Issues with new routing feature from Go 1.22

Getting Help
1

Golang version 1.22.0 introduces Rest style routing with the http router. It is supposed to support routing enhancements according to this blog article: Routing Enhancements for Go 1.22 - The Go Programming Language

For example

http.Handle(“GET /posts/{id}”, handlePost2)

would allow you to do

idString := req.PathValue(“id”)

I am using the following Golang program:

package main

import (
	"fmt"
	"log"
	"net/http"
)

func main() {
	http.HandleFunc("GET /articles/{id}", articles)

	log.Fatalln(http.ListenAndServe(":8080", nil))
}

func articles(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintln(w, "hello")
}

However, when I use this curl command

curl -X GET localhost:8080/articles/11

I get a 404 page not found

I am using the latest go version:

go version
go version go1.22.0 linux/amd64

I am running the program with “go run”

I expected my handler to handle this according to this routing. Why is that?

2

check your go.mod version when upgrading to Go 1.22

1 Like
3

Hi,

I tries this Go Playground - The Go Programming Language and it works.
Are you sure you’re using Go v1.22 ?

4

Thank you! That fixed it.

I was sure I was using the right version as I was able to use r.PathValue(). Maybe PathValue was introduced in an earlier version?

If anyone ever has this issue, you can run this from the terminal to update it:

go mod edit -go=1.22

5

Thanks! That’s what it was, I needed to update my go mod file. Lesson learned for next time, running “go version” isn’t enough, the mod file has to be updated too.