862 lines
36 KiB
Java
862 lines
36 KiB
Java
/**
|
|
*
|
|
* Copyright 2003-2007 Jive Software.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
package org.jivesoftware.smackx.disco;
|
|
|
|
import org.jivesoftware.smack.SmackException.NoResponseException;
|
|
import org.jivesoftware.smack.SmackException.NotConnectedException;
|
|
import org.jivesoftware.smack.XMPPConnection;
|
|
import org.jivesoftware.smack.ConnectionCreationListener;
|
|
import org.jivesoftware.smack.Manager;
|
|
import org.jivesoftware.smack.XMPPConnectionRegistry;
|
|
import org.jivesoftware.smack.XMPPException.XMPPErrorException;
|
|
import org.jivesoftware.smack.iqrequest.AbstractIqRequestHandler;
|
|
import org.jivesoftware.smack.iqrequest.IQRequestHandler.Mode;
|
|
import org.jivesoftware.smack.packet.IQ;
|
|
import org.jivesoftware.smack.packet.Stanza;
|
|
import org.jivesoftware.smack.packet.ExtensionElement;
|
|
import org.jivesoftware.smack.packet.XMPPError;
|
|
import org.jivesoftware.smack.util.Objects;
|
|
import org.jivesoftware.smackx.caps.EntityCapsManager;
|
|
import org.jivesoftware.smackx.disco.packet.DiscoverInfo;
|
|
import org.jivesoftware.smackx.disco.packet.DiscoverItems;
|
|
import org.jivesoftware.smackx.disco.packet.DiscoverInfo.Identity;
|
|
import org.jivesoftware.smackx.xdata.packet.DataForm;
|
|
import org.jxmpp.jid.DomainBareJid;
|
|
import org.jxmpp.jid.Jid;
|
|
import org.jxmpp.util.cache.Cache;
|
|
import org.jxmpp.util.cache.ExpirationCache;
|
|
|
|
import java.util.ArrayList;
|
|
import java.util.Arrays;
|
|
import java.util.Collection;
|
|
import java.util.Collections;
|
|
import java.util.HashSet;
|
|
import java.util.LinkedList;
|
|
import java.util.List;
|
|
import java.util.Map;
|
|
import java.util.Set;
|
|
import java.util.WeakHashMap;
|
|
import java.util.concurrent.ConcurrentHashMap;
|
|
import java.util.logging.Level;
|
|
import java.util.logging.Logger;
|
|
|
|
/**
|
|
* Manages discovery of services in XMPP entities. This class provides:
|
|
* <ol>
|
|
* <li>A registry of supported features in this XMPP entity.
|
|
* <li>Automatic response when this XMPP entity is queried for information.
|
|
* <li>Ability to discover items and information of remote XMPP entities.
|
|
* <li>Ability to publish publicly available items.
|
|
* </ol>
|
|
*
|
|
* @author Gaston Dombiak
|
|
*/
|
|
public final class ServiceDiscoveryManager extends Manager {
|
|
|
|
private static final Logger LOGGER = Logger.getLogger(ServiceDiscoveryManager.class.getName());
|
|
|
|
private static final String DEFAULT_IDENTITY_NAME = "Smack";
|
|
private static final String DEFAULT_IDENTITY_CATEGORY = "client";
|
|
private static final String DEFAULT_IDENTITY_TYPE = "pc";
|
|
|
|
private static DiscoverInfo.Identity defaultIdentity = new Identity(DEFAULT_IDENTITY_CATEGORY,
|
|
DEFAULT_IDENTITY_NAME, DEFAULT_IDENTITY_TYPE);
|
|
|
|
private Set<DiscoverInfo.Identity> identities = new HashSet<DiscoverInfo.Identity>();
|
|
private DiscoverInfo.Identity identity = defaultIdentity;
|
|
|
|
private EntityCapsManager capsManager;
|
|
|
|
private static Map<XMPPConnection, ServiceDiscoveryManager> instances = new WeakHashMap<>();
|
|
|
|
private final Set<String> features = new HashSet<String>();
|
|
private DataForm extendedInfo = null;
|
|
private Map<String, NodeInformationProvider> nodeInformationProviders =
|
|
new ConcurrentHashMap<String, NodeInformationProvider>();
|
|
|
|
// Create a new ServiceDiscoveryManager on every established connection
|
|
static {
|
|
XMPPConnectionRegistry.addConnectionCreationListener(new ConnectionCreationListener() {
|
|
@Override
|
|
public void connectionCreated(XMPPConnection connection) {
|
|
getInstanceFor(connection);
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Set the default identity all new connections will have. If unchanged the default identity is an
|
|
* identity where category is set to 'client', type is set to 'pc' and name is set to 'Smack'.
