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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tomcat.websocket;
import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.ProxySelector;
import java.net.SocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.ByteBuffer;
import java.nio.channels.AsynchronousChannelGroup;
import java.nio.channels.AsynchronousSocketChannel;
import java.nio.charset.StandardCharsets;
import java.security.KeyStore;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Random;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLParameters;
import javax.net.ssl.TrustManagerFactory;
import javax.websocket.ClientEndpoint;
import javax.websocket.ClientEndpointConfig;
import javax.websocket.CloseReason;
import javax.websocket.CloseReason.CloseCodes;
import javax.websocket.DeploymentException;
import javax.websocket.Endpoint;
import javax.websocket.Extension;
import javax.websocket.HandshakeResponse;
import javax.websocket.Session;
import javax.websocket.WebSocketContainer;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.InstanceManager;
import org.apache.tomcat.util.codec.binary.Base64;
import org.apache.tomcat.util.res.StringManager;
import org.apache.tomcat.websocket.pojo.PojoEndpointClient;
public class WsWebSocketContainer
implements WebSocketContainer, BackgroundProcess {
/**
* Property name to set to configure the value that is passed to
* {@link SSLEngine#setEnabledProtocols(String[])}. The value should be a
* comma separated string.
*/
public static final String SSL_PROTOCOLS_PROPERTY =
"org.apache.tomcat.websocket.SSL_PROTOCOLS";
public static final String SSL_TRUSTSTORE_PROPERTY =
"org.apache.tomcat.websocket.SSL_TRUSTSTORE";
public static final String SSL_TRUSTSTORE_PWD_PROPERTY =
"org.apache.tomcat.websocket.SSL_TRUSTSTORE_PWD";
public static final String SSL_TRUSTSTORE_PWD_DEFAULT = "changeit";
/**
* Property name to set to configure used SSLContext. The value should be an
* instance of SSLContext. If this property is present, the SSL_TRUSTSTORE*
* properties are ignored.
*/
public static final String SSL_CONTEXT_PROPERTY =
"org.apache.tomcat.websocket.SSL_CONTEXT";
/**
* Property name to set to configure the timeout (in milliseconds) when
* establishing a WebSocket connection to server. The default is
* {@link #IO_TIMEOUT_MS_DEFAULT}.
*/
public static final String IO_TIMEOUT_MS_PROPERTY =
"org.apache.tomcat.websocket.IO_TIMEOUT_MS";
public static final long IO_TIMEOUT_MS_DEFAULT = 5000;
private static final StringManager sm =
StringManager.getManager(Constants.PACKAGE_NAME);
private static final Random RANDOM = new Random();
private static final byte[] CRLF = new byte[] { 13, 10 };
private static final byte[] GET_BYTES = "GET ".getBytes(StandardCharsets.ISO_8859_1);
private static final byte[] ROOT_URI_BYTES = "/".getBytes(StandardCharsets.ISO_8859_1);
private static final byte[] HTTP_VERSION_BYTES =
" HTTP/1.1\r\n".getBytes(StandardCharsets.ISO_8859_1);
private volatile AsynchronousChannelGroup asynchronousChannelGroup = null;
private final Object asynchronousChannelGroupLock = new Object();
private final Log log = LogFactory.getLog(WsWebSocketContainer.class); // must not be static
private final Map> endpointSessionMap =
new HashMap>();
private final Map sessions = new ConcurrentHashMap();
private final Object endPointSessionMapLock = new Object();
private long defaultAsyncTimeout = -1;
private int maxBinaryMessageBufferSize = Constants.DEFAULT_BUFFER_SIZE;
private int maxTextMessageBufferSize = Constants.DEFAULT_BUFFER_SIZE;
private volatile long defaultMaxSessionIdleTimeout = 0;
private int backgroundProcessCount = 0;
private int processPeriod = Constants.DEFAULT_PROCESS_PERIOD;
private InstanceManager instanceManager;
InstanceManager getInstanceManager() {
return instanceManager;
}
protected void setInstanceManager(InstanceManager instanceManager) {
this.instanceManager = instanceManager;
}
@Override
public Session connectToServer(Object pojo, URI path)
throws DeploymentException {
ClientEndpoint annotation =
pojo.getClass().getAnnotation(ClientEndpoint.class);
if (annotation == null) {
throw new DeploymentException(
sm.getString("wsWebSocketContainer.missingAnnotation",
pojo.getClass().getName()));
}
Endpoint ep = new PojoEndpointClient(pojo, Arrays.asList(annotation.decoders()));
Class configuratorClazz =
annotation.configurator();
ClientEndpointConfig.Configurator configurator = null;
if (!ClientEndpointConfig.Configurator.class.equals(
configuratorClazz)) {
try {
configurator = configuratorClazz.newInstance();
} catch (InstantiationException e) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.defaultConfiguratorFail"), e);
} catch (IllegalAccessException e) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.defaultConfiguratorFail"), e);
}
}
ClientEndpointConfig.Builder builder = ClientEndpointConfig.Builder.create();
// Avoid NPE when using RI API JAR - see BZ 56343
if (configurator != null) {
builder.configurator(configurator);
}
ClientEndpointConfig config = builder.
