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| author | Cătălin Mariș <alrraa@gmail.com> | 2013-12-07 22:17:46 +0200 |
|---|---|---|
| committer | Mathias Bynens <mathias@qiwi.be> | 2013-12-08 14:51:05 +0100 |
| commit | e20538715d3daf0e11ab1482abda2d0063833c99 (patch) | |
| tree | 08829b17e8b9243bf787768430dfea50d7bb15f2 /bin | |
| parent | 5cdfccf8f5ea35d90034ebca0dfd1e140bf580fc (diff) | |
| download | dotfiles-e20538715d3daf0e11ab1482abda2d0063833c99.tar.gz dotfiles-e20538715d3daf0e11ab1482abda2d0063833c99.tar.bz2 dotfiles-e20538715d3daf0e11ab1482abda2d0063833c99.zip | |
bin: Make `httpcompression` prevent caching
In some cases, intermediate proxies ignore the `Content-Encoding` header
altogether.
Sending `Cache-Control no-cache` as a request header solves this problem
by forcing validation of the resources in the intermediate proxies,
thereby, ensuring that every request is fetched from the origin server.
Ref. alrra/dotfiles#2. Closes #308.
Diffstat (limited to 'bin')
| -rwxr-xr-x | bin/httpcompression | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/bin/httpcompression b/bin/httpcompression index 444f719..9f5163c 100755 --- a/bin/httpcompression +++ b/bin/httpcompression @@ -2,8 +2,21 @@ # Test if HTTP compression (RFC 2616 + SDCH) is enabled for a given URL -declare -r hUA="Mozilla/5.0 Gecko" +# Useful Links: +# +# - HTTP/1.1 (RFC 2616) - Content Codings: +# http://tools.ietf.org/html/rfc2616#section-3.5 +# +# - SDCH Specification: +# http://www.blogs.zeenor.com/wp-content/uploads/2011/01/Shared_Dictionary_Compression_over_HTTP.pdf + +# Usage: +# +# httpcompression URL + declare -r hAE="Accept-Encoding: gzip, deflate, sdch" +declare -r hCC="Cache-Control: no-cache" +declare -r hUA="Mozilla/5.0 Gecko" declare -r maxConTime=15 declare -r maxTime=30 @@ -11,13 +24,14 @@ declare availDicts="" dict="" dictClientID="" dicts="" headers="" i="" \ indent="" url="" encoding="" urlHeaders="" headers="$( curl --connect-timeout $maxConTime \ - -A "$hUA" `# Send a fake UA string for sites - # that sniff it instead of using - # the Accept-Encoding header` \ + -A "$hUA" `# Send a fake UA string for sites that sniff it + # instead of using the Accept-Encoding header` \ -D - `# Get response headers` \ -H "$hAE" \ - -L `# If the page was moved to a different - # location, redo the request` \ + -H "$hCC" `# Prevent intermediate proxies from caching the + # response` \ + -L `# If the page was moved to a different location, + # redo the request` \ -m $maxTime \ -s `# Don\'t show the progress meter` \ -S `# Show error messages` \ |