io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker00 Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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:
*
* https://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 io.netty.handler.codec.http.websocketx;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.http.DefaultFullHttpRequest;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpHeaderValues;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpMethod;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.HttpVersion;
import io.netty.util.internal.PlatformDependent;
import java.net.URI;
import java.nio.ByteBuffer;
/**
*
* Performs client side opening and closing handshakes for web socket specification version draft-ietf-hybi-thewebsocketprotocol-
* 00
*
*
* A very large portion of this code was taken from the Netty 3.2 HTTP example.
*
*/
public class WebSocketClientHandshaker00 extends WebSocketClientHandshaker {
private ByteBuf expectedChallengeResponseBytes;
/**
* Creates a new instance with the specified destination WebSocket location and version to initiate.
*
* @param webSocketURL
* URL for web socket communications. e.g "ws://myhost.com/mypath". Subsequent web socket frames will be
* sent to this URL.
* @param version
* Version of web socket specification to use to connect to the server
* @param subprotocol
* Sub protocol request sent to the server.
* @param customHeaders
* Map of custom headers to add to the client request
* @param maxFramePayloadLength
* Maximum length of a frame's payload
*/
public WebSocketClientHandshaker00(URI webSocketURL, WebSocketVersion version, String subprotocol,
HttpHeaders customHeaders, int maxFramePayloadLength) {
this(webSocketURL, version, subprotocol, customHeaders, maxFramePayloadLength,
DEFAULT_FORCE_CLOSE_TIMEOUT_MILLIS);
}
/**
* Creates a new instance with the specified destination WebSocket location and version to initiate.
*
* @param webSocketURL
* URL for web socket communications. e.g "ws://myhost.com/mypath". Subsequent web socket frames will be
* sent to this URL.
* @param version
* Version of web socket specification to use to connect to the server
* @param subprotocol
* Sub protocol request sent to the server.
* @param customHeaders
* Map of custom headers to add to the client request
* @param maxFramePayloadLength
* Maximum length of a frame's payload
* @param forceCloseTimeoutMillis
* Close the connection if it was not closed by the server after timeout specified
*/
public WebSocketClientHandshaker00(URI webSocketURL, WebSocketVersion version, String subprotocol,
HttpHeaders customHeaders, int maxFramePayloadLength,
long forceCloseTimeoutMillis) {
this(webSocketURL, version, subprotocol, customHeaders, maxFramePayloadLength, forceCloseTimeoutMillis, false);
}
/**
* Creates a new instance with the specified destination WebSocket location and version to initiate.
*
* @param webSocketURL
* URL for web socket communications. e.g "ws://myhost.com/mypath". Subsequent web socket frames will be
* sent to this URL.
* @param version
* Version of web socket specification to use to connect to the server
* @param subprotocol
* Sub protocol request sent to the server.
* @param customHeaders
* Map of custom headers to add to the client request
* @param maxFramePayloadLength
* Maximum length of a frame's payload
* @param forceCloseTimeoutMillis
* Close the connection if it was not closed by the server after timeout specified
* @param absoluteUpgradeUrl
* Use an absolute url for the Upgrade request, typically when connecting through an HTTP proxy over
* clear HTTP
*/
WebSocketClientHandshaker00(URI webSocketURL, WebSocketVersion version, String subprotocol,
HttpHeaders customHeaders, int maxFramePayloadLength,
long forceCloseTimeoutMillis, boolean absoluteUpgradeUrl) {
super(webSocketURL, version, subprotocol, customHeaders, maxFramePayloadLength, forceCloseTimeoutMillis,
absoluteUpgradeUrl);
}
/**
*
* Sends the opening request to the server:
*
*
*
* GET /demo HTTP/1.1
* Upgrade: WebSocket
* Connection: Upgrade
* Host: example.com
* Origin: http://example.com
* Sec-WebSocket-Key1: 4 @1 46546xW%0l 1 5
* Sec-WebSocket-Key2: 12998 5 Y3 1 .P00
*
* ^n:ds[4U
*
*
*/
@Override
protected FullHttpRequest newHandshakeRequest() {
// Make keys
int spaces1 = WebSocketUtil.randomNumber(1, 12);
int spaces2 = WebSocketUtil.randomNumber(1, 12);
int max1 = Integer.MAX_VALUE / spaces1;
int max2 = Integer.MAX_VALUE / spaces2;
int number1 = WebSocketUtil.randomNumber(0, max1);
int number2 = WebSocketUtil.randomNumber(0, max2);
