org.jboss.netty.handler.codec.http.websocketx

Class WebSocketServerHandshaker00

java.lang.Object

org.jboss.netty.handler.codec.http.websocketx.WebSocketServerHandshaker

org.jboss.netty.handler.codec.http.websocketx.WebSocketServerHandshaker00

public class WebSocketServerHandshaker00
extends WebSocketServerHandshaker

Performs server 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.

Field Summary

Fields inherited from class org.jboss.netty.handler.codec.http.websocketx.WebSocketServerHandshaker

HANDSHAKE_LISTENER, SUB_PROTOCOL_WILDCARD

Constructor Summary

Constructors

Constructor and Description
WebSocketServerHandshaker00(String webSocketURL, String subprotocols) Constructor with default values
WebSocketServerHandshaker00(String webSocketURL, String subprotocols, long maxFramePayloadLength) Constructor specifying the destination web socket location

Method Summary

Methods

Modifier and Type	Method and Description
ChannelFuture	close(Channel channel, CloseWebSocketFrame frame) Echo back the closing frame
ChannelFuture	handshake(Channel channel, HttpRequest req) Handle the web socket handshake for the web socket specification HyBi version 0 and lower.

Methods inherited from class org.jboss.netty.handler.codec.http.websocketx.WebSocketServerHandshaker

getMaxFramePayloadLength, getSelectedSubprotocol, getSubprotocols, getVersion, getWebSocketUrl, selectSubprotocol, setSelectedSubprotocol

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WebSocketServerHandshaker00

public WebSocketServerHandshaker00(String webSocketURL,
                           String subprotocols)

Constructor with default values

Parameters:

webSocketURL - URL for web socket communications. e.g "ws://myhost.com/mypath". Subsequent web socket frames will be sent to this URL.

subprotocols - CSV of supported protocols

WebSocketServerHandshaker00

public WebSocketServerHandshaker00(String webSocketURL,
                           String subprotocols,
                           long maxFramePayloadLength)

Constructor specifying the destination web socket location

Parameters:

webSocketURL - URL for web socket communications. e.g "ws://myhost.com/mypath". Subsequent web socket frames will be sent to this URL.

subprotocols - CSV of supported protocols

maxFramePayloadLength - Maximum allowable frame payload length. Setting this value to your application's requirement may reduce denial of service attacks using long data frames.

Method Detail

handshake

public ChannelFuture handshake(Channel channel,
                      HttpRequest req)

Handle the web socket handshake for the web socket specification HyBi version 0 and lower. This standard is really a rehash of hixie-76 and hixie-75.

Browser request to the server:

 GET /demo HTTP/1.1
 Upgrade: WebSocket
 Connection: Upgrade
 Host: example.com
 Origin: http://example.com
 Sec-WebSocket-Protocol: chat, sample
 Sec-WebSocket-Key1: 4 @1  46546xW%0l 1 5
 Sec-WebSocket-Key2: 12998 5 Y3 1  .P00

 ^n:ds[4U
 

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-
 

Specified by:

handshake in class WebSocketServerHandshaker

Parameters:

channel - Channel

req - HTTP request

close

public ChannelFuture close(Channel channel,
                  CloseWebSocketFrame frame)

Echo back the closing frame

Specified by:

close in class WebSocketServerHandshaker

Parameters:

channel - Channel

frame - Web Socket frame that was received