HTTP server with WebSockets.

server/internal/services/core/httpserver.go

@@ -2,6 +2,7 @@ package core
 
 import (
 	"errors"
+	"net/http"
 )
 
 // ServiceNameHTTPServer is a name for HTTP server service.
@@ -11,6 +12,12 @@ const ServiceNameHTTPServer = "core/http_server"
 var ErrHTTPServerIsInvalid = errors.New("HTTP server service implementation is invalid")
 
 // HTTPServer is an interface for HTTP server service.
-//
-//nolint:iface
-type HTTPServer interface{}
+type HTTPServer interface {
+	// RegisterHandler registers HTTP handler.
+	RegisterHandler(method, path string, handler http.HandlerFunc)
+	// RegisterMiddleware registers HTTP server middlewares.
+	RegisterMiddleware(middleware HTTPMiddlewareFunc)
+}
+
+// HTTPMiddlewareFunc is a function that acts as middleware for HTTP requests.
+type HTTPMiddlewareFunc func(fn http.HandlerFunc) http.HandlerFunc

server/internal/services/core/httpserver/default_handler.go

@@ -0,0 +1,8 @@
+package httpserver
+
+import "net/http"
+
+func (h *httpServer) defaultHandler(w http.ResponseWriter, _ *http.Request) {
+	w.WriteHeader(http.StatusNotFound)
+	_, _ = w.Write([]byte("Unknown path."))
+}

server/internal/services/core/httpserver/httpserver.go

@@ -21,6 +21,9 @@ type httpServer struct {
 	logger  *slog.Logger
 	db      core.Database
 	httpSrv *http.Server
+	httpMux *http.ServeMux
+
+	middlewares []core.HTTPMiddlewareFunc
 }
 
 // Initialize initializes service.
@@ -67,6 +70,10 @@ func (h *httpServer) Initialize() error {
 
 	h.logger.Info("Initializing...")
 
+	h.middlewares = make([]core.HTTPMiddlewareFunc, 0)
+
+	h.RegisterMiddleware(h.requestLoggingMiddleware)
+
 	return nil
 }
 

server/internal/services/core/httpserver/request_logger.go

@@ -0,0 +1,24 @@
+package httpserver
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func (h *httpServer) requestLoggingMiddleware(fn http.HandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		startTime := time.Now()
+
+		fn(w, r)
+
+		h.logger.Info(
+			"HTTP request.",
+			"remote_addr", r.RemoteAddr,
+			"user_agent", r.UserAgent(),
+			"host", r.Host,
+			"path", fmt.Sprintf("%s %s", r.Method, r.RequestURI),
+			"duration", time.Since(startTime),
+		)
+	}
+}

server/internal/services/core/httpserver/server.go

@@ -9,6 +9,8 @@ import (
 	"os"
 	"time"
 
+	"bunker/server/internal/services/core"
+
 	"github.com/coder/websocket"
 )
 
@@ -35,12 +37,15 @@ func (h *httpServer) configureHTTPServer() error {
 		return fmt.Errorf("configure HTTP server: validate HTTP server address: %w", errHTTPServerAddrInvalid)
 	}
 
-	mux := new(http.ServeMux)
-	mux.HandleFunc("GET /api/v1/socket", h.handleWebsocketRequest)
+	h.httpMux = new(http.ServeMux)
+
+	// Default catch-all handler.
+	h.RegisterHandler("", "/", h.defaultHandler)
+	h.RegisterHandler(http.MethodGet, "/api/v1/socket", h.handleWebsocketRequest)
 
 	h.httpSrv = &http.Server{
 		Addr:              httpSrvAddr,
-		Handler:           mux,
+		Handler:           h.httpMux,
 		ReadHeaderTimeout: time.Second * 3,
 	}
 
@@ -66,6 +71,20 @@ func (h *httpServer) handleWebsocketRequest(w http.ResponseWriter, r *http.Reque
 	}()
 }
 
+func (h *httpServer) RegisterHandler(method, path string, handler http.HandlerFunc) {
+	h.httpMux.HandleFunc(fmt.Sprintf("%s %s", method, path), func(w http.ResponseWriter, r *http.Request) {
+		for i := len(h.middlewares) - 1; i >= 0; i-- {
+			handler = h.middlewares[i](handler)
+		}
+
+		handler(w, r)
+	})
+}
+
+func (h *httpServer) RegisterMiddleware(middleware core.HTTPMiddlewareFunc) {
+	h.middlewares = append(h.middlewares, middleware)
+}
+
 func (h *httpServer) startHTTPServer() {
 	h.logger.Info("Starting listening for HTTP requests.", "address", h.httpSrv.Addr)
 

server/internal/services/core/options.go

@@ -11,6 +11,4 @@ const ServiceNameOptions = "core/options"
 var ErrOptionsIsInvalid = errors.New("options service implementation is invalid")
 
 // Options is an interface for options service.
-//
-//nolint:iface
 type Options interface{}