top layer of reading files
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text - text/plain
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zip - application/zip
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tar - application/x-tar
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rar - application/vnd.rar
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gz - application/gzip
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bz2 - application/x-bzip2
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7z - application/x-7z-compressed
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xz - application/x-xz
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zstd - application/zstd
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Z - application/x-compress
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iso - application/x-iso9660-image
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lz - application/x-lzip
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a - application/x-unix-archive
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cab - application/vnd.ms-cab-compressed
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docx - application/vnd.openxmlformats-officedocument.wordprocessingml.document
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xlsx - application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
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pdf - application/pdf
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msi - application/x-msi