decoders(Arrays.asList(annotation.decoders())).
encoders(Arrays.asList(annotation.encoders())).
preferredSubprotocols(Arrays.asList(annotation.subprotocols())).
build();
return connectToServer(ep, config, path);
}
@Override
public Session connectToServer(Class annotatedEndpointClass, URI path)
throws DeploymentException {
Object pojo;
try {
pojo = annotatedEndpointClass.newInstance();
} catch (InstantiationException e) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.endpointCreateFail",
annotatedEndpointClass.getName()), e);
} catch (IllegalAccessException e) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.endpointCreateFail",
annotatedEndpointClass.getName()), e);
}
return connectToServer(pojo, path);
}
@Override
public Session connectToServer(Class clazz,
ClientEndpointConfig clientEndpointConfiguration, URI path)
throws DeploymentException {
Endpoint endpoint;
try {
endpoint = clazz.newInstance();
} catch (InstantiationException e) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.endpointCreateFail", clazz.getName()),
e);
} catch (IllegalAccessException e) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.endpointCreateFail", clazz.getName()),
e);
}
return connectToServer(endpoint, clientEndpointConfiguration, path);
}
@Override
public Session connectToServer(Endpoint endpoint,
ClientEndpointConfig clientEndpointConfiguration, URI path)
throws DeploymentException {
return connectToServerRecursive(endpoint, clientEndpointConfiguration, path, new HashSet());
}
private Session connectToServerRecursive(Endpoint endpoint,
ClientEndpointConfig clientEndpointConfiguration, URI path,
Set redirectSet)
throws DeploymentException {
boolean secure = false;
ByteBuffer proxyConnect = null;
URI proxyPath;
// Validate scheme (and build proxyPath)
String scheme = path.getScheme();
if ("ws".equalsIgnoreCase(scheme)) {
proxyPath = URI.create("http" + path.toString().substring(2));
} else if ("wss".equalsIgnoreCase(scheme)) {
proxyPath = URI.create("https" + path.toString().substring(3));
secure = true;
} else {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.pathWrongScheme", scheme));
}
// Validate host
String host = path.getHost();
if (host == null) {
throw new DeploymentException(
sm.getString("wsWebSocketContainer.pathNoHost"));
}
int port = path.getPort();
SocketAddress sa = null;
// Check to see if a proxy is configured. Javadoc indicates return value
// will never be null
List proxies = ProxySelector.getDefault().select(proxyPath);
Proxy selectedProxy = null;
for (Proxy proxy : proxies) {
if (proxy.type().equals(Proxy.Type.HTTP)) {
sa = proxy.address();
if (sa instanceof InetSocketAddress) {
InetSocketAddress inet = (InetSocketAddress) sa;
if (inet.isUnresolved()) {
sa = new InetSocketAddress(inet.getHostName(), inet.getPort());
}
}
selectedProxy = proxy;
break;
}
}
// If the port is not explicitly specified, compute it based on the
// scheme
if (port == -1) {
if ("ws".equalsIgnoreCase(scheme)) {
port = 80;
} else {
// Must be wss due to scheme validation above
port = 443;
}
}
// If sa is null, no proxy is configured so need to create sa
if (sa == null) {
sa = new InetSocketAddress(host, port);
} else {
proxyConnect = createProxyRequest(host, port);
}
// Create the initial HTTP request to open the WebSocket connection
Map> reqHeaders = createRequestHeaders(host, port,
clientEndpointConfiguration);
clientEndpointConfiguration.getConfigurator().beforeRequest(reqHeaders);
if (Constants.DEFAULT_ORIGIN_HEADER_VALUE != null
&& !reqHeaders.containsKey(Constants.ORIGIN_HEADER_NAME)) {
List originValues = new ArrayList(1);
originValues.add(Constants.DEFAULT_ORIGIN_HEADER_VALUE);
reqHeaders.put(Constants.ORIGIN_HEADER_NAME, originValues);
}
ByteBuffer request = createRequest(path, reqHeaders);
AsynchronousSocketChannel socketChannel;
try {
socketChannel = AsynchronousSocketChannel.open(getAsynchronousChannelGroup());
