json: unsupported value: +Inf when indexing files with embedded images that have ExposureTime=0 #3267

getPhoto() in tika.go divides by the parsed exif:ExposureTime value without checking for zero:

When i == 0, this produces +Inf, which causes json.Marshal to fail:

failed to marshal resource: json: error calling MarshalJSON for type *libregraph.Photo: json: unsupported value: +Inf

This happens with files containing embedded images that have default/zeroed EXIF data (e.g. ONLYOFFICE sample PPTX files, where Tika returns exif:ExposureTime: "0.0" for all 8 embedded placeholder images).

The affected file never gets indexed.