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- // Copyright 2014 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_SIGNALING_IQ_SENDER_H_
- #define REMOTING_SIGNALING_IQ_SENDER_H_
- #include <map>
- #include <memory>
- #include <string>
- #include "base/callback.h"
- #include "base/compiler_specific.h"
- #include "base/memory/raw_ptr.h"
- #include "base/memory/weak_ptr.h"
- #include "remoting/signaling/signal_strategy.h"
- namespace base {
- class TimeDelta;
- } // namespace base
- namespace jingle_xmpp {
- class XmlElement;
- } // namespace jingle_xmpp
- namespace remoting {
- class IqRequest;
- class SignalStrategy;
- // IqSender handles sending iq requests and routing of responses to
- // those requests.
- class IqSender : public SignalStrategy::Listener {
- public:
- // Callback that is called when an Iq response is received. Called
- // with the |response| set to nullptr in case of a timeout.
- using ReplyCallback =
- base::OnceCallback<void(IqRequest* request,
- const jingle_xmpp::XmlElement* response)>;
- explicit IqSender(SignalStrategy* signal_strategy);
- IqSender(const IqSender&) = delete;
- IqSender& operator=(const IqSender&) = delete;
- ~IqSender() override;
- // Send an iq stanza. Returns an IqRequest object that represends
- // the request. |callback| is called when response to |stanza| is
- // received. Destroy the returned IqRequest to cancel the callback.
- // Caller must take ownership of the result. Result must be
- // destroyed before sender is destroyed.
- std::unique_ptr<IqRequest> SendIq(
- std::unique_ptr<jingle_xmpp::XmlElement> stanza,
- ReplyCallback callback);
- // Same as above, but also formats the message.
- std::unique_ptr<IqRequest> SendIq(
- const std::string& type,
- const std::string& addressee,
- std::unique_ptr<jingle_xmpp::XmlElement> iq_body,
- ReplyCallback callback);
- // SignalStrategy::Listener implementation.
- void OnSignalStrategyStateChange(SignalStrategy::State state) override;
- bool OnSignalStrategyIncomingStanza(const jingle_xmpp::XmlElement* stanza) override;
- private:
- typedef std::map<std::string, IqRequest*> IqRequestMap;
- friend class IqRequest;
- // Helper function used to create iq stanzas.
- static std::unique_ptr<jingle_xmpp::XmlElement> MakeIqStanza(
- const std::string& type,
- const std::string& addressee,
- std::unique_ptr<jingle_xmpp::XmlElement> iq_body);
- // Removes |request| from the list of pending requests. Called by IqRequest.
- void RemoveRequest(IqRequest* request);
- raw_ptr<SignalStrategy> signal_strategy_;
- IqRequestMap requests_;
- };
- // This call must only be used on the thread it was created on.
- class IqRequest {
- public:
- IqRequest(IqSender* sender,
- IqSender::ReplyCallback callback,
- const std::string& addressee);
- IqRequest(const IqRequest&) = delete;
- IqRequest& operator=(const IqRequest&) = delete;
- ~IqRequest();
- // Sets timeout for the request. When the timeout expires the
- // callback is called with the |response| set to nullptr.
- void SetTimeout(base::TimeDelta timeout);
- private:
- friend class IqSender;
- void CallCallback(const jingle_xmpp::XmlElement* stanza);
- void OnTimeout();
- // Called by IqSender when a response is received.
- void OnResponse(const jingle_xmpp::XmlElement* stanza);
- void DeliverResponse(std::unique_ptr<jingle_xmpp::XmlElement> stanza);
- raw_ptr<IqSender> sender_;
- IqSender::ReplyCallback callback_;
- std::string addressee_;
- base::WeakPtrFactory<IqRequest> weak_factory_{this};
- };
- } // namespace remoting
- #endif // REMOTING_SIGNALING_IQ_SENDER_H_
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