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      1 /*
      2  * libjingle
      3  * Copyright 2011, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/xmpp/iqtask.h"
     29 
     30 #include "talk/xmpp/xmppclient.h"
     31 #include "talk/xmpp/constants.h"
     32 
     33 namespace buzz {
     34 
     35 static const int kDefaultIqTimeoutSecs = 15;
     36 
     37 IqTask::IqTask(XmppTaskParentInterface* parent,
     38                const std::string& verb,
     39                const buzz::Jid& to,
     40                buzz::XmlElement* el)
     41     : buzz::XmppTask(parent, buzz::XmppEngine::HL_SINGLE),
     42       to_(to),
     43       stanza_(MakeIq(verb, to_, task_id())) {
     44   stanza_->AddElement(el);
     45   set_timeout_seconds(kDefaultIqTimeoutSecs);
     46 }
     47 
     48 int IqTask::ProcessStart() {
     49   buzz::XmppReturnStatus ret = SendStanza(stanza_.get());
     50   // TODO: HandleError(NULL) if SendStanza fails?
     51   return (ret == buzz::XMPP_RETURN_OK) ? STATE_RESPONSE : STATE_ERROR;
     52 }
     53 
     54 bool IqTask::HandleStanza(const buzz::XmlElement* stanza) {
     55   if (!MatchResponseIq(stanza, to_, task_id()))
     56     return false;
     57 
     58   if (stanza->Attr(buzz::QN_TYPE) != buzz::STR_RESULT &&
     59       stanza->Attr(buzz::QN_TYPE) != buzz::STR_ERROR) {
     60     return false;
     61   }
     62 
     63   QueueStanza(stanza);
     64   return true;
     65 }
     66 
     67 int IqTask::ProcessResponse() {
     68   const buzz::XmlElement* stanza = NextStanza();
     69   if (stanza == NULL)
     70     return STATE_BLOCKED;
     71 
     72   bool success = (stanza->Attr(buzz::QN_TYPE) == buzz::STR_RESULT);
     73   if (success) {
     74     HandleResult(stanza);
     75   } else {
     76     SignalError(this, stanza->FirstNamed(QN_ERROR));
     77   }
     78   return STATE_DONE;
     79 }
     80 
     81 int IqTask::OnTimeout() {
     82   SignalError(this, NULL);
     83   return XmppTask::OnTimeout();
     84 }
     85 
     86 }  // namespace buzz
     87