905c241daa
- Fix metrics: change MessagesTotal, ConnectionsTotal, DisconnectionsTotal from Gauge to Counter with proper _total naming convention - Fix broadcast write-error handling: failed clients now get properly removed with accurate metrics updates - Add graceful shutdown: SIGINT/SIGTERM handling with 10s timeout, CloseGoingAway frame sent to clients before disconnect - Add integration tests: 11 tests using real WebSocket connections covering connect, broadcast, disconnect, concurrency, and shutdown - Fix example client port: changed from 8000 to 8443 to match config - Rewrite README.md to reflect current features and usage - Add AGENTS.md and .agents/summary/ documentation for AI assistants
101 lines
2.5 KiB
Go
101 lines
2.5 KiB
Go
package main
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import (
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"context"
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"flag"
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"fmt"
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"log"
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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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"time"
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"websocket-relay/internal/config"
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"websocket-relay/internal/hub"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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func main() {
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configFile := flag.String("config-file", "config.yaml", "Path to configuration file")
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flag.Parse()
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cfg, err := config.Load(*configFile)
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if err != nil {
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log.Fatal("Failed to load config:", err)
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}
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h := hub.New()
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go h.Run()
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// Start metrics server if enabled
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var metricsServer *http.Server
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if cfg.Metrics.Enabled {
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metricsMux := http.NewServeMux()
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metricsMux.Handle("/metrics", promhttp.Handler())
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metricsAddr := fmt.Sprintf(":%d", cfg.Metrics.Port)
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metricsServer = &http.Server{
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Addr: metricsAddr,
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Handler: metricsMux,
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}
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go func() {
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log.Printf("Metrics server starting on %s", metricsAddr)
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if err := metricsServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
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log.Printf("Metrics server error: %v", err)
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}
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}()
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}
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mux := http.NewServeMux()
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mux.HandleFunc("/", h.HandleWebSocket)
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addr := fmt.Sprintf(":%d", cfg.Server.Port)
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server := &http.Server{
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Addr: addr,
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Handler: mux,
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}
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// Start the main server in a goroutine
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go func() {
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if cfg.Server.TLS.Enabled {
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log.Printf("WebSocket relay server starting on %s (TLS)", addr)
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if err := server.ListenAndServeTLS(cfg.Server.TLS.CertFile, cfg.Server.TLS.KeyFile); err != nil && err != http.ErrServerClosed {
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log.Fatalf("Server error: %v", err)
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}
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} else {
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log.Printf("WebSocket relay server starting on %s (HTTP)", addr)
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if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
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log.Fatalf("Server error: %v", err)
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}
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}
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}()
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// Wait for interrupt signal
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quit := make(chan os.Signal, 1)
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signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
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sig := <-quit
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log.Printf("Received signal %v, shutting down gracefully...", sig)
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// Create a deadline for the shutdown
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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// Shut down the main HTTP server (stops accepting new connections)
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if err := server.Shutdown(ctx); err != nil {
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log.Printf("HTTP server shutdown error: %v", err)
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}
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// Shut down the metrics server
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if metricsServer != nil {
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if err := metricsServer.Shutdown(ctx); err != nil {
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log.Printf("Metrics server shutdown error: %v", err)
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}
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}
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// Stop the hub and close all WebSocket connections
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h.Shutdown()
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log.Printf("Server stopped")
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}
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