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144 lines (127 loc) · 5.47 KB
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package org.java_websocket;
import java.nio.ByteBuffer;
import org.java_websocket.drafts.Draft;
import org.java_websocket.exceptions.InvalidDataException;
import org.java_websocket.framing.Framedata;
import org.java_websocket.handshake.ClientHandshake;
import org.java_websocket.handshake.Handshakedata;
import org.java_websocket.handshake.ServerHandshake;
import org.java_websocket.handshake.ServerHandshakeBuilder;
/**
* Implemented by <tt>WebSocketClient</tt> and <tt>WebSocketServer</tt>.
* The methods within are called by <tt>WebSocket</tt>.
* Almost every method takes a first parameter conn which represents the source of the respective event.
*/
public interface WebSocketListener {
/**
* Called on the server side when the socket connection is first established, and the WebSocket
* handshake has been received. This method allows to deny connections based on the received handshake.<br>
* By behavior this method only requires protocol compliance.
*
* @param conn
* The WebSocket related to this event
* @param draft
* The protocol draft the client uses to connect
* @param request
* The opening http message send by the client. Can be used to access additional fields like cookies.
* @return Returns an incomplete handshake containing all optional fields
* @throws InvalidDataException
* Throwing this exception will cause this handshake to be rejected
*/
public ServerHandshakeBuilder onWebsocketHandshakeReceivedAsServer( WebSocket conn, Draft draft, ClientHandshake request ) throws InvalidDataException;
/**
* Called on the client side when the socket connection is first established, and the WebSocketImpl
* handshake response has been received.
*
* @param conn
* The WebSocket related to this event
* @param request
* The handshake initially send out to the server by this websocket.
* @param response
* The handshake the server sent in response to the request.
* @throws InvalidDataException
* Allows the client to reject the connection with the server in respect of its handshake response.
*/
public void onWebsocketHandshakeReceivedAsClient( WebSocket conn, ClientHandshake request, ServerHandshake response ) throws InvalidDataException;
/**
* Called on the client side when the socket connection is first established, and the WebSocketImpl
* handshake has just been sent.
*
* @param conn
* The WebSocket related to this event
* @param request
* The handshake sent to the server by this websocket
* @throws InvalidDataException
* Allows the client to stop the connection from progressing
*/
public void onWebsocketHandshakeSentAsClient( WebSocket conn, ClientHandshake request ) throws InvalidDataException;
/**
* Called when an entire text frame has been received. Do whatever you want
* here...
*
* @param conn
* The <tt>WebSocket</tt> instance this event is occurring on.
* @param message
* The UTF-8 decoded message that was received.
*/
public void onWebsocketMessage( WebSocket conn, String message );
/**
* Called when an entire binary frame has been received. Do whatever you want
* here...
*
* @param conn
* The <tt>WebSocket</tt> instance this event is occurring on.
* @param blob
* The binary message that was received.
*/
public void onWebsocketMessage( WebSocket conn, ByteBuffer blob );
/**
* Called after <var>onHandshakeReceived</var> returns <var>true</var>.
* Indicates that a complete WebSocket connection has been established,
* and we are ready to send/receive data.
*
* @param conn
* The <tt>WebSocket</tt> instance this event is occuring on.
*/
public void onWebsocketOpen( WebSocket conn, Handshakedata d );
/**
* Called after <tt>WebSocket#close</tt> is explicity called, or when the
* other end of the WebSocket connection is closed.
*
* @param conn
* The <tt>WebSocket</tt> instance this event is occuring on.
*/
public void onWebsocketClose( WebSocket ws, int code, String reason, boolean remote );
/** called as soon as no further frames are accepted */
public void onWebsocketClosing( WebSocket ws, int code, String reason, boolean remote );
/** send when this peer sends a close handshake */
public void onWebsocketCloseInitiated( WebSocket ws, int code, String reason );
/**
* Called if an exception worth noting occurred.
* If an error causes the connection to fail onClose will be called additionally afterwards.
*
* @param ex
* The exception that occurred. <br>
* Might be null if the exception is not related to any specific connection. For example if the server port could not be bound.
*/
public void onWebsocketError( WebSocket conn, Exception ex );
/**
* Called a ping frame has been received.
* This method must send a corresponding pong by itself.
*
* @param f
* The ping frame. Control frames may contain payload.
*/
public void onWebsocketPing( WebSocket conn, Framedata f );
/**
* Called when a pong frame is received.
**/
public void onWebsocketPong( WebSocket conn, Framedata f );
/**
* Gets the XML string that should be returned if a client requests a Flash
* security policy.
*/
public String getFlashPolicy( WebSocket conn );
/** This method is used to inform the selector thread that there is data queued to be written to the socket. */
public void onWriteDemand( WebSocket conn );
}