int product1 = number1 * spaces1;
int product2 = number2 * spaces2;
String key1 = Integer.toString(product1);
String key2 = Integer.toString(product2);
key1 = insertRandomCharacters(key1);
key2 = insertRandomCharacters(key2);
key1 = insertSpaces(key1, spaces1);
key2 = insertSpaces(key2, spaces2);
byte[] key3 = WebSocketUtil.randomBytes(8);
ByteBuffer buffer = ByteBuffer.allocate(4);
buffer.putInt(number1);
byte[] number1Array = buffer.array();
buffer = ByteBuffer.allocate(4);
buffer.putInt(number2);
byte[] number2Array = buffer.array();
byte[] challenge = new byte[16];
System.arraycopy(number1Array, 0, challenge, 0, 4);
System.arraycopy(number2Array, 0, challenge, 4, 4);
System.arraycopy(key3, 0, challenge, 8, 8);
expectedChallengeResponseBytes = Unpooled.wrappedBuffer(WebSocketUtil.md5(challenge));
URI wsURL = uri();
// Format request
FullHttpRequest request = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, upgradeUrl(wsURL),
Unpooled.wrappedBuffer(key3));
HttpHeaders headers = request.headers();
if (customHeaders != null) {
headers.add(customHeaders);
}
headers.set(HttpHeaderNames.UPGRADE, HttpHeaderValues.WEBSOCKET)
.set(HttpHeaderNames.CONNECTION, HttpHeaderValues.UPGRADE)
.set(HttpHeaderNames.HOST, websocketHostValue(wsURL))
.set(HttpHeaderNames.SEC_WEBSOCKET_KEY1, key1)
.set(HttpHeaderNames.SEC_WEBSOCKET_KEY2, key2);
if (!headers.contains(HttpHeaderNames.ORIGIN)) {
headers.set(HttpHeaderNames.ORIGIN, websocketOriginValue(wsURL));
}
String expectedSubprotocol = expectedSubprotocol();
if (expectedSubprotocol != null && !expectedSubprotocol.isEmpty()) {
headers.set(HttpHeaderNames.SEC_WEBSOCKET_PROTOCOL, expectedSubprotocol);
}
// Set Content-Length to workaround some known defect.
// See also: https://www.ietf.org/mail-archive/web/hybi/current/msg02149.html
headers.set(HttpHeaderNames.CONTENT_LENGTH, key3.length);
return request;
}
/**
*
* Process server response:
*
*
*
* HTTP/1.1 101 WebSocket Protocol Handshake
* Upgrade: WebSocket
* Connection: Upgrade
* Sec-WebSocket-Origin: http://example.com
* Sec-WebSocket-Location: ws://example.com/demo
* Sec-WebSocket-Protocol: sample
*
* 8jKS'y:G*Co,Wxa-
*
*
* @param response
* HTTP response returned from the server for the request sent by beginOpeningHandshake00().
* @throws WebSocketHandshakeException
*/
@Override
protected void verify(FullHttpResponse response) {
HttpResponseStatus status = response.status();
if (!HttpResponseStatus.SWITCHING_PROTOCOLS.equals(status)) {
throw new WebSocketClientHandshakeException("Invalid handshake response getStatus: " + status, response);
}
HttpHeaders headers = response.headers();
CharSequence upgrade = headers.get(HttpHeaderNames.UPGRADE);
if (!HttpHeaderValues.WEBSOCKET.contentEqualsIgnoreCase(upgrade)) {
throw new WebSocketClientHandshakeException("Invalid handshake response upgrade: " + upgrade, response);
}
if (!headers.containsValue(HttpHeaderNames.CONNECTION, HttpHeaderValues.UPGRADE, true)) {
throw new WebSocketClientHandshakeException("Invalid handshake response connection: "
+ headers.get(HttpHeaderNames.CONNECTION), response);
}
ByteBuf challenge = response.content();
if (!challenge.equals(expectedChallengeResponseBytes)) {
throw new WebSocketClientHandshakeException("Invalid challenge", response);
}
}
private static String insertRandomCharacters(String key) {
int count = WebSocketUtil.randomNumber(1, 12);
char[] randomChars = new char[count];
int randCount = 0;
while (randCount < count) {
int rand = PlatformDependent.threadLocalRandom().nextInt(0x7e) + 0x21;
if (0x21 < rand && rand < 0x2f || 0x3a < rand && rand < 0x7e) {
randomChars[randCount] = (char) rand;
randCount += 1;
}
}
for (int i = 0; i < count; i++) {
int split = WebSocketUtil.randomNumber(0, key.length());
String part1 = key.substring(0, split);
String part2 = key.substring(split);
key = part1 + randomChars[i] + part2;
}
return key;
}
private static String insertSpaces(String key, int spaces) {
for (int i = 0; i < spaces; i++) {
int split = WebSocketUtil.randomNumber(1, key.length() - 1);
String part1 = key.substring(0, split);
String part2 = key.substring(split);
key = part1 + ' ' + part2;
}
return key;
}
@Override
protected WebSocketFrameDecoder newWebsocketDecoder() {
return new WebSocket00FrameDecoder(maxFramePayloadLength());
}
@Override
protected WebSocketFrameEncoder newWebSocketEncoder() {
return new WebSocket00FrameEncoder();
}
@Override
public WebSocketClientHandshaker00 setForceCloseTimeoutMillis(long forceCloseTimeoutMillis) {
super.setForceCloseTimeoutMillis(forceCloseTimeoutMillis);
return this;
}
}