Don't raise on WS route not found

spec/websocket_handler_spec.cr

@@ -1,6 +1,19 @@
 require "./spec_helper"
 
 describe "Kemal::WebSocketHandler" do
+  it "doesn't match on wrong route" do
+    handler = Kemal::WebSocketHandler.new "/" { }
+    headers = HTTP::Headers{
+      "Upgrade"           => "websocket",
+      "Connection"        => "Upgrade",
+      "Sec-WebSocket-Key" => "dGhlIHNhbXBsZSBub25jZQ==",
+    }
+    request = HTTP::Request.new("GET", "/asd", headers)
+    io_with_context = create_request_and_return_io(handler, request)
+    client_response = HTTP::Client::Response.from_io(io_with_context, decompress: false)
+    client_response.status_code.should eq(404)
+  end
+
   it "matches on given route" do
     handler = Kemal::WebSocketHandler.new "/" { }
     headers = HTTP::Headers{

src/kemal/ext/context.cr

@@ -13,12 +13,13 @@ class HTTP::Server
     end
 
     def params
-      websocket? = @request.headers.has_key?("Upgrade")
-      @request.url_params ||= unless websocket?
+      connection_type = @request.headers.fetch("Connection", nil)
+      @request.url_params ||= unless connection_type == "Upgrade"
                                 route_lookup.params
                               else
                                 ws_route_lookup.params
                               end
+
       @params ||= if @request.param_parser
                     @request.param_parser.not_nil!
                   else

src/kemal/websocket_handler.cr

@@ -8,7 +8,7 @@ module Kemal
     end
 
     def call(context)
-      raise Kemal::Exceptions::RouteNotFound.new(context) unless context.ws_route_defined?
+      return call_next(context) unless context.ws_route_defined?
       super
     end
   end