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package main
import (
"flag"
"log"
"math/rand"
"net/http"
"os"
"os/signal"
"time"
)
func main() {
// Set up flags
log.Println("Setting up components")
registerHTTPFlags()
registerSessionFlags()
registerCredentialsFlags()
registerSeedFlags()
registerAccessFlags()
registerLimitFlags()
flag.Parse()
// Read challenges from file
log.Println("Reading seed file")
readChallengesError := getChallengesFromSeedFile()
if readChallengesError != nil {
log.Fatalln(readChallengesError.Error())
}
// Seed the random number generator
log.Println("Seed random number generator")
rand.Seed(time.Now().UTC().UnixNano())
// Start our VPN container and network
log.Printf("Starting VPN container ('%s')", vpnContainerName)
startVPNError := startVPN()
if startVPNError != nil {
log.Fatalln(startVPNError.Error())
}
// Launch Limiter
log.Printf("Starting limiter (end %d, timespan %d)", *endTimestamp, *endAfter)
startLimitTimer()
// Set up HTTP server
log.Printf("Running HTTP server on port %d", *port)
httpServer := setupHTTPServer()
// React to system signals
signalChannel := make(chan os.Signal, 1)
signal.Notify(signalChannel)
go cleanup(signalChannel, httpServer)
// Start our HTTP server
log.Fatalln(httpServer.ListenAndServe())
}
func cleanup(signalChannel chan os.Signal, server http.Server) {
// Block until we receive a signal
<- signalChannel
log.Println("Requested shutdown")
// Stop everything
log.Println("Stopping HTTP server")
server.Close()
log.Println("Stopping VPN container")
stopVPN()
log.Println("Stopping challenge containers")
stopAllChallengeContainers()
log.Println("Deleting Docker networks")
deleteNetwork(getVPNNetworkName())
deleteNetwork(getChallengeNetworkName())
os.Exit(0)
}
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