Exemplo n.º 1
0
  // fix for 4720897
  // if the jar file resides in a war file, download it to a temp dir
  // so it can be used to generate jardiff
  private String getRealPath(String path) throws IOException {

    URL fileURL = _servletContext.getResource(path);

    File tempDir = (File) _servletContext.getAttribute("javax.servlet.context.tempdir");

    // download file into temp dir
    if (fileURL != null) {
      File newFile = File.createTempFile("temp", ".jar", tempDir);
      if (download(fileURL, newFile)) {
        String filePath = newFile.getPath();
        return filePath;
      }
    }
    return null;
  }
Exemplo n.º 2
0
  /** Initialize JarDiff handler */
  public JarDiffHandler(ServletContext servletContext, Logger log) {
    _jarDiffEntries = new HashMap();
    _servletContext = servletContext;
    _log = log;

    _jarDiffMimeType = _servletContext.getMimeType("xyz.jardiff");
    if (_jarDiffMimeType == null) _jarDiffMimeType = JARDIFF_MIMETYPE;
  }
Exemplo n.º 3
0
  private File generateJarDiff(
      ResourceCatalog catalog,
      DownloadRequest dreq,
      JnlpResource res,
      boolean doJarDiffWorkAround) {
    boolean del_old = false;
    boolean del_new = false;

    // Lookup up file for request version
    DownloadRequest fromDreq = dreq.getFromDownloadRequest();
    try {
      JnlpResource fromRes = catalog.lookupResource(fromDreq);

      /* Get file locations */
      String newFilePath = _servletContext.getRealPath(res.getPath());
      String oldFilePath = _servletContext.getRealPath(fromRes.getPath());

      // fix for 4720897
      if (newFilePath == null) {
        newFilePath = getRealPath(res.getPath());
        if (newFilePath != null) del_new = true;
      }

      if (oldFilePath == null) {
        oldFilePath = getRealPath(fromRes.getPath());
        if (oldFilePath != null) del_old = true;
      }

      if (newFilePath == null || oldFilePath == null) {
        return null;
      }

      // Create temp. file to store JarDiff file in
      File tempDir = (File) _servletContext.getAttribute("javax.servlet.context.tempdir");

      // fix for 4653036: JarDiffHandler() should use javax.servlet.context.tempdir to store the
      // jardiff
      File outputFile = File.createTempFile("jnlp", ".jardiff", tempDir);

      _log.addDebug(
          "Generating Jardiff between "
              + oldFilePath
              + " and "
              + newFilePath
              + " Store in "
              + outputFile);

      // Generate JarDiff
      OutputStream os = new FileOutputStream(outputFile);

      JarDiff.createPatch(oldFilePath, newFilePath, os, !doJarDiffWorkAround);
      os.close();

      try {

        // Check that Jardiff is smaller, or return null
        if (outputFile.length() >= (new File(newFilePath).length())) {
          _log.addDebug("JarDiff discarded - since it is bigger");
          return null;
        }

        // Check that Jardiff is smaller than the packed version of
        // the new file, if the file exists at all
        File newFilePacked = new File(newFilePath + ".pack.gz");
        if (newFilePacked.exists()) {
          _log.addDebug("generated jardiff size: " + outputFile.length());
          _log.addDebug("packed requesting file size: " + newFilePacked.length());
          if (outputFile.length() >= newFilePacked.length()) {
            _log.addDebug("JarDiff discarded - packed version of requesting file is smaller");
            return null;
          }
        }

        _log.addDebug("JarDiff generation succeeded");
        return outputFile;

      } finally {
        // delete the temporarily downloaded file
        if (del_new) {
          new File(newFilePath).delete();
        }

        if (del_old) {
          new File(oldFilePath).delete();
        }
      }
    } catch (IOException ioe) {
      _log.addDebug("Failed to genereate jardiff", ioe);
      return null;
    } catch (ErrorResponseException ere) {
      _log.addDebug("Failed to genereate jardiff", ere);
      return null;
    }
  }