unfork DDC's copy of most SDK libraries

pkg/dev_compiler/tool/input_sdk/lib/io/http_session.dart

Index: pkg/dev_compiler/tool/input_sdk/lib/io/http_session.dart
diff --git a/pkg/dev_compiler/tool/input_sdk/lib/io/http_session.dart b/pkg/dev_compiler/tool/input_sdk/lib/io/http_session.dart
deleted file mode 100644
index 90075a5377d7a0efeb87bb39eefa482ed405faf3..0000000000000000000000000000000000000000
--- a/pkg/dev_compiler/tool/input_sdk/lib/io/http_session.dart
+++ /dev/null
@@ -1,174 +0,0 @@
-// Copyright (c) 2013, 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.
-
-part of dart.io;
-
-const String _DART_SESSION_ID = "DARTSESSID";
-
-// A _HttpSession is a node in a double-linked list, with _next and _prev being
-// the previous and next pointers.
-class _HttpSession implements HttpSession {
-  // Destroyed marked. Used by the http connection to see if a session is valid.
-  bool _destroyed = false;
-  bool _isNew = true;
-  DateTime _lastSeen;
-  Function _timeoutCallback;
-  _HttpSessionManager _sessionManager;
-  // Pointers in timeout queue.
-  _HttpSession _prev;
-  _HttpSession _next;
-  final String id;
-
-  final Map _data = new HashMap();
-
-  _HttpSession(this._sessionManager, this.id) : _lastSeen = new DateTime.now();
-
-  void destroy() {
-    _destroyed = true;
-    _sessionManager._removeFromTimeoutQueue(this);
-    _sessionManager._sessions.remove(id);
-  }
-
-  // Mark the session as seen. This will reset the timeout and move the node to
-  // the end of the timeout queue.
-  void _markSeen() {
-    _lastSeen = new DateTime.now();
-    _sessionManager._bumpToEnd(this);
-  }
-
-  DateTime get lastSeen => _lastSeen;
-
-  bool get isNew => _isNew;
-
-  void set onTimeout(void callback()) {
-    _timeoutCallback = callback;
-  }
-
-  // Map implementation:
-  bool containsValue(value) => _data.containsValue(value);
-  bool containsKey(key) => _data.containsKey(key);
-  operator [](key) => _data[key];
-  void operator []=(key, value) { _data[key] = value; }
-  putIfAbsent(key, ifAbsent) => _data.putIfAbsent(key, ifAbsent);
-  addAll(Map other) => _data.addAll(other);
-  remove(key) => _data.remove(key);
-  void clear() { _data.clear(); }
-  void forEach(void f(key, value)) { _data.forEach(f); }
-  Iterable get keys => _data.keys;
-  Iterable get values => _data.values;
-  int get length => _data.length;
-  bool get isEmpty => _data.isEmpty;
-  bool get isNotEmpty => _data.isNotEmpty;
-
-  String toString() => 'HttpSession id:$id $_data';
-}
-
-// Private class used to manage all the active sessions. The sessions are stored
-// in two ways:
-//
-//  * In a map, mapping from ID to HttpSession.
-//  * In a linked list, used as a timeout queue.
-class _HttpSessionManager {
-  Map<String, _HttpSession> _sessions;
-  int _sessionTimeout = 20 * 60;  // 20 mins.
-  _HttpSession _head;
-  _HttpSession _tail;
-  Timer _timer;
-
-  _HttpSessionManager() : _sessions = {};
-
-  String createSessionId() {
-    const int _KEY_LENGTH = 16;  // 128 bits.
-    var data = _IOCrypto.getRandomBytes(_KEY_LENGTH);
-    return _CryptoUtils.bytesToHex(data);
-  }
-
-  _HttpSession getSession(String id) => _sessions[id];
-
-  _HttpSession createSession() {
-    var id = createSessionId();
-    // TODO(ajohnsen): Consider adding a limit and throwing an exception.
-    // Should be very unlikely however.
-    while (_sessions.containsKey(id)) {
-      id = createSessionId();
-    }
-    var session = _sessions[id] = new _HttpSession(this, id);
-    _addToTimeoutQueue(session);
-    return session;
-  }
-
-  void set sessionTimeout(int timeout) {
-    _sessionTimeout = timeout;
-    _stopTimer();
-    _startTimer();
-  }
-
-  void close() { _stopTimer(); }
-
-  void _bumpToEnd(_HttpSession session) {
-    _removeFromTimeoutQueue(session);
-    _addToTimeoutQueue(session);
-  }
-
-  void _addToTimeoutQueue(_HttpSession session) {
-    if (_head == null) {
-      assert(_tail == null);
-      _tail = _head = session;
-      _startTimer();
-    } else {
-      assert(_timer != null);
-      assert(_tail != null);
-      // Add to end.
-      _tail._next = session;
-      session._prev = _tail;
-      _tail = session;
-    }
-  }
-
-  void _removeFromTimeoutQueue(_HttpSession session) {
-    if (session._next != null) {
-      session._next._prev = session._prev;
-    }
-    if (session._prev != null) {
-      session._prev._next = session._next;
-    }
-    if (_head == session) {
-      // We removed the head element, start new timer.
-      _head = session._next;
-      _stopTimer();
-      _startTimer();
-    }
-    if (_tail == session) {
-      _tail = session._prev;
-    }
-    session._next = session._prev = null;
-  }
-
-  void _timerTimeout() {
-    _stopTimer();  // Clear timer.
-    assert(_head != null);
-    var session = _head;
-    session.destroy();  // Will remove the session from timeout queue and map.
-    if (session._timeoutCallback != null) {
-      session._timeoutCallback();
-    }
-  }
-
-  void _startTimer() {
-    assert(_timer == null);
-    if (_head != null) {
-      int seconds = new DateTime.now().difference(_head.lastSeen).inSeconds;
-      _timer = new Timer(new Duration(seconds: _sessionTimeout - seconds),
-                         _timerTimeout);
-    }
-  }
-
-  void _stopTimer() {
-    if (_timer != null) {
-      _timer.cancel();
-      _timer = null;
-    }
-  }
-}
-