private void GotItems(object sender, IQ iq, object onode)
{
DiscoNode dn = onode as DiscoNode;
Debug.Assert(dn != null);
if (iq.Type != IQType.result)
{
// protocol error
dn.AddItems(this, null);
return;
}
DiscoItems items = iq.Query as DiscoItems;
if (items == null)
{
// protocol error
dn.AddItems(this, null);
return;
}
dn.AddItems(this, items.GetItems());
// automatically info everything we get an item for.
foreach (DiscoNode n in dn.Children)
{
if (n.Features == null)
{
RequestInfo(n);
}
}
}
public void Call(DiscoNode node)
{
if (callback != null)
{
callback(manager, node, state);
}
}
public void GotRootItems(DiscoManager manager, DiscoNode node, object state)
{
m_outstanding = node.Children.Count;
foreach (DiscoNode n in node.Children)
{
manager.BeginGetFeatures(n, new DiscoNodeHandler(GotFeatures), state);
}
}
/// <summary>
/// Deletes the cache.
/// </summary>
public void Clear()
{
lock (m_items)
{
m_root = null;
m_items.Clear();
}
}
internal DiscoNode AddItem(DiscoManager manager, DiscoItem di)
{
DiscoNode dn = manager.GetNode(di.Jid, di.Node);
if ((di.Named != null) && (di.Named != ""))
{
dn.Name = di.Named;
}
Children.Add(dn);
return(dn);
}
/// <summary>
/// Retrieves the child items associated with this node,
/// and then calls back on the handler.
/// If the information is in the cache, handler gets
/// called right now.
/// </summary>
/// <param name="node">Disco node to search.</param>
/// <param name="handler">Callback that gets called with the items.</param>
/// <param name="state">Context to pass back to caller when complete</param>
public void BeginGetItems(DiscoNode node, DiscoNodeHandler handler, object state)
{
if (node == null)
{
node = Root;
}
if (node.AddItemsCallback(this, handler, state))
{
RequestItems(node);
}
}
/// <summary>
/// Retrieves the features associated with this node and
/// then calls back on the handler.
/// If the information is in the cache, handler gets called right now.
/// </summary>
/// <param name="node">Node to look for.</param>
/// <param name="handler">Callback to use afterwards.</param>
/// <param name="state">Context to pass back to caller when complete</param>
public void BeginGetFeatures(DiscoNode node, DiscoNodeHandler handler, object state)
{
if (node == null)
{
node = Root;
}
if (node.AddFeatureCallback(this, handler, state))
{
RequestInfo(node);
}
}
/// <summary>
/// Create a CapsManager from an existing Disco Node. Pass in null
/// to use a placeholder.
/// </summary>
/// <param name="node"></param>
public CapsManager(DiscoNode node)
{
InitializeComponent();
this.OnStreamChanged += new bedrock.ObjectHandler(CapsManager_OnStreamChanged);
if (node == null)
{
m_disco = new DiscoNode(new JID(null, "placeholder", null), null);
}
else
{
m_disco = node;
}
}
/// <summary>
/// Creates nodes and ensure that they are cached.
/// </summary>
/// <param name="jid">JID associated with DiscoNode.</param>
/// <param name="node">Node associated with DiscoNode.</param>
/// <returns>
/// If DiscoNode exists, returns the found node.
/// Otherwise it creates the node and return it.
/// </returns>
public DiscoNode GetNode(JID jid, string node)
{
lock (m_items)
{
string key = DiscoNode.GetKey(jid, node);
DiscoNode n = (DiscoNode)m_items[key];
if (n == null)
{
n = new DiscoNode(jid, node);
m_items.Add(key, n);
}
return(n);
}
}
private void RequestItems(DiscoNode node)
{
lock (node)
{
if (!node.PendingItems)
{
IQ iq = node.ItemsIQ(m_stream.Document);
JabberService js = m_stream as JabberService;
if (js != null)
{
iq.From = js.ComponentID;
}
BeginIQ(iq, new IqCB(GotItems), node);
}
}
}
public void GotFeatures(DiscoManager manager, DiscoNode node, object state)
{
// yes, yes, this may call the handler more than once in multi-threaded world. Punt for now.
if (m_handler != null)
{
if (node.HasFeature(m_URI))
{
m_handler(manager, node, state);
m_handler = null;
}
}
if (Interlocked.Decrement(ref m_outstanding) == 0)
{
if (m_handler != null)
{
m_handler(manager, null, state);
}
}
}
private void GotInfo(object sender, IQ iq, object onode)
{
DiscoNode dn = onode as DiscoNode;
Debug.Assert(dn != null);
if (iq.Type == IQType.error)
{
if (dn == m_root)
{
// root node.
// Try agents.
Error err = iq.Error;
if (err != null)
{
string cond = err.Condition;
if ((cond == Error.FEATURE_NOT_IMPLEMENTED) ||
(cond == Error.SERVICE_UNAVAILABLE))
{
IQ aiq = new AgentsIQ(m_stream.Document);
BeginIQ(aiq, new IqCB(GotAgents), m_root);
return;
}
}
}
}
if (iq.Type != IQType.result)
{
// protocol error
dn.AddInfo(null);
return;
}
dn.AddInfo(iq.Query as DiscoInfo);
if (dn == m_root)
{
RequestItems(m_root);
}
}
private void GotCaps(DiscoManager m, DiscoNode node, object state)
{
// timeout
if (node == null)
{
return;
}
string ver = (string)state;
string calc = CalculateVer(node);
if (ver != calc)
{
Debug.WriteLine("WARNING: invalid caps ver hash: '" + ver + "' != '" + calc + "'");
if (node.Info != null)
{
Debug.WriteLine(node.Info.OuterXml);
}
return;
}
m_cache[ver] = node.Info;
}
private string CalculateVer(DiscoNode n)
{
if (m_hash == null)
{
return(null);
}
// 1. Initialize an empty string S.
