traefik/examples/accessLog/exampleHandler.go

47 lines
951 B
Go
Raw Normal View History

2016-04-19 23:45:59 +00:00
/*
Simple program to start a web server on a specified port
*/
package main
import (
"flag"
"fmt"
"net/http"
"os"
)
var (
name string
port int
help *bool
)
func init() {
flag.StringVar(&name, "n", "", "Name of handler for messages")
flag.IntVar(&port, "p", 0, "Port number to listen")
help = flag.Bool("h", false, "Displays help message")
}
func usage() {
fmt.Printf("Usage: example -n name -p port \n")
os.Exit(2)
}
func handler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "%s: Received query %s!\n", name, r.URL.Path[1:])
}
func main() {
flag.Parse()
if *help || len(name) == 0 || port <= 0 {
usage()
}
http.HandleFunc("/", handler)
fmt.Printf("%s: Listening on :%d...\n", name, port)
if er := http.ListenAndServe(fmt.Sprintf(":%d", port), nil); er != nil {
fmt.Printf("%s: Error from ListenAndServe: %s", name, er.Error())
os.Exit(1)
}
fmt.Printf("%s: How'd we get past listen and serve???\n", name)
}