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https://issues.apache.org/jira/browse/TIKA-689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13084808#comment-13084808
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Joseph Vychtrle commented on TIKA-689:
--------------------------------------
I'm debugging that so I can see that the file is really the ppt document. The
prefix found is [79, 102, 102, 114, 105, 114, 101, 32, 108, 97, 32, 112] which
doesn't make sense, right ?
And you're wrong with the fallback, take a look at MimeTypes.java :
{code}
// Finally, assume plain text if no control bytes are found
for (int i = 0; i < data.length; i++) {
int b = data[i] & 0xFF; // prevent sign extension
if (b < IS_CONTROL_BYTE.length && IS_CONTROL_BYTE[b]) {
return rootMimeType;
}
}
return textMimeType;
{code}
it returns textMimeType, because no control bytes are found...
> MimeTypes detector detects text/plain content type of a PPT file
> ----------------------------------------------------------------
>
> Key: TIKA-689
> URL: https://issues.apache.org/jira/browse/TIKA-689
> Project: Tika
> Issue Type: Bug
> Components: mime
> Affects Versions: 0.9, 1.0
> Reporter: Joseph Vychtrle
> Labels: MimeTypes,
>
> If I create a PPT file like this
> {code}
> import org.apache.poi.hslf.model.Slide;
> import org.apache.poi.hslf.model.TextBox;
> import org.apache.poi.hslf.usermodel.RichTextRun;
> import org.apache.poi.hslf.usermodel.SlideShow;
> private void createPPTDocument(String from, File file) throws Exception
> {
> SlideShow ppt = new SlideShow();
> Slide slide = ppt.createSlide();
> TextBox shape = new TextBox();
> RichTextRun rt = shape.getTextRun().getRichTextRuns()[0];
> shape.setText(from);
> rt.setFontSize(7);
> slide.addShape(shape);
> shape.setAnchor(new java.awt.Rectangle(50, 50, 500, 300));
> //position of the text box in the slide
> slide.addShape(shape);
> FileOutputStream out = new FileOutputStream(file);
> ppt.write(out);
> out.close();
> }
> {code}
> And then :
> {code}
> MediaType mediaType = MediaType.parse(tika.detect(is));
> {code}
> It results in text/plain, MimeTypes detector used, the magic header simply
> doesn't match and then it falls back to text/plain.
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