summaryrefslogtreecommitdiff
path: root/lib/net/http.rb
blob: 3900ed6c6824154a7aa717ea999a6f5f4fa88eff (plain)
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
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
=begin

= net/http.rb version 1.1.32

maintained by Minero Aoki <aamine@dp.u-netsurf.ne.jp>
This file is derived from "http-access.rb".

This program is free software.
You can distribute/modify this program under
the terms of the Ruby Distribute License.

Japanese version of this document is in "net" full package.
You can get it from RAA
(Ruby Application Archive: http://www.ruby-lang.org/en/raa.html).


= class HTTP

== Class Methods

: new( address = 'localhost', port = 80, proxy_addr = nil, proxy_port = nil )
  creates a new Net::HTTP object.
  If proxy_addr is given, this method is equals to
  Net::HTTP::Proxy(proxy_addr,proxy_port).

: start( address = 'localhost', port = 80, proxy_addr = nil, proxy_port = nil )
: start( address = 'localhost', port = 80, proxy_addr = nil, proxy_port = nil ) {|http| .... }
  is equals to
    Net::HTTP.new( address, port, proxy_addr, proxy_port ).start(&block)

: Proxy( address, port )
  creates a HTTP proxy class.
  Arguments are address/port of proxy host.
  You can replace HTTP class by this proxy class.

    # example
    proxy_http = HTTP::Proxy( 'proxy.foo.org', 8080 )
      :
    proxy_http.start( 'www.ruby-lang.org' ) do |http|
      # connecting proxy.foo.org:8080
      :
    end

: proxy_class?
  If self is HTTP, false.
  If self is a class which was created by HTTP::Proxy(), true.

: port
  HTTP default port (80).


== Methods

: start
: start {|http| .... }
  creates a new Net::HTTP object and starts HTTP session.

  When this method is called with block, gives a HTTP object to block
  and close HTTP session after returning from the block.

: proxy?
  true if self is a HTTP proxy class

: proxy_address
  address of proxy host. If self is not a proxy, nil.

: proxy_port
  port number of proxy host. If self is not a proxy, nil.

: get( path, header = nil, dest = '' )
: get( path, header = nil ) {|str| .... }
  get data from "path" on connecting host.
  "header" must be a Hash like { 'Accept' => '*/*', ... }.
  Data is written to "dest" by using "<<" method.
  This method returns Net::HTTPResponse object, and "dest".

    # example
    response, body = http.get( '/index.html' )

  If called with block, give a part String of entity body.

  Note:
  If status is not 2xx(success), ProtocolError exception is
  raised. At that time, you can get HTTPResponse object from 
  exception object. (same in head/post)

    # example
    begin
      response, body = http.get( '/index.html' )
    rescue Net::ProtoRetriableError => err
      response = err.data
      ...
    end

: head( path, header = nil )
  gets only header from "path" on connecting host.
  "header" is a Hash like { 'Accept' => '*/*', ... }.
  This method returns a Net::HTTPResponse object.
  You can http header from this object like:

    response['content-length']   #-> '2554'
    response['content-type']     #-> 'text/html'
    response['Content-Type']     #-> 'text/html'
    response['CoNtEnT-tYpe']     #-> 'text/html'

: post( path, data, header = nil, dest = '' )
: post( path, data, header = nil ) {|str| .... }
  posts "data" (must be String now) to "path".
  If the body exists, also gets entity body.
  Data is written to "dest" by using "<<" method.
  "header" must be a Hash like { 'Accept' => '*/*', ... }.
  This method returns Net::HTTPResponse object and "dest".

  If called with block, gives a part of entity body string.

: get2( path, header = nil )
: get2( path, header = nil ) {|recv| .... }
  send GET request for "path".
  "header" must be a Hash like { 'Accept' => '*/*', ... }.
  If this method is called with block, one gives
  a HTTPResponseReceiver object to block.

