simple go http server

main.go

package main

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

func handle(writer http.ResponseWriter, request *http.Request) {
    log.Printf("%s", request.URL.Path)

    if "ok" == request.URL.Path[1:] {
        writer.WriteHeader(http.StatusOK)
        fmt.Fprintf(writer, "OK\n")
    } else if "fail" == request.URL.Path[1:] {
        writer.WriteHeader(http.StatusInternalServerError)
        fmt.Fprintf(writer, "FAIL\n")
    } else {
        writer.WriteHeader(http.StatusOK)
        fmt.Fprintf(writer, "Hello, World!\n")
    }
}

func main() {
    port := os.Getenv("PORT")
    if port == "" {
        port = "8080"
    }

    http.HandleFunc("/", handle)
    log.Printf("server started on port %v", port)
    log.Fatal(http.ListenAndServe(":"+port, nil))
}