Copy the (early prototype of) remoting in Chrome into the public tree....

remoting/jingle_glue/iq_request.h

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef REMOTING_JINGLE_GLUE_IQ_REQUEST_H_
+#define REMOTING_JINGLE_GLUE_IQ_REQUEST_H_
+
+#include <string>
+
+#include "base/callback.h"
+#include "talk/xmpp/xmppengine.h"
+#include "testing/gtest/include/gtest/gtest_prod.h"
+
+namespace remoting {
+
+class JingleClient;
+
+// IqRequest class can be used to send an IQ stanza and then receive reply
+// stanza for that request. It sends outgoing stanza when SendIq() is called,
+// after that it forwards incoming reply stanza to the callback set with
+// set_callback(). If multiple IQ stanzas are send with SendIq() then only reply
+// to the last one will be received.
+// The class must be used on the jingle thread only.
+// TODO(sergeyu): Implement unittests for this class.
+class IqRequest : private buzz::XmppIqHandler {
+ public:
+  typedef Callback1<const buzz::XmlElement*>::Type ReplyCallback;
+
+  explicit IqRequest(JingleClient* jingle_client);
+  virtual ~IqRequest();
+
+  // Sends stanza of type |type| to |addressee|. |iq_body| contains body of
+  // the stanza. Ownership of |iq_body| is transfered to IqRequest. Must
+  // be called on the jingle thread.
+  void SendIq(const std::string& type, const std::string& addressee,
+              buzz::XmlElement* iq_body);
+
+  // Sets callback that is called when reply stanza is received. Callback
+  // is called on the jingle thread.
+  void set_callback(ReplyCallback* callback) {
+    callback_.reset(callback);
+  }
+
+ private:
+  FRIEND_TEST(IqRequestTest, MakeIqStanza);
+
+  // XmppIqHandler interface.
+  virtual void IqResponse(buzz::XmppIqCookie cookie,
+                          const buzz::XmlElement* stanza);
+
+  static buzz::XmlElement* MakeIqStanza(const std::string& type,
+                                        const std::string& addressee,
+                                        buzz::XmlElement* iq_body,
+                                        const std::string& id);
+
+  void Unregister();
+
+  scoped_refptr<JingleClient> jingle_client_;
+  buzz::XmppIqCookie cookie_;
+  scoped_ptr<ReplyCallback> callback_;
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_JINGLE_GLUE_IQ_REQUEST_H_