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Versions: 13
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Contents
require 'zlib'
require 'stringio'
module Webmachine
class Resource
# This module implements standard Content-Encodings that you might
# want to use in your {Resource}. To use one, simply return it in
# the hash from {Callbacks#encodings_provided}.
module Encodings
# The 'identity' encoding, which does no compression.
def encode_identity(data)
data
end
# The 'deflate' encoding, which uses libz's DEFLATE compression.
def encode_deflate(data)
# The deflate options were borrowed from Rack and Mongrel1.
Zlib::Deflate.deflate(data, *[Zlib::DEFAULT_COMPRESSION,
# drop the zlib header which causes both Safari and IE to choke
-Zlib::MAX_WBITS,
Zlib::DEF_MEM_LEVEL,
Zlib::DEFAULT_STRATEGY
])
end
# The 'gzip' encoding, which uses GNU Zip (via libz).
# @note Because of the header/checksum requirements, gzip cannot
# be used on streamed responses.
def encode_gzip(data)
"".tap do |out|
Zlib::GzipWriter.wrap(StringIO.new(out)){|gz| gz << data }
end
end
end # module Encodings
end # class Resource
end # module Webmachine
Version data entries
13 entries across 12 versions & 1 rubygems