|
|
*
|
|
* @param identity
|
|
*/
|
|
public static void setDefaultIdentity(DiscoverInfo.Identity identity) {
|
|
defaultIdentity = identity;
|
|
}
|
|
|
|
/**
|
|
* Creates a new ServiceDiscoveryManager for a given XMPPConnection. This means that the
|
|
* service manager will respond to any service discovery request that the connection may
|
|
* receive.
|
|
*
|
|
* @param connection the connection to which a ServiceDiscoveryManager is going to be created.
|
|
*/
|
|
private ServiceDiscoveryManager(XMPPConnection connection) {
|
|
super(connection);
|
|
|
|
addFeature(DiscoverInfo.NAMESPACE);
|
|
addFeature(DiscoverItems.NAMESPACE);
|
|
|
|
// Listen for disco#items requests and answer with an empty result
|
|
connection.registerIQRequestHandler(new AbstractIqRequestHandler(DiscoverItems.ELEMENT, DiscoverItems.NAMESPACE, IQ.Type.get, Mode.async) {
|
|
@Override
|
|
public IQ handleIQRequest(IQ iqRequest) {
|
|
DiscoverItems discoverItems = (DiscoverItems) iqRequest;
|
|
DiscoverItems response = new DiscoverItems();
|
|
response.setType(IQ.Type.result);
|
|
response.setTo(discoverItems.getFrom());
|
|
response.setStanzaId(discoverItems.getStanzaId());
|
|
response.setNode(discoverItems.getNode());
|
|
|
|
// Add the defined items related to the requested node. Look for
|
|
// the NodeInformationProvider associated with the requested node.
|
|
NodeInformationProvider nodeInformationProvider = getNodeInformationProvider(discoverItems.getNode());
|
|
if (nodeInformationProvider != null) {
|
|
// Specified node was found, add node items
|
|
response.addItems(nodeInformationProvider.getNodeItems());
|
|
// Add packet extensions
|
|
response.addExtensions(nodeInformationProvider.getNodePacketExtensions());
|
|
} else if (discoverItems.getNode() != null) {
|
|
// Return <item-not-found/> error since client doesn't contain
|
|
// the specified node
|
|
response.setType(IQ.Type.error);
|
|
response.setError(XMPPError.getBuilder(XMPPError.Condition.item_not_found));
|
|
}
|
|
return response;
|
|
}
|
|
});
|
|
|
|
// Listen for disco#info requests and answer the client's supported features
|
|
// To add a new feature as supported use the #addFeature message
|
|
connection.registerIQRequestHandler(new AbstractIqRequestHandler(DiscoverInfo.ELEMENT, DiscoverInfo.NAMESPACE, IQ.Type.get, Mode.async) {
|
|
@Override
|
|
public IQ handleIQRequest(IQ iqRequest) {
|
|
DiscoverInfo discoverInfo = (DiscoverInfo) iqRequest;
|
|
// Answer the client's supported features if the request is of the GET type
|
|
DiscoverInfo response = new DiscoverInfo();
|
|
response.setType(IQ.Type.result);
|
|
response.setTo(discoverInfo.getFrom());
|
|
response.setStanzaId(discoverInfo.getStanzaId());
|
|
response.setNode(discoverInfo.getNode());
|
|
// Add the client's identity and features only if "node" is null
|
|
// and if the request was not send to a node. If Entity Caps are
|
|
// enabled the client's identity and features are may also added
|
|
// if the right node is chosen
|
|
if (discoverInfo.getNode() == null) {
|
|
addDiscoverInfoTo(response);
|
|
} else {
|
|
// Disco#info was sent to a node. Check if we have information of the
|
|
// specified node
|
|
NodeInformationProvider nodeInformationProvider = getNodeInformationProvider(discoverInfo.getNode());
|
|
if (nodeInformationProvider != null) {
|
|
// Node was found. Add node features
|
|
response.addFeatures(nodeInformationProvider.getNodeFeatures());
|
|
// Add node identities
|
|
response.addIdentities(nodeInformationProvider.getNodeIdentities());
|
|
// Add packet extensions
|
|
response.addExtensions(nodeInformationProvider.getNodePacketExtensions());
|
|
} else {
|
|
// Return <item-not-found/> error since specified node was not found
|
|
response.setType(IQ.Type.error);
|
|
response.setError(XMPPError.getBuilder(XMPPError.Condition.item_not_found));
|
|
}
|
|
}
|
|
return response;
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Returns the name of the client that will be returned when asked for the client identity
|
|
* in a disco request. The name could be any value you need to identity this client.
