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main.go
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main.go
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// Copyright 2023 Jigsaw Operations LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"context"
"flag"
"log"
"net"
"net/http"
"os"
"os/signal"
"time"
"github.com/Jigsaw-Code/outline-sdk/x/config"
"github.com/Jigsaw-Code/outline-sdk/x/httpproxy"
)
func main() {
transportFlag := flag.String("transport", "", "Transport config")
addrFlag := flag.String("localAddr", "localhost:1080", "Local proxy address")
urlProxyPrefixFlag := flag.String("urlProxyPrefix", "/proxy", "Path where to run the URL proxy. Set to empty (\"\") to disable it.")
flag.Parse()
dialer, err := config.NewDefaultConfigToDialer().NewStreamDialer(*transportFlag)
if err != nil {
log.Fatalf("Could not create dialer: %v", err)
}
listener, err := net.Listen("tcp", *addrFlag)
if err != nil {
log.Fatalf("Could not listen on address %v: %v", *addrFlag, err)
}
defer listener.Close()
log.Printf("Proxy listening on %v", listener.Addr().String())
proxyHandler := httpproxy.NewProxyHandler(dialer)
if *urlProxyPrefixFlag != "" {
proxyHandler.FallbackHandler = http.StripPrefix(*urlProxyPrefixFlag, httpproxy.NewPathHandler(dialer))
}
server := http.Server{Handler: proxyHandler}
go func() {
if err := server.Serve(listener); err != nil && err != http.ErrServerClosed {
log.Fatalf("Error running web server: %v", err)
}
}()
// Wait for interrupt signal to stop the proxy.
sig := make(chan os.Signal, 1)
signal.Notify(sig, os.Interrupt)
<-sig
log.Print("Shutting down")
// Gracefully shut down the server, with a 5s timeout.
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
if err := server.Shutdown(ctx); err != nil {
log.Fatalf("Failed to shutdown gracefully: %v", err)
}
}