31 lines
1.1 KiB
Ruby
31 lines
1.1 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Utils
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module Gzip
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def gzip_compress(data)
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# .compress returns ASCII-8BIT, so we need to force the encoding to
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# UTF-8 before caching it in redis, else we risk encoding mismatch
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# errors.
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#
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ActiveSupport::Gzip.compress(data).force_encoding("UTF-8")
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rescue Zlib::GzipFile::Error
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data
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end
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def gzip_decompress(data)
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# Since we could be dealing with an already populated cache full of data
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# that isn't gzipped, we want to also check to see if the data is
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# gzipped before we attempt to .decompress it, thus we check the first
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# 2 bytes for "\x1F\x8B" to confirm it is a gzipped string. While a
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# non-gzipped string will raise a Zlib::GzipFile::Error, which we're
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# rescuing, we don't want to count on rescue for control flow.
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#
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data[0..1] == "\x1F\x8B" ? ActiveSupport::Gzip.decompress(data) : data
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rescue Zlib::GzipFile::Error
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data
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end
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end
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end
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end
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