handlers and register them with http.Handle.

Posted Updated
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By Jan Toth
1 min read

This program demonstrates Go’s http.HandlerFunc type adapter. The http.HandlerFunc function converts a regular function with the (http.ResponseWriter, *http.Request) signature into a type that satisfies the http.Handler interface, allowing it to be passed to http.Handle. This is useful when you want to use the Handle method instead of HandleFunc.

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package main

import (
	"io"
	"net/http"
)


func dogs(w http.ResponseWriter, r *http.Request) {
	io.WriteString(w, "This is the web about dogs!\n")
}


func cats(w http.ResponseWriter, r *http.Request)  {
	io.WriteString(w, "This is the web about cats!\n")
}

func main() {

	http.Handle("/dogs/", http.HandlerFunc(dogs))
	http.Handle("/cats",  http.HandlerFunc(cats))

	http.ListenAndServe(":8080", nil)

}
Go
go
This post is licensed under CC BY 4.0 by the author.