} catch (IOException ioe) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.asynchronousSocketChannelFail"), ioe);
}
Map userProperties = clientEndpointConfiguration.getUserProperties();
// Get the connection timeout
long timeout = IO_TIMEOUT_MS_DEFAULT;
String timeoutValue = (String) userProperties.get(IO_TIMEOUT_MS_PROPERTY);
if (timeoutValue != null) {
timeout = Long.valueOf(timeoutValue).intValue();
}
// Set-up
// Same size as the WsFrame input buffer
ByteBuffer response = ByteBuffer.allocate(getDefaultMaxBinaryMessageBufferSize());
String subProtocol;
boolean success = false;
List extensionsAgreed = new ArrayList();
Transformation transformation = null;
// Open the connection
Future fConnect = socketChannel.connect(sa);
AsyncChannelWrapper channel = null;
if (proxyConnect != null) {
try {
fConnect.get(timeout, TimeUnit.MILLISECONDS);
// Proxy CONNECT is clear text
channel = new AsyncChannelWrapperNonSecure(socketChannel);
writeRequest(channel, proxyConnect, timeout);
HttpResponse httpResponse = processResponse(response, channel, timeout);
if (httpResponse.getStatus() != 200) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.proxyConnectFail", selectedProxy,
Integer.toString(httpResponse.getStatus())));
}
} catch (Exception e) {
if (channel != null) {
channel.close();
}
throw new DeploymentException(
sm.getString("wsWebSocketContainer.httpRequestFailed"), e);
}
}
if (secure) {
// Regardless of whether a non-secure wrapper was created for a
// proxy CONNECT, need to use TLS from this point on so wrap the
// original AsynchronousSocketChannel
SSLEngine sslEngine = createSSLEngine(userProperties, host, port);
channel = new AsyncChannelWrapperSecure(socketChannel, sslEngine);
} else if (channel == null) {
// Only need to wrap as this point if it wasn't wrapped to process a
// proxy CONNECT
channel = new AsyncChannelWrapperNonSecure(socketChannel);
}
try {
fConnect.get(timeout, TimeUnit.MILLISECONDS);
Future fHandshake = channel.handshake();
fHandshake.get(timeout, TimeUnit.MILLISECONDS);
writeRequest(channel, request, timeout);
HttpResponse httpResponse = processResponse(response, channel, timeout);
// Check maximum permitted redirects
int maxRedirects = Constants.MAX_REDIRECTIONS_DEFAULT;
String maxRedirectsValue =
(String) userProperties.get(Constants.MAX_REDIRECTIONS_PROPERTY);
if (maxRedirectsValue != null) {
maxRedirects = Integer.parseInt(maxRedirectsValue);
}
if (httpResponse.status != 101) {
if(isRedirectStatus(httpResponse.status)){
List locationHeader =
httpResponse.getHandshakeResponse().getHeaders().get(
Constants.LOCATION_HEADER_NAME);
if (locationHeader == null || locationHeader.isEmpty() ||
locationHeader.get(0) == null || locationHeader.get(0).isEmpty()) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.missingLocationHeader",
Integer.toString(httpResponse.status)));
}
URI redirectLocation = URI.create(locationHeader.get(0)).normalize();
if (!redirectLocation.isAbsolute()) {
redirectLocation = path.resolve(redirectLocation);
}
String redirectScheme = redirectLocation.getScheme().toLowerCase();
if (redirectScheme.startsWith("http")) {
redirectLocation = new URI(redirectScheme.replace("http", "ws"),
redirectLocation.getUserInfo(), redirectLocation.getHost(),
redirectLocation.getPort(), redirectLocation.getPath(),
redirectLocation.getQuery(), redirectLocation.getFragment());
}
if (!redirectSet.add(redirectLocation) || redirectSet.size() > maxRedirects) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.redirectThreshold", redirectLocation,
Integer.toString(redirectSet.size()),
Integer.toString(maxRedirects)));
}
return connectToServerRecursive(endpoint, clientEndpointConfiguration, redirectLocation, redirectSet);
}
else if (httpResponse.status == 401) {
if (userProperties.get(Constants.AUTHORIZATION_HEADER_NAME) != null) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.failedAuthentication",
Integer.valueOf(httpResponse.status)));
}
