@Override
public String toString() {
return String.format(
"%s[requested=%s,negotiated=%s]",
getClass().getSimpleName(),
configRequested.getParameterizedName(),
configNegotiated.getParameterizedName());
}
@Override
public void setConfig(final ExtensionConfig config) {
configRequested = new ExtensionConfig(config);
configNegotiated = new ExtensionConfig(config.getName());
for (String key : config.getParameterKeys()) {
key = key.trim();
switch (key) {
case "client_max_window_bits":
case "server_max_window_bits":
{
// Not supported by Jetty
// Don't negotiate these parameters
break;
}
case "client_no_context_takeover":
{
configNegotiated.setParameter("client_no_context_takeover");
switch (getPolicy().getBehavior()) {
case CLIENT:
incomingContextTakeover = false;
break;
case SERVER:
outgoingContextTakeover = false;
break;
}
break;
}
case "server_no_context_takeover":
{
configNegotiated.setParameter("server_no_context_takeover");
switch (getPolicy().getBehavior()) {
case CLIENT:
outgoingContextTakeover = false;
break;
case SERVER:
incomingContextTakeover = false;
break;
}
break;
}
default:
{
throw new IllegalArgumentException();
}
}
}
super.setConfig(configNegotiated);
}
@Override
public Extension newInstance(ExtensionConfig config) {
if (config == null) {
return null;
}
String name = config.getName();
if (StringUtil.isBlank(name)) {
return null;
}
Class<? extends Extension> extClass = getExtension(name);
if (extClass == null) {
return null;
}
try {
Extension ext = extClass.newInstance();
if (ext instanceof AbstractExtension) {
AbstractExtension aext = (AbstractExtension) ext;
aext.setConfig(config);
aext.setPolicy(policy);
aext.setBufferPool(bufferPool);
}
return ext;
} catch (InstantiationException | IllegalAccessException e) {
throw new WebSocketException("Cannot instantiate extension: " + extClass, e);
}
}
/** Incoming PING (Control Frame) should pass through extension unmodified */
@Test
public void testIncomingPing() {
IncomingFramesCapture capture = new IncomingFramesCapture();
FragmentExtension ext = new FragmentExtension();
ext.setBufferPool(new MappedByteBufferPool());
ext.setPolicy(WebSocketPolicy.newServerPolicy());
ExtensionConfig config = ExtensionConfig.parse("fragment;maxLength=4");
ext.setConfig(config);
ext.setNextIncomingFrames(capture);
String payload = "Are you there?";
Frame ping = WebSocketFrame.ping().setPayload(payload);
ext.incomingFrame(ping);
capture.assertFrameCount(1);
capture.assertHasFrame(OpCode.PING, 1);
WebSocketFrame actual = capture.getFrames().getFirst();
Assert.assertThat("Frame.opcode", actual.getOpCode(), is(OpCode.PING));
Assert.assertThat("Frame.fin", actual.isFin(), is(true));
Assert.assertThat("Frame.rsv1", actual.isRsv1(), is(false));
Assert.assertThat("Frame.rsv2", actual.isRsv2(), is(false));
Assert.assertThat("Frame.rsv3", actual.isRsv3(), is(false));
ByteBuffer expected = BufferUtil.toBuffer(payload, StringUtil.__UTF8_CHARSET);
Assert.assertThat("Frame.payloadLength", actual.getPayloadLength(), is(expected.remaining()));
ByteBufferAssert.assertEquals("Frame.payload", expected, actual.getPayload().slice());
}
@Override
public void initializeNativeSession(Session session) {
super.initializeNativeSession(session);
this.id = ObjectUtils.getIdentityHexString(getNativeSession());
this.uri = session.getUpgradeRequest().getRequestURI();
this.headers = new HttpHeaders();
this.headers.putAll(getNativeSession().getUpgradeRequest().getHeaders());
this.headers = HttpHeaders.readOnlyHttpHeaders(headers);
this.acceptedProtocol = session.getUpgradeResponse().getAcceptedSubProtocol();
List<ExtensionConfig> source = getNativeSession().getUpgradeResponse().getExtensions();