StringBuilder S = new StringBuilder();
// 2. Sort the service discovery identities [16] by category and then by type
// (if it exists) and then by xml:lang (if it exists), formatted as
// CATEGORY '/' [TYPE] '/' [LANG] '/' [NAME]. Note that each slash is
// included even if the TYPE, LANG, or NAME is not included.
Ident[] ids = n.GetIdentities();
Array.Sort(ids);
// 3. For each identity, append the 'category/type/lang/name' to S, followed by
// the '<' character.
foreach (Ident id in ids)
{
S.Append(id.Key);
S.Append(SEP);
}
// 4. Sort the supported service discovery features.
string[] features = n.FeatureNames;
Array.Sort(features);
// 5. For each feature, append the feature to S, followed by the '<' character.
foreach (string feature in features)
{
S.Append(feature);
S.Append(SEP);
}
// 6. If the service discovery information response includes XEP-0128 data forms,
// sort the forms by the FORM_TYPE (i.e., by the XML character
// data of the <value/> element).
Data[] ext = n.Extensions;
if (ext != null)
{
Array.Sort(ext, new FormTypeComparer());
foreach (Data x in ext)
{
// For each extended service discovery information form:
// 1. Append the XML character data of the FORM_TYPE field's <value/>
// element, followed by the '<' character.
S.Append(x.FormType);
S.Append(SEP);
// 2. Sort the fields by the value of the "var" attribute.
bedrock.collections.Tree fields = new bedrock.collections.Tree();
foreach (Field f in x.GetFields())
{
fields[f.Var] = f;
}
// 3. For each field:
foreach (System.Collections.DictionaryEntry entry in fields)
{
Field f = (Field)entry.Value;
if (f.Var == "FORM_TYPE")
{
continue;
}
// 1. Append the value of the "var" attribute, followed by the '<' character.
S.Append(f.Var);
S.Append(SEP);
// 2. Sort values by the XML character data of the <value/> element.
string[] values = f.Vals;
Array.Sort(values);
foreach (string v in values)
{
// 3. For each <value/> element, append the XML character data, followed by the '<' character.
S.Append(v);
S.Append(SEP);
}
}
}
}
// Ensure that S is encoded according to the UTF-8 encoding (RFC 3269 [16]).
byte[] input = Encoding.UTF8.GetBytes(S.ToString());
// Compute the verification string by hashing S using the algorithm specified
// in the 'hash' attribute (e.g., SHA-1 as defined in RFC 3174 [17]). The hashed
// data MUST be generated with binary output and encoded using Base64 as specified
// in Section 4 of RFC 4648 [18] (note: the Base64 output MUST NOT include
// whitespace and MUST set padding bits to zero). [19]
HashAlgorithm hasher = GetHasher(m_hash);
byte[] hash = hasher.ComputeHash(input, 0, input.Length);
return(Convert.ToBase64String(hash));
}
/// <summary>
/// Retrieves the child items associated with this node,
/// and then calls back on the handler.
///
/// If caching is specified, items already in the cache call the handler
/// immediately.
/// </summary>
/// <param name="jid">JID of Service to query.</param>
/// <param name="node">Node on the service to interact with.</param>
/// <param name="handler">Callback that gets called with the items.</param>
/// <param name="state">Context to pass back to caller when complete</param>
/// <param name="cache">Should caching be performed on this request?</param>
public void BeginGetItems(JID jid, string node, DiscoNodeHandler handler, object state, bool cache)
{
DiscoNode dn = cache ? GetNode(jid, node) : new DiscoNode(jid, node);
BeginGetItems(dn, handler, state);
}
private void GotAgents(object sender, IQ iq, object onode)
{
DiscoNode dn = onode as DiscoNode;
Debug.Assert(dn != null);
if (iq.Type != IQType.result)
{
dn.AddItems(this, null);
return;
}
AgentsQuery aq = iq.Query as AgentsQuery;
if (aq == null)
{
dn.AddItems(this, null);
return;
}
if (dn.Children == null)
{
dn.Children = new Set();
}
foreach (Agent agent in aq.GetAgents())
{
DiscoItem di = new DiscoItem(m_stream.Document);
di.Jid = agent.JID;
di.Named = agent.AgentName;
DiscoNode child = dn.AddItem(this, di);
if (child.Features == null)
{
child.Features = new StringSet();
}
if (child.Identity == null)
{
child.Identity = new Set();
}
Ident id = new Ident();
id.Name = agent.Description;
switch (agent.Service)
{
case "groupchat":
id.Category = "conference";
id.Type = "text";
child.Identity.Add(id);
break;
case "jud":
id.Category = "directory";
id.Type = "user";
child.Identity.Add(id);
break;
case null:
case "":
break;
default:
// guess this is a transport
id.Category = "gateway";
id.Type = agent.Service;
child.Identity.Add(id);
break;
}
if (agent.Register)
{
child.Features.Add(URI.REGISTER);
}
if (agent.Search)
{
child.Features.Add(URI.SEARCH);
}
if (agent.Groupchat)
{
child.Features.Add(URI.MUC);
}
if (agent.Transport)
{
if (id.Category != "gateway")
{
Ident tid = new Ident();
tid.Name = id.Name;
tid.Category = "gateway";
child.Identity.Add(tid);
}
}
foreach (XmlElement ns in agent.GetElementsByTagName("ns"))
{
child.Features.Add(ns.InnerText);
}
child.AddItems(this, null);
child.AddIdentities(null);
child.AddFeatures((StringSet)null);
}
dn.AddItems(this, null);
dn.AddIdentities(null);
dn.AddFeatures((StringSet)null);
}