    # example
    http.get2( '/index.html' ) do |recv|
      # "recv" is a HTTPResponseReceiver object
      recv.header
      recv.body
    end

    # another way
    response = http.get2( '/index.html' )
    response['content-type']
    response.body

    # this is wrong
    http.get2( '/index.html' ) do |recv|
      print recv.response.body   # body is not read yet!!!
    end

    # but this is ok
    http.get2( '/index.html' ) do |recv|
      recv.body                  # read body and set recv.response.body
      print recv.response.body   # ref
    end

: head2( path, header = nil )
: head2( path, header = nil ) {|recv| .... }
  send HEAD request for "path".
  "header" must be a Hash like { 'Accept' => 'text/html', ... }.
  The difference between "head" method is that
  "head2" does not raise exceptions.

  If this method is called with block, one gives
  a HTTPResponseReceiver object to block.

    # example
    response = http.head2( '/index.html' )

    # another way
    http.head2( '/index.html' ) do |recv|
      recv.response
    end

: post2( path, data, header = nil )
: post2( path, data, header = nil ) {|recv| .... }
  posts "data" (must be String now) to "path".
  "header" must be a Hash like { 'Accept' => '*/*', ... }.
  If this method is called with block, one gives
  a HTTPResponseReceiver object to block.

    # example
    http.post2( '/anycgi.rb', 'data data data...' ) do |recv|
      # "recv" is a HTTPResponseReceiver object
      recv.header
      recv.body
    end

    # another way
    response = http.post2( '/anycgi.rb', 'important data' )
    response['content-type']
    response.body


= class HTTPResponse

HTTP response object.
All "key" is case-insensitive.

== Methods

: body
  the entity body. ("dest" argument for HTTP#get, post, put)

: self[ key ]
  returns header field for "key".
  for HTTP, value is a string like 'text/plain'(for Content-Type),
  '2045'(for Content-Length), 'bytes 0-1024/10024'(for Content-Range).
  Multiple header had be joined by HTTP1.1 scheme.

: self[ key ] = val
  set field value for "key".

: key?( key )
  true if key exists

: each {|name,value| .... }
  iterates for each field name and value pair

: code
  HTTP result code string. For example, '302'

: message
  HTTP result message. For example, 'Not Found'


= class HTTPResponseReceiver

== Methods

: header
: response
  Net::HTTPResponse object

: body( dest = '' )
: entity( dest = '' )
  entity body. A body is written to "dest" using "<<" method.

: body {|str| ... }
  gets entity body with block.
  If this method is called twice, block is not executed and
  returns first "dest".


= http.rb version 1.2 features

You can use 1.2 features by calling HTTP.version_1_2. And
calling Net::HTTP.version_1_1 allows to use 1.1 features.

  # example
  HTTP.start {|http1| ...(http1 has 1.1 features)... }

  HTTP.version_1_2
  HTTP.start {|http2| ...(http2 has 1.2 features)... }

  HTTP.version_1_1
  HTTP.start {|http3| ...(http3 has 1.1 features)... }

== Method (only diff to 1.1)

: get( path, u_header = nil )
: get( path, u_header = nil ) {|str| .... }
  gets document from "path".
  returns HTTPResponse object.

: head( path, u_header = nil )
  gets only document header from "path".
  returns HTTPResponse object.

: post( path, data, u_header = nil )
: post( path, data, u_header = nil ) {|str| .... }
  posts "data" to "path" entity and gets document.
  returns HTTPResponse object.

=end

require 'net/protocol'


module Net

  class HTTPBadResponse < StandardError; end


  class HTTP < Protocol

    protocol_param :port,         '80'
    protocol_param :command_type, '::Net::NetPrivate::HTTPCommand'


    ###
    ### proxy
    ###

    class << self

      def Proxy( p_addr, p_port = nil )
        ::Net::NetPrivate::HTTPProxy.create_proxy_class(
            p_addr, p_port || self.port )
      end

      alias orig_new new

      def new( address = nil, port = nil, p_addr = nil, p_port = nil )
        c = p_addr ? self::Proxy(p_addr, p_port) : self
        i = c.orig_new( address, port )
        setimplv i
        i
      end

      def start( address = nil, port = nil, p_addr = nil, p_port = nil, &block )
        new( address, port, p_addr, p_port ).start( &block )
      end

      def proxy_class?
        false
      end

      def proxy_address
        nil
      end

      def proxy_port
        nil
      end

    end

    def proxy?
      false
    end

    def proxy_address
      nil
    end

    def proxy_port
      nil
    end

    def edit_path( path )
      path
    end


    ###
    ### 1.2 implementation
    ###

    @@newimpl = false

    #class << self

      def self.version_1_2
        @@newimpl = true
      end

      def self.version_1_1
        @@newimpl = false
      end

      #private

      def self.setimplv( obj )
        f = @@newimpl
        obj.instance_eval { @newimpl = f }
      end

