add gost routine

cmd/gost/main.go

+package main
+
+import (
+	"crypto/tls"
+	"flag"
+	"fmt"
+	"github.com/ginuerzh/gost"
+	"github.com/golang/glog"
+	"golang.org/x/net/http2"
+	"os"
+	"runtime"
+	"sync"
+)
+
+var (
+	chainNodes  stringlist
+	serverNodes stringlist
+	pv          bool
+)
+
+func init() {
+	flag.Var(&serverNodes, "L", "listen address, can listen on multiple ports")
+	flag.Var(&chainNodes, "F", "forward address, can make a forward chain")
+	flag.BoolVar(&pv, "V", false, "print version")
+	flag.Parse()
+
+	if glog.V(5) {
+		http2.VerboseLogs = true
+	}
+}
+
+func main() {
+	if flag.NFlag() == 0 {
+		flag.PrintDefaults()
+		return
+	}
+	if pv {
+		fmt.Fprintf(os.Stderr, "gost %s (%s)\n", gost.Version, runtime.Version())
+		return
+	}
+
+	chain := gost.NewProxyChain()
+	if err := chain.AddProxyNodeString(chainNodes...); err != nil {
+		glog.Fatal(err)
+	}
+	// enable HTTP2
+	chain.TryEnableHttp2()
+
+	var wg sync.WaitGroup
+	for _, ns := range serverNodes {
+		serverNode, err := gost.ParseProxyNode(ns)
+		if err != nil {
+			glog.Fatal(err)
+		}
+
+		wg.Add(1)
+		go func(node gost.ProxyNode) {
+			defer wg.Done()
+			certFile, keyFile := node.Get("cert"), node.Get("key")
+			if certFile == "" {
+				certFile = gost.DefaultCertFile
+			}
+			if keyFile == "" {
+				keyFile = gost.DefaultKeyFile
+			}
+			cert, err := gost.LoadCertificate(certFile, keyFile)
+			if err != nil {
+				glog.Fatal(err)
+			}
+			server := gost.NewProxyServer(node, chain, &tls.Config{Certificates: []tls.Certificate{cert}})
+			glog.Fatal(server.Serve())
+		}(serverNode)
+	}
+	wg.Wait()
+}
+
+type stringlist []string
+
+func (list *stringlist) String() string {
+	return fmt.Sprintf("%s", *list)
+}
+func (list *stringlist) Set(value string) error {
+	*list = append(*list, value)
+	return nil
+}