| // |
| // ======================================================================== |
| // Copyright (c) 1995-2016 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.common.extensions; |
| |
| import static java.nio.file.StandardOpenOption.*; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.SeekableByteChannel; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.Calendar; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.eclipse.jetty.util.IO; |
| import org.eclipse.jetty.util.StringUtil; |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| import org.eclipse.jetty.websocket.api.BatchMode; |
| import org.eclipse.jetty.websocket.api.WebSocketPolicy; |
| import org.eclipse.jetty.websocket.api.WriteCallback; |
| import org.eclipse.jetty.websocket.api.extensions.ExtensionConfig; |
| import org.eclipse.jetty.websocket.api.extensions.Frame; |
| import org.eclipse.jetty.websocket.common.Generator; |
| import org.eclipse.jetty.websocket.common.WebSocketFrame; |
| |
| public class FrameCaptureExtension extends AbstractExtension |
| { |
| private static final Logger LOG = Log.getLogger(FrameCaptureExtension.class); |
| |
| private static final int BUFSIZE = 32768; |
| private Generator generator; |
| private Path outputDir; |
| private String prefix = "frame"; |
| private Path incomingFramesPath; |
| private Path outgoingFramesPath; |
| |
| private AtomicInteger incomingCount = new AtomicInteger(0); |
| private AtomicInteger outgoingCount = new AtomicInteger(0); |
| |
| private SeekableByteChannel incomingChannel; |
| private SeekableByteChannel outgoingChannel; |
| |
| @Override |
| public String getName() |
| { |
| return "@frame-capture"; |
| } |
| |
| @Override |
| public void incomingFrame(Frame frame) |
| { |
| saveFrame(frame,false); |
| try |
| { |
| nextIncomingFrame(frame); |
| } |
| catch (Throwable t) |
| { |
| IO.close(incomingChannel); |
| incomingChannel = null; |
| throw t; |
| } |
| } |
| |
| @Override |
| public void outgoingFrame(Frame frame, WriteCallback callback, BatchMode batchMode) |
| { |
| saveFrame(frame,true); |
| try |
| { |
| nextOutgoingFrame(frame,callback,batchMode); |
| } |
| catch (Throwable t) |
| { |
| IO.close(outgoingChannel); |
| outgoingChannel = null; |
| throw t; |
| } |
| } |
| |
| private void saveFrame(Frame frame, boolean outgoing) |
| { |
| if (outputDir == null || generator == null) |
| { |
| return; |
| } |
| |
| @SuppressWarnings("resource") |
| SeekableByteChannel channel = (outgoing) ? outgoingChannel : incomingChannel; |
| |
| if (channel == null) |
| { |
| return; |
| } |
| |
| ByteBuffer buf = getBufferPool().acquire(BUFSIZE,false); |
| |
| try |
| { |
| WebSocketFrame f = WebSocketFrame.copy(frame); |
| f.setMasked(false); |
| generator.generateHeaderBytes(f,buf); |
| channel.write(buf); |
| if (frame.hasPayload()) |
| { |
| channel.write(frame.getPayload().slice()); |
| } |
| if (LOG.isDebugEnabled()) |
| LOG.debug("Saved {} frame #{}",(outgoing) ? "outgoing" : "incoming", |
| (outgoing) ? outgoingCount.incrementAndGet() : incomingCount.incrementAndGet()); |
| } |
| catch (IOException e) |
| { |
| LOG.warn("Unable to save frame: " + frame,e); |
| } |
| finally |
| { |
| getBufferPool().release(buf); |
| } |
| } |
| |
| @Override |
| public void setConfig(ExtensionConfig config) |
| { |
| super.setConfig(config); |
| |
| String cfgOutputDir = config.getParameter("output-dir",null); |
| if (StringUtil.isNotBlank(cfgOutputDir)) |
| { |
| Path path = new File(cfgOutputDir).toPath(); |
| if (Files.isDirectory(path) && Files.exists(path) && Files.isWritable(path)) |
| { |
| this.outputDir = path; |
| } |
| else |
| { |
| LOG.warn("Unable to configure {}: not a valid output directory",path.toAbsolutePath().toString()); |
| } |
| } |
| |
| String cfgPrefix = config.getParameter("prefix","frame"); |
| if (StringUtil.isNotBlank(cfgPrefix)) |
| { |
| this.prefix = cfgPrefix; |
| } |
| |
| if (this.outputDir != null) |
| { |
| try |
| { |
| Path dir = this.outputDir.toRealPath(); |
| |
| // create a non-validating, read-only generator |
| String tstamp = String.format("%1$tY%1$tm%1$td-%1$tH%1$tM%1$tS",Calendar.getInstance()); |
| incomingFramesPath = dir.resolve(String.format("%s-%s-incoming.dat",this.prefix,tstamp)); |
| outgoingFramesPath = dir.resolve(String.format("%s-%s-outgoing.dat",this.prefix,tstamp)); |
| |
| incomingChannel = Files.newByteChannel(incomingFramesPath,CREATE,WRITE); |
| outgoingChannel = Files.newByteChannel(outgoingFramesPath,CREATE,WRITE); |
| |
| this.generator = new Generator(WebSocketPolicy.newServerPolicy(),getBufferPool(),false,true); |
| } |
| catch (IOException e) |
| { |
| LOG.warn("Unable to create capture file(s)",e); |
| } |
| } |
| } |
| } |