io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker08 Maven / Gradle / Ivy
/*
* 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.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.CharsetUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import java.net.URI;
/**
*
* Performs client side opening and closing handshakes for web socket specification version draft-ietf-hybi-thewebsocketprotocol-
* 10
*
*/
public class WebSocketClientHandshaker08 extends WebSocketClientHandshaker {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(WebSocketClientHandshaker08.class);
public static final String MAGIC_GUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
private String expectedChallengeResponseString;
private final boolean allowExtensions;
private final boolean performMasking;
private final boolean allowMaskMismatch;
/**
* Creates a new instance.
*
* @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 allowExtensions
* Allow extensions to be used in the reserved bits of the web socket frame
* @param customHeaders
* Map of custom headers to add to the client request
* @param maxFramePayloadLength
* Maximum length of a frame's payload
*/
public WebSocketClientHandshaker08(URI webSocketURL, WebSocketVersion version, String subprotocol,
boolean allowExtensions, HttpHeaders customHeaders, int maxFramePayloadLength) {
this(webSocketURL, version, subprotocol, allowExtensions, customHeaders, maxFramePayloadLength, true,
false, DEFAULT_FORCE_CLOSE_TIMEOUT_MILLIS);
}
/**
* Creates a new instance.
*
* @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 allowExtensions
* Allow extensions to be used in the reserved bits of the web socket frame
* @param customHeaders
* Map of custom headers to add to the client request
* @param maxFramePayloadLength
* Maximum length of a frame's payload
* @param performMasking
* Whether to mask all written websocket frames. This must be set to true in order to be fully compatible
* with the websocket specifications. Client applications that communicate with a non-standard server
* which doesn't require masking might set this to false to achieve a higher performance.
* @param allowMaskMismatch
* When set to true, frames which are not masked properly according to the standard will still be
* accepted
*/
public WebSocketClientHandshaker08(URI webSocketURL, WebSocketVersion version, String subprotocol,
boolean allowExtensions, HttpHeaders customHeaders, int maxFramePayloadLength,
boolean performMasking, boolean allowMaskMismatch) {
this(webSocketURL, version, subprotocol, allowExtensions, customHeaders, maxFramePayloadLength, performMasking,
allowMaskMismatch, DEFAULT_FORCE_CLOSE_TIMEOUT_MILLIS);
}
/**
* Creates a new instance.
*
* @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 allowExtensions
* Allow extensions to be used in the reserved bits of the web socket frame
* @param customHeaders
* Map of custom headers to add to the client request
* @param maxFramePayloadLength
* Maximum length of a frame's payload
* @param performMasking
* Whether to mask all written websocket frames. This must be set to true in order to be fully compatible
* with the websocket specifications. Client applications that communicate with a non-standard server
* which doesn't require masking might set this to false to achieve a higher performance.
* @param allowMaskMismatch
* When set to true, frames which are not masked properly according to the standard will still be
* accepted
* @param forceCloseTimeoutMillis
* Close the connection if it was not closed by the server after timeout specified.
*/
public WebSocketClientHandshaker08(URI webSocketURL, WebSocketVersion version, String subprotocol,
boolean allowExtensions, HttpHeaders customHeaders, int maxFramePayloadLength,
boolean performMasking, boolean allowMaskMismatch, long forceCloseTimeoutMillis) {
this(webSocketURL, version, subprotocol, allowExtensions, customHeaders, maxFramePayloadLength, performMasking,
allowMaskMismatch, forceCloseTimeoutMillis, false);
}
/**
* Creates a new instance.
*
* @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 allowExtensions
* Allow extensions to be used in the reserved bits of the web socket frame
* @param customHeaders
* Map of custom headers to add to the client request
* @param maxFramePayloadLength
* Maximum length of a frame's payload
* @param performMasking
* Whether to mask all written websocket frames. This must be set to true in order to be fully compatible
* with the websocket specifications. Client applications that communicate with a non-standard server
* which doesn't require masking might set this to false to achieve a higher performance.
