Limit simultaneous clients amount

[gocheese.git] / gocheese.go

diff --git a/gocheese.go b/gocheese.go
index 7a6d9ffc85ab9e8d54f99386e30e3b2e6304e743..26c2c27ba74673cda10e03eb6b44e31ee924920f 100644 (file)
--- a/gocheese.go
+++ b/gocheese.go
@@ -1,6 +1,7 @@
 /*
 GoCheese -- Python private package repository and caching proxy
 Copyright (C) 2019 Sergey Matveev <stargrave@stargrave.org>
+              2019 Elena Balakhonova <balakhonova_e@riseup.net>
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -28,6 +29,7 @@ import (
        "io"
        "io/ioutil"
        "log"
+       "net"
        "net/http"
        "net/url"
        "os"
@@ -38,6 +40,8 @@ import (
        "strings"
        "syscall"
        "time"
+
+       "golang.org/x/net/netutil"
 )
 
 const (
@@ -70,6 +74,7 @@ var (
        passwdPath       = flag.String("passwd", "passwd", "Path to file with authenticators")
        passwdCheck      = flag.Bool("passwd-check", false, "Test the -passwd file for syntax errors and exit")
        fsck             = flag.Bool("fsck", false, "Check integrity of all packages")
+       maxClients       = flag.Int("maxclients", 128, "Maximal amount of simultaneous clients")
        version          = flag.Bool("version", false, "Print version information")
        warranty         = flag.Bool("warranty", false, "Print warranty information")
 
@@ -447,10 +452,13 @@ func main() {
        killed := make(chan error, 0)
        http.HandleFunc(*norefreshURLPath, handler)
        http.HandleFunc(*refreshURLPath, handler)
+       ln, err := net.Listen("tcp", *bind)
+       if err != nil {
+               log.Fatal(err)
+       }
        s := &http.Server{
-               Addr:           *bind,
-               ReadTimeout:    time.Minute,
-               WriteTimeout:   time.Minute,
+               ReadTimeout:  time.Minute,
+               WriteTimeout: time.Minute,
        }
        signal.Notify(needsRefreshPasswd, syscall.SIGHUP)
        signal.Notify(needsShutdown, syscall.SIGTERM, syscall.SIGINT)
@@ -467,7 +475,7 @@ func main() {
                killed <- s.Shutdown(ctx)
                cancel()
        }(s)
-       if err := s.ListenAndServe(); err != http.ErrServerClosed {
+       if err := s.Serve(netutil.LimitListener(ln, *maxClients)); err != http.ErrServerClosed {
                log.Fatal(err)
        }
        if err := <-killed; err != nil {