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main.go
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main.go
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package main
import (
"encoding/json"
"log"
"os"
"os/signal"
"path/filepath"
"strings"
"github.com/delving-co/loophost/loopproxy/reverseproxy"
"github.com/fsnotify/fsnotify"
"github.com/gorilla/mux"
)
var path = os.Args[1]
func check(e error) {
if e != nil {
panic(e)
}
}
type Loopdata struct {
Apps map[string]string `json:"apps"`
Fqdn string `json:"fqdn"`
Tunnel string `json:"tunnel"`
}
func loadRoutes(r *reverseproxy.ReverseProxy) {
log.Println("Loading routes from json")
r.ClearTargets()
dat, err := os.ReadFile(filepath.FromSlash(path + "/loophost.json"))
check(err)
var defn Loopdata
err = json.Unmarshal(dat, &defn)
check(err)
domains := []string{defn.Fqdn, defn.Tunnel}
for k := range defn.Apps {
for _, subdomain := range domains {
a := mux.NewRouter()
host := k + "." + subdomain
log.Println(host)
log.Println(defn.Apps[k])
a.Host(host)
r.AddTarget([]string{defn.Apps[k]}, a)
}
}
// Handle anything else
r.AddTarget([]string{"http://127.0.0.1:5816"}, nil)
}
func main() {
f, err := os.OpenFile(filepath.FromSlash(path + "../loophost-goproxy.log"), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
log.Fatalf("error opening file: %v", err)
}
defer f.Close()
log.SetOutput(f)
log.Println("Starting loophost proxy")
dat, err := os.ReadFile(filepath.FromSlash(path + "/loophost.json"))
check(err)
var defn Loopdata
err = json.Unmarshal(dat, &defn)
check(err)
// Create new watcher.
watcher, err := fsnotify.NewWatcher()
if err != nil {
log.Fatal(err)
}
defer watcher.Close()
c := make(chan os.Signal, 1)
// We'll accept graceful shutdowns when quit via SIGINT (Ctrl+C)
// SIGKILL, SIGQUIT or SIGTERM (Ctrl+/) will not be caught.
signal.Notify(c, os.Interrupt)
hup := make(chan int)
// Start listening for events.
go func() {
log.Println("In goroutine adding listeners...")
r := &reverseproxy.ReverseProxy{}
// Listen for http://
// r.AddListener(":80")
// Listen for https://
r.AddListenerTLS(":443",
path+"/live/"+defn.Fqdn+"/fullchain.pem",
path+"/live/"+defn.Fqdn+"/privkey.pem")
r.AddListenerTLS(":4433",
path+"/live/"+defn.Fqdn+"/fullchain.pem",
path+"/live/"+defn.Fqdn+"/privkey.pem")
if err := r.Start(); err != nil {
log.Fatal(err)
}
serving:
for {
select {
case sig := <-hup:
log.Println("Received HUP")
if sig == 0 {
loadRoutes(r)
} else {
break serving
}
case event, ok := <-watcher.Events:
if !ok {
return
}
if event.Has(fsnotify.Write) {
if strings.HasSuffix(event.Name, "json") {
log.Println("modified file:", event.Name)
go func() { hup <- 0 }()
}
}
case err, ok := <-watcher.Errors:
if !ok {
break serving
}
log.Println("error:", err)
break serving
}
}
// Graceful shutdown
r.Stop()
}()
// Add a path.
err = watcher.Add(filepath.FromSlash(path))
if err != nil {
log.Fatal(err)
}
hup <- 0
// Block until we receive our signal.
<-c
hup <- 1
}