List wwwAuthenticateHeaders = httpResponse.getHandshakeResponse()
.getHeaders().get(Constants.WWW_AUTHENTICATE_HEADER_NAME);
if (wwwAuthenticateHeaders == null || wwwAuthenticateHeaders.isEmpty() ||
wwwAuthenticateHeaders.get(0) == null || wwwAuthenticateHeaders.get(0).isEmpty()) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.missingWWWAuthenticateHeader",
Integer.toString(httpResponse.status)));
}
String authScheme = wwwAuthenticateHeaders.get(0).split("\\s+", 2)[0];
String requestUri = new String(request.array(), StandardCharsets.ISO_8859_1)
.split("\\s", 3)[1];
Authenticator auth = AuthenticatorFactory.getAuthenticator(authScheme);
if (auth == null) {
throw new DeploymentException(
sm.getString("wsWebSocketContainer.unsupportedAuthScheme",
Integer.valueOf(httpResponse.status), authScheme));
}
userProperties.put(Constants.AUTHORIZATION_HEADER_NAME, auth.getAuthorization(
requestUri, wwwAuthenticateHeaders.get(0), userProperties));
return connectToServerRecursive(endpoint, clientEndpointConfiguration, path, redirectSet);
}
else {
throw new DeploymentException(sm.getString("wsWebSocketContainer.invalidStatus",
Integer.toString(httpResponse.status)));
}
}
HandshakeResponse handshakeResponse = httpResponse.getHandshakeResponse();
clientEndpointConfiguration.getConfigurator().afterResponse(handshakeResponse);
// Sub-protocol
List protocolHeaders = handshakeResponse.getHeaders().get(
Constants.WS_PROTOCOL_HEADER_NAME);
if (protocolHeaders == null || protocolHeaders.size() == 0) {
subProtocol = null;
} else if (protocolHeaders.size() == 1) {
subProtocol = protocolHeaders.get(0);
} else {
throw new DeploymentException(
sm.getString("wsWebSocketContainer.invalidSubProtocol"));
}
// Extensions
// Should normally only be one header but handle the case of
// multiple headers
List extHeaders = handshakeResponse.getHeaders().get(
Constants.WS_EXTENSIONS_HEADER_NAME);
if (extHeaders != null) {
for (String extHeader : extHeaders) {
Util.parseExtensionHeader(extensionsAgreed, extHeader);
}
}
// Build the transformations
TransformationFactory factory = TransformationFactory.getInstance();
for (Extension extension : extensionsAgreed) {
List> wrapper = new ArrayList>(1);
wrapper.add(extension.getParameters());
Transformation t = factory.create(extension.getName(), wrapper, false);
if (t == null) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.invalidExtensionParameters"));
}
if (transformation == null) {
transformation = t;
} else {
transformation.setNext(t);
}
}
success = true;
} catch (ExecutionException e) {
throw new DeploymentException(
sm.getString("wsWebSocketContainer.httpRequestFailed"), e);
} catch (InterruptedException e) {
throw new DeploymentException(
sm.getString("wsWebSocketContainer.httpRequestFailed"), e);
} catch (AuthenticationException e) {
throw new DeploymentException(
sm.getString("wsWebSocketContainer.httpRequestFailed"), e);
} catch (SSLException e) {
throw new DeploymentException(
sm.getString("wsWebSocketContainer.httpRequestFailed"), e);
} catch (EOFException e) {
throw new DeploymentException(
sm.getString("wsWebSocketContainer.httpRequestFailed"), e);
} catch (TimeoutException e) {
throw new DeploymentException(
sm.getString("wsWebSocketContainer.httpRequestFailed"), e);
} catch (URISyntaxException e) {
throw new DeploymentException(
sm.getString("wsWebSocketContainer.httpRequestFailed"), e);
} finally {
if (!success) {
channel.close();
}
}
// Switch to WebSocket
WsRemoteEndpointImplClient wsRemoteEndpointClient = new WsRemoteEndpointImplClient(channel);
WsSession wsSession = new WsSession(endpoint, wsRemoteEndpointClient,
this, null, null, null, null, null, extensionsAgreed,
subProtocol, Collections.emptyMap(), secure,
clientEndpointConfiguration);
WsFrameClient wsFrameClient = new WsFrameClient(response, channel,
wsSession, transformation);
// WsFrame adds the necessary final transformations. Copy the
// completed transformation chain to the remote end point.