|
|
*
|
|
* @return the name of the client that will be returned when asked for the client identity
|
|
* in a disco request.
|
|
*/
|
|
public String getIdentityName() {
|
|
return identity.getName();
|
|
}
|
|
|
|
/**
|
|
* Sets the default identity the client will report.
|
|
*
|
|
* @param identity
|
|
*/
|
|
public synchronized void setIdentity(Identity identity) {
|
|
this.identity = Objects.requireNonNull(identity, "Identity can not be null");
|
|
// Notify others of a state change of SDM. In order to keep the state consistent, this
|
|
// method is synchronized
|
|
renewEntityCapsVersion();
|
|
}
|
|
|
|
/**
|
|
* Return the default identity of the client.
|
|
*
|
|
* @return the default identity.
|
|
*/
|
|
public Identity getIdentity() {
|
|
return identity;
|
|
}
|
|
|
|
/**
|
|
* Returns the type of client that will be returned when asked for the client identity in a
|
|
* disco request. The valid types are defined by the category client. Follow this link to learn
|
|
* the possible types: <a href="http://xmpp.org/registrar/disco-categories.html#client">Jabber::Registrar</a>.
|
|
*
|
|
* @return the type of client that will be returned when asked for the client identity in a
|
|
* disco request.
|
|
*/
|
|
public String getIdentityType() {
|
|
return identity.getType();
|
|
}
|
|
|
|
/**
|
|
* Add an further identity to the client.
|
|
*
|
|
* @param identity
|
|
*/
|
|
public synchronized void addIdentity(DiscoverInfo.Identity identity) {
|
|
identities.add(identity);
|
|
// Notify others of a state change of SDM. In order to keep the state consistent, this
|
|
// method is synchronized
|
|
renewEntityCapsVersion();
|
|
}
|
|
|
|
/**
|
|
* Remove an identity from the client. Note that the client needs at least one identity, the default identity, which
|
|
* can not be removed.
|
|
*
|
|
* @param identity
|
|
* @return true, if successful. Otherwise the default identity was given.
|
|
*/
|
|
public synchronized boolean removeIdentity(DiscoverInfo.Identity identity) {
|
|
if (identity.equals(this.identity)) return false;
|
|
identities.remove(identity);
|
|
// Notify others of a state change of SDM. In order to keep the state consistent, this
|
|
// method is synchronized
|
|
renewEntityCapsVersion();
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns all identities of this client as unmodifiable Collection.
|
|
*
|
|
* @return all identies as set
|
|
*/
|
|
public Set<DiscoverInfo.Identity> getIdentities() {
|
|
Set<Identity> res = new HashSet<Identity>(identities);
|
|
// Add the default identity that must exist
|
|
res.add(defaultIdentity);
|
|
return Collections.unmodifiableSet(res);
|
|
}
|
|
|
|
/**
|
|
* Returns the ServiceDiscoveryManager instance associated with a given XMPPConnection.
|
|
*
|
|
* @param connection the connection used to look for the proper ServiceDiscoveryManager.
|
|
* @return the ServiceDiscoveryManager associated with a given XMPPConnection.
|
|
*/
|
|
public static synchronized ServiceDiscoveryManager getInstanceFor(XMPPConnection connection) {
|
|
ServiceDiscoveryManager sdm = instances.get(connection);
|
|
if (sdm == null) {
|
|
sdm = new ServiceDiscoveryManager(connection);
|
|
// Register the new instance and associate it with the connection
|
|
instances.put(connection, sdm);
|
|
}
|
|
return sdm;
|
|
}
|
|
|
|
/**
|
|
* Add discover info response data.
|
|
*
|
|
* @see <a href="http://xmpp.org/extensions/xep-0030.html#info-basic">XEP-30 Basic Protocol; Example 2</a>
|
|
*
|
|
* @param response the discover info response packet
|
|
*/
|
|
public synchronized void addDiscoverInfoTo(DiscoverInfo response) {
|
|
// First add the identities of the connection
|
|
response.addIdentities(getIdentities());
|
|
|
|
// Add the registered features to the response
|
|
for (String feature : getFeatures()) {
|
|
response.addFeature(feature);
|
|
}
|
|
response.addExtension(extendedInfo);
|
|
}
|
|
|
|
/**
|
|
* Returns the NodeInformationProvider responsible for providing information
|
|
* (ie items) related to a given node or <tt>null</null> if none.<p>
|
|
*
|
|
* In MUC, a node could be 'http://jabber.org/protocol/muc#rooms' which means that the
|
|
* NodeInformationProvider will provide information about the rooms where the user has joined.
