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require 'faraday'
module FaradayMiddleware
# Middleware to automatically decompress response bodies. If the
# "Accept-Encoding" header wasn't set in the request, this sets it to
# "gzip,deflate" and appropriately handles the compressed response from the
# server. This resembles what Ruby 1.9+ does internally in Net::HTTP#get.
#
# This middleware is NOT necessary when these adapters are used:
# - net_http on Ruby 1.9+
# - net_http_persistent on Ruby 2.0+
# - em_http
class Gzip < Faraday::Middleware
dependency 'zlib'
ACCEPT_ENCODING = 'Accept-Encoding'.freeze
CONTENT_ENCODING = 'Content-Encoding'.freeze
CONTENT_LENGTH = 'Content-Length'.freeze
SUPPORTED_ENCODINGS = 'gzip,deflate'.freeze
RUBY_ENCODING = '1.9'.respond_to?(:force_encoding)
def call(env)
env[:request_headers][ACCEPT_ENCODING] ||= SUPPORTED_ENCODINGS
@app.call(env).on_complete do |response_env|
case response_env[:response_headers][CONTENT_ENCODING]
when 'gzip'
reset_body(response_env, &method(:uncompress_gzip))
when 'deflate'
reset_body(response_env, &method(:inflate))
end
end
end
def reset_body(env)
env[:body] = yield(env[:body])
env[:response_headers].delete(CONTENT_ENCODING)
env[:response_headers][CONTENT_LENGTH] = env[:body].length
end
def uncompress_gzip(body)
io = StringIO.new(body)
gzip_reader = if RUBY_ENCODING
Zlib::GzipReader.new(io, :encoding => 'ASCII-8BIT')
else
Zlib::GzipReader.new(io)
end
gzip_reader.read
end
def inflate(body)
# Inflate as a DEFLATE (RFC 1950+RFC 1951) stream
Zlib::Inflate.inflate(body)
rescue Zlib::DataError
# Fall back to inflating as a "raw" deflate stream which
# Microsoft servers return
inflate = Zlib::Inflate.new(-Zlib::MAX_WBITS)
begin
inflate.inflate(body)
ensure
inflate.close
end
end
end
end
Version data entries
5 entries across 5 versions & 3 rubygems