This file is indexed.

/usr/lib/ruby/1.9.1/webrick/httpserver.rb is in libruby1.9.1 1.9.3.0-1ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
#
# httpserver.rb -- HTTPServer Class
#
# Author: IPR -- Internet Programming with Ruby -- writers
# Copyright (c) 2000, 2001 TAKAHASHI Masayoshi, GOTOU Yuuzou
# Copyright (c) 2002 Internet Programming with Ruby writers. All rights
# reserved.
#
# $IPR: httpserver.rb,v 1.63 2002/10/01 17:16:32 gotoyuzo Exp $

require 'webrick/server'
require 'webrick/httputils'
require 'webrick/httpstatus'
require 'webrick/httprequest'
require 'webrick/httpresponse'
require 'webrick/httpservlet'
require 'webrick/accesslog'

module WEBrick
  class HTTPServerError < ServerError; end

  ##
  # An HTTP Server

  class HTTPServer < ::WEBrick::GenericServer
    ##
    # Creates a new HTTP server according to +config+
    #
    # An HTTP server uses the following attributes:
    #
    # :AccessLog:: An array of access logs.  See WEBrick::AccessLog
    # :BindAddress:: Local address for the server to bind to
    # :DocumentRoot:: Root path to serve files from
    # :DocumentRootOptions:: Options for the default HTTPServlet::FileHandler
    # :HTTPVersion:: The HTTP version of this server
    # :Port:: Port to listen on
    # :RequestCallback:: Called with a request and response before each
    #                    request is serviced.
    # :RequestTimeout:: Maximum time to wait between requests
    # :ServerAlias:: Array of alternate names for this server for virtual
    #                hosting
    # :ServerName:: Name for this server for virtual hosting

    def initialize(config={}, default=Config::HTTP)
      super(config, default)
      @http_version = HTTPVersion::convert(@config[:HTTPVersion])

      @mount_tab = MountTable.new
      if @config[:DocumentRoot]
        mount("/", HTTPServlet::FileHandler, @config[:DocumentRoot],
              @config[:DocumentRootOptions])
      end

      unless @config[:AccessLog]
        @config[:AccessLog] = [
          [ $stderr, AccessLog::COMMON_LOG_FORMAT ],
          [ $stderr, AccessLog::REFERER_LOG_FORMAT ]
        ]
      end

      @virtual_hosts = Array.new
    end

    ##
    # Processes requests on +sock+

    def run(sock)
      while true
        res = HTTPResponse.new(@config)
        req = HTTPRequest.new(@config)
        server = self
        begin
          timeout = @config[:RequestTimeout]
          while timeout > 0
            break if IO.select([sock], nil, nil, 0.5)
            timeout = 0 if @status != :Running
            timeout -= 0.5
          end
          raise HTTPStatus::EOFError if timeout <= 0
          raise HTTPStatus::EOFError if sock.eof?
          req.parse(sock)
          res.request_method = req.request_method
          res.request_uri = req.request_uri
          res.request_http_version = req.http_version
          res.keep_alive = req.keep_alive?
          server = lookup_server(req) || self
          if callback = server[:RequestCallback]
            callback.call(req, res)
          elsif callback = server[:RequestHandler]
            msg = ":RequestHandler is deprecated, please use :RequestCallback"
            @logger.warn(msg)
            callback.call(req, res)
          end
          server.service(req, res)
        rescue HTTPStatus::EOFError, HTTPStatus::RequestTimeout => ex
          res.set_error(ex)
        rescue HTTPStatus::Error => ex
          @logger.error(ex.message)
          res.set_error(ex)
        rescue HTTPStatus::Status => ex
          res.status = ex.code
        rescue StandardError => ex
          @logger.error(ex)
          res.set_error(ex, true)
        ensure
          if req.request_line
            if req.keep_alive? && res.keep_alive?
              req.fixup()
            end
            res.send_response(sock)
            server.access_log(@config, req, res)
          end
        end
        break if @http_version < "1.1"
        break unless req.keep_alive?
        break unless res.keep_alive?
      end
    end