wsRemoteEndpointClient.setTransformation(wsFrameClient.getTransformation());
endpoint.onOpen(wsSession, clientEndpointConfiguration);
registerSession(endpoint, wsSession);
/* It is possible that the server sent one or more messages as soon as
* the WebSocket connection was established. Depending on the exact
* timing of when those messages were sent they could be sat in the
* input buffer waiting to be read and will not trigger a "data
* available to read" event. Therefore, it is necessary to process the
* input buffer here. Note that this happens on the current thread which
* means that this thread will be used for any onMessage notifications.
* This is a special case. Subsequent "data available to read" events
* will be handled by threads from the AsyncChannelGroup's executor.
*/
wsFrameClient.startInputProcessing();
return wsSession;
}
private static void writeRequest(AsyncChannelWrapper channel, ByteBuffer request,
long timeout) throws TimeoutException, InterruptedException, ExecutionException {
int toWrite = request.limit();
Future fWrite = channel.write(request);
Integer thisWrite = fWrite.get(timeout, TimeUnit.MILLISECONDS);
toWrite -= thisWrite.intValue();
while (toWrite > 0) {
fWrite = channel.write(request);
thisWrite = fWrite.get(timeout, TimeUnit.MILLISECONDS);
toWrite -= thisWrite.intValue();
}
}
private static boolean isRedirectStatus(int httpResponseCode) {
boolean isRedirect = false;
switch (httpResponseCode) {
case Constants.MULTIPLE_CHOICES:
case Constants.MOVED_PERMANENTLY:
case Constants.FOUND:
case Constants.SEE_OTHER:
case Constants.USE_PROXY:
case Constants.TEMPORARY_REDIRECT:
isRedirect = true;
break;
default:
break;
}
return isRedirect;
}
private static ByteBuffer createProxyRequest(String host, int port) {
StringBuilder request = new StringBuilder();
request.append("CONNECT ");
request.append(host);
request.append(':');
request.append(port);
request.append(" HTTP/1.1\r\nProxy-Connection: keep-alive\r\nConnection: keepalive\r\nHost: ");
request.append(host);
request.append(':');
request.append(port);
request.append("\r\n\r\n");
byte[] bytes = request.toString().getBytes(StandardCharsets.ISO_8859_1);
return ByteBuffer.wrap(bytes);
}
protected void registerSession(Endpoint endpoint, WsSession wsSession) {
if (!wsSession.isOpen()) {
// The session was closed during onOpen. No need to register it.
return;
}
synchronized (endPointSessionMapLock) {
if (endpointSessionMap.size() == 0) {
BackgroundProcessManager.getInstance().register(this);
}
Set wsSessions = endpointSessionMap.get(endpoint);
if (wsSessions == null) {
wsSessions = new HashSet();
endpointSessionMap.put(endpoint, wsSessions);
}
wsSessions.add(wsSession);
}
sessions.put(wsSession, wsSession);
}
protected void unregisterSession(Endpoint endpoint, WsSession wsSession) {
synchronized (endPointSessionMapLock) {
Set wsSessions = endpointSessionMap.get(endpoint);
if (wsSessions != null) {
wsSessions.remove(wsSession);
if (wsSessions.size() == 0) {
endpointSessionMap.remove(endpoint);
}
}
if (endpointSessionMap.size() == 0) {
BackgroundProcessManager.getInstance().unregister(this);
}
}
sessions.remove(wsSession);
}
Set getOpenSessions(Endpoint endpoint) {
HashSet result = new HashSet();
synchronized (endPointSessionMapLock) {
Set sessions = endpointSessionMap.get(endpoint);
if (sessions != null) {
result.addAll(sessions);
}
}
return result;
}
private static Map> createRequestHeaders(String host, int port,
ClientEndpointConfig clientEndpointConfiguration) {
Map> headers = new HashMap>();
List extensions = clientEndpointConfiguration.getExtensions();
List subProtocols = clientEndpointConfiguration.getPreferredSubprotocols();
Map userProperties = clientEndpointConfiguration.getUserProperties();
if (userProperties.get(Constants.AUTHORIZATION_HEADER_NAME) != null) {
