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以下内容为反编译后的 FileTransferNegotiator.java 源代码,内容仅作参考
package org.jivesoftware.smackx.filetransfer;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.Random;
import java.util.WeakHashMap;
import org.jivesoftware.smack.Manager;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smack.packet.StanzaError;
import org.jivesoftware.smackx.bytestreams.socks5.packet.Bytestream;
import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
import org.jivesoftware.smackx.filetransfer.FileTransferException;
import org.jivesoftware.smackx.si.packet.StreamInitiation;
import org.jivesoftware.smackx.xdata.FormField;
import org.jivesoftware.smackx.xdata.packet.DataForm;
public final class FileTransferNegotiator extends Manager {
public static boolean IBB_ONLY = false;
public static final String SI_NAMESPACE = "http://jabber.org/protocol/si";
public static final String STREAM_DATA_FIELD_NAME = "stream-method";
public static final String STREAM_INIT_PREFIX = "jsi_";
public final StreamNegotiator byteStreamTransferManager;
public final StreamNegotiator inbandTransferManager;
public static final String SI_PROFILE_FILE_TRANSFER_NAMESPACE = "http://jabber.org/protocol/si/profile/file-transfer";
public static final String[] NAMESPACE = {"http://jabber.org/protocol/si", SI_PROFILE_FILE_TRANSFER_NAMESPACE};
public static final Map<XMPPConnection, FileTransferNegotiator> INSTANCES = new WeakHashMap();
public static final Random randomGenerator = new Random();
static {
IBB_ONLY = System.getProperty("ibb") != null;
}
public FileTransferNegotiator(XMPPConnection xMPPConnection) {
super(xMPPConnection);
this.byteStreamTransferManager = new Socks5TransferNegotiator(xMPPConnection);
this.inbandTransferManager = new IBBTransferNegotiator(xMPPConnection);
setServiceEnabled(xMPPConnection, true);
}
public static DataForm createDefaultInitiationForm() {
DataForm dataForm = new DataForm(DataForm.Type.form);
FormField formField = new FormField(STREAM_DATA_FIELD_NAME);
formField.setType(FormField.Type.list_single);
if (!IBB_ONLY) {
formField.addOption(new FormField.Option(Bytestream.NAMESPACE));
}
formField.addOption(new FormField.Option("http://jabber.org/protocol/ibb"));
dataForm.addField(formField);
return dataForm;
}
public static synchronized FileTransferNegotiator getInstanceFor(XMPPConnection xMPPConnection) {
FileTransferNegotiator fileTransferNegotiator;
synchronized (FileTransferNegotiator.class) {
fileTransferNegotiator = INSTANCES.get(xMPPConnection);
if (fileTransferNegotiator == null) {
fileTransferNegotiator = new FileTransferNegotiator(xMPPConnection);
INSTANCES.put(xMPPConnection, fileTransferNegotiator);
}
}
return fileTransferNegotiator;
}
private StreamNegotiator getNegotiator(FormField formField) throws FileTransferException.NoAcceptableTransferMechanisms {
boolean z = false;
boolean z2 = false;
for (FormField.Option option : formField.getOptions()) {
String value = option.getValue();
if (value.equals(Bytestream.NAMESPACE) && !IBB_ONLY) {
z = true;
} else if (value.equals("http://jabber.org/protocol/ibb")) {
z2 = true;
}
}
if (z || z2) {
if (z && z2) {
return new FaultTolerantNegotiator(connection(), this.byteStreamTransferManager, this.inbandTransferManager);
}
if (z) {
return this.byteStreamTransferManager;
}
return this.inbandTransferManager;
}
throw new FileTransferException.NoAcceptableTransferMechanisms();
}
public static String getNextStreamID() {
return STREAM_INIT_PREFIX + Math.abs(randomGenerator.nextLong());
}
private StreamNegotiator getOutgoingNegotiator(FormField formField) throws FileTransferException.NoAcceptableTransferMechanisms {
boolean z = false;
boolean z2 = false;
for (CharSequence charSequence : formField.getValues()) {
if (charSequence.equals(Bytestream.NAMESPACE) && !IBB_ONLY) {
z = true;
} else if (charSequence.equals("http://jabber.org/protocol/ibb")) {