    #end


    ###
    ### http operations
    ###

    def get( path, u_header = nil, dest = nil, &block )
      resp = get2( path, u_header ) {|f| f.body( dest, &block ) }
      if @newimpl then
        resp
      else
        resp.value
        return resp, resp.body
      end
    end

    def get2( path, u_header = nil, &block )
      common_oper( u_header, true, block ) {|uh|
        @command.get edit_path(path), uh
      }
    end


    def head( path, u_header = nil )
      resp = head2( path, u_header )
      unless @newimpl then
        resp.value
      end
      resp
    end

    def head2( path, u_header = nil, &block )
      common_oper( u_header, false, block ) {|uh|
        @command.head edit_path(path), uh
      }
    end


    def post( path, data, u_header = nil, dest = nil, &block )
      resp = post2( path, data, u_header ) {|f| f.body( dest, &block ) }
      if @newimpl then
        resp
      else
        resp.value
        return resp, resp.body
      end
    end

    def post2( path, data, u_header = nil, &block )
      common_oper( u_header, true, block ) {|uh|
        @command.post edit_path(path), uh, data
      }
    end


    # not tested because I could not setup apache  (__;;;
    def put( path, src, u_header = nil )
      resp = put2( path, src, u_header ) {|f| f.body }
      if @newimpl then
        resp
      else
        resp.value
        return resp, resp.body
      end
    end

    def put2( path, src, u_header = nil, &block )
      common_oper( u_header, true, block ) {|uh|
        @command.put path, uh, src
      }
    end


    private


    def common_oper( u_header, body_exist, block )
      header = procheader( u_header )
      recv = err = nil

      connecting( header ) {
        recv = HTTPResponseReceiver.new( @command, body_exist )
        yield header
        begin
          block.call recv if block
        rescue Exception => err
          ;
        end
        recv.terminate

        recv.response
      }
      raise err if err

      recv.response
    end

    def connecting( header )
      if not @socket then
        header['Connection'] = 'close'
        start
      elsif @socket.closed? then
        @socket.reopen
      end

      resp = yield

      unless keep_alive? header, resp then
        @socket.close
      end
    end

    def keep_alive?( header, resp )
      if resp.key? 'connection' then
        if /keep-alive/i === resp['connection'] then
          return true
        end
      elsif resp.key? 'proxy-connection' then
        if /keep-alive/i === resp['proxy-connection'] then
          return true
        end
      elsif header.key? 'Connection' then
        if /keep-alive/i === header['Connection'] then
          return true
        end
      else
        if @command.http_version == '1.1' then
          return true
        end
      end

      false
    end

    def procheader( h )
      ret = {}
      ret[ 'Host' ]       = address +
                            ((port == HTTP.port) ? '' : ":#{port}")
      ret[ 'Connection' ] = 'Keep-Alive'
      ret[ 'Accept' ]     = '*/*'

      return ret unless h
      tmp = {}
      h.each do |k,v|
        key = k.split('-').collect {|i| i.capitalize }.join('-')
        if tmp[key] then
          $stderr.puts "'#{key}' http header appered twice" if $VERBOSE
        end
        tmp[key] = v
      end
      ret.update tmp

      ret
    end


    def do_finish
    end

  end

  HTTPSession = HTTP


  module NetPrivate

  module HTTPProxy

    class << self

      def create_proxy_class( p_addr, p_port )
        klass = Class.new( HTTP )
        klass.module_eval {
          include HTTPProxy
          @proxy_address = p_addr
          @proxy_port    = p_port
        }
        def klass.proxy_class?
          true
        end