    ##
    # Services +req+ and fills in +res+

    def service(req, res)
      if req.unparsed_uri == "*"
        if req.request_method == "OPTIONS"
          do_OPTIONS(req, res)
          raise HTTPStatus::OK
        end
        raise HTTPStatus::NotFound, "`#{req.unparsed_uri}' not found."
      end

      servlet, options, script_name, path_info = search_servlet(req.path)
      raise HTTPStatus::NotFound, "`#{req.path}' not found." unless servlet
      req.script_name = script_name
      req.path_info = path_info
      si = servlet.get_instance(self, *options)
      @logger.debug(format("%s is invoked.", si.class.name))
      si.service(req, res)
    end

    def do_OPTIONS(req, res)
      res["allow"] = "GET,HEAD,POST,OPTIONS"
    end

    ##
    # Mounts +servlet+ on +dir+ passing +options+ to the servlet at creation
    # time

    def mount(dir, servlet, *options)
      @logger.debug(sprintf("%s is mounted on %s.", servlet.inspect, dir))
      @mount_tab[dir] = [ servlet, options ]
    end

    ##
    # Mounts +proc+ or +block+ on +dir+ and calls it with a
    # WEBrick::HTTPRequest and WEBrick::HTTPResponse

    def mount_proc(dir, proc=nil, &block)
      proc ||= block
      raise HTTPServerError, "must pass a proc or block" unless proc
      mount(dir, HTTPServlet::ProcHandler.new(proc))
    end

    ##
    # Unmounts +dir+

    def unmount(dir)
      @logger.debug(sprintf("unmount %s.", dir))
      @mount_tab.delete(dir)
    end
    alias umount unmount

    ##
    # Finds a servlet for +path+

    def search_servlet(path)
      script_name, path_info = @mount_tab.scan(path)
      servlet, options = @mount_tab[script_name]
      if servlet
        [ servlet, options, script_name, path_info ]
      end
    end

    ##
    # Adds +server+ as a virtual host.

    def virtual_host(server)
      @virtual_hosts << server
      @virtual_hosts = @virtual_hosts.sort_by{|s|
        num = 0
        num -= 4 if s[:BindAddress]
        num -= 2 if s[:Port]
        num -= 1 if s[:ServerName]
        num
      }
    end

    ##
    # Finds the appropriate virtual host to handle +req+

    def lookup_server(req)
      @virtual_hosts.find{|s|
        (s[:BindAddress].nil? || req.addr[3] == s[:BindAddress]) &&
        (s[:Port].nil?        || req.port == s[:Port])           &&
        ((s[:ServerName].nil?  || req.host == s[:ServerName]) ||
         (!s[:ServerAlias].nil? && s[:ServerAlias].find{|h| h === req.host}))
      }
    end

    def access_log(config, req, res)
      param = AccessLog::setup_params(config, req, res)
      @config[:AccessLog].each{|logger, fmt|
        logger << AccessLog::format(fmt+"\n", param)
      }
    end

    class MountTable
      def initialize
        @tab = Hash.new
        compile
      end

      def [](dir)
        dir = normalize(dir)
        @tab[dir]
      end

      def []=(dir, val)
        dir = normalize(dir)
        @tab[dir] = val
        compile
        val
      end

      def delete(dir)
        dir = normalize(dir)
        res = @tab.delete(dir)
        compile
        res
      end

      def scan(path)
        @scanner =~ path
        [ $&, $' ]
      end

      private

      def compile
        k = @tab.keys
        k.sort!
        k.reverse!
        k.collect!{|path| Regexp.escape(path) }
        @scanner = Regexp.new("^(" + k.join("|") +")(?=/|$)")
      end

      def normalize(dir)
        ret = dir ? dir.dup : ""
        ret.sub!(%r|/+$|, "")
        ret
      end
    end
  end
end