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timendum/check-gzip.sh

Created July 27, 2011 10:09
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Check if gzip is enabled [ http bash curl ]
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check-gzip.sh
curl -I -H "Accept-Encoding: gzip,deflate" "$URL" --silent | grep -i "Content-Encoding:"
# OR
curl -H "Accept-Encoding: gzip,deflate" "$URL" --silent --write-out "%{size_download}" --output /dev/null
curl "$URL" --silent --write-out "%{size_download}" --output /dev/null
# 2nd must be greater the 1st
@teuf22
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teuf22 commented Oct 9, 2018 •
edited

The first version didn't work for me on some sites. The problem is that -I sends a HEAD request. Some sites may not compress their reply to HEAD even though they have gzip enabled. Another solution is:
curl -sD - -o /dev/null http://example.com
https://stackoverflow.com/a/26644485/960857

@Feriman22
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Feriman22 commented Jun 4, 2020 •
edited

This version is working for me:

curl -H "Accept-Encoding: gzip" -i https://blogginger.com 2>/dev/null

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