|
|
*
|
|
* @param node the node that contains items associated with an entity not addressable as a JID.
|
|
* @return the NodeInformationProvider responsible for providing information related
|
|
* to a given node.
|
|
*/
|
|
private NodeInformationProvider getNodeInformationProvider(String node) {
|
|
if (node == null) {
|
|
return null;
|
|
}
|
|
return nodeInformationProviders.get(node);
|
|
}
|
|
|
|
/**
|
|
* Sets the NodeInformationProvider responsible for providing information
|
|
* (ie items) related to a given node. Every time this client receives a disco request
|
|
* regarding the items of a given node, the provider associated to that node will be the
|
|
* responsible for providing the requested information.<p>
|
|
*
|
|
* In MUC, a node could be 'http://jabber.org/protocol/muc#rooms' which means that the
|
|
* NodeInformationProvider will provide information about the rooms where the user has joined.
|
|
*
|
|
* @param node the node whose items will be provided by the NodeInformationProvider.
|
|
* @param listener the NodeInformationProvider responsible for providing items related
|
|
* to the node.
|
|
*/
|
|
public void setNodeInformationProvider(String node, NodeInformationProvider listener) {
|
|
nodeInformationProviders.put(node, listener);
|
|
}
|
|
|
|
/**
|
|
* Removes the NodeInformationProvider responsible for providing information
|
|
* (ie items) related to a given node. This means that no more information will be
|
|
* available for the specified node.
|
|
*
|
|
* In MUC, a node could be 'http://jabber.org/protocol/muc#rooms' which means that the
|
|
* NodeInformationProvider will provide information about the rooms where the user has joined.
|
|
*
|
|
* @param node the node to remove the associated NodeInformationProvider.
|
|
*/
|
|
public void removeNodeInformationProvider(String node) {
|
|
nodeInformationProviders.remove(node);
|
|
}
|
|
|
|
/**
|
|
* Returns the supported features by this XMPP entity.
|
|
* <p>
|
|
* The result is a copied modifiable list of the original features.
|
|
* </p>
|
|
*
|
|
* @return a List of the supported features by this XMPP entity.
|
|
*/
|
|
public synchronized List<String> getFeatures() {
|
|
return new ArrayList<String>(features);
|
|
}
|
|
|
|
/**
|
|
* Registers that a new feature is supported by this XMPP entity. When this client is
|
|
* queried for its information the registered features will be answered.<p>
|
|
*
|
|
* Since no stanza(/packet) is actually sent to the server it is safe to perform this operation
|
|
* before logging to the server. In fact, you may want to configure the supported features
|
|
* before logging to the server so that the information is already available if it is required
|
|
* upon login.
|
|
*
|
|
* @param feature the feature to register as supported.
|
|
*/
|
|
public synchronized void addFeature(String feature) {
|
|
features.add(feature);
|
|
// Notify others of a state change of SDM. In order to keep the state consistent, this
|
|
// method is synchronized
|
|
renewEntityCapsVersion();
|
|
}
|
|
|
|
/**
|
|
* Removes the specified feature from the supported features by this XMPP entity.<p>
|
|
*
|
|
* Since no stanza(/packet) is actually sent to the server it is safe to perform this operation
|
|
* before logging to the server.
|
|
*
|
|
* @param feature the feature to remove from the supported features.
|
|
*/
|
|
public synchronized void removeFeature(String feature) {
|
|
features.remove(feature);
|
|
// Notify others of a state change of SDM. In order to keep the state consistent, this
|
|
// method is synchronized
|
|
renewEntityCapsVersion();
|
|
}
|
|
|
|
/**
|
|
* Returns true if the specified feature is registered in the ServiceDiscoveryManager.
|
|
*
|
|
* @param feature the feature to look for.
|
|
* @return a boolean indicating if the specified featured is registered or not.
|
|
*/
|
|
public synchronized boolean includesFeature(String feature) {
|
|
return features.contains(feature);
|
|
}
|
|
|
|
/**
|
|
* Registers extended discovery information of this XMPP entity. When this
|
|
* client is queried for its information this data form will be returned as
|
|
* specified by XEP-0128.
|
|
* <p>
|
|
*
|
|
* Since no stanza(/packet) is actually sent to the server it is safe to perform this
|
|
* operation before logging to the server. In fact, you may want to
|
|
* configure the extended info before logging to the server so that the
|
|
* information is already available if it is required upon login.
