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99 lines
1.7 KiB
Go
99 lines
1.7 KiB
Go
package main
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import (
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"context"
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_ "embed"
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"flag"
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"fmt"
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"log"
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"net"
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"net/http"
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"os"
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"os/signal"
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"time"
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)
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var log_error = log.New(os.Stderr, "", 0)
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var log_info = log.New(os.Stdout, "", 0)
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func bail(status int, t string, args ...interface{}) {
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if status != 0 {
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shutdown(fmt.Errorf(t, args...))
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} else {
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log_info.Printf(t, args...)
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shutdown(nil)
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}
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}
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//go:embed usage
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var usage string
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var options struct {
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Path string
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}
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func run() error {
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addr, err := net.ResolveUnixAddr("unix", options.Path)
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if err != nil {
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return fmt.Errorf("bad listen address: %w", err)
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}
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l, err := net.ListenUnix("unix", addr)
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if err != nil {
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return fmt.Errorf("unable to open unix socket: %w", err)
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}
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os.Chmod(options.Path, 0777)
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server := http.Server{
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Handler: new(handler),
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}
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onShutdown(func() error {
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log_info.Print("shutting down http server")
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return server.Shutdown(context.TODO())
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})
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// ??
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start := time.Now()
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err = server.Serve(l)
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if err != nil {
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// I dunno how to check for the right error, offhand
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if time.Since(start) < time.Second {
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return fmt.Errorf("unable to start server: %v", err)
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}
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}
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log_info.Printf("http serve result: %v", err)
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return nil
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}
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func sigCancel(ctx context.Context) context.Context {
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c := make(chan os.Signal, 1)
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signal.Notify(c, os.Interrupt)
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ctx, cancel := context.WithCancel(ctx)
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onShutdown(func() error { cancel(); return nil })
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go func() {
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<-c
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shutdown(nil)
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}()
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return ctx
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}
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func main() {
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flag.Parse()
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ctx := context.Background()
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ctx = sigCancel(ctx)
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if len(os.Args) != 2 {
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bail(1, usage)
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}
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if err := run(); err != nil {
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bail(1, err.Error())
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}
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}
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func init() {
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flag.StringVar(&options.Path, "l", "./http.sock", "path for a unix domain socket to listen on ")
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}
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