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Editorial Team
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Asked: 2026-05-26T13:42:18+00:00

My server can store files with *.pdf extension. Should I check the file format

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My server can store files with *.pdf extension.
Should I check the file format or right extension is enough?

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  1. Editorial Team

    Thanks a lot, Bob! Your solution is great. I parse remote file, and change your reg exp a bit:

    file_url = 'http://...../file_name.pdf'
file = open(file_url)
contents = file.read(10)
is_pdf = (contents =~ /\%PDF-\d+\.?\d+/) == 0
render :text => is_pdf
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