|
|
*
|
|
* @param info
|
|
* the data form that contains the extend service discovery
|
|
* information.
|
|
*/
|
|
public synchronized void setExtendedInfo(DataForm info) {
|
|
extendedInfo = info;
|
|
// Notify others of a state change of SDM. In order to keep the state consistent, this
|
|
// method is synchronized
|
|
renewEntityCapsVersion();
|
|
}
|
|
|
|
/**
|
|
* Returns the data form that is set as extended information for this Service Discovery instance (XEP-0128).
|
|
*
|
|
* @see <a href="http://xmpp.org/extensions/xep-0128.html">XEP-128: Service Discovery Extensions</a>
|
|
* @return the data form
|
|
*/
|
|
public DataForm getExtendedInfo() {
|
|
return extendedInfo;
|
|
}
|
|
|
|
/**
|
|
* Returns the data form as List of PacketExtensions, or null if no data form is set.
|
|
* This representation is needed by some classes (e.g. EntityCapsManager, NodeInformationProvider)
|
|
*
|
|
* @return the data form as List of PacketExtensions
|
|
*/
|
|
public List<ExtensionElement> getExtendedInfoAsList() {
|
|
List<ExtensionElement> res = null;
|
|
if (extendedInfo != null) {
|
|
res = new ArrayList<ExtensionElement>(1);
|
|
res.add(extendedInfo);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* Removes the data form containing extended service discovery information
|
|
* from the information returned by this XMPP entity.<p>
|
|
*
|
|
* Since no stanza(/packet) is actually sent to the server it is safe to perform this
|
|
* operation before logging to the server.
|
|
*/
|
|
public synchronized void removeExtendedInfo() {
|
|
extendedInfo = null;
|
|
// Notify others of a state change of SDM. In order to keep the state consistent, this
|
|
// method is synchronized
|
|
renewEntityCapsVersion();
|
|
}
|
|
|
|
/**
|
|
* Returns the discovered information of a given XMPP entity addressed by its JID.
|
|
* Use null as entityID to query the server
|
|
*
|
|
* @param entityID the address of the XMPP entity or null.
|
|
* @return the discovered information.
|
|
* @throws XMPPErrorException
|
|
* @throws NoResponseException
|
|
* @throws NotConnectedException
|
|
* @throws InterruptedException
|
|
*/
|
|
public DiscoverInfo discoverInfo(Jid entityID) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
|
|
if (entityID == null)
|
|
return discoverInfo(null, null);
|
|
|
|
// Check if the have it cached in the Entity Capabilities Manager
|
|
DiscoverInfo info = EntityCapsManager.getDiscoverInfoByUser(entityID);
|
|
|
|
if (info != null) {
|
|
// We were able to retrieve the information from Entity Caps and
|
|
// avoided a disco request, hurray!
|
|
return info;
|
|
}
|
|
|
|
// Try to get the newest node#version if it's known, otherwise null is
|
|
// returned
|
|
EntityCapsManager.NodeVerHash nvh = EntityCapsManager.getNodeVerHashByJid(entityID);
|
|
|
|
// Discover by requesting the information from the remote entity
|
|
// Note that wee need to use NodeVer as argument for Node if it exists
|
|
info = discoverInfo(entityID, nvh != null ? nvh.getNodeVer() : null);
|
|
|
|
// If the node version is known, store the new entry.
|
|
if (nvh != null) {
|
|
if (EntityCapsManager.verifyDiscoverInfoVersion(nvh.getVer(), nvh.getHash(), info))
|
|
EntityCapsManager.addDiscoverInfoByNode(nvh.getNodeVer(), info);
|
|
}
|
|
|
|
return info;
|
|
}
|
|
|
|
/**
|
|
* Returns the discovered information of a given XMPP entity addressed by its JID and
|
|
* note attribute. Use this message only when trying to query information which is not
|
|
* directly addressable.
|
|
*
|
|
* @see <a href="http://xmpp.org/extensions/xep-0030.html#info-basic">XEP-30 Basic Protocol</a>
|
|
* @see <a href="http://xmpp.org/extensions/xep-0030.html#info-nodes">XEP-30 Info Nodes</a>
|
|
*
|
|
* @param entityID the address of the XMPP entity.
|
|
* @param node the optional attribute that supplements the 'jid' attribute.
|
|
* @return the discovered information.
|
|
* @throws XMPPErrorException if the operation failed for some reason.
|
|
* @throws NoResponseException if there was no response from the server.
