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https://issues.apache.org/jira/browse/TIKA-1033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15224907#comment-15224907
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Tim Allison commented on TIKA-1033:
-----------------------------------
I re-discovered this roughly a year ago on TIKA-1651. :) The # of parse
exceptions on embedded xls files was crazily higher than un-embedded xls...and
then I discovered that they really weren't xls.
On POI 54213, Yegor (who actually knows what he's talking about) confirmed my
suspicions in looking into the file format with POI. This is a very different
type of file from XLS. I did some investigatory hackery to modify the read
lengths on POI and I could see some data, but it looks like it'll take a fair
amount of effort to add parsing for this without breaking XLS parsing.
As a first step, we could follow Yegor's
[recommendation|https://bz.apache.org/bugzilla/show_bug.cgi?id=54213#c4] and
add detection at least via inspection of the container. What mime type do we
want to use? {{application/ms-chart}}?
> Tika doesn't parse embedded OLE Chart/Graph objects
> ---------------------------------------------------
>
> Key: TIKA-1033
> URL: https://issues.apache.org/jira/browse/TIKA-1033
> Project: Tika
> Issue Type: Bug
> Components: parser
> Reporter: Michael McCandless
> Priority: Minor
> Attachments: emb.ppt
>
>
> I have an example ppt that embeds a chart, but Tika mis-identifies it
> as an XLS document.
> The progID (oleShape.getProgID() in
> HSLFExtractor.handleSlideEmbeddedResources) is MSGraph.Chart.8 ... and
> we seem to detect it as Excel (application/vnd.ms-excel) but then the
> ExcelExtractor hits this exception:
> {noformat}
> org.apache.poi.hssf.record.RecordFormatException: Unable to construct record
> instance
> at
> org.apache.poi.hssf.record.RecordFactory$ReflectionConstructorRecordCreator.create(RecordFactory.java:65)
> at
> org.apache.poi.hssf.record.RecordFactory.createSingleRecord(RecordFactory.java:301)
> at
> org.apache.poi.hssf.record.RecordFactoryInputStream.readNextRecord(RecordFactoryInputStream.java:285)
> at
> org.apache.poi.hssf.record.RecordFactoryInputStream.nextRecord(RecordFactoryInputStream.java:251)
> at
> org.apache.poi.hssf.eventusermodel.HSSFEventFactory.genericProcessEvents(HSSFEventFactory.java:143)
> at
> org.apache.poi.hssf.eventusermodel.HSSFEventFactory.processEvents(HSSFEventFactory.java:106)
> at
> org.apache.tika.parser.microsoft.ExcelExtractor$TikaHSSFListener.processFile(ExcelExtractor.java:302)
> at
> org.apache.tika.parser.microsoft.ExcelExtractor.parse(ExcelExtractor.java:147)
> {noformat}
> Since DelegatingParser silently suppresses all exceptions, when you
> run TikaCLI you won't see any exception nor text extracted, but if you
> run with -z, it will save 1.xls which if you then try to parse with
> TikaCLI hits the above exception.
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