* @param allowMaskMismatch
* When set to true, frames which are not masked properly according to the standard will still be
* accepted
* @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
*/
WebSocketClientHandshaker08(URI webSocketURL, WebSocketVersion version, String subprotocol,
boolean allowExtensions, HttpHeaders customHeaders, int maxFramePayloadLength,
boolean performMasking, boolean allowMaskMismatch, long forceCloseTimeoutMillis,
boolean absoluteUpgradeUrl) {
super(webSocketURL, version, subprotocol, customHeaders, maxFramePayloadLength, forceCloseTimeoutMillis,
absoluteUpgradeUrl);
this.allowExtensions = allowExtensions;
this.performMasking = performMasking;
this.allowMaskMismatch = allowMaskMismatch;
}
/**
* /**
*
* Sends the opening request to the server:
*
*
*
* GET /chat HTTP/1.1
* Host: server.example.com
* Upgrade: websocket
* Connection: Upgrade
* Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
* Sec-WebSocket-Origin: http://example.com
* Sec-WebSocket-Protocol: chat, superchat
* Sec-WebSocket-Version: 8
*
*
*/
@Override
protected FullHttpRequest newHandshakeRequest() {
URI wsURL = uri();
// Get 16 bit nonce and base 64 encode it
byte[] nonce = WebSocketUtil.randomBytes(16);
String key = WebSocketUtil.base64(nonce);
String acceptSeed = key + MAGIC_GUID;
byte[] sha1 = WebSocketUtil.sha1(acceptSeed.getBytes(CharsetUtil.US_ASCII));
expectedChallengeResponseString = WebSocketUtil.base64(sha1);
if (logger.isDebugEnabled()) {
logger.debug(
"WebSocket version 08 client handshake key: {}, expected response: {}",
key, expectedChallengeResponseString);
}
// Format request
FullHttpRequest request = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, upgradeUrl(wsURL),
Unpooled.EMPTY_BUFFER);
HttpHeaders headers = request.headers();
if (customHeaders != null) {
headers.add(customHeaders);
if (!headers.contains(HttpHeaderNames.HOST)) {
// Only add HOST header if customHeaders did not contain it.
//
// See https://github.com/netty/netty/issues/10101
headers.set(HttpHeaderNames.HOST, websocketHostValue(wsURL));
}
} else {
headers.set(HttpHeaderNames.HOST, websocketHostValue(wsURL));
}
headers.set(HttpHeaderNames.UPGRADE, HttpHeaderValues.WEBSOCKET)
.set(HttpHeaderNames.CONNECTION, HttpHeaderValues.UPGRADE)
.set(HttpHeaderNames.SEC_WEBSOCKET_KEY, key);
if (!headers.contains(HttpHeaderNames.SEC_WEBSOCKET_ORIGIN)) {
headers.set(HttpHeaderNames.SEC_WEBSOCKET_ORIGIN, websocketOriginValue(wsURL));
}
String expectedSubprotocol = expectedSubprotocol();
if (expectedSubprotocol != null && !expectedSubprotocol.isEmpty()) {
headers.set(HttpHeaderNames.SEC_WEBSOCKET_PROTOCOL, expectedSubprotocol);
}
headers.set(HttpHeaderNames.SEC_WEBSOCKET_VERSION, version().toAsciiString());
return request;
}
/**
*
* Process server response:
*
*
*
* HTTP/1.1 101 Switching Protocols
* Upgrade: websocket
* Connection: Upgrade
* Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=
* Sec-WebSocket-Protocol: chat
*
*
* @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);
}
CharSequence accept = headers.get(HttpHeaderNames.SEC_WEBSOCKET_ACCEPT);
if (accept == null || !accept.equals(expectedChallengeResponseString)) {
throw new WebSocketClientHandshakeException(String.format(
"Invalid challenge. Actual: %s. Expected: %s", accept, expectedChallengeResponseString), response);
}
}
@Override
protected WebSocketFrameDecoder newWebsocketDecoder() {
return new WebSocket08FrameDecoder(false, allowExtensions, maxFramePayloadLength(), allowMaskMismatch);
}
@Override
protected WebSocketFrameEncoder newWebSocketEncoder() {
return new WebSocket08FrameEncoder(performMasking);
}
@Override
public WebSocketClientHandshaker08 setForceCloseTimeoutMillis(long forceCloseTimeoutMillis) {
super.setForceCloseTimeoutMillis(forceCloseTimeoutMillis);
return this;
}
}
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