28e2075280
trunk/talk git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d
215 lines
7.6 KiB
C++
215 lines
7.6 KiB
C++
/*
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* libjingle
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* Copyright 2011, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "talk/xmpp/pubsubtasks.h"
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#include <string>
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#include <vector>
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#include "talk/xmpp/constants.h"
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#include "talk/xmpp/receivetask.h"
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// An implementation of the tasks for XEP-0060
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// (http://xmpp.org/extensions/xep-0060.html).
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namespace buzz {
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namespace {
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bool IsPubSubEventItemsElem(const XmlElement* stanza,
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const std::string& expected_node) {
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if (stanza->Name() != QN_MESSAGE) {
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return false;
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}
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const XmlElement* event_elem = stanza->FirstNamed(QN_PUBSUB_EVENT);
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if (event_elem == NULL) {
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return false;
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}
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const XmlElement* items_elem = event_elem->FirstNamed(QN_PUBSUB_EVENT_ITEMS);
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if (items_elem == NULL) {
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return false;
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}
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const std::string& actual_node = items_elem->Attr(QN_NODE);
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return (actual_node == expected_node);
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}
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// Creates <pubsub node="node"><items></pubsub>
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XmlElement* CreatePubSubItemsElem(const std::string& node) {
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XmlElement* items_elem = new XmlElement(QN_PUBSUB_ITEMS, false);
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items_elem->AddAttr(QN_NODE, node);
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XmlElement* pubsub_elem = new XmlElement(QN_PUBSUB, false);
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pubsub_elem->AddElement(items_elem);
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return pubsub_elem;
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}
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// Creates <pubsub node="node"><publish><item id="itemid">payload</item>...
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// Takes ownership of payload.
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XmlElement* CreatePubSubPublishItemElem(
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const std::string& node,
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const std::string& itemid,
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const std::vector<XmlElement*>& children) {
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XmlElement* pubsub_elem = new XmlElement(QN_PUBSUB, true);
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XmlElement* publish_elem = new XmlElement(QN_PUBSUB_PUBLISH, false);
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publish_elem->AddAttr(QN_NODE, node);
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XmlElement* item_elem = new XmlElement(QN_PUBSUB_ITEM, false);
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item_elem->AddAttr(QN_ID, itemid);
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for (std::vector<XmlElement*>::const_iterator child = children.begin();
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child != children.end(); ++child) {
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item_elem->AddElement(*child);
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}
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publish_elem->AddElement(item_elem);
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pubsub_elem->AddElement(publish_elem);
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return pubsub_elem;
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}
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// Creates <pubsub node="node"><publish><item id="itemid">payload</item>...
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// Takes ownership of payload.
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XmlElement* CreatePubSubRetractItemElem(const std::string& node,
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const std::string& itemid) {
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XmlElement* pubsub_elem = new XmlElement(QN_PUBSUB, true);
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XmlElement* retract_elem = new XmlElement(QN_PUBSUB_RETRACT, false);
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retract_elem->AddAttr(QN_NODE, node);
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retract_elem->AddAttr(QN_NOTIFY, "true");
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XmlElement* item_elem = new XmlElement(QN_PUBSUB_ITEM, false);
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item_elem->AddAttr(QN_ID, itemid);
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retract_elem->AddElement(item_elem);
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pubsub_elem->AddElement(retract_elem);
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return pubsub_elem;
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}
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void ParseItem(const XmlElement* item_elem,
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std::vector<PubSubItem>* items) {
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PubSubItem item;
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item.itemid = item_elem->Attr(QN_ID);
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item.elem = item_elem;
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items->push_back(item);
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}
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// Right now, <retract>s are treated the same as items with empty
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// payloads. We may want to change it in the future, but right now
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// it's sufficient for our needs.
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void ParseRetract(const XmlElement* retract_elem,
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std::vector<PubSubItem>* items) {
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ParseItem(retract_elem, items);
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}
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void ParseEventItemsElem(const XmlElement* stanza,
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std::vector<PubSubItem>* items) {
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const XmlElement* event_elem = stanza->FirstNamed(QN_PUBSUB_EVENT);
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if (event_elem != NULL) {
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const XmlElement* items_elem =
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event_elem->FirstNamed(QN_PUBSUB_EVENT_ITEMS);
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if (items_elem != NULL) {
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for (const XmlElement* item_elem =
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items_elem->FirstNamed(QN_PUBSUB_EVENT_ITEM);
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item_elem != NULL;
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item_elem = item_elem->NextNamed(QN_PUBSUB_EVENT_ITEM)) {
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ParseItem(item_elem, items);
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}
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for (const XmlElement* retract_elem =
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items_elem->FirstNamed(QN_PUBSUB_EVENT_RETRACT);
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retract_elem != NULL;
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retract_elem = retract_elem->NextNamed(QN_PUBSUB_EVENT_RETRACT)) {
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ParseRetract(retract_elem, items);
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}
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}
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}
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}
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void ParsePubSubItemsElem(const XmlElement* stanza,
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std::vector<PubSubItem>* items) {
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const XmlElement* pubsub_elem = stanza->FirstNamed(QN_PUBSUB);
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if (pubsub_elem != NULL) {
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const XmlElement* items_elem = pubsub_elem->FirstNamed(QN_PUBSUB_ITEMS);
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if (items_elem != NULL) {
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for (const XmlElement* item_elem = items_elem->FirstNamed(QN_PUBSUB_ITEM);
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item_elem != NULL;
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item_elem = item_elem->NextNamed(QN_PUBSUB_ITEM)) {
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ParseItem(item_elem, items);
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}
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}
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}
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}
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} // namespace
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PubSubRequestTask::PubSubRequestTask(XmppTaskParentInterface* parent,
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const Jid& pubsubjid,
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const std::string& node)
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: IqTask(parent, STR_GET, pubsubjid, CreatePubSubItemsElem(node)) {
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}
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void PubSubRequestTask::HandleResult(const XmlElement* stanza) {
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std::vector<PubSubItem> items;
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ParsePubSubItemsElem(stanza, &items);
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SignalResult(this, items);
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}
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bool PubSubReceiveTask::WantsStanza(const XmlElement* stanza) {
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return MatchStanzaFrom(stanza, pubsubjid_) &&
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IsPubSubEventItemsElem(stanza, node_);
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}
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void PubSubReceiveTask::ReceiveStanza(const XmlElement* stanza) {
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std::vector<PubSubItem> items;
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ParseEventItemsElem(stanza, &items);
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SignalUpdate(this, items);
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}
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PubSubPublishTask::PubSubPublishTask(XmppTaskParentInterface* parent,
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const Jid& pubsubjid,
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const std::string& node,
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const std::string& itemid,
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const std::vector<XmlElement*>& children)
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: IqTask(parent, STR_SET, pubsubjid,
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CreatePubSubPublishItemElem(node, itemid, children)),
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itemid_(itemid) {
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}
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void PubSubPublishTask::HandleResult(const XmlElement* stanza) {
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SignalResult(this);
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}
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PubSubRetractTask::PubSubRetractTask(XmppTaskParentInterface* parent,
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const Jid& pubsubjid,
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const std::string& node,
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const std::string& itemid)
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: IqTask(parent, STR_SET, pubsubjid,
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CreatePubSubRetractItemElem(node, itemid)),
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itemid_(itemid) {
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}
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void PubSubRetractTask::HandleResult(const XmlElement* stanza) {
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SignalResult(this);
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}
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} // namespace buzz
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