| // |
| // ======================================================================== |
| // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.websocket; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| public class FragmentExtension extends AbstractExtension |
| { |
| private int _maxLength=-1; |
| private int _minFragments=1; |
| |
| public FragmentExtension() |
| { |
| super("fragment"); |
| } |
| |
| @Override |
| public boolean init(Map<String, String> parameters) |
| { |
| if(super.init(parameters)) |
| { |
| _maxLength=getInitParameter("maxLength",_maxLength); |
| _minFragments=getInitParameter("minFragments",_minFragments); |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void addFrame(byte flags, byte opcode, byte[] content, int offset, int length) throws IOException |
| { |
| if (getConnection().isControl(opcode)) |
| { |
| super.addFrame(flags,opcode,content,offset,length); |
| return; |
| } |
| |
| int fragments=1; |
| |
| while (_maxLength>0 && length>_maxLength) |
| { |
| fragments++; |
| super.addFrame((byte)(flags&~getConnection().finMask()),opcode,content,offset,_maxLength); |
| length-=_maxLength; |
| offset+=_maxLength; |
| opcode=getConnection().continuationOpcode(); |
| } |
| |
| while (fragments<_minFragments) |
| { |
| int frag=length/2; |
| fragments++; |
| super.addFrame((byte)(flags&0x7),opcode,content,offset,frag); |
| length-=frag; |
| offset+=frag; |
| opcode=getConnection().continuationOpcode(); |
| } |
| |
| super.addFrame((byte)(flags|getConnection().finMask()),opcode,content,offset,length); |
| } |
| |
| |
| } |