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MIT License
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package org.java_websocket; /* w w w . j av a 2 s.c o m*/ import java.net.InetSocketAddress; 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 default 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 ); public void onWebsocketMessageFragment( WebSocket conn, Framedata frame ); /** * 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. * @throws InvalidDataException thrown when some data that is required to generate the flash-policy like the websocket local port could not be obtained. */ public String getFlashPolicy( WebSocket conn ) throws InvalidDataException; /** 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 ); public InetSocketAddress getLocalSocketAddress( WebSocket conn ); public InetSocketAddress getRemoteSocketAddress( WebSocket conn ); }