|
|
* @throws NotConnectedException
|
|
* @throws InterruptedException
|
|
*/
|
|
public DiscoverInfo discoverInfo(Jid entityID, String node) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
|
|
// Discover the entity's info
|
|
DiscoverInfo disco = new DiscoverInfo();
|
|
disco.setType(IQ.Type.get);
|
|
disco.setTo(entityID);
|
|
disco.setNode(node);
|
|
|
|
Stanza result = connection().createStanzaCollectorAndSend(disco).nextResultOrThrow();
|
|
|
|
return (DiscoverInfo) result;
|
|
}
|
|
|
|
/**
|
|
* Returns the discovered items of a given XMPP entity addressed by its JID.
|
|
*
|
|
* @param entityID the address of the XMPP entity.
|
|
* @return the discovered information.
|
|
* @throws XMPPErrorException if the operation failed for some reason.
|
|
* @throws NoResponseException if there was no response from the server.
|
|
* @throws NotConnectedException
|
|
* @throws InterruptedException
|
|
*/
|
|
public DiscoverItems discoverItems(Jid entityID) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
|
|
return discoverItems(entityID, null);
|
|
}
|
|
|
|
/**
|
|
* Returns the discovered items of a given XMPP entity addressed by its JID and
|
|
* note attribute. Use this message only when trying to query information which is not
|
|
* directly addressable.
|
|
*
|
|
* @param entityID the address of the XMPP entity.
|
|
* @param node the optional attribute that supplements the 'jid' attribute.
|
|
* @return the discovered items.
|
|
* @throws XMPPErrorException if the operation failed for some reason.
|
|
* @throws NoResponseException if there was no response from the server.
|
|
* @throws NotConnectedException
|
|
* @throws InterruptedException
|
|
*/
|
|
public DiscoverItems discoverItems(Jid entityID, String node) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
|
|
// Discover the entity's items
|
|
DiscoverItems disco = new DiscoverItems();
|
|
disco.setType(IQ.Type.get);
|
|
disco.setTo(entityID);
|
|
disco.setNode(node);
|
|
|
|
Stanza result = connection().createStanzaCollectorAndSend(disco).nextResultOrThrow();
|
|
return (DiscoverItems) result;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the server supports publishing of items. A client may wish to publish items
|
|
* to the server so that the server can provide items associated to the client. These items will
|
|
* be returned by the server whenever the server receives a disco request targeted to the bare
|
|
* address of the client (i.e. user@host.com).
|
|
*
|
|
* @param entityID the address of the XMPP entity.
|
|
* @return true if the server supports publishing of items.
|
|
* @throws XMPPErrorException
|
|
* @throws NoResponseException
|
|
* @throws NotConnectedException
|
|
* @throws InterruptedException
|
|
*/
|
|
public boolean canPublishItems(Jid entityID) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
|
|
DiscoverInfo info = discoverInfo(entityID);
|
|
return canPublishItems(info);
|
|
}
|
|
|
|
/**
|
|
* Returns true if the server supports publishing of items. A client may wish to publish items
|
|
* to the server so that the server can provide items associated to the client. These items will
|
|
* be returned by the server whenever the server receives a disco request targeted to the bare
|
|
* address of the client (i.e. user@host.com).
|
|
*
|
|
* @param info the discover info stanza(/packet) to check.
|
|
* @return true if the server supports publishing of items.
|
|
*/
|
|
public static boolean canPublishItems(DiscoverInfo info) {
|
|
return info.containsFeature("http://jabber.org/protocol/disco#publish");
|
|
}
|
|
|
|
/**
|
|
* Publishes new items to a parent entity. The item elements to publish MUST have at least
|
|
* a 'jid' attribute specifying the Entity ID of the item, and an action attribute which
|
|
* specifies the action being taken for that item. Possible action values are: "update" and
|
|
* "remove".
|
|
*
|
|
* @param entityID the address of the XMPP entity.
|
|
* @param discoverItems the DiscoveryItems to publish.
|
|
* @throws XMPPErrorException
|
|
* @throws NoResponseException
|
|
* @throws NotConnectedException
|
|
* @throws InterruptedException
|
|
*/
|
|
public void publishItems(Jid entityID, DiscoverItems discoverItems) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
|
|
publishItems(entityID, null, discoverItems);
|
|
}
|
|
|
|
/**
|
|
* Publishes new items to a parent entity and node. The item elements to publish MUST have at
|
|
* least a 'jid' attribute specifying the Entity ID of the item, and an action attribute which
|
|
* specifies the action being taken for that item. Possible action values are: "update" and
|
|
* "remove".
|
|
*
|
|
* @param entityID the address of the XMPP entity.
|
|
* @param node the attribute that supplements the 'jid' attribute.
