Add sessions to HttpServer.

tests/standalone/io/http_session_test.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");
+
+const SESSION_ID = "DARTSESSID";
+
+String getSessionId(List<Cookie> cookies) {
+  var id = cookies.reduce(null, (last, cookie) {
+    if (last != null) return last;
+    if (cookie.name.toUpperCase() == SESSION_ID) {
+      return cookie.value;
+    }
+    return null;
+  });
+  Expect.isNotNull(id);
+  return id;
+}
+
+Future<String> connectGetSession(int port, [String session]) {
+  var c = new Completer();
+  var client = new HttpClient();
+  var conn = client.get("127.0.0.1", port, "/");
+  conn.onRequest = (request) {
+    if (session != null) {
+      request.cookies.add(new Cookie(SESSION_ID, session));
+    }
+    request.outputStream.close();
+  };
+  conn.onResponse = (response) {
+    client.shutdown();
+    c.complete(getSessionId(response.cookies));
+  };
+  return c.future;
+}
+
+void testSessions(int sessionCount) {
+  HttpServer server = new HttpServer();
+  server.listen("127.0.0.1", 0);
+  var sessions = new Set();
+  server.defaultRequestHandler = (request, response) {
+    sessions.add(request.session().id);
+    response.outputStream.close();
+  };
+
+  var futures = [];
+  for (int i = 0; i < sessionCount; i++) {
+    futures.add(connectGetSession(server.port).chain((session) {
+      Expect.isNotNull(session);
+      Expect.isTrue(sessions.contains(session));
+      return connectGetSession(server.port, session).transform((session2) {
+        Expect.equals(session2, session);
+        Expect.isTrue(sessions.contains(session2));
+        return session2;
+        });
+    }));
+  }
+  Futures.wait(futures).then((clientSessions) {
+    Expect.equals(sessions.length, sessionCount);
+    Expect.setEquals(new Set.from(clientSessions), sessions);
+    server.close();
+  });
+}
+
+void testTimeout(int sessionCount) {
+  HttpServer server = new HttpServer();
+  server.sessionTimeout = 0;
+  server.listen("127.0.0.1", 0);
+  var timeouts = [];
+  server.defaultRequestHandler = (request, response) {
+    var c = new Completer();
+    timeouts.add(c.future);
+    request.session().onTimeout = () {
+      c.complete(null);
+    };
+    response.outputStream.close();
+  };
+
+  var futures = [];
+  for (int i = 0; i < sessionCount; i++) {
+    futures.add(connectGetSession(server.port));
+  }
+  Futures.wait(futures).then((clientSessions) {
+    Futures.wait(timeouts).then((_) {
+      futures = [];
+      for (var id in clientSessions) {
+        futures.add(connectGetSession(server.port, id).transform((session) {
+          Expect.isNotNull(session);
+          Expect.notEquals(id, session);
+        }));
+      }
+      Futures.wait(futures).then((_) {
+        server.close();
+      });
+    });
+  });
+}
+
+void main() {
+  testSessions(5);
+  testTimeout(5);
+}