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