List authValues = new ArrayList(1);
authValues.add((String) userProperties.get(Constants.AUTHORIZATION_HEADER_NAME));
headers.put(Constants.AUTHORIZATION_HEADER_NAME, authValues);
}
// Host header
List hostValues = new ArrayList(1);
if (port == -1) {
hostValues.add(host);
} else {
hostValues.add(host + ':' + port);
}
headers.put(Constants.HOST_HEADER_NAME, hostValues);
// Upgrade header
List upgradeValues = new ArrayList(1);
upgradeValues.add(Constants.UPGRADE_HEADER_VALUE);
headers.put(Constants.UPGRADE_HEADER_NAME, upgradeValues);
// Connection header
List connectionValues = new ArrayList(1);
connectionValues.add(Constants.CONNECTION_HEADER_VALUE);
headers.put(Constants.CONNECTION_HEADER_NAME, connectionValues);
// WebSocket version header
List wsVersionValues = new ArrayList(1);
wsVersionValues.add(Constants.WS_VERSION_HEADER_VALUE);
headers.put(Constants.WS_VERSION_HEADER_NAME, wsVersionValues);
// WebSocket key
List wsKeyValues = new ArrayList(1);
wsKeyValues.add(generateWsKeyValue());
headers.put(Constants.WS_KEY_HEADER_NAME, wsKeyValues);
// WebSocket sub-protocols
if (subProtocols != null && subProtocols.size() > 0) {
headers.put(Constants.WS_PROTOCOL_HEADER_NAME, subProtocols);
}
// WebSocket extensions
if (extensions != null && extensions.size() > 0) {
headers.put(Constants.WS_EXTENSIONS_HEADER_NAME,
generateExtensionHeaders(extensions));
}
return headers;
}
private static List generateExtensionHeaders(List extensions) {
List result = new ArrayList(extensions.size());
for (Extension extension : extensions) {
StringBuilder header = new StringBuilder();
header.append(extension.getName());
for (Extension.Parameter param : extension.getParameters()) {
header.append(';');
header.append(param.getName());
String value = param.getValue();
if (value != null && value.length() > 0) {
header.append('=');
header.append(value);
}
}
result.add(header.toString());
}
return result;
}
private static String generateWsKeyValue() {
byte[] keyBytes = new byte[16];
RANDOM.nextBytes(keyBytes);
return Base64.encodeBase64String(keyBytes);
}
private static ByteBuffer createRequest(URI uri, Map> reqHeaders) {
ByteBuffer result = ByteBuffer.allocate(4 * 1024);
// Request line
result.put(GET_BYTES);
byte[] path = (null == uri.getPath() || "".equals(uri.getPath()))
? ROOT_URI_BYTES : uri.getRawPath().getBytes(StandardCharsets.ISO_8859_1);
result.put(path);
String query = uri.getRawQuery();
if (query != null) {
result.put((byte) '?');
result.put(query.getBytes(StandardCharsets.ISO_8859_1));
}
result.put(HTTP_VERSION_BYTES);
// Headers
for (Entry> entry : reqHeaders.entrySet()) {
result = addHeader(result, entry.getKey(), entry.getValue());
}
// Terminating CRLF
result.put(CRLF);
result.flip();
return result;
}
private static ByteBuffer addHeader(ByteBuffer result, String key, List values) {
StringBuilder sb = new StringBuilder();
Iterator iter = values.iterator();
if (!iter.hasNext()) {
return result;
}
sb.append(iter.next());
while (iter.hasNext()) {
sb.append(',');
sb.append(iter.next());
}
result = putWithExpand(result, key.getBytes(StandardCharsets.ISO_8859_1));
result = putWithExpand(result, ": ".getBytes(StandardCharsets.ISO_8859_1));
result = putWithExpand(result, sb.toString().getBytes(StandardCharsets.ISO_8859_1));
result = putWithExpand(result, CRLF);
return result;
}
private static ByteBuffer putWithExpand(ByteBuffer input, byte[] bytes) {
if (bytes.length > input.remaining()) {
int newSize;
if (bytes.length > input.capacity()) {
newSize = 2 * bytes.length;
} else {
newSize = input.capacity() * 2;
}
ByteBuffer expanded = ByteBuffer.allocate(newSize);
input.flip();
expanded.put(input);
input = expanded;
}
return input.put(bytes);
}
/**
* Process response, blocking until HTTP response has been fully received.
