Add HTTP handler registration to the HTTP server

tests/standalone/src/io/HttpServerHandlerTest.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+//
+
+#import("dart:io");
+#import("dart:isolate");
+
+class Handler1 implements RequestHandler {
+  void onRequest(HttpRequest request, HttpResponse response) {
+    response.outputStream.writeString("Handler 1");
+    response.outputStream.close();
+  }
+}
+
+class Handler2 implements RequestHandler {
+  void onRequest(HttpRequest request, HttpResponse response) {
+    response.outputStream.writeString("Handler 2");
+    response.outputStream.close();
+  }
+}
+
+class French404Handler implements RequestHandler {
+  void onRequest(HttpRequest request, HttpResponse response) {
+    response.statusCode = HttpStatus.NOT_FOUND;
+    response.reasonPhrase = "Non Trouvé";
+    response.outputStream.close();
+  }
+}
+
+class Server {
+  Server() {
+    server = new HttpServer();
+    server.listen("127.0.0.1", 0);
+    port = server.port;
+    server.onError = (e) {
+      Expect.fail("No server errors expected: $e");
+    };
+  }
+
+  void addHandler(Function matcher, handler) {
+    server.addRequestHandler(matcher, handler);
+  }
+
+  void set defaultHandler(handler) {
+    server.defaultRequestHandler = handler;
+  }
+
+  void close() {
+    server.close();
+  }
+
+  int port;
+  HttpServer server;
+}
+
+void testDefaultHandler() {
+  Server server = new Server();
+  HttpClient client = new HttpClient();
+
+  void done() {
+    server.close();
+    client.shutdown();
+  }
+
+  void error(e) {
+    Expect.fail("No client error expected $e");
+    done();
+  };
+
+  void german404(HttpRequest request, HttpResponse response) {
+    response.statusCode = HttpStatus.NOT_FOUND;
+    response.reasonPhrase = "Nicht Gefunden";
+    response.outputStream.close();
+  }
+
+  // Test the standard default handler.
+  HttpClientConnection conn = client.get("127.0.0.1", server.port, "/");
+  conn.onResponse = (HttpClientResponse response) {
+    Expect.equals(HttpStatus.NOT_FOUND, response.statusCode);
+    Expect.equals("Not Found", response.reasonPhrase);
+
+    // Install a default handler.
+    server.defaultHandler = german404;
+    HttpClientConnection conn = client.get("127.0.0.1", server.port, "/");
+    conn.onResponse = (HttpClientResponse response) {
+      Expect.equals(HttpStatus.NOT_FOUND, response.statusCode);
+      Expect.equals("Nicht Gefunden", response.reasonPhrase);
+
+      // Install another default handler.
+      server.defaultHandler = new French404Handler();
+      HttpClientConnection conn = client.get("127.0.0.1", server.port, "/");
+      conn.onResponse = (HttpClientResponse response) {
+        Expect.equals(HttpStatus.NOT_FOUND, response.statusCode);
+        Expect.equals("Non Trouvé", response.reasonPhrase);
+        done();
+      };
+      conn.onError = error;
+    };
+    conn.onError = error;
+  };
+  conn.onError = error;
+}
+
+void testHandlers() {
+  Server server = new Server();
+  HttpClient client = new HttpClient();
+  int requests = 0;
+  int doneCount = 0;
+
+  void done() {
+    doneCount++;
+    if (doneCount == requests) {
+      server.close();
+      client.shutdown();
+    }
+  }
+
+  void error(e) {
+    Expect.fail("No client error expected $e");
+    done();
+  };
+
+  void handler3(HttpRequest request, HttpResponse response) {
+    response.statusCode = HttpStatus.OK;
+    response.outputStream.writeString("Handler 3");
+    response.outputStream.close();
+  }
+
+  void handler4(HttpRequest request, HttpResponse response) {
+    response.statusCode = HttpStatus.OK;
+    response.outputStream.writeString("Handler 4");
+    response.outputStream.close();
+  }
+
+  void checkBody(HttpClientResponse response, String expected) {
+    StringBuffer sb = new StringBuffer();
+    StringInputStream stream = new StringInputStream(response.inputStream);
+    stream.onData = () {
+      sb.add(stream.read());
+    };
+    stream.onClosed = () {
+      Expect.equals(expected, sb.toString());
+      done();
+    };
+  }
+
+  server.addHandler(
+      (request) => request.path.startsWith("/xxx/yyy/"), new Handler1());
+  server.addHandler(
+      (request) => new RegExp("^/xxx").hasMatch(request.path), new Handler2());
+  server.addHandler(
+      (request) => request.path == "/yyy.dat", handler3);
+  server.addHandler(
+      (request) => request.path.endsWith(".dat"), handler4);
+
+  void testRequest(String path, int expectedStatus, String expectedBody) {
+    HttpClientConnection conn =
+        client.get("127.0.0.1", server.port, path);
+    requests++;
+    conn.onResponse = (HttpClientResponse response) {
+      Expect.equals(expectedStatus, response.statusCode);
+      checkBody(response, expectedBody);
+    };
+    conn.onError = error;
+  }
+
+  testRequest("/xxx/yyy/zzz", HttpStatus.OK, "Handler 1");
+  testRequest("/xxx/zzz", HttpStatus.OK, "Handler 2");
+  testRequest("/yyy.dat", HttpStatus.OK, "Handler 3");
+  testRequest("/abc.dat", HttpStatus.OK, "Handler 4");
+  testRequest("/abcdat", HttpStatus.NOT_FOUND, "");
+  testRequest("/xxx.dat", HttpStatus.OK, "Handler 2");
+}
+
+main() {
+  testDefaultHandler();
+  testHandlers();
+}