Example code to use the Golang httprouter library

Description.md

More details in my blogpost at https://blog.sandipb.net/2020/08/05/notes-on-the-httprouter-golang-library/

httprouter_example.go

// Copied in parts as is from official docs
package main

import (
    "fmt"
    "net/http"
    "os"
    "strings"

    "github.com/julienschmidt/httprouter"
)

func Index(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
    fmt.Fprintln(w, "Hello there!")
}

func Hello(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
    fmt.Fprintf(w, "hello, %s!\n", ps.ByName("name"))
}

func Welcome(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
    fmt.Fprintf(w, "Welcome, %s to %s!\n",
        ps.ByName("name"), strings.TrimLeft(ps.ByName("where"), "/"))
}

func Salut(w http.ResponseWriter, r *http.Request) {
    ps := httprouter.ParamsFromContext(r.Context()) // ... (A)
    fmt.Fprintf(w, "Salut, %s!\n", ps.ByName("name"))
}

func main() {
    router := httprouter.New()
    router.GET("/", Index)
    router.GET("/hello/:name", Hello)
    router.HandlerFunc("GET", "/salut/:name", Salut) // ... (B)
    router.GET("/welcome/:name/*where", Welcome) // ... (C)
    curDir, _ := os.Getwd()
    router.ServeFiles("/files/*filepath", http.Dir(curDir)) // ... (D)

    http.ListenAndServe("localhost:8888", router)
}