/**
* Calculate the ver attribute.
*
* @param info The discover info to calculate the ver.
* @param hashMethod the hash algorithm to use.
* @return the value of the ver attribute
* @throws NoSuchAlgorithmException if the hash algorithm is not supported.
*/
private String calculateVer(DiscoverInfo info, String hashMethod)
throws NoSuchAlgorithmException {
StringBuilder s = new StringBuilder();
for (DiscoverInfo.Identity identity : getSortedIdentity(info)) {
String c = identity.getCategory();
if (c != null) s.append(c);
s.append('/');
c = identity.getType();
if (c != null) s.append(c);
s.append('/');
// Should add lang but it is not available
// c = identity.getType();
// if (c != null)
// S.append(c);
s.append('/');
c = identity.getName();
if (c != null) s.append(c);
s.append('<');
}
for (String f : getSortedFeature(info)) {
s.append(f);
s.append('<');
}
// Should add data form (XEP 0128) but it is not available
byte[] hash = getHash(hashMethod, s.toString().getBytes());
return StringUtils.encodeBase64(hash);
}
/** Discover the features provided by the server. */
private void discoverServerFeatures() {
try {
// jid et server
ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(mAdaptee);
DiscoverInfo info = sdm.discoverInfo(mAdaptee.getServiceName());
Iterator<DiscoverInfo.Identity> it = info.getIdentities();
while (it.hasNext()) {
DiscoverInfo.Identity identity = it.next();
if ("pubsub".equals(identity.getCategory()) && "pep".equals(identity.getType())) {
initPEP();
}
}
} catch (XMPPException e) {
Log.w(TAG, "Unable to discover server features", e);
}
}
/**
* Checks the service discovery item returned from a server component to verify if it is a File
* Transfer proxy or not.
*
* @param manager the service discovery manager which will be used to query the component
* @param item the discovered item on the server relating
* @return returns the JID of the proxy if it is a proxy or null if the item is not a proxy.
*/
private String checkIsProxy(ServiceDiscoveryManager manager, DiscoverItems.Item item) {
DiscoverInfo info;
try {
info = manager.discoverInfo(item.getEntityID());
} catch (XMPPException e) {
return null;
}
Iterator itx = info.getIdentities();
while (itx.hasNext()) {
DiscoverInfo.Identity identity = (DiscoverInfo.Identity) itx.next();
if ("proxy".equalsIgnoreCase(identity.getCategory())
&& "bytestreams".equalsIgnoreCase(identity.getType())) {
return info.getFrom();
}
}
return null;
}
/**
* Calculates the <tt>String</tt> for a specific <tt>DiscoverInfo</tt> which is to be hashed in
* order to compute the ver string for that <tt>DiscoverInfo</tt>.
*
* @param discoverInfo the <tt>DiscoverInfo</tt> for which the <tt>String</tt> to be hashed in
* order to compute its ver string is to be calculated
* @return the <tt>String</tt> for <tt>discoverInfo</tt> which is to be hashed in order to compute
* its ver string
*/
private static String calculateEntityCapsString(DiscoverInfo discoverInfo) {
StringBuilder bldr = new StringBuilder();
// Add identities
{
Iterator<DiscoverInfo.Identity> identities = discoverInfo.getIdentities();
SortedSet<DiscoverInfo.Identity> is =
new TreeSet<DiscoverInfo.Identity>(
new Comparator<DiscoverInfo.Identity>() {
public int compare(DiscoverInfo.Identity i1, DiscoverInfo.Identity i2) {
int category = i1.getCategory().compareTo(i2.getCategory());
if (category != 0) return category;
int type = i1.getType().compareTo(i2.getType());
if (type != 0) return type;
/*
* TODO Sort by xml:lang.
*
* Since sort by xml:lang is currently missing,
* use the last supported sort criterion i.e.
* type.
*/
return type;
}
});
if (identities != null) while (identities.hasNext()) is.add(identities.next());
for (DiscoverInfo.Identity i : is) {
bldr.append(i.getCategory())
.append('/')
.append(i.getType())
.append("//")
.append(i.getName())
.append('<');
}
}
// Add features
{
Iterator<DiscoverInfo.Feature> features = getDiscoverInfoFeatures(discoverInfo);
SortedSet<String> fs = new TreeSet<String>();
if (features != null) while (features.hasNext()) fs.add(features.next().getVar());
for (String f : fs) bldr.append(f).append('<');
}
DataForm extendedInfo = (DataForm) discoverInfo.getExtension("x", "jabber:x:data");
if (extendedInfo != null) {
synchronized (extendedInfo) {
SortedSet<FormField> fs =
new TreeSet<FormField>(
new Comparator<FormField>() {
public int compare(FormField f1, FormField f2) {
return f1.getVariable().compareTo(f2.getVariable());
}
});
FormField formType = null;
for (Iterator<FormField> fieldsIter = extendedInfo.getFields(); fieldsIter.hasNext(); ) {
FormField f = fieldsIter.next();
if (!f.getVariable().equals("FORM_TYPE")) fs.add(f);
else formType = f;
}
// Add FORM_TYPE values
if (formType != null) formFieldValuesToCaps(formType.getValues(), bldr);
// Add the other values
for (FormField f : fs) {
bldr.append(f.getVariable()).append('<');
formFieldValuesToCaps(f.getValues(), bldr);
}
}
}
return bldr.toString();
}