* @throws ExecutionException
* @throws InterruptedException
* @throws DeploymentException
* @throws TimeoutException
*/
private HttpResponse processResponse(ByteBuffer response,
AsyncChannelWrapper channel, long timeout) throws InterruptedException,
ExecutionException, DeploymentException, EOFException,
TimeoutException {
Map> headers = new CaseInsensitiveKeyMap>();
int status = 0;
boolean readStatus = false;
boolean readHeaders = false;
String line = null;
while (!readHeaders) {
// On entering loop buffer will be empty and at the start of a new
// loop the buffer will have been fully read.
response.clear();
// Blocking read
Future read = channel.read(response);
Integer bytesRead = read.get(timeout, TimeUnit.MILLISECONDS);
if (bytesRead.intValue() == -1) {
throw new EOFException();
}
response.flip();
while (response.hasRemaining() && !readHeaders) {
if (line == null) {
line = readLine(response);
} else {
line += readLine(response);
}
if ("\r\n".equals(line)) {
readHeaders = true;
} else if (line.endsWith("\r\n")) {
if (readStatus) {
parseHeaders(line, headers);
} else {
status = parseStatus(line);
readStatus = true;
}
line = null;
}
}
}
return new HttpResponse(status, new WsHandshakeResponse(headers));
}
private int parseStatus(String line) throws DeploymentException {
// This client only understands HTTP 1.
// RFC2616 is case specific
String[] parts = line.trim().split(" ");
// CONNECT for proxy may return a 1.0 response
if (parts.length < 2 || !("HTTP/1.0".equals(parts[0]) || "HTTP/1.1".equals(parts[0]))) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.invalidStatus", line));
}
try {
return Integer.parseInt(parts[1]);
} catch (NumberFormatException nfe) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.invalidStatus", line));
}
}
private void parseHeaders(String line, Map> headers) {
// Treat headers as single values by default.
int index = line.indexOf(':');
if (index == -1) {
log.warn(sm.getString("wsWebSocketContainer.invalidHeader", line));
return;
}
// Header names are case insensitive so always use lower case
String headerName = line.substring(0, index).trim().toLowerCase(Locale.ENGLISH);
// Multi-value headers are stored as a single header and the client is
// expected to handle splitting into individual values
String headerValue = line.substring(index + 1).trim();
List values = headers.get(headerName);
if (values == null) {
values = new ArrayList(1);
headers.put(headerName, values);
}
values.add(headerValue);
}
private String readLine(ByteBuffer response) {
// All ISO-8859-1
StringBuilder sb = new StringBuilder();
char c = 0;
while (response.hasRemaining()) {
c = (char) response.get();
sb.append(c);
if (c == 10) {
break;
}
}
return sb.toString();
}
private SSLEngine createSSLEngine(Map userProperties, String host, int port)
throws DeploymentException {
try {
// See if a custom SSLContext has been provided
SSLContext sslContext =
(SSLContext) userProperties.get(SSL_CONTEXT_PROPERTY);
if (sslContext == null) {
// Create the SSL Context
sslContext = SSLContext.getInstance("TLS");
// Trust store
String sslTrustStoreValue =
(String) userProperties.get(SSL_TRUSTSTORE_PROPERTY);
if (sslTrustStoreValue != null) {
String sslTrustStorePwdValue = (String) userProperties.get(
SSL_TRUSTSTORE_PWD_PROPERTY);
if (sslTrustStorePwdValue == null) {
sslTrustStorePwdValue = SSL_TRUSTSTORE_PWD_DEFAULT;
}
File keyStoreFile = new File(sslTrustStoreValue);
KeyStore ks = KeyStore.getInstance("JKS");
InputStream is = null;
try {
is = new FileInputStream(keyStoreFile);
ks.load(is, sslTrustStorePwdValue.toCharArray());
} finally {
if (is != null) {
try {
is.close();
} catch (IOException ioe) {
// Ignore
}
}
}
TrustManagerFactory tmf = TrustManagerFactory.getInstance(
TrustManagerFactory.getDefaultAlgorithm());
tmf.init(ks);
sslContext.init(null, tmf.getTrustManagers(), null);
} else {
sslContext.init(null, null, null);
}
}
SSLEngine engine = sslContext.createSSLEngine(host, port);
String sslProtocolsValue =
