74 lines
1.4 KiB
Go
74 lines
1.4 KiB
Go
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package main
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import (
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"flag"
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"net/http/httputil"
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"net/url"
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"fmt"
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"net/http"
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"os/signal"
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"os"
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"context"
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"syscall"
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)
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var (
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certFile string
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keyFile string
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upstream string
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addr string
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)
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func init() {
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flag.StringVar(&certFile, "cert-file", "", "path to cert file")
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flag.StringVar(&keyFile, "key-file", "", "path to key file")
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flag.StringVar(&upstream, "upstream", "", "upstream address")
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flag.StringVar(&addr, "addr", ":443", "listen address")
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}
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func _main() error {
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flag.Parse()
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u, err := url.Parse(upstream)
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if err != nil {
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return fmt.Errorf("invalid upstream address: %v", err)
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}
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rp := httputil.NewSingleHostReverseProxy(u)
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srv := http.Server{
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Handler: rp,
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Addr: addr,
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}
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idleConnsClosed := make(chan struct{})
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go func() {
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sig := make(chan os.Signal, 1)
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signal.Notify(sig, os.Interrupt, syscall.SIGTERM)
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fmt.Println(<-sig)
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// We received an interrupt signal, shut down.
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if err := srv.Shutdown(context.Background()); err != nil {
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// Error from closing listeners, or context timeout:
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fmt.Printf("HTTP server Shutdown: %v", err)
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}
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close(idleConnsClosed)
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}()
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if err := srv.ListenAndServeTLS(certFile, keyFile); err != http.ErrServerClosed {
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// Error starting or closing listener:
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return fmt.Errorf("ListenAndServeTLS: %v", err)
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}
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<-idleConnsClosed
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return nil
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}
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func main() {
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err := _main()
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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}
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