        def klass.proxy_address
          @proxy_address
        end

        def klass.proxy_port
          @proxy_port
        end

        klass
      end

    end


    def initialize( addr, port )
      super
      @proxy_address = type.proxy_address
      @proxy_port    = type.proxy_port
    end

    attr_reader :proxy_address, :proxy_port

    alias proxyaddr proxy_address
    alias proxyport proxy_port

    def proxy?
      true
    end
  
    def connect( addr = nil, port = nil )
      super @proxy_address, @proxy_port
    end

    def edit_path( path )
      'http://' + address + (port == type.port ? '' : ":#{port}") + path
    end
  
  end

  end   # net private



  class HTTPResponseReceiver

    def initialize( command, body_exist )
      @command = command
      @body_exist = body_exist
      @header = @body = nil
    end

    def inspect
      "#<#{type}>"
    end

    def read_header
      unless @header then
        stream_check
        @header = @command.get_response
      end
      @header
    end

    alias header read_header
    alias response read_header

    def read_body( dest = nil, &block )
      unless @body then
        read_header

        to = procdest( dest, block )
        stream_check

        if @body_exist and @header.code_type.body_exist? then
          @command.get_body @header, to
          @header.body = @body = to
        else
          @command.no_body
          @header.body = nil
          @body = 1
        end
      end
      @body == 1 ? nil : @body
    end

    alias body read_body
    alias entity read_body

    def terminate
      read_header
      read_body
      @command = nil
    end


    private

    def stream_check
      unless @command then
        raise IOError, 'receiver was used out of block'
      end
    end

    def procdest( dest, block )
      if dest and block then
        raise ArgumentError,
          'both of arg and block are given for HTTP method'
      end
      if block then
        NetPrivate::ReadAdapter.new block
      else
        dest or ''
      end
    end

  end

  HTTPReadAdapter = HTTPResponseReceiver


  class HTTPResponse < Response

    def initialize( code_type, code, msg )
      super
      @data = {}
      @body = nil
    end

    attr_accessor :body

    def inspect
      "#<#{type.name} #{code}>"
    end

    def []( key )
      @data[ key.downcase ]
    end

    def []=( key, val )
      @data[ key.downcase ] = val
    end

    def each( &block )
      @data.each( &block )
    end

    def each_key( &block )
      @data.each_key( &block )
    end

    def each_value( &block )
      @data.each_value( &block )
    end

    def delete( key )
      @data.delete key.downcase
    end

    def key?( key )
      @data.key? key.downcase
    end

    def to_hash
      @data.dup
    end

    def value
      unless SuccessCode === self then
        error! self
      end
    end

  end


  class Code

    def http_mkchild( bodyexist = nil )
      c = mkchild(nil)
      be = if bodyexist.nil? then @body_exist else bodyexist end
      c.instance_eval { @body_exist = be }
      c
    end

    def body_exist?
      @body_exist
    end
  
  end

  HTTPInformationCode               = InformationCode.http_mkchild( false )
  HTTPSuccessCode                   = SuccessCode    .http_mkchild( true )
  HTTPRedirectionCode               = RetriableCode  .http_mkchild( true )
  HTTPRetriableCode = HTTPRedirectionCode
  HTTPClientErrorCode               = FatalErrorCode .http_mkchild( true )
  HTTPFatalErrorCode = HTTPClientErrorCode
  HTTPServerErrorCode               = ServerErrorCode.http_mkchild( true )


  HTTPSwitchProtocol                = HTTPInformationCode.http_mkchild

  HTTPOK                            = HTTPSuccessCode.http_mkchild
  HTTPCreated                       = HTTPSuccessCode.http_mkchild
  HTTPAccepted                      = HTTPSuccessCode.http_mkchild
  HTTPNonAuthoritativeInformation   = HTTPSuccessCode.http_mkchild
  HTTPNoContent                     = HTTPSuccessCode.http_mkchild( false )
  HTTPResetContent                  = HTTPSuccessCode.http_mkchild( false )
  HTTPPartialContent                = HTTPSuccessCode.http_mkchild

