Your InputStream was neither an OLE2 stream, nor an OOXML stream

Question

I am using Apache Commons to upload a .docx file in google app engine as explained in this link File upload servlet. While uploading, I also want to extract text by using Apache POI libraries.

If I pass this to the POI API:

 InputStream stream = item.openStream();

I get the below exception:

java.lang.IllegalArgumentException: Your InputStream was neither an OLE2 stream, nor an OOXML stream

public static String docx2text(InputStream is) throws Exception {
    return ExtractorFactory.createExtractor(is).getText();
}

I am uploading a valid .docx document. The POI API works fine if I pass a FileInputStream object.

FileInputStream fs=new FileInputStream(new File("C:\\docs\\mydoc.docx"));

Answer 1

I don't know POI internal implementation, but my guess would be that they need a seekable stream. The streams returned by servlets (and networking in general) aren't seekable.

Try reading the whole contents and then wrapping it in ByteArrayInputStream:

byte[] bytes = getBytes(item.openStream());
InputStream stream = new ByteArrayInputStream(bytes);

public static byte[] getBytes(InputStream is) throws IOException {
    ByteArrayOutputStream buffer = new ByteArrayOutputStream();

    int len;
    byte[] data = new byte[100000];
    while ((len = is.read(data, 0, data.length)) != -1) {
    buffer.write(data, 0, len);
    }

    buffer.flush();
    return buffer.toByteArray();
}

Answer 2

The issue is solved ..

    while (iterator.hasNext()) {  //Apache commons file upload code
      FileItemStream item = iterator.next();
      InputStream stream = item.openStream();
      ByteArrayInputStream bs=new ByteArrayInputStream(IOUtils.toByteArray(stream));
      POITextExtractor extractor = ExtractorFactory.createExtractor(bs); 
      System.out.println(extractor.getText());
    }