Added a check for malformed headers

Server_test.go

@@ -136,6 +136,26 @@ func TestBadRequestProtocol(t *testing.T) {
 	s.Run(":8080")
 }
 
+func TestConnectionClose(t *testing.T) {
+	s := web.NewServer()
+
+	go func() {
+		defer syscall.Kill(syscall.Getpid(), syscall.SIGTERM)
+
+		conn, err := net.Dial("tcp", ":8080")
+		assert.Nil(t, err)
+		defer conn.Close()
+
+		_, err = io.WriteString(conn, "GET / HTTP/1.1\r\nConnection: close\r\n\r\n")
+		assert.Nil(t, err)
+
+		_, err = io.ReadAll(conn)
+		assert.Nil(t, err)
+	}()
+
+	s.Run(":8080")
+}
+
 func TestEarlyClose(t *testing.T) {
 	s := web.NewServer()