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https://issues.apache.org/jira/browse/TIKA-4223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17830607#comment-17830607
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Robin Schimpf commented on TIKA-4223:
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If I understand the Wikipedia article correct the ASCII file has to start with
"solid". The text afterwards is the model name. So this would be flexible.
Also the "OpenSCAD Model" in the binary file seems to be the model name.
Wikipedia mentions a header of 80 bytes but there seems to be no magic bytes
present for detection. So maybe the only way would be the file ending?
> STL file exported with OpenSCAD not detected correctly
> ------------------------------------------------------
>
> Key: TIKA-4223
> URL: https://issues.apache.org/jira/browse/TIKA-4223
> Project: Tika
> Issue Type: Improvement
> Affects Versions: 2.9.1
> Reporter: Robin Schimpf
> Priority: Major
> Attachments: linear_extrude_ascii.stl, linear_extrude_binary.stl
>
>
> STL files can be in ASCII or in binary format. Exporting this file
> ([https://github.com/openscad/openscad/blob/master/examples/Basics/linear_extrude.scad)]
> with OpenSCAD into STL the ASCII result file is detected as text/plain.
> Also the binary STL is detected with application/vnd.ms-pki.stl which differs
> from the model/stl mime-type Wikipedia lists for those files.
>
> Used commands for attached files
> {code:java}
> openscad.exe --export-format asciistl -o result\linear_extrude_ascii.stl
> examples\Basics\linear_extrude.scad {code}
> {code:java}
> openscad.exe --export-format binstl -o result\linear_extrude_binary.stl
> examples\Basics\linear_extrude.scad
> {code}
> Refs:
> https://en.wikipedia.org/wiki/STL_(file_format)
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