fix(urlMatcher): normalize URLs to align with Node.js parser behavior (#1734)

Author: mxschmitt

playwright/src/main/java/com/microsoft/playwright/impl/UrlMatcher.java

@@ -21,6 +21,7 @@
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
+import java.util.Arrays;
 import java.util.function.Predicate;
 import java.util.regex.Pattern;
 
@@ -65,6 +66,21 @@ private static String resolveUrl(String baseUrl, String spec) {
     }
   }
 
+  private static String normaliseUrl(String spec) {
+    try {
+      // Align with the Node.js URL parser which automatically adds a slash to the path if it is empty.
+      URI url = new URI(spec);
+      if (url.getScheme() != null &&
+        Arrays.asList("http", "https", "ws", "wss").contains(url.getScheme()) &&
+        url.getPath().isEmpty()) {
+        return new URI(url.getScheme(), url.getAuthority(), "/", url.getQuery(), url.getFragment()).toString();
+      }
+      return url.toString();
+    } catch (URISyntaxException e) {
+      return spec;
+    }
+  }
+
   UrlMatcher(URL baseURL, String glob) {
     this(baseURL, glob, null, null);
   }
@@ -101,7 +117,7 @@ private static boolean testImpl(String baseURL, Pattern pattern, Predicate<Strin
         if (baseURL != null && Pattern.compile("^https?://").matcher(baseURL).find() && Pattern.compile("^wss?://").matcher(value).find()) {
           baseURL = baseURL.replaceFirst("^http", "ws");
         }
-        glob = resolveUrl(baseURL, glob);
+        glob = normaliseUrl(resolveUrl(baseURL, glob));
       }
       return Pattern.compile(globToRegex(glob)).matcher(value).find();
     }

playwright/src/test/java/com/microsoft/playwright/TestRouteWebSocket.java

@@ -9,6 +9,8 @@
 
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
 import java.util.regex.Pattern;
@@ -349,4 +351,44 @@ public void shouldWorkWithBaseURL(Browser browser) throws Exception {
       asList("open", "message: data=echo origin=ws://localhost:" + webSocketServer.getPort() + " lastEventId="),
       newPage.evaluate("window.log"));
   }
+
+  @Test
+  public void shouldWorkWithNoTrailingSlash(Page page) throws Exception {  
+    List<String> log = new ArrayList<>();
+
+    // No trailing slash in the route pattern
+    page.routeWebSocket("ws://localhost:" + webSocketServer.getPort(), ws -> {
+      ws.onMessage(message -> {
+        log.add(message.text());
+        ws.send("response");
+      });
+    });
+
+    page.navigate("about:blank");
+    page.evaluate("({ port }) => {\n" +
+      "    window.log = [];\n" +
+      "    // No trailing slash in WebSocket URL\n" +
+      "    window.ws = new WebSocket('ws://localhost:' + port);\n" +
+      "    window.ws.addEventListener('message', event => window.log.push(event.data));\n" +
+      "}", mapOf("port", webSocketServer.getPort()));
+
+    // Wait for WebSocket to be ready (readyState === 1)
+    page.waitForCondition(() -> {
+      Integer result = (Integer) page.evaluate("() => window.ws.readyState");
+      return result == 1;
+    });
+
+    page.evaluate("() => window.ws.send('query')");
+
+    // Wait and verify server received message
+    page.waitForCondition(() -> log.size() >= 1);
+    assertEquals(asList("query"), log);
+
+    // Wait and verify client received response 
+    page.waitForCondition(() -> {
+      Boolean result = (Boolean) page.evaluate("() => window.log.length >= 1");
+      return result;
+    });
+    assertEquals(asList("response"), page.evaluate("window.log"));
+  }
 }