Exemplo n.º 1
0
  /**
   * Call this method as the first action in your servlet, to ensure that the files are technically
   * handled, before your business logic takes places. This method should only be invoked for POST
   * calls.
   *
   * @param aRequestScope Current request scope
   * @throws FileUploadException
   */
  public static void handleUpload(@Nonnull final IRequestWebScopeWithoutResponse aRequestScope)
      throws FileUploadException {
    s_aLogger.info("handleUpload");
    // get the upload ID that was sent via a hidden field from the upload frame
    final String sUploadID = aRequestScope.getAttributeAsString(PARAM_UPLOAD_ID);
    if (StringHelper.hasNoText(sUploadID)) {
      FileUploadProgressListener.getInstance().reset();
      throw new FileUploadException("Unable to retrieve upload ID for received request!");
    }

    // Check if we have the matching upload context
    final UploadContext aContext = UploadContextRegistry.getInstance().getContext(sUploadID);
    if (aContext == null) {
      FileUploadProgressListener.getInstance().reset();
      throw new FileUploadException(
          "Unable to retrieve upload context for received request with ID '" + sUploadID + "'!");
    }
    // Ensure that the upload directory exists
    final File aUploadDir = aContext.getUploadDirectory();
    if (!aUploadDir.exists()) {
      final FileIOError aErr = FileOperations.createDirRecursive(aUploadDir);
      if (aErr.isFailure()) {
        FileUploadProgressListener.getInstance().reset();
        throw new FileUploadException(
            "Failed to create upload directory "
                + aUploadDir
                + ": "
                + aErr.toString()); // $NON-NLS-2$
      }
    }

    for (final IFileItem aFileItem : aRequestScope.getAllUploadedFileItemValues()) {
      final File aUploadedFile = _handleUploadFileItem(aFileItem, aContext);
      if (aUploadedFile != null) {
        FileUploadProgressListener.getInstance()
            .setFileName(FilenameHelper.getRelativeToParentDirectory(aUploadedFile, aUploadDir));
      }
    }
    FileUploadProgressListener.getInstance().setUploadFinished();
  }
Exemplo n.º 2
0
  /**
   * Called after successful external validation
   *
   * @param aItem Uploaded file item
   * @param aContext The non-<code>null</code> Upload context
   * @return The file which has been written in on the server, or <code>null</code> in case of an
   *     error
   * @throws FileUploadException
   */
  @Nullable
  private static File _handleUploadFileItem(
      @Nonnull final IFileItem aItem, @Nonnull final UploadContext aContext)
      throws FileUploadException {
    final String sFieldName = aItem.getFieldName();
    final String sSourceFileName = aItem.getName();
    final String sContentType = aItem.getContentType();
    final boolean bInMemory = aItem.isInMemory();
    final long nSizeInBytes = aItem.getSize();
    File aUploadedFile = null;

    s_aLogger.info(
        "Processing file item [field:"
            + sFieldName
            + ", file:"
            + sSourceFileName
            + ", contenttype:"
            + sContentType
            + ", inmemory:"
            + bInMemory
            + ", size:"
            + nSizeInBytes
            + (aContext.getPostProcessor() == null
                ? ""
                : ", post processor "
                    + CGStringHelper.getClassLocalName(aContext.getPostProcessor()))
            + "]");

    // Validate the original filename
    final IUploadFilenameFilter aFilter = aContext.getFilenameFilter();
    if (aFilter != null && !aFilter.matchesFilter(sSourceFileName)) {
      FileUploadProgressListener.getInstance()
          .setFailed(
              aFilter.getErrorCode(),
              aFilter.getErrorMessage(),
              ArrayHelper.newArray(aFilter.getErrorArguments(), String.class));
      final String sMsg =
          "Uploaded file '"
              + sSourceFileName
              + "' does not satisfy the active filename filter!"; //$NON-NLS-2$
      s_aLogger.warn(sMsg);
      throw new FileUploadException(sMsg);
    }

    final IUploadFileSizeFilter aSizeFilter = aContext.getFileSizeFilter();
    if (aSizeFilter != null && !aSizeFilter.matchesFilter(Long.valueOf(nSizeInBytes))) {
      FileUploadProgressListener.getInstance()
          .setFailed(
              EFileUploadText.ERROR_FILESIZE_EXCEEDED.getStringPropertyName(),
              EFileUploadText.ERROR_FILESIZE_EXCEEDED,
              sSourceFileName,
              SizeHelper.getSizeHelperOfLocale(Locale.US)
                  .getAsMatching(aSizeFilter.getMaxBytes(), 2));
      final String sMsg =
          "Uploaded file '"
              + sSourceFileName
              + "' does not satisfy the maximum file size filter!"; //$NON-NLS-2$
      s_aLogger.warn(sMsg);
      throw new FileUploadException(sMsg);
    }

    // Size may be 0 if no file was selected
    if (nSizeInBytes > 0) {
      // Set the post processor only, if a file is present, to avoid endless
      // loops on "post processing file ..."
      final FileUploadProgressListener aProgListener = FileUploadProgressListener.getInstance();
      final IUploadPostProcessor aPostProcessor = aContext.getPostProcessor();
      if (aPostProcessor != null) {
        aProgListener.setPostProcessor(aPostProcessor);
      }
      // Ensure the file does not contain any harmful characters etc.
      final String sFileName = FileUploadHelper.getUnifiedFilename(aItem);
      String sTargetFileName = aContext.getTargetFileName();
      if (StringHelper.hasNoText(sTargetFileName)) {
        sTargetFileName = sFileName;
      }
      final String sTargetDir =
          FilenameHelper.getAbsoluteWithEnsuredParentDirectory(
              aContext.getUploadDirectory(), FilenameHelper.getPath(sTargetFileName));

      // This is the main copy action
      aUploadedFile =
          FileUploadHelper.saveUploadedFile(
              aItem,
              new File(sTargetDir),
              FilenameHelper.getBaseName(sTargetFileName),
              FilenameHelper.getExtension(sTargetFileName));

      if (aUploadedFile == null) {
        // Something went wrong in copying
        s_aLogger.error("Upload failed.");
      } else {
        s_aLogger.info(
            "Upload completed successfully to destination " + aUploadedFile.getAbsolutePath());
        if (aPostProcessor != null) {
          s_aLogger.info("Starting post processing...");
          try {
            aProgListener.setPostProcessing();
            final UploadPostProcessingResult aResult =
                aPostProcessor.performPostProcessing(
                    aUploadedFile, sFileName, aContext.getProperties());
            aProgListener.setPostProcessorResult(aResult);
          } catch (final RuntimeException ex) {
            // Catch any exception
            s_aLogger.error("Internal error in post processing", ex);
            aProgListener.setPostProcessorResult(
                new UploadPostProcessingResult(
                    ESuccess.FAILURE,
                    EFileUploadText.ERROR_POST_PROCESSING,
                    EFileUploadText.ERROR_POST_PROCESSING.getStringPropertyName(),
                    null));
          }
        }
      }
    } else {
      FileUploadProgressListener.getInstance()
          .setFailed(
              EFileUploadText.ERROR_NO_FILE_OR_EMPTY.getStringPropertyName(),
              EFileUploadText.ERROR_NO_FILE_OR_EMPTY);
      final String sMsg =
          "No file or empty file selected: '" + sSourceFileName + "'!"; // $NON-NLS-2$
      s_aLogger.warn(sMsg);
      throw new FileUploadException(sMsg);
    }
    return aUploadedFile;
  }