| /******************************************************************************* |
| * Copyright (c) 2007, 2008 IBM Corporation and Others |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Hisashi MIYASHITA - initial API and implementation |
| * Kentarou FUKUDA - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.actf.model.internal.flash.proxy; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.PrintStream; |
| import java.io.PushbackInputStream; |
| |
| import org.eclipse.actf.model.flash.transcoder.ISwfTranscoder; |
| import org.eclipse.actf.model.flash.transcoder.ISwfTranscoderFactory; |
| import org.eclipse.actf.model.internal.flash.bridge.WaXcodingConfig; |
| import org.eclipse.actf.util.httpproxy.core.IHTTPHeader; |
| import org.eclipse.actf.util.httpproxy.core.IHTTPRequestMessage; |
| import org.eclipse.actf.util.httpproxy.core.IHTTPResponseMessage; |
| import org.eclipse.actf.util.httpproxy.core.IHTTPResponsePushbackMessage; |
| import org.eclipse.actf.util.httpproxy.core.IPushbackMessageBody; |
| import org.eclipse.actf.util.httpproxy.core.TimeoutException; |
| import org.eclipse.actf.util.httpproxy.proxy.IHTTPProxyTranscoder; |
| import org.eclipse.actf.util.httpproxy.util.HTTPUtil; |
| import org.eclipse.actf.util.httpproxy.util.Logger; |
| |
| public class ProxyTranscoderSWF implements IHTTPProxyTranscoder { |
| private static final Logger LOGGER = Logger.getLogger(ProxyTranscoderSWF.class); |
| |
| private static ISwfTranscoderFactory getSwfTranscoderFactory() { |
| try { |
| // TODO: maybe we should rename the factory package. |
| Class<?> clazz = Class |
| .forName("org.eclipse.actf.util.swftranscoder.SwfTranscoderFactory"); //$NON-NLS-1$ |
| return (ISwfTranscoderFactory) clazz.newInstance(); |
| } catch (Exception e) { |
| } |
| return null; |
| } |
| |
| private static final ISwfTranscoderFactory swfTranscoderFactory = getSwfTranscoderFactory(); |
| |
| private final ISwfTranscoder swfTranscoder; |
| |
| private ProxyTranscoderSWF(int id) { |
| this.swfTranscoder = swfTranscoderFactory.newInstance(id); |
| } |
| |
| protected static ProxyTranscoderSWF newInstance(int id) { |
| if (swfTranscoderFactory == null) |
| return null; |
| return new ProxyTranscoderSWF(id); |
| } |
| |
| private static Object imposedSWF; |
| |
| public static void setSWFTranscodingImposedFile(InputStream is) { |
| if (swfTranscoderFactory == null) |
| return; |
| ISwfTranscoder st = swfTranscoderFactory.newInstance(0); |
| try { |
| imposedSWF = st.parse(is); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| private File getTemporaryDestSWF(File src) throws IOException { |
| return new File(src.getAbsolutePath() + ".out"); //$NON-NLS-1$ |
| } |
| |
| private File getTemporarySrcSWF() throws IOException { |
| return File.createTempFile("SWFTC-", ".swf"); //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| |
| private boolean isTranscodeTarget(int id, IHTTPRequestMessage request, |
| IHTTPResponsePushbackMessage response) { |
| if (request.getHeader(SWFUtil.X_FLASH_VERSION_A) == null) |
| return false; |
| if (!SWFUtil.isPossiblySWFContentType(response)) |
| return false; |
| |
| IPushbackMessageBody body = response.getPushbackMessageBody(); |
| if (body == null) |
| return false; |
| PushbackInputStream bodyInputStream = body |
| .getMessageBodyPushBackInputStream(); |
| int version = SWFUtil.isSWF(bodyInputStream); |
| // |
| if (version >= WaXcodingConfig.getInstance() |
| .getSWFTranscodingMinimumVersion()) { |
