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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef REMOTING_JINGLE_GLUE_IQ_SENDER_H_ | |
| 6 #define REMOTING_JINGLE_GLUE_IQ_SENDER_H_ | |
| 7 | |
| 8 #include <map> | |
| 9 #include <string> | |
| 10 | |
| 11 #include "base/callback.h" | |
| 12 #include "base/compiler_specific.h" | |
| 13 #include "base/gtest_prod_util.h" | |
| 14 #include "base/memory/scoped_ptr.h" | |
| 15 #include "base/memory/weak_ptr.h" | |
| 16 #include "remoting/jingle_glue/signal_strategy.h" | |
| 17 | |
| 18 namespace base { | |
| 19 class TimeDelta; | |
| 20 } // namespace base | |
| 21 | |
| 22 namespace buzz { | |
| 23 class XmlElement; | |
| 24 } // namespace buzz | |
| 25 | |
| 26 namespace remoting { | |
| 27 | |
| 28 class IqRequest; | |
| 29 class SignalStrategy; | |
| 30 | |
| 31 // IqSender handles sending iq requests and routing of responses to | |
| 32 // those requests. | |
| 33 class IqSender : public SignalStrategy::Listener { | |
| 34 public: | |
| 35 // Callback that is called when an Iq response is received. Called | |
| 36 // with the |response| set to NULL in case of a timeout. | |
| 37 typedef base::Callback<void(IqRequest* request, | |
| 38 const buzz::XmlElement* response)> ReplyCallback; | |
| 39 | |
| 40 explicit IqSender(SignalStrategy* signal_strategy); | |
| 41 virtual ~IqSender(); | |
| 42 | |
| 43 // Send an iq stanza. Returns an IqRequest object that represends | |
| 44 // the request. |callback| is called when response to |stanza| is | |
| 45 // received. Destroy the returned IqRequest to cancel the callback. | |
| 46 // Caller must take ownership of the result. Result must be | |
| 47 // destroyed before sender is destroyed. | |
| 48 scoped_ptr<IqRequest> SendIq(scoped_ptr<buzz::XmlElement> stanza, | |
| 49 const ReplyCallback& callback); | |
| 50 | |
| 51 // Same as above, but also formats the message. | |
| 52 scoped_ptr<IqRequest> SendIq(const std::string& type, | |
| 53 const std::string& addressee, | |
| 54 scoped_ptr<buzz::XmlElement> iq_body, | |
| 55 const ReplyCallback& callback); | |
| 56 | |
| 57 // SignalStrategy::Listener implementation. | |
| 58 virtual void OnSignalStrategyStateChange( | |
| 59 SignalStrategy::State state) OVERRIDE; | |
| 60 virtual bool OnSignalStrategyIncomingStanza( | |
| 61 const buzz::XmlElement* stanza) OVERRIDE; | |
| 62 | |
| 63 private: | |
| 64 typedef std::map<std::string, IqRequest*> IqRequestMap; | |
| 65 friend class IqRequest; | |
| 66 | |
| 67 // Helper function used to create iq stanzas. | |
| 68 static scoped_ptr<buzz::XmlElement> MakeIqStanza( | |
| 69 const std::string& type, | |
| 70 const std::string& addressee, | |
| 71 scoped_ptr<buzz::XmlElement> iq_body); | |
| 72 | |
| 73 // Removes |request| from the list of pending requests. Called by IqRequest. | |
| 74 void RemoveRequest(IqRequest* request); | |
| 75 | |
| 76 SignalStrategy* signal_strategy_; | |
| 77 IqRequestMap requests_; | |
| 78 | |
| 79 DISALLOW_COPY_AND_ASSIGN(IqSender); | |
| 80 }; | |
| 81 | |
| 82 // This call must only be used on the thread it was created on. | |
| 83 class IqRequest : public base::SupportsWeakPtr<IqRequest> { | |
| 84 public: | |
| 85 IqRequest(IqSender* sender, const IqSender::ReplyCallback& callback, | |
| 86 const std::string& addressee); | |
| 87 ~IqRequest(); | |
| 88 | |
| 89 // Sets timeout for the request. When the timeout expires the | |
| 90 // callback is called with the |response| set to NULL. | |
| 91 void SetTimeout(base::TimeDelta timeout); | |
| 92 | |
| 93 private: | |
| 94 friend class IqSender; | |
| 95 | |
| 96 void CallCallback(const buzz::XmlElement* stanza); | |
| 97 void OnTimeout(); | |
| 98 | |
| 99 // Called by IqSender when a response is received. | |
| 100 void OnResponse(const buzz::XmlElement* stanza); | |
| 101 | |
| 102 void DeliverResponse(scoped_ptr<buzz::XmlElement> stanza); | |
| 103 | |
| 104 IqSender* sender_; | |
| 105 IqSender::ReplyCallback callback_; | |
| 106 std::string addressee_; | |
| 107 | |
| 108 DISALLOW_COPY_AND_ASSIGN(IqRequest); | |
| 109 }; | |
| 110 | |
| 111 } // namespace remoting | |
| 112 | |
| 113 #endif // REMOTING_JINGLE_GLUE_IQ_SENDER_H_ | |
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