feat: notify document updates over websocket

apps/server/internal/httpserver/middleware.go

@@ -1,10 +1,28 @@
 package httpserver
 
 import (
+	"bufio"
+	"fmt"
+	"net"
 	"net/http"
 	"time"
+
+	"github.com/go-chi/chi/v5/middleware"
 )
 
+func (s *Server) timeoutExceptWebSocket(timeout time.Duration) func(http.Handler) http.Handler {
+	timeoutMiddleware := middleware.Timeout(timeout)
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if r.URL.Path == "/ws" {
+				next.ServeHTTP(w, r)
+				return
+			}
+			timeoutMiddleware(next).ServeHTTP(w, r)
+		})
+	}
+}
+
 func (s *Server) requestLogger(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		ww := &statusWriter{ResponseWriter: w, status: http.StatusOK}
@@ -21,7 +39,7 @@ func (s *Server) requestLogger(next http.Handler) http.Handler {
 
 func (s *Server) securityHeaders(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Security-Policy", "default-src 'self'; base-uri 'self'; frame-ancestors 'none'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self'; connect-src 'self'; object-src 'none'")
+		w.Header().Set("Content-Security-Policy", "default-src 'self'; base-uri 'self'; frame-ancestors 'none'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self'; connect-src 'self' ws: wss:; object-src 'none'")
 		w.Header().Set("Referrer-Policy", "strict-origin-when-cross-origin")
 		w.Header().Set("X-Content-Type-Options", "nosniff")
 		w.Header().Set("X-Frame-Options", "DENY")
@@ -40,3 +58,11 @@ func (w *statusWriter) WriteHeader(status int) {
 	w.status = status
 	w.ResponseWriter.WriteHeader(status)
 }
+
+func (w *statusWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	hijacker, ok := w.ResponseWriter.(http.Hijacker)
+	if !ok {
+		return nil, nil, fmt.Errorf("response writer does not support hijacking")
+	}
+	return hijacker.Hijack()
+}