this.extensions = new ArrayList<WebSocketExtension>(source.size());
for (ExtensionConfig ec : source) {
this.extensions.add(new WebSocketExtension(ec.getName(), ec.getParameters()));
}
if (this.user == null) {
this.user = session.getUpgradeRequest().getUserPrincipal();
}
}
/** Verify that incoming frames are passed thru without modification */
@Test
public void testIncomingFrames() {
IncomingFramesCapture capture = new IncomingFramesCapture();
FragmentExtension ext = new FragmentExtension();
ext.setBufferPool(new MappedByteBufferPool());
ext.setPolicy(WebSocketPolicy.newClientPolicy());
ExtensionConfig config = ExtensionConfig.parse("fragment;maxLength=4");
ext.setConfig(config);
ext.setNextIncomingFrames(capture);
// Quote
List<String> quote = new ArrayList<>();
quote.add("No amount of experimentation can ever prove me right;");
quote.add("a single experiment can prove me wrong.");
quote.add("-- Albert Einstein");
// Manually create frame and pass into extension
for (String q : quote) {
Frame frame = WebSocketFrame.text(q);
ext.incomingFrame(frame);
}
int len = quote.size();
capture.assertFrameCount(len);
capture.assertHasFrame(OpCode.TEXT, len);
String prefix;
for (int i = 0; i < len; i++) {
prefix = "Frame[" + i + "]";
WebSocketFrame actual = capture.getFrames().get(i);
Assert.assertThat(prefix + ".opcode", actual.getOpCode(), is(OpCode.TEXT));
Assert.assertThat(prefix + ".fin", actual.isFin(), is(true));
Assert.assertThat(prefix + ".rsv1", actual.isRsv1(), is(false));
Assert.assertThat(prefix + ".rsv2", actual.isRsv2(), is(false));
Assert.assertThat(prefix + ".rsv3", actual.isRsv3(), is(false));
ByteBuffer expected = BufferUtil.toBuffer(quote.get(i), StringUtil.__UTF8_CHARSET);
Assert.assertThat(
prefix + ".payloadLength", actual.getPayloadLength(), is(expected.remaining()));
ByteBufferAssert.assertEquals(prefix + ".payload", expected, actual.getPayload().slice());
}
}
private void validateResponse(ClientUpgradeResponse response) {
// Check the Accept hash
String reqKey = request.getKey();
String expectedHash = AcceptHash.hashKey(reqKey);
response.validateWebSocketHash(expectedHash);
// Parse extensions
List<ExtensionConfig> extensions = new ArrayList<>();
List<String> extValues = response.getHeaders("Sec-WebSocket-Extensions");
if (extValues != null) {
for (String extVal : extValues) {
QuotedStringTokenizer tok = new QuotedStringTokenizer(extVal, ",");
while (tok.hasMoreTokens()) {
extensions.add(ExtensionConfig.parse(tok.nextToken()));
}
}
}
response.setExtensions(extensions);
}
private void assertIncoming(byte[] raw, String... expectedTextDatas) {
WebSocketPolicy policy = WebSocketPolicy.newClientPolicy();
DeflateFrameExtension ext = new DeflateFrameExtension();
ext.setBufferPool(bufferPool);
ext.setPolicy(policy);
ExtensionConfig config = ExtensionConfig.parse("deflate-frame");
ext.setConfig(config);
// Setup capture of incoming frames
IncomingFramesCapture capture = new IncomingFramesCapture();
// Wire up stack
ext.setNextIncomingFrames(capture);
Parser parser = new UnitParser(policy);
parser.configureFromExtensions(Collections.singletonList(ext));
parser.setIncomingFramesHandler(ext);
parser.parse(ByteBuffer.wrap(raw));
int len = expectedTextDatas.length;
capture.assertFrameCount(len);
capture.assertHasFrame(OpCode.TEXT, len);
int i = 0;
for (WebSocketFrame actual : capture.getFrames()) {
String prefix = "Frame[" + i + "]";
Assert.assertThat(prefix + ".opcode", actual.getOpCode(), is(OpCode.TEXT));
Assert.assertThat(prefix + ".fin", actual.isFin(), is(true));
Assert.assertThat(
prefix + ".rsv1", actual.isRsv1(), is(false)); // RSV1 should be unset at this point
