Sleep Server in Go. It just sleeps for a given time for any request. Useful for easy mock of backends.

sleepserver.go

package main

import (
        "flag"
        "fmt"
        "net/http"
        "time"
)

var defaultSleepTimeMs *int
var defaultStatusCode *int

func SleepServer(w http.ResponseWriter, r *http.Request) {
        sleep, err := time.ParseDuration(r.URL.Query().Get("sleep"))
        if err != nil {
                sleep = time.Duration(*defaultSleepTimeMs) * time.Millisecond
        }
        time.Sleep(sleep)
        w.WriteHeader(*defaultStatusCode)
}

func main() {
        port := flag.String("port", "8080", "port to serve on")
        defaultSleepTimeMs = flag.Int("sleep", 1000, "default sleep time")
        defaultStatusCode = flag.Int("status", 200, "default status code")
        flag.Parse()
        fmt.Printf("Starting server at port " + *port + "\n")

        http.HandleFunc("/", SleepServer)
        err := http.ListenAndServe(":"+*port, nil)
        if err != nil {
                fmt.Println(err)
        }
}