@@ -1,54 +0,0 @@
-package eu.siacs.conversations.utils.zlib;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.zip.Inflater;
-import java.util.zip.InflaterInputStream;
-
-/**
- * ZLibInputStream is a zlib and input stream compatible version of an
- * InflaterInputStream. This class solves the incompatibility between
- * {@link InputStream#available()} and {@link InflaterInputStream#available()}.
- */
-public class ZLibInputStream extends InflaterInputStream {
-
- /**
- * Construct a ZLibInputStream, reading data from the underlying stream.
- *
- * @param is
- * The {@code InputStream} to read data from.
- * @throws IOException
- * If an {@code IOException} occurs.
- */
- public ZLibInputStream(InputStream is) throws IOException {
- super(is, new Inflater(), 512);
- }
-
- /**
- * Provide a more InputStream compatible version of available. A return
- * value of 1 means that it is likly to read one byte without blocking, 0
- * means that the system is known to block for more input.
- *
- * @return 0 if no data is available, 1 otherwise
- * @throws IOException
- */
- @Override
- public int available() throws IOException {
- /*
- * This is one of the funny code blocks. InflaterInputStream.available
- * violates the contract of InputStream.available, which breaks kXML2.
- *
- * I'm not sure who's to blame, oracle/sun for a broken api or the
- * google guys for mixing a sun bug with a xml reader that can't handle
- * it....
- *
- * Anyway, this simple if breaks suns distorted reality, but helps to
- * use the api as intended.
- */
- if (inf.needsInput()) {
- return 0;
- }
- return super.available();
- }
-
-}
@@ -1,95 +0,0 @@
-package eu.siacs.conversations.utils.zlib;
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.security.NoSuchAlgorithmException;
-import java.util.zip.Deflater;
-import java.util.zip.DeflaterOutputStream;
-
-/**
- * <p>
- * Android 2.2 includes Java7 FLUSH_SYNC option, which will be used by this
- * Implementation, preferable via reflection. The @hide was remove in API level
- * 19. This class might thus go away in the future.
- * </p>
- * <p>
- * Please use {@link ZLibOutputStream#SUPPORTED} to check for flush
- * compatibility.
- * </p>
- */
-public class ZLibOutputStream extends DeflaterOutputStream {
-
- /**
- * The reflection based flush method.
- */
-
- private final static Method method;
- /**
- * SUPPORTED is true if a flush compatible method exists.
- */
- public final static boolean SUPPORTED;
-
- /**
- * Static block to initialize {@link #SUPPORTED} and {@link #method}.
- */
- static {
- Method m = null;
- try {
- m = Deflater.class.getMethod("deflate", byte[].class, int.class,
- int.class, int.class);
- } catch (SecurityException e) {
- } catch (NoSuchMethodException e) {
- }
- method = m;
- SUPPORTED = (method != null);
- }
-
- /**
- * Create a new ZLib compatible output stream wrapping the given low level
- * stream. ZLib compatiblity means we will send a zlib header.
- *
- * @param os
- * OutputStream The underlying stream.
- * @throws IOException
- * In case of a lowlevel transfer problem.
- * @throws NoSuchAlgorithmException
- * In case of a {@link Deflater} error.
- */
- public ZLibOutputStream(OutputStream os) throws IOException,
- NoSuchAlgorithmException {
- super(os, new Deflater(Deflater.BEST_COMPRESSION));
- }
-
- /**
- * Flush the given stream, preferring Java7 FLUSH_SYNC if available.
- *
- * @throws IOException
- * In case of a lowlevel exception.
