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?? body_proxy.rb(1.3 KB)
?? builder.rb(8.56 KB)
?? cascade.rb(2.25 KB)
?? chunked.rb(3.3 KB)
?? common_logger.rb(3.12 KB)
?? conditional_get.rb(2.99 KB)
?? config.rb(410 B)
?? constants.rb(2.47 KB)
?? content_length.rb(806 B)
?? content_type.rb(695 B)
?? deflater.rb(5.51 KB)
?? directory.rb(6.02 KB)
?? etag.rb(1.87 KB)
?? events.rb(4.8 KB)
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?? files.rb(5.66 KB)
?? head.rb(524 B)
?? headers.rb(2.96 KB)
?? lint.rb(36.09 KB)
?? lock.rb(573 B)
?? logger.rb(414 B)
?? media_type.rb(1.4 KB)
?? method_override.rb(1.45 KB)
?? mime.rb(32.69 KB)
?? mock.rb(63 B)
?? mock_request.rb(5.37 KB)
?? mock_response.rb(3.28 KB)
?? multipart
?? multipart.rb(1.17 KB)
?? null_logger.rb(1.18 KB)
?? query_parser.rb(8.37 KB)
?? recursive.rb(1.78 KB)
?? reloader.rb(3.02 KB)
?? request.rb(24.57 KB)
?? response.rb(10.72 KB)
?? rewindable_input.rb(3.12 KB)
?? runtime.rb(870 B)
?? sendfile.rb(5.55 KB)
?? show_exceptions.rb(13.73 KB)
?? show_status.rb(3.58 KB)
?? static.rb(6 KB)
?? tempfile_reaper.rb(778 B)
?? urlmap.rb(2.81 KB)
?? utils.rb(21.1 KB)
?? version.rb(958 B)

Editing: chunked.rb

# frozen_string_literal: true

require_relative 'constants'
require_relative 'utils'

module Rack
  warn "Rack::Chunked is deprecated and will be removed in Rack 3.1", uplevel: 1

# Middleware that applies chunked transfer encoding to response bodies
  # when the response does not include a content-length header.
  #
  # This supports the trailer response header to allow the use of trailing
  # headers in the chunked encoding.  However, using this requires you manually
  # specify a response body that supports a +trailers+ method.  Example:
  #
  #   [200, { 'trailer' => 'expires'}, ["Hello", "World"]]
  #   # error raised
  #
  #   body = ["Hello", "World"]
  #   def body.trailers
  #     { 'expires' => Time.now.to_s }
  #   end
  #   [200, { 'trailer' => 'expires'}, body]
  #   # No exception raised
  class Chunked
    include Rack::Utils

# A body wrapper that emits chunked responses.
    class Body
      TERM = "\r\n"
      TAIL = "0#{TERM}"

# Store the response body to be chunked.
      def initialize(body)
        @body = body
      end

# For each element yielded by the response body, yield
      # the element in chunked encoding.
      def each(&block)
        term = TERM
        @body.each do |chunk|
          size = chunk.bytesize
          next if size == 0

yield [size.to_s(16), term, chunk.b, term].join
        end
        yield TAIL
        yield_trailers(&block)
        yield term
      end

# Close the response body if the response body supports it.
      def close
        @body.close if @body.respond_to?(:close)
      end

private

# Do nothing as this class does not support trailer headers.
      def yield_trailers
      end
    end

# A body wrapper that emits chunked responses and also supports
    # sending Trailer headers.  Note that the response body provided to
    # initialize must have a +trailers+ method that returns a hash
    # of trailer headers, and the rack response itself should have a
    # Trailer header listing the headers that the +trailers+ method
    # will return.
    class TrailerBody < Body
      private

# Yield strings for each trailer header.
      def yield_trailers
        @body.trailers.each_pair do |k, v|
          yield "#{k}: #{v}\r\n"
        end
      end
    end

def initialize(app)
      @app = app
    end

# Whether the HTTP version supports chunked encoding (HTTP 1.1 does).
    def chunkable_version?(ver)
      case ver
      # pre-HTTP/1.0 (informally "HTTP/0.9") HTTP requests did not have
      # a version (nor response headers)
      when 'HTTP/1.0', nil, 'HTTP/0.9'
        false
      else
        true
      end
    end

# If the rack app returns a response that should have a body,
    # but does not have content-length or transfer-encoding headers,
    # modify the response to use chunked transfer-encoding.
    def call(env)
      status, headers, body = response = @app.call(env)

if chunkable_version?(env[SERVER_PROTOCOL]) &&
         !STATUS_WITH_NO_ENTITY_BODY.key?(status.to_i) &&
         !headers[CONTENT_LENGTH] &&
         !headers[TRANSFER_ENCODING]

headers[TRANSFER_ENCODING] = 'chunked'
        if headers['trailer']
          response[2] = TrailerBody.new(body)
        else
          response[2] = Body.new(body)
        end
      end

response
    end
  end
end

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Editing: chunked.rb

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