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?? ..
?? auth
?? backports
?? body_proxy.rb(958 B)
?? builder.rb(4.27 KB)
?? cascade.rb(1.34 KB)
?? chunked.rb(1.58 KB)
?? commonlogger.rb(2.28 KB)
?? conditionalget.rb(2.5 KB)
?? config.rb(379 B)
?? content_length.rb(840 B)
?? content_type.rb(670 B)
?? deflater.rb(4.57 KB)
?? directory.rb(4.2 KB)
?? etag.rb(2.11 KB)
?? file.rb(4.09 KB)
?? handler
?? handler.rb(3.24 KB)
?? head.rb(484 B)
?? lint.rb(29.26 KB)
?? lobster.rb(1.97 KB)
?? lock.rb(601 B)
?? logger.rb(357 B)
?? methodoverride.rb(972 B)
?? mime.rb(30.89 KB)
?? mock.rb(5.68 KB)
?? multipart
?? multipart.rb(1.14 KB)
?? nulllogger.rb(951 B)
?? recursive.rb(1.73 KB)
?? reloader.rb(2.97 KB)
?? request.rb(12.45 KB)
?? response.rb(4.33 KB)
?? rewindable_input.rb(3.19 KB)
?? runtime.rb(961 B)
?? sendfile.rb(5.18 KB)
?? server.rb(10.8 KB)
?? session
?? showexceptions.rb(11.7 KB)
?? showstatus.rb(3.46 KB)
?? static.rb(4.87 KB)
?? tempfile_reaper.rb(670 B)
?? urlmap.rb(2.46 KB)
?? utils
?? utils.rb(20.55 KB)

Editing: file.rb

require 'time'
require 'rack/utils'
require 'rack/mime'

module Rack
  # Rack::File serves files below the +root+ directory given, according to the
  # path info of the Rack request.
  # e.g. when Rack::File.new("/etc") is used, you can access 'passwd' file
  # as http://localhost:9292/passwd
  #
  # Handlers can detect if bodies are a Rack::File, and use mechanisms
  # like sendfile on the +path+.

class File
    ALLOWED_VERBS = %w[GET HEAD OPTIONS]
    ALLOW_HEADER = ALLOWED_VERBS.join(', ')

attr_accessor :root
    attr_accessor :path
    attr_accessor :cache_control

alias :to_path :path

def initialize(root, headers={}, default_mime = 'text/plain')
      @root = root
      @headers = headers
      @default_mime = default_mime
    end

def call(env)
      dup._call(env)
    end

F = ::File

def _call(env)
      unless ALLOWED_VERBS.include? env[REQUEST_METHOD]
        return fail(405, "Method Not Allowed", {'Allow' => ALLOW_HEADER})
      end

path_info = Utils.unescape(env[PATH_INFO])
      clean_path_info = Utils.clean_path_info(path_info)

@path = F.join(@root, clean_path_info)

available = begin
        F.file?(@path) && F.readable?(@path)
      rescue SystemCallError
        false
      end

if available
        serving(env)
      else
        fail(404, "File not found: #{path_info}")
      end
    end

def serving(env)
      if env["REQUEST_METHOD"] == "OPTIONS"
        return [200, {'Allow' => ALLOW_HEADER, CONTENT_LENGTH => '0'}, []]
      end
      last_modified = F.mtime(@path).httpdate
      return [304, {}, []] if env['HTTP_IF_MODIFIED_SINCE'] == last_modified

headers = { "Last-Modified" => last_modified }
      headers[CONTENT_TYPE] = mime_type if mime_type

# Set custom headers
      @headers.each { |field, content| headers[field] = content } if @headers

response = [ 200, headers, env[REQUEST_METHOD] == "HEAD" ? [] : self ]

size = filesize

ranges = Rack::Utils.byte_ranges(env, size)
      if ranges.nil? || ranges.length > 1
        # No ranges, or multiple ranges (which we don't support):
        # TODO: Support multiple byte-ranges
        response[0] = 200
        @range = 0..size-1
      elsif ranges.empty?
        # Unsatisfiable. Return error, and file size:
        response = fail(416, "Byte range unsatisfiable")
        response[1]["Content-Range"] = "bytes */#{size}"
        return response
      else
        # Partial content:
        @range = ranges[0]
        response[0] = 206
        response[1]["Content-Range"] = "bytes #{@range.begin}-#{@range.end}/#{size}"
        size = @range.end - @range.begin + 1
      end

response[2] = [response_body] unless response_body.nil?

response[1][CONTENT_LENGTH] = size.to_s
      response
    end

def each
      F.open(@path, "rb") do |file|
        file.seek(@range.begin)
        remaining_len = @range.end-@range.begin+1
        while remaining_len > 0
          part = file.read([8192, remaining_len].min)
          break unless part
          remaining_len -= part.length

yield part
        end
      end
    end

private

def fail(status, body, headers = {})
      body += "\n"
      [
        status,
        {
          CONTENT_TYPE   => "text/plain",
          CONTENT_LENGTH => body.size.to_s,
          "X-Cascade" => "pass"
        }.merge!(headers),
        [body]
      ]
    end

# The MIME type for the contents of the file located at @path
    def mime_type
      Mime.mime_type(F.extname(@path), @default_mime)
    end

def filesize
      # If response_body is present, use its size.
      return Rack::Utils.bytesize(response_body) if response_body

#   We check via File::size? whether this file provides size info
      #   via stat (e.g. /proc files often don't), otherwise we have to
      #   figure it out by reading the whole file into memory.
      F.size?(@path) || Utils.bytesize(F.read(@path))
    end

# By default, the response body for file requests is nil.
    # In this case, the response body will be generated later
    # from the file at @path
    def response_body
      nil
    end
  end
end

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