(String) userProperties.get(SSL_PROTOCOLS_PROPERTY);
if (sslProtocolsValue != null) {
engine.setEnabledProtocols(sslProtocolsValue.split(","));
}
engine.setUseClientMode(true);
// Enable host verification
// Start with current settings (returns a copy)
SSLParameters sslParams = engine.getSSLParameters();
// Use HTTPS since WebSocket starts over HTTP(S)
sslParams.setEndpointIdentificationAlgorithm("HTTPS");
// Write the parameters back
engine.setSSLParameters(sslParams);
return engine;
} catch (Exception e) {
throw new DeploymentException(sm.getString(
"wsWebSocketContainer.sslEngineFail"), e);
}
}
@Override
public long getDefaultMaxSessionIdleTimeout() {
return defaultMaxSessionIdleTimeout;
}
@Override
public void setDefaultMaxSessionIdleTimeout(long timeout) {
this.defaultMaxSessionIdleTimeout = timeout;
}
@Override
public int getDefaultMaxBinaryMessageBufferSize() {
return maxBinaryMessageBufferSize;
}
@Override
public void setDefaultMaxBinaryMessageBufferSize(int max) {
maxBinaryMessageBufferSize = max;
}
@Override
public int getDefaultMaxTextMessageBufferSize() {
return maxTextMessageBufferSize;
}
@Override
public void setDefaultMaxTextMessageBufferSize(int max) {
maxTextMessageBufferSize = max;
}
/**
* {@inheritDoc}
*
* Currently, this implementation does not support any extensions.
*/
@Override
public Set getInstalledExtensions() {
return Collections.emptySet();
}
/**
* {@inheritDoc}
*
* The default value for this implementation is -1.
*/
@Override
public long getDefaultAsyncSendTimeout() {
return defaultAsyncTimeout;
}
/**
* {@inheritDoc}
*
* The default value for this implementation is -1.
*/
@Override
public void setAsyncSendTimeout(long timeout) {
this.defaultAsyncTimeout = timeout;
}
/**
* Cleans up the resources still in use by WebSocket sessions created from
* this container. This includes closing sessions and cancelling
* {@link Future}s associated with blocking read/writes.
*/
public void destroy() {
CloseReason cr = new CloseReason(
CloseCodes.GOING_AWAY, sm.getString("wsWebSocketContainer.shutdown"));
for (WsSession session : sessions.keySet()) {
try {
session.close(cr);
} catch (IOException ioe) {
log.debug(sm.getString(
"wsWebSocketContainer.sessionCloseFail", session.getId()), ioe);
}
}
// Only unregister with AsyncChannelGroupUtil if this instance
// registered with it
if (asynchronousChannelGroup != null) {
synchronized (asynchronousChannelGroupLock) {
if (asynchronousChannelGroup != null) {
AsyncChannelGroupUtil.unregister();
asynchronousChannelGroup = null;
}
}
}
}
private AsynchronousChannelGroup getAsynchronousChannelGroup() {
// Use AsyncChannelGroupUtil to share a common group amongst all
// WebSocket clients
AsynchronousChannelGroup result = asynchronousChannelGroup;
if (result == null) {
synchronized (asynchronousChannelGroupLock) {
if (asynchronousChannelGroup == null) {
asynchronousChannelGroup = AsyncChannelGroupUtil.register();
}
result = asynchronousChannelGroup;
}
}
return result;
}
// ----------------------------------------------- BackgroundProcess methods
@Override
public void backgroundProcess() {
// This method gets called once a second.
backgroundProcessCount ++;
if (backgroundProcessCount >= processPeriod) {
backgroundProcessCount = 0;
for (WsSession wsSession : sessions.keySet()) {
wsSession.checkExpiration();
}
}
}
@Override
public void setProcessPeriod(int period) {
this.processPeriod = period;
}
/**
* {@inheritDoc}
*
* The default value is 10 which means session expirations are processed
* every 10 seconds.
*/
@Override
public int getProcessPeriod() {
return processPeriod;
}
private static class HttpResponse {
private final int status;
private final HandshakeResponse handshakeResponse;
public HttpResponse(int status, HandshakeResponse handshakeResponse) {
this.status = status;
this.handshakeResponse = handshakeResponse;
}
public int getStatus() {
return status;
}
public HandshakeResponse getHandshakeResponse() {
return handshakeResponse;
}
}
}
