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

remoting/jingle_glue/iq_request.cc

+// 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.
+
+#include "remoting/jingle_glue/iq_request.h"
+
+#include "base/logging.h"
+#include "base/message_loop.h"
+#include "base/scoped_ptr.h"
+#include "remoting/jingle_glue/jingle_client.h"
+#include "talk/xmpp/constants.h"
+#include "talk/xmpp/xmppengine.h"
+
+namespace remoting {
+
+IqRequest::IqRequest(JingleClient* jingle_client)
+    : jingle_client_(jingle_client),
+      cookie_(NULL) {
+  DCHECK(jingle_client_ != NULL);
+  DCHECK(MessageLoop::current() == jingle_client_->message_loop());
+}
+
+IqRequest::~IqRequest() {
+  DCHECK(MessageLoop::current() == jingle_client_->message_loop());
+  Unregister();
+}
+
+void IqRequest::SendIq(const std::string& type,
+                       const std::string& addressee,
+                       buzz::XmlElement* iq_body) {
+  DCHECK(MessageLoop::current() == jingle_client_->message_loop());
+
+  // Unregister the handler if it is already registered.
+  Unregister();
+
+  DCHECK(type.length() > 0);
+  DCHECK(addressee.length() > 0);
+
+  buzz::XmppClient* xmpp_client = jingle_client_->xmpp_client();
+  DCHECK(xmpp_client);  // Expect that connection is active.
+
+  scoped_ptr<buzz::XmlElement> stanza(MakeIqStanza(type, addressee, iq_body,
+                                                   xmpp_client->NextId()));
+
+  xmpp_client->engine()->SendIq(stanza.get(), this, &cookie_);
+}
+
+// static
+buzz::XmlElement* IqRequest::MakeIqStanza(const std::string& type,
+                                          const std::string& addressee,
+                                          buzz::XmlElement* iq_body,
+                                          const std::string& id) {
+  buzz::XmlElement* stanza = new buzz::XmlElement(buzz::QN_IQ);
+  stanza->AddAttr(buzz::QN_TYPE, type);
+  stanza->AddAttr(buzz::QN_TO, addressee);
+  stanza->AddAttr(buzz::QN_ID, id);
+  stanza->AddElement(iq_body);
+  return stanza;
+}
+
+void IqRequest::Unregister() {
+  if (cookie_) {
+    buzz::XmppClient* xmpp_client = jingle_client_->xmpp_client();
+    // No need to unregister the handler if the client has been destroyed.
+    if (xmpp_client) {
+      xmpp_client->engine()->RemoveIqHandler(cookie_, NULL);
+    }
+    cookie_ = NULL;
+  }
+}
+
+void IqRequest::IqResponse(buzz::XmppIqCookie cookie,
+                           const buzz::XmlElement* stanza) {
+  if (callback_.get() != NULL) {
+    callback_->Run(stanza);
+  }
+}
+
+}  // namespace remoting