C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// # frozen_string_literal: true require "zlib" require "time" # for Time.httpdate module Rack # This middleware enables content encoding of http responses, # usually for purposes of compression. # # Currently supported encodings: # # * gzip # * identity (no transformation) # # This middleware automatically detects when encoding is supported # and allowed. For example no encoding is made when a cache # directive of 'no-transform' is present, when the response status # code is one that doesn't allow an entity body, or when the body # is empty. # # Note that despite the name, Deflater does not support the +deflate+ # encoding. class Deflater (require_relative 'core_ext/regexp'; using ::Rack::RegexpExtensions) if RUBY_VERSION < '2.4' # Creates Rack::Deflater middleware. Options: # # :if :: a lambda enabling / disabling deflation based on returned boolean value # (e.g use Rack::Deflater, :if => lambda { |*, body| sum=0; body.each { |i| sum += i.length }; sum > 512 }). # However, be aware that calling `body.each` inside the block will break cases where `body.each` is not idempotent, # such as when it is an +IO+ instance. # :include :: a list of content types that should be compressed. By default, all content types are compressed. # :sync :: determines if the stream is going to be flushed after every chunk. Flushing after every chunk reduces # latency for time-sensitive streaming applications, but hurts compression and throughput. # Defaults to +true+. def initialize(app, options = {}) @app = app @condition = options[:if] @compressible_types = options[:include] @sync = options.fetch(:sync, true) end def call(env) status, headers, body = @app.call(env) headers = Utils::HeaderHash[headers] unless should_deflate?(env, status, headers, body) return [status, headers, body] end request = Request.new(env) encoding = Utils.select_best_encoding(%w(gzip identity), request.accept_encoding) # Set the Vary HTTP header. vary = headers["Vary"].to_s.split(",").map(&:strip) unless vary.include?("*") || vary.include?("Accept-Encoding") headers["Vary"] = vary.push("Accept-Encoding").join(",") end case encoding when "gzip" headers['Content-Encoding'] = "gzip" headers.delete(CONTENT_LENGTH) mtime = headers["Last-Modified"] mtime = Time.httpdate(mtime).to_i if mtime [status, headers, GzipStream.new(body, mtime, @sync)] when "identity" [status, headers, body] when nil message = "An acceptable encoding for the requested resource #{request.fullpath} could not be found." bp = Rack::BodyProxy.new([message]) { body.close if body.respond_to?(:close) } [406, { CONTENT_TYPE => "text/plain", CONTENT_LENGTH => message.length.to_s }, bp] end end # Body class used for gzip encoded responses. class GzipStream # Initialize the gzip stream. Arguments: # body :: Response body to compress with gzip # mtime :: The modification time of the body, used to set the # modification time in the gzip header. # sync :: Whether to flush each gzip chunk as soon as it is ready. def initialize(body, mtime, sync) @body = body @mtime = mtime @