mirror of
https://github.com/stapelberg/router7.git
synced 2025-09-27 03:15:53 +08:00
123 lines
2.7 KiB
Go
123 lines
2.7 KiB
Go
// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Binary backupd provides tarballs of /perm.
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package main
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import (
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"context"
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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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"syscall"
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"github.com/gokrazy/gokrazy"
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"github.com/gokrazy/rsync/rsyncd"
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"github.com/rtr7/router7/internal/backup"
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"github.com/rtr7/router7/internal/multilisten"
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"github.com/rtr7/router7/internal/teelogger"
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)
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var log = teelogger.NewConsole()
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var httpListeners = multilisten.NewPool()
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var rsyncListeners = multilisten.NewPool()
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type rsyncListener struct {
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addr string
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listener net.Listener
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cancel context.CancelFunc
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}
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func (r *rsyncListener) ListenAndServe() error {
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ln, err := net.Listen("tcp", r.addr)
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if err != nil {
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return err
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}
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r.listener = ln
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ctx, cancel := context.WithCancel(context.Background())
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r.cancel = cancel
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rsyncServer, err := rsyncd.NewServer([]rsyncd.Module{
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{
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Name: "perm",
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Path: "/perm",
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},
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})
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if err != nil {
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return err
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}
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go func() {
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if err := rsyncServer.Serve(ctx, ln); err != nil {
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log.Print(err)
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}
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}()
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return nil
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}
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func (r *rsyncListener) Close() error {
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if r.cancel != nil {
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r.cancel()
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r.cancel = nil
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r.listener.Close()
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r.listener = nil
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}
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return nil
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}
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func updateListeners() error {
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hosts, err := gokrazy.PrivateInterfaceAddrs()
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if err != nil {
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return err
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}
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httpListeners.ListenAndServe(hosts, func(host string) multilisten.Listener {
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return &http.Server{Addr: net.JoinHostPort(host, "8077")}
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})
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rsyncListeners.ListenAndServe(hosts, func(host string) multilisten.Listener {
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return &rsyncListener{addr: net.JoinHostPort(host, "8873")} // unprivileged rsync
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})
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return nil
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}
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func logic() error {
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http.HandleFunc("/backup.tar.gz", func(w http.ResponseWriter, r *http.Request) {
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if err := backup.Archive(w, "/perm"); err != nil {
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log.Printf("backup.tar.gz: %v", err)
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http.Error(w, err.Error(), http.StatusInternalServerError)
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}
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})
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updateListeners()
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ch := make(chan os.Signal, 1)
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signal.Notify(ch, syscall.SIGUSR1)
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for range ch {
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if err := updateListeners(); err != nil {
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log.Printf("updateListeners: %v", err)
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}
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}
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return nil
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}
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func main() {
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if err := logic(); err != nil {
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log.Fatal(err)
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}
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}
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