- */
- @Override
- public void flush() throws IOException {
- if (!SUPPORTED) {
- super.flush();
- return;
- }
- try {
- int count = 0;
- do {
- count = (Integer) method.invoke(def, buf, 0, buf.length, 3);
- if (count > 0) {
- out.write(buf, 0, count);
- }
- } while (count > 0);
- } catch (IllegalArgumentException e) {
- throw new IOException("Can't flush");
- } catch (IllegalAccessException e) {
- throw new IOException("Can't flush");
- } catch (InvocationTargetException e) {
- throw new IOException("Can't flush");
- }
- super.flush();
- }
-
-}
@@ -50,8 +50,6 @@ import eu.siacs.conversations.crypto.sasl.ScramSha1;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.utils.DNSHelper;
-import eu.siacs.conversations.utils.zlib.ZLibInputStream;
-import eu.siacs.conversations.utils.zlib.ZLibOutputStream;
import eu.siacs.conversations.xml.Element;
import eu.siacs.conversations.xml.Tag;
import eu.siacs.conversations.xml.TagWriter;
@@ -92,7 +90,6 @@ public class XmppConnection implements Runnable {
private int smVersion = 3;
private SparseArray<String> messageReceipts = new SparseArray<>();
- private boolean enabledCompression = false;
private boolean enabledEncryption = false;
private boolean enabledCarbons = false;
@@ -144,7 +141,6 @@ public class XmppConnection implements Runnable {
protected void connect() {
Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
- enabledCompression = false;
enabledEncryption = false;
lastConnect = SystemClock.elapsedRealtime();
lastPingSent = SystemClock.elapsedRealtime();
@@ -261,8 +257,6 @@ public class XmppConnection implements Runnable {
processStreamFeatures(nextTag);
} else if (nextTag.isStart("proceed")) {
switchOverToTls(nextTag);
- } else if (nextTag.isStart("compressed")) {
- switchOverToZLib(nextTag);
} else if (nextTag.isStart("success")) {
final String challenge = tagReader.readElement(nextTag).getContent();
try {
@@ -498,28 +492,6 @@ public class XmppConnection implements Runnable {
}
}
- private void sendCompressionZlib() throws IOException {
- Element compress = new Element("compress");
- compress.setAttribute("xmlns", "http://jabber.org/protocol/compress");
- compress.addChild("method").setContent("zlib");
- tagWriter.writeElement(compress);
- }
-
- private void switchOverToZLib(final Tag currentTag)
- throws XmlPullParserException, IOException,
- NoSuchAlgorithmException {
- tagReader.readTag(); // read tag close
- tagWriter.setOutputStream(new ZLibOutputStream(tagWriter
- .getOutputStream()));
- tagReader
- .setInputStream(new ZLibInputStream(tagReader.getInputStream()));
-
- sendStartStream();
- Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": compression enabled");
- enabledCompression = true;
- processStream(tagReader.readTag());
- }
-
private void sendStartTLS() throws IOException {
Tag startTLS = Tag.empty("starttls");
startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
@@ -601,8 +573,6 @@ public class XmppConnection implements Runnable {
this.streamFeatures = tagReader.readElement(currentTag);
if (this.streamFeatures.hasChild("starttls") && !enabledEncryption) {
sendStartTLS();
- } else if (compressionAvailable()) {
- sendCompressionZlib();
} else if (this.streamFeatures.hasChild("register")
&& account.isOptionSet(Account.OPTION_REGISTER)
&& enabledEncryption) {
@@ -658,28 +628,6 @@ public class XmppConnection implements Runnable {
}
}
- private boolean compressionAvailable() {
- if (!this.streamFeatures.hasChild("compression",
- "http://jabber.org/features/compress"))
- return false;
- if (!ZLibOutputStream.SUPPORTED)
- return false;
- if (!account.isOptionSet(Account.OPTION_USECOMPRESSION))
- return false;
-
- Element compression = this.streamFeatures.findChild("compression",
- "http://jabber.org/features/compress");
- for (Element child : compression.getChildren()) {
- if (!"method".equals(child.getName()))
- continue;
-
- if ("zlib".equalsIgnoreCase(child.getContent())) {
- return true;
- }
- }
- return false;
- }
-
private List<String> extractMechanisms(Element stream) {
ArrayList<String> mechanisms = new ArrayList<>(stream
.getChildren().size());
@@ -1147,9 +1095,5 @@ public class XmppConnection implements Runnable {
return connection
.findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
}
-
- public boolean compression() {
- return connection.enabledCompression;
- }
}
}