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main.go
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main.go
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package main
import (
"context"
"fmt"
"os"
"os/signal"
"syscall"
"time"
_ "time/tzdata"
"github.com/qdm12/gosettings/reader"
"github.com/qdm12/gosettings/reader/sources/env"
"github.com/qdm12/gosplash"
"github.com/qdm12/log"
"github.com/qdm12/ss-server/internal/config"
"github.com/qdm12/ss-server/internal/profiling"
"github.com/qdm12/ss-server/pkg/tcpudp"
)
//nolint:gochecknoglobals
var (
version = "unknown"
date = "unknown"
commit = "unknown"
)
func main() {
buildInfo := BuildInformation{
Version: version,
Commit: commit,
Date: date,
}
background := context.Background()
signalCh := make(chan os.Signal, 1)
signal.Notify(signalCh, os.Interrupt, syscall.SIGTERM)
ctx, cancel := context.WithCancel(background)
logger := log.New()
envReader := env.New(env.Settings{})
reader := reader.New(reader.Settings{Sources: []reader.Source{envReader}})
errorCh := make(chan error)
go func() {
errorCh <- _main(ctx, buildInfo, logger, reader)
}()
var err error
select {
case signal := <-signalCh:
fmt.Println("")
logger.Warn("Caught OS signal " + signal.String() + ", shutting down")
cancel()
case err = <-errorCh:
close(errorCh)
if err == nil { // expected exit such as healthcheck
os.Exit(0)
}
logger.Error(err.Error())
cancel()
}
const shutdownGracePeriod = 5 * time.Second
timer := time.NewTimer(shutdownGracePeriod)
select {
case shutdownErr := <-errorCh:
if !timer.Stop() {
<-timer.C
}
if shutdownErr != nil {
logger.Warnf("Shutdown not completed gracefully: %s", shutdownErr)
os.Exit(1)
}
logger.Info("Shutdown successful")
if err != nil {
os.Exit(1)
}
os.Exit(0)
case <-timer.C:
logger.Warn("Shutdown timed out")
os.Exit(1)
case signal := <-signalCh:
logger.Warn("Caught OS signal " + signal.String() + ", forcing shut down")
os.Exit(1)
}
}
func _main(ctx context.Context, buildInfo BuildInformation,
logger Logger, configReader *reader.Reader) error {
splashSettings := gosplash.Settings{
User: "qdm12",
Repository: "ss-server",
Emails: []string{"quentin.mcgaw@gmail.com"},
Version: buildInfo.Version,
Commit: buildInfo.Commit,
BuildDate: buildInfo.Date,
// Sponsor information
PaypalUser: "qmcgaw",
GithubSponsor: "qdm12",
}
for _, line := range gosplash.MakeLines(splashSettings) {
fmt.Println(line)
}
var settings config.Settings
err := settings.Read(configReader)
if err != nil {
return fmt.Errorf("reading settings: %w", err)
}
settings.SetDefaults()
err = settings.Validate()
if err != nil {
return fmt.Errorf("validating settings: %w", err)
}
logLevel, _ := log.ParseLevel(settings.LogLevel)
logger.Patch(log.SetLevel(logLevel))
logger.Info(settings.String())
serverSettings := tcpudp.Settings{
Address: settings.Address,
CipherName: settings.CipherName,
Password: settings.Password,
}
server, err := tcpudp.NewServer(serverSettings, logger)
if err != nil {
return err
}
if *settings.Profiling {
logger.Info("profiling server listening on :6060")
onShutdownError := func(err error) { logger.Error(err.Error()) }
profileServer := profiling.NewServer(onShutdownError)
go func() {
if err := profileServer.Run(ctx); err != nil {
logger.Error(err.Error())
}
}()
}
return server.Listen(ctx)
}
type Logger interface {
Debug(s string)
Info(s string)
Error(s string)
log.LoggerPatcher
}
type BuildInformation struct {
Version string
Commit string
Date string
}