How to Efficiently Start a Browser After Server Initialization in Go?

Starting the Browser After Server Initialization in Go

In Go, the traditional approach of starting the browser before the server is ineffective because the server takes control of the main thread and blocks future actions. To resolve this, a more efficient approach is to open the listener, start the browser, and then enter the server loop.

package main

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

    "github.com/skratchdot/open-golang/open"
    "github.com/julienschmidt/httprouter"
)

func main() {
    r := httprouter.New()
    r.GET("/test", func(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
        fmt.Fprint(w, "Welcome!")
    })

    l, err := net.Listen("tcp", "localhost:3000")
    if err != nil {
        log.Fatal(err)
    }

    err = open.Start("http://localhost:3000/test")
    if err != nil {
        log.Println(err)
    }

    http.Serve(l, r)
    log.Fatal(err)
}

By separating the listener opening, browser starting, and server loop, you ensure that the browser is opened after the server is listening but before the server loop starts. This guarantees that the browser can connect to the server, eliminating the need for polling or reliance on specific browser behavior.

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