Assert.assertThat(prefix + ".rsv2", actual.isRsv2(), is(false));
Assert.assertThat(prefix + ".rsv3", actual.isRsv3(), is(false));
ByteBuffer expected = BufferUtil.toBuffer(expectedTextDatas[i], StandardCharsets.UTF_8);
Assert.assertThat(
prefix + ".payloadLength", actual.getPayloadLength(), is(expected.remaining()));
ByteBufferAssert.assertEquals(prefix + ".payload", expected, actual.getPayload().slice());
i++;
}
}
private void assertOutgoing(String text, String expectedHex) throws IOException {
WebSocketPolicy policy = WebSocketPolicy.newClientPolicy();
DeflateFrameExtension ext = new DeflateFrameExtension();
ext.setBufferPool(bufferPool);
ext.setPolicy(policy);
ExtensionConfig config = ExtensionConfig.parse("deflate-frame");
ext.setConfig(config);
boolean validating = true;
Generator generator = new Generator(policy, bufferPool, validating);
generator.configureFromExtensions(Collections.singletonList(ext));
OutgoingNetworkBytesCapture capture = new OutgoingNetworkBytesCapture(generator);
ext.setNextOutgoingFrames(capture);
Frame frame = new TextFrame().setPayload(text);
ext.outgoingFrame(frame, null);
capture.assertBytes(0, expectedHex);
}
/** Verify that outgoing text frames are fragmented by default configuration */
@Test
public void testOutgoingFramesDefaultConfig() throws IOException {
OutgoingFramesCapture capture = new OutgoingFramesCapture();
FragmentExtension ext = new FragmentExtension();
ext.setBufferPool(new MappedByteBufferPool());
ext.setPolicy(WebSocketPolicy.newServerPolicy());
ExtensionConfig config = ExtensionConfig.parse("fragment");
ext.setConfig(config);
ext.setNextOutgoingFrames(capture);
// Quote
List<String> quote = new ArrayList<>();
quote.add("No amount of experimentation can ever prove me right;");
quote.add("a single experiment can prove me wrong.");
quote.add("-- Albert Einstein");
// Write quote as separate frames
for (String section : quote) {
Frame frame = WebSocketFrame.text(section);
ext.outgoingFrame(frame, null);
}
// Expected Frames
List<WebSocketFrame> expectedFrames = new ArrayList<>();
expectedFrames.add(
new WebSocketFrame(OpCode.TEXT)
.setPayload("No amount of experimentation can ever prove me right;"));
expectedFrames.add(
new WebSocketFrame(OpCode.TEXT).setPayload("a single experiment can prove me wrong."));
expectedFrames.add(new WebSocketFrame(OpCode.TEXT).setPayload("-- Albert Einstein"));
// capture.dump();
int len = expectedFrames.size();
capture.assertFrameCount(len);
String prefix;
LinkedList<WebSocketFrame> frames = capture.getFrames();
for (int i = 0; i < len; i++) {
prefix = "Frame[" + i + "]";
WebSocketFrame actualFrame = frames.get(i);
WebSocketFrame expectedFrame = expectedFrames.get(i);
// Validate Frame
Assert.assertThat(prefix + ".opcode", actualFrame.getOpCode(), is(expectedFrame.getOpCode()));
Assert.assertThat(prefix + ".fin", actualFrame.isFin(), is(expectedFrame.isFin()));
Assert.assertThat(prefix + ".rsv1", actualFrame.isRsv1(), is(expectedFrame.isRsv1()));
Assert.assertThat(prefix + ".rsv2", actualFrame.isRsv2(), is(expectedFrame.isRsv2()));
Assert.assertThat(prefix + ".rsv3", actualFrame.isRsv3(), is(expectedFrame.isRsv3()));
// Validate Payload
ByteBuffer expectedData = expectedFrame.getPayload().slice();
ByteBuffer actualData = actualFrame.getPayload().slice();
Assert.assertThat(
prefix + ".payloadLength", actualData.remaining(), is(expectedData.remaining()));
ByteBufferAssert.assertEquals(prefix + ".payload", expectedData, actualData);
}
}
@Override
public void setConfig(ExtensionConfig config) {
super.setConfig(config);
maxLength = config.getParameter("maxLength", -1);
}