|
|
* @param discoverItems the DiscoveryItems to publish.
|
|
* @throws XMPPErrorException if the operation failed for some reason.
|
|
* @throws NoResponseException if there was no response from the server.
|
|
* @throws NotConnectedException
|
|
* @throws InterruptedException
|
|
*/
|
|
public void publishItems(Jid entityID, String node, DiscoverItems discoverItems) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
|
|
{
|
|
discoverItems.setType(IQ.Type.set);
|
|
discoverItems.setTo(entityID);
|
|
discoverItems.setNode(node);
|
|
|
|
connection().createStanzaCollectorAndSend(discoverItems).nextResultOrThrow();
|
|
}
|
|
|
|
/**
|
|
* Returns true if the server supports the given feature.
|
|
*
|
|
* @param feature
|
|
* @return true if the server supports the given feature.
|
|
* @throws NoResponseException
|
|
* @throws XMPPErrorException
|
|
* @throws NotConnectedException
|
|
* @throws InterruptedException
|
|
* @since 4.1
|
|
*/
|
|
public boolean serverSupportsFeature(CharSequence feature) throws NoResponseException, XMPPErrorException,
|
|
NotConnectedException, InterruptedException {
|
|
return serverSupportsFeatures(feature);
|
|
}
|
|
|
|
public boolean serverSupportsFeatures(CharSequence... features) throws NoResponseException,
|
|
XMPPErrorException, NotConnectedException, InterruptedException {
|
|
return serverSupportsFeatures(Arrays.asList(features));
|
|
}
|
|
|
|
public boolean serverSupportsFeatures(Collection<? extends CharSequence> features)
|
|
throws NoResponseException, XMPPErrorException, NotConnectedException,
|
|
InterruptedException {
|
|
return supportsFeatures(connection().getXMPPServiceDomain(), features);
|
|
}
|
|
|
|
/**
|
|
* Queries the remote entity for it's features and returns true if the given feature is found.
|
|
*
|
|
* @param jid the JID of the remote entity
|
|
* @param feature
|
|
* @return true if the entity supports the feature, false otherwise
|
|
* @throws XMPPErrorException
|
|
* @throws NoResponseException
|
|
* @throws NotConnectedException
|
|
* @throws InterruptedException
|
|
*/
|
|
public boolean supportsFeature(Jid jid, CharSequence feature) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
|
|
return supportsFeatures(jid, feature);
|
|
}
|
|
|
|
public boolean supportsFeatures(Jid jid, CharSequence... features) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
|
|
return supportsFeatures(jid, Arrays.asList(features));
|
|
}
|
|
|
|
public boolean supportsFeatures(Jid jid, Collection<? extends CharSequence> features) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
|
|
DiscoverInfo result = discoverInfo(jid);
|
|
for (CharSequence feature : features) {
|
|
if (!result.containsFeature(feature)) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Create a cache to hold the 25 most recently lookup services for a given feature for a period
|
|
* of 24 hours.
|
|
*/
|
|
private Cache<String, List<DiscoverInfo>> services = new ExpirationCache<>(25,
|
|
24 * 60 * 60 * 1000);
|
|
|
|
/**
|
|
* Find all services under the users service that provide a given feature.
|
|
*
|
|
* @param feature the feature to search for
|
|
* @param stopOnFirst if true, stop searching after the first service was found
|
|
* @param useCache if true, query a cache first to avoid network I/O
|
|
* @return a possible empty list of services providing the given feature
|
|
* @throws NoResponseException
|
|
* @throws XMPPErrorException
|
|
* @throws NotConnectedException
|
|
* @throws InterruptedException
|
|
*/
|
|
public List<DiscoverInfo> findServicesDiscoverInfo(String feature, boolean stopOnFirst, boolean useCache)
|
|
throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
|
|
List<DiscoverInfo> serviceDiscoInfo = null;
|
|
DomainBareJid serviceName = connection().getXMPPServiceDomain();
|
|
if (useCache) {
|
|
serviceDiscoInfo = services.lookup(feature);
|
|
if (serviceDiscoInfo != null) {
|
|
return serviceDiscoInfo;
|
|
}
|
|
}
|
|
serviceDiscoInfo = new LinkedList<>();
|
|
// Send the disco packet to the server itself
|
|
DiscoverInfo info;
|
|
try {
|
|
info = discoverInfo(serviceName);
|
|
} catch (XMPPErrorException e) {
|
|
// Be extra robust here: Return the empty linked list and log this situation
|
|
LOGGER.log(Level.WARNING, "Could not discover information about service", e);
|
|
return serviceDiscoInfo;
|
|
}
|
|
// Check if the server supports the feature
|
|
if (info.containsFeature(feature)) {
|
|
serviceDiscoInfo.add(info);
|
|
if (stopOnFirst) {
|
|
if (useCache) {
|
|
// Cache the discovered information
|
|
services.put(feature, serviceDiscoInfo);
|
|
}
|
|
return serviceDiscoInfo;
|
|
}
|
|
}
|
|
DiscoverItems items;
|
|
try {
|
|
// Get the disco items and send the disco packet to each server item
|
|
items = discoverItems(serviceName);
|
|
} catch (XMPPErrorException e) {
|
|
LOGGER.log(Level.WARNING, "Could not discover items about service", e);
|
|
return serviceDiscoInfo;
|
|
}
|
|
for (DiscoverItems.Item item : items.getItems()) {
|
|
try {
|
|
// TODO is it OK here in all cases to query without the node attribute?