z2 = true;
}
}
if (z || z2) {
if (z && z2) {
return new FaultTolerantNegotiator(connection(), this.byteStreamTransferManager, this.inbandTransferManager);
}
if (z) {
return this.byteStreamTransferManager;
}
return this.inbandTransferManager;
}
throw new FileTransferException.NoAcceptableTransferMechanisms();
}
public static FormField getStreamMethodField(DataForm dataForm) {
return dataForm.getField(STREAM_DATA_FIELD_NAME);
}
public static Collection<String> getSupportedProtocols() {
ArrayList arrayList = new ArrayList();
arrayList.add("http://jabber.org/protocol/ibb");
if (!IBB_ONLY) {
arrayList.add(Bytestream.NAMESPACE);
}
return Collections.unmodifiableList(arrayList);
}
public static boolean isServiceEnabled(XMPPConnection xMPPConnection) {
ServiceDiscoveryManager instanceFor = ServiceDiscoveryManager.getInstanceFor(xMPPConnection);
ArrayList<String> arrayList = new ArrayList();
arrayList.addAll(Arrays.asList(NAMESPACE));
arrayList.add("http://jabber.org/protocol/ibb");
if (!IBB_ONLY) {
arrayList.add(Bytestream.NAMESPACE);
}
for (String str : arrayList) {
if (!instanceFor.includesFeature(str)) {
return false;
}
}
return true;
}
public static void setServiceEnabled(XMPPConnection xMPPConnection, boolean z) {
ServiceDiscoveryManager instanceFor = ServiceDiscoveryManager.getInstanceFor(xMPPConnection);
ArrayList<String> arrayList = new ArrayList();
arrayList.addAll(Arrays.asList(NAMESPACE));
arrayList.add("http://jabber.org/protocol/ibb");
if (!IBB_ONLY) {
arrayList.add(Bytestream.NAMESPACE);
}
for (String str : arrayList) {
if (z) {
instanceFor.addFeature(str);
} else {
instanceFor.removeFeature(str);
}
}
}
public StreamNegotiator negotiateOutgoingTransfer(xw3 xw3Var, String str, String str2, long j, String str3, int i) throws XMPPException.XMPPErrorException, SmackException.NotConnectedException, SmackException.NoResponseException, FileTransferException.NoAcceptableTransferMechanisms, InterruptedException {
StreamInitiation streamInitiation = new StreamInitiation();
streamInitiation.setSessionID(str);
streamInitiation.setMimeType(URLConnection.guessContentTypeFromName(str2));
StreamInitiation.File file = new StreamInitiation.File(str2, j);
file.setDesc(str3);
streamInitiation.setFile(file);
streamInitiation.setFeatureNegotiationForm(createDefaultInitiationForm());
streamInitiation.setFrom(connection().getUser());
streamInitiation.setTo(xw3Var);
streamInitiation.setType(IQ.Type.set);
Stanza nextResultOrThrow = connection().createStanzaCollectorAndSend(streamInitiation).nextResultOrThrow(i);
if (nextResultOrThrow instanceof IQ) {
IQ iq = (IQ) nextResultOrThrow;
if (iq.getType().equals(IQ.Type.result)) {
return getOutgoingNegotiator(getStreamMethodField(((StreamInitiation) nextResultOrThrow).getFeatureNegotiationForm()));
}
throw new XMPPException.XMPPErrorException(iq, iq.getError());
}
return null;
}
public StreamNegotiator selectStreamNegotiator(FileTransferRequest fileTransferRequest) throws SmackException.NotConnectedException, FileTransferException.NoStreamMethodsOfferedException, FileTransferException.NoAcceptableTransferMechanisms, InterruptedException {
StreamInitiation streamInitiation = fileTransferRequest.getStreamInitiation();
FormField streamMethodField = getStreamMethodField(streamInitiation.getFeatureNegotiationForm());
if (streamMethodField != null) {
try {
return getNegotiator(streamMethodField);
} catch (FileTransferException.NoAcceptableTransferMechanisms e) {
connection().sendStanza(IQ.createErrorResponse(streamInitiation, StanzaError.from(StanzaError.Condition.bad_request, "No acceptable transfer mechanism")));
throw e;
}
}
connection().sendStanza(IQ.createErrorResponse(streamInitiation, StanzaError.from(StanzaError.Condition.bad_request, "No stream methods contained in stanza.")));
throw new FileTransferException.NoStreamMethodsOfferedException();
}
}