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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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"log"
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"net/http"
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"os"
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"os/signal"
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"strings"
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"syscall"
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"time"
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)
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var options struct {
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port int
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hostname string
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}
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func bail(status int, template string, args ...interface{}) {
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if !strings.HasSuffix(template, "\n") {
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template += "\n"
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}
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if status == 0 {
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fmt.Fprintf(os.Stdout, template, args...)
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} else {
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fmt.Fprintf(os.Stderr, template, args...)
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}
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os.Exit(status)
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}
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func main() {
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flag.Parse()
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cwd, err := os.Getwd()
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if err != nil {
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bail(1, "unable to get working directory: %v", err)
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}
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dir := http.Dir(cwd)
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http.Handle("/", &logWrapper{http.FileServer(dir)})
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addr := fmt.Sprintf("%s:%d", options.hostname, options.port)
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go func() {
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started := false
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for i := 0; i < 30; i++ {
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start := time.Now()
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err := http.ListenAndServe(addr, nil)
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if time.Since(start) > time.Second {
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started = true
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break
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} else {
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fmt.Fprintf(os.Stderr, "failed to start listener: %v\n", err)
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time.Sleep(time.Second)
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}
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}
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if !started {
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bail(1, "never started successfully")
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}
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}()
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s := make(chan os.Signal, 1)
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signal.Notify(s, syscall.SIGINT)
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<-s
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fmt.Println("caught SIGINIT, shutting down")
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}
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func init() {
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flag.IntVar(&options.port, "port", 8000, "port to serve on")
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flag.StringVar(&options.hostname, "host", "", "hostname")
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log.SetOutput(os.Stdout)
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log.SetFlags(log.Ldate | log.Lmicroseconds)
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}
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