|
|
// MultipleRecipientManager queried initially also with the node attribute, but this
|
|
// could be simply a fault instead of intentional.
|
|
info = discoverInfo(item.getEntityID());
|
|
}
|
|
catch (XMPPErrorException | NoResponseException e) {
|
|
// Don't throw this exceptions if one of the server's items fail
|
|
LOGGER.log(Level.WARNING, "Exception while discovering info for feature " + feature
|
|
+ " of " + item.getEntityID() + " node: " + item.getNode(), e);
|
|
continue;
|
|
}
|
|
if (info.containsFeature(feature)) {
|
|
serviceDiscoInfo.add(info);
|
|
//serviceAddresses.add(item.getEntityID().asDomainBareJid());
|
|
if (stopOnFirst) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (useCache) {
|
|
// Cache the discovered information
|
|
services.put(feature, serviceDiscoInfo);
|
|
}
|
|
return serviceDiscoInfo;
|
|
}
|
|
|
|
/**
|
|
* Find all services under the users service that provide a given feature.
|
|
*
|
|
* @param feature the feature to search for
|
|
* @param stopOnFirst if true, stop searching after the first service was found
|
|
* @param useCache if true, query a cache first to avoid network I/O
|
|
* @return a possible empty list of services providing the given feature
|
|
* @throws NoResponseException
|
|
* @throws XMPPErrorException
|
|
* @throws NotConnectedException
|
|
* @throws InterruptedException
|
|
*/
|
|
public List<DomainBareJid> findServices(String feature, boolean stopOnFirst, boolean useCache) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
|
|
List<DiscoverInfo> services = findServicesDiscoverInfo(feature, stopOnFirst, useCache);
|
|
List<DomainBareJid> res = new ArrayList<>(services.size());
|
|
for (DiscoverInfo info : services) {
|
|
res.add(info.getFrom().asDomainBareJid());
|
|
}
|
|
return res;
|
|
}
|
|
|
|
public DomainBareJid findService(String feature, boolean useCache, String category, String type)
|
|
throws NoResponseException, XMPPErrorException, NotConnectedException,
|
|
InterruptedException {
|
|
List<DiscoverInfo> services = findServicesDiscoverInfo(feature, true, useCache);
|
|
if (services.isEmpty()) {
|
|
return null;
|
|
}
|
|
DiscoverInfo info = services.get(0);
|
|
if (category != null && type != null) {
|
|
if (!info.hasIdentity(category, type)) {
|
|
return null;
|
|
}
|
|
}
|
|
else if (category != null || type != null) {
|
|
throw new IllegalArgumentException("Must specify either both, category and type, or none");
|
|
}
|
|
return info.getFrom().asDomainBareJid();
|
|
}
|
|
|
|
public DomainBareJid findService(String feature, boolean useCache) throws NoResponseException,
|
|
XMPPErrorException, NotConnectedException, InterruptedException {
|
|
return findService(feature, useCache, null, null);
|
|
}
|
|
|
|
/**
|
|
* Entity Capabilities
|
|
*/
|
|
|
|
/**
|
|
* Loads the ServiceDiscoveryManager with an EntityCapsManger that speeds up certain lookups.
|
|
*
|
|
* @param manager
|
|
*/
|
|
public void setEntityCapsManager(EntityCapsManager manager) {
|
|
capsManager = manager;
|
|
}
|
|
|
|
/**
|
|
* Updates the Entity Capabilities Verification String if EntityCaps is enabled.
|
|
*/
|
|
private void renewEntityCapsVersion() {
|
|
if (capsManager != null && capsManager.entityCapsEnabled())
|
|
capsManager.updateLocalEntityCaps();
|
|
}
|
|
}
|