| LOGGER.info("[id:" + id + "] SWTTranscoder: SWF to be transcoded (" //$NON-NLS-1$ //$NON-NLS-2$ |
| + request.getOriginalRequestURIString() + ")- Version:" //$NON-NLS-1$ |
| + version); |
| return true; |
| } else { |
| if (version > 0) |
| LOGGER.info("[id:" + id //$NON-NLS-1$ |
| + "] SWTTranscoder: SWF not to be transcoded (" //$NON-NLS-1$ |
| + request.getOriginalRequestURIString() + ")- Version:" //$NON-NLS-1$ |
| + version); |
| return false; |
| } |
| } |
| |
| private void outputFailureLog(StringBuffer buf, IHTTPRequestMessage request, |
| File outFile, Throwable e) { |
| buf.append("("); //$NON-NLS-1$ |
| buf.append(request.getOriginalRequestURIString()); |
| buf.append(")\n"); //$NON-NLS-1$ |
| buf.append(stackTraceToString(e)); |
| if (LOGGER.isDebugEnabled() && (outFile != null)) { |
| buf.append("The SWF file is secured in "); //$NON-NLS-1$ |
| buf.append(outFile.getAbsolutePath()); |
| buf.append("\n"); //$NON-NLS-1$ |
| } |
| LOGGER.fatal(buf.toString()); |
| } |
| |
| private File saveSWFFile(File f, byte[] target) throws IOException { |
| FileOutputStream os = null; |
| try { |
| os = new FileOutputStream(f); |
| os.write(target); |
| return f; |
| } finally { |
| if (os != null) { |
| os.close(); |
| } |
| } |
| } |
| |
| private String stackTraceToString(Throwable t) { |
| ByteArrayOutputStream os = new ByteArrayOutputStream(); |
| PrintStream ps = new PrintStream(os); |
| t.printStackTrace(ps); |
| return os.toString(); |
| } |
| |
| public IHTTPResponseMessage transcode(int id, IHTTPRequestMessage request, |
| IHTTPResponseMessage response) { |
| if (!WaXcodingConfig.getInstance().getSWFTranscodingFlag()) |
| return response; |
| if (imposedSWF == null) |
| return response; |
| IHTTPResponsePushbackMessage newResponse = HTTPUtil.createHTTPResponsePushbackMessage( |
| response, SWFUtil.FLASH_MAGIC_NUMBER_SIZE); |
| |
| if (!isTranscodeTarget(id, request, newResponse)) |
| return newResponse; |
| |
| byte[] transcoded; |
| File srcSWFFile = null; |
| File destSWFFile = null; |
| try { |
| srcSWFFile = getTemporarySrcSWF(); |
| byte[] targetBytes; |
| try { |
| targetBytes = newResponse.readBody(0, false); |
| } catch (TimeoutException e) { |
| LOGGER.fatal("[id:" + id //$NON-NLS-1$ |
| + "] Message body cannot be read by timeout."); //$NON-NLS-1$ |
| // This should be integrated with sendGatewayTimeout... |
| return HTTPUtil.createHTTPResponseInMemoryMessage(request.getSerial(), |
| IHTTPHeader.HTTP_VERSION_1_0_A, "504".getBytes(), //$NON-NLS-1$ |
| "Gateway Timeout".getBytes(), //$NON-NLS-1$ |
| IHTTPResponseMessage.EMPTY_BODY); |
| } |
| if (targetBytes == null) |
| return response; |
| |
| if (LOGGER.isDebugEnabled()) { |
| saveSWFFile(srcSWFFile, targetBytes); |
| } |
| Object srcSwf = swfTranscoder.parse(new ByteArrayInputStream( |
| targetBytes)); |
| Object destSwf = swfTranscoder.impose(imposedSWF, srcSwf); |
| transcoded = swfTranscoder.generate(destSwf, false, 8); |
| |
| destSWFFile = getTemporaryDestSWF(srcSWFFile); |
| if (LOGGER.isDebugEnabled()) { |
| saveSWFFile(destSWFFile, transcoded); |
| } |
| } catch (IOException e) { |
| e.printStackTrace(); |
| return response; |
| } catch (Exception e) { |
| StringBuffer buf = new StringBuffer("SWF transcoding failed "); //$NON-NLS-1$ |
| outputFailureLog(buf, request, srcSWFFile, e); |
| return response; |
| } |
| |
| IHTTPResponseMessage msg = HTTPUtil.createHTTPResponseInMemoryMessage( |
| response, transcoded); |
| return msg; |
| } |
| } |