  HTTPMultipleChoice                = HTTPRedirectionCode.http_mkchild
  HTTPMovedPermanently              = HTTPRedirectionCode.http_mkchild
  HTTPMovedTemporarily              = HTTPRedirectionCode.http_mkchild
  HTTPNotModified                   = HTTPRedirectionCode.http_mkchild( false )
  HTTPUseProxy                      = HTTPRedirectionCode.http_mkchild( false )
  
  HTTPBadRequest                    = HTTPClientErrorCode.http_mkchild
  HTTPUnauthorized                  = HTTPClientErrorCode.http_mkchild
  HTTPPaymentRequired               = HTTPClientErrorCode.http_mkchild
  HTTPForbidden                     = HTTPClientErrorCode.http_mkchild
  HTTPNotFound                      = HTTPClientErrorCode.http_mkchild
  HTTPMethodNotAllowed              = HTTPClientErrorCode.http_mkchild
  HTTPNotAcceptable                 = HTTPClientErrorCode.http_mkchild
  HTTPProxyAuthenticationRequired   = HTTPClientErrorCode.http_mkchild
  HTTPRequestTimeOut                = HTTPClientErrorCode.http_mkchild
  HTTPConflict                      = HTTPClientErrorCode.http_mkchild
  HTTPGone                          = HTTPClientErrorCode.http_mkchild
  HTTPLengthRequired                = HTTPClientErrorCode.http_mkchild
  HTTPPreconditionFailed            = HTTPClientErrorCode.http_mkchild
  HTTPRequestEntityTooLarge         = HTTPClientErrorCode.http_mkchild
  HTTPRequestURITooLarge            = HTTPClientErrorCode.http_mkchild
  HTTPUnsupportedMediaType          = HTTPClientErrorCode.http_mkchild

  HTTPNotImplemented                = HTTPServerErrorCode.http_mkchild
  HTTPBadGateway                    = HTTPServerErrorCode.http_mkchild
  HTTPServiceUnavailable            = HTTPServerErrorCode.http_mkchild
  HTTPGatewayTimeOut                = HTTPServerErrorCode.http_mkchild
  HTTPVersionNotSupported           = HTTPServerErrorCode.http_mkchild


  module NetPrivate


  class HTTPCommand < Command

    HTTPVersion = '1.1'

    def initialize( sock )
      @http_version = HTTPVersion
      super sock
    end

    attr_reader :http_version

    def inspect
      "#<Net::HTTPCommand>"
    end


    ###
    ### request
    ###

    public

    def get( path, u_header )
      return unless begin_critical
      request sprintf('GET %s HTTP/%s', path, HTTPVersion), u_header
    end
      
    def head( path, u_header )
      return unless begin_critical
      request sprintf('HEAD %s HTTP/%s', path, HTTPVersion), u_header
    end

    def post( path, u_header, data )
      return unless begin_critical
      u_header[ 'Content-Length' ] = data.size.to_s
      request sprintf('POST %s HTTP/%s', path, HTTPVersion), u_header
      @socket.write data
    end

    def put( path, u_header, src )
      return unless begin_critical
      request sprintf('PUT %s HTTP/%s', path, HTTPVersion), u_header
      @socket.write_bin src
    end

    # def delete

    # def trace

    # def options

    def quit
    end


    private

    def request( req, u_header )
      @socket.writeline req
      u_header.each do |n,v|
        @socket.writeline n + ': ' + v
      end
      @socket.writeline ''
    end


    ###
    ### response line & header
    ###

    public

    def get_response
      resp = get_resp0
      resp = get_resp0 while ContinueCode === resp
      resp
    end


    private

    def get_resp0
      resp = get_reply

      while true do
        line = @socket.readline
        break if line.empty?

        m = /\A([^:]+):\s*/.match( line )
        unless m then
          raise HTTPBadResponse, 'wrong header line format'
        end
        nm = m[1]
        line = m.post_match
        if resp.key? nm then
          resp[nm] << ', ' << line
        else
          resp[nm] = line
        end
      end

      resp
    end

    def get_reply
      str = @socket.readline
      m = /\AHTTP\/(\d+\.\d+)?\s+(\d\d\d)\s*(.*)\z/i.match( str )
      unless m then
        raise HTTPBadResponse, "wrong status line: #{str}"
      end
      @http_version = m[1]
      status  = m[2]
      discrip = m[3]
      
      code = HTTPCODE_TO_OBJ[status] ||
             HTTPCODE_CLASS_TO_OBJ[status[0,1]] ||
             UnknownCode
      HTTPResponse.new( code, status, discrip )
    end

