示例#1
0
  private void fillImageContent() {
    byte[] rawContent = getRawContent();

    // HACK: Detect compressed images.  In reality there should be some way to determine
    //       this from the first 32 bytes, but I can't see any similarity between all the
    //       samples I have obtained, nor any similarity in the data block contents.
    if (matchSignature(rawContent, COMPRESSED1, 32)
        || matchSignature(rawContent, COMPRESSED2, 32)) {
      try {
        InflaterInputStream in =
            new InflaterInputStream(
                new ByteArrayInputStream(rawContent, 33, rawContent.length - 33));
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        byte[] buf = new byte[4096];
        int readBytes;
        while ((readBytes = in.read(buf)) > 0) {
          out.write(buf, 0, readBytes);
        }
        content = out.toByteArray();
      } catch (IOException e) {
        // Problems reading from the actual ByteArrayInputStream should never happen
        // so this will only ever be a ZipException.
        log.log(POILogger.INFO, "Possibly corrupt compression or non-compressed data", e);
      }
    } else {
      // Raw data is not compressed.
      content = rawContent;
    }
  }
 private static String decodeFileName(String encodedUrl) {
   /* see "MICROSOFT OFFICE EXCEL 97-2007  BINARY FILE FORMAT SPECIFICATION" */
   StringBuilder sb = new StringBuilder();
   for (int i = 1; i < encodedUrl.length(); i++) {
     char c = encodedUrl.charAt(i);
     switch (c) {
       case CH_VOLUME:
         char driveLetter = encodedUrl.charAt(++i);
         if (driveLetter == '@') {
           sb.append("\\\\");
         } else {
           // Windows notation for drive letters
           sb.append(driveLetter).append(":");
         }
         break;
       case CH_SAME_VOLUME:
         sb.append(PATH_SEPERATOR);
         break;
       case CH_DOWN_DIR:
         sb.append(PATH_SEPERATOR);
         break;
       case CH_UP_DIR:
         sb.append("..").append(PATH_SEPERATOR);
         break;
       case CH_LONG_VOLUME:
         // Don't known to handle...
         logger.log(POILogger.WARN, "Found unexpected key: ChLongVolume - IGNORING");
         break;
       case CH_STARTUP_DIR:
       case CH_ALT_STARTUP_DIR:
       case CH_LIB_DIR:
         logger.log(POILogger.WARN, "EXCEL.EXE path unkown - using this directoy instead: .");
         sb.append(".").append(PATH_SEPERATOR);
         break;
       default:
         sb.append(c);
     }
   }
   return sb.toString();
 }