    HTTPCODE_CLASS_TO_OBJ = {
      '1' => HTTPInformationCode,
      '2' => HTTPSuccessCode,
      '3' => HTTPRedirectionCode,
      '4' => HTTPClientErrorCode,
      '5' => HTTPServerErrorCode
    }

    HTTPCODE_TO_OBJ = {
      '100' => ContinueCode,
      '101' => HTTPSwitchProtocol,

      '200' => HTTPOK,
      '201' => HTTPCreated,
      '202' => HTTPAccepted,
      '203' => HTTPNonAuthoritativeInformation,
      '204' => HTTPNoContent,
      '205' => HTTPResetContent,
      '206' => HTTPPartialContent,

      '300' => HTTPMultipleChoice,
      '301' => HTTPMovedPermanently,
      '302' => HTTPMovedTemporarily,
      '303' => HTTPMovedPermanently,
      '304' => HTTPNotModified,
      '305' => HTTPUseProxy,

      '400' => HTTPBadRequest,
      '401' => HTTPUnauthorized,
      '402' => HTTPPaymentRequired,
      '403' => HTTPForbidden,
      '404' => HTTPNotFound,
      '405' => HTTPMethodNotAllowed,
      '406' => HTTPNotAcceptable,
      '407' => HTTPProxyAuthenticationRequired,
      '408' => HTTPRequestTimeOut,
      '409' => HTTPConflict,
      '410' => HTTPGone,
      '411' => HTTPFatalErrorCode,
      '412' => HTTPPreconditionFailed,
      '413' => HTTPRequestEntityTooLarge,
      '414' => HTTPRequestURITooLarge,
      '415' => HTTPUnsupportedMediaType,

      '500' => HTTPFatalErrorCode,
      '501' => HTTPNotImplemented,
      '502' => HTTPBadGateway,
      '503' => HTTPServiceUnavailable,
      '504' => HTTPGatewayTimeOut,
      '505' => HTTPVersionNotSupported
    }


    ###
    ### body
    ###

    public

    def get_body( resp, dest )
      if chunked? resp then
        read_chunked dest
      else
        clen = content_length( resp )
        if clen then
          @socket.read clen, dest
        else
          clen = range_length( resp )
          if clen then
            @socket.read clen, dest
          else
            @socket.read_all dest
          end
        end
      end
      end_critical
    end

    def no_body
      end_critical
    end


    private

    def read_chunked( dest )
      len = nil
      total = 0

      while true do
        line = @socket.readline
        m = /[0-9a-fA-F]+/.match( line )
        unless m then
          raise HTTPBadResponse, "wrong chunk size line: #{line}"
        end
        len = m[0].hex
        break if len == 0
        @socket.read( len, dest ); total += len
        @socket.read 2   # \r\n
      end
      until @socket.readline.empty? do
        ;
      end
    end

    def content_length( resp )
      if resp.key? 'content-length' then
        m = /\d+/.match( resp['content-length'] )
        unless m then
          raise HTTPBadResponse, 'wrong Content-Length format'
        end
        m[0].to_i
      else
        nil
      end
    end

    def chunked?( resp )
      tmp = resp['transfer-encoding']
      tmp and /(?:\A|\s+)chunked(?:\s+|\z)/i === tmp
     end

    def range_length( resp )
      if resp.key? 'content-range' then
        m = %r<bytes\s+(\d+)-(\d+)/\d+>.match( resp['content-range'] )
        unless m then
          raise HTTPBadResponse, 'wrong Content-Range format'
        end
        l = m[2].to_i
        u = m[1].to_i
        if l > u then
          nil
        else
          u - l
        end
      else
        nil
      end
    end

  end


  end   # module Net::NetPrivate

end   # module Net