summaryrefslogtreecommitdiff
path: root/jni/ruby/lib/net/http/response.rb
blob: 126c22160d329ae1021d7035ca7d9c4da25e16ef (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
# HTTP response class.
#
# This class wraps together the response header and the response body (the
# entity requested).
#
# It mixes in the HTTPHeader module, which provides access to response
# header values both via hash-like methods and via individual readers.
#
# Note that each possible HTTP response code defines its own
# HTTPResponse subclass.  These are listed below.
#
# All classes are defined under the Net module. Indentation indicates
# inheritance.  For a list of the classes see Net::HTTP.
#
#
class Net::HTTPResponse
  class << self
    # true if the response has a body.
    def body_permitted?
      self::HAS_BODY
    end

    def exception_type   # :nodoc: internal use only
      self::EXCEPTION_TYPE
    end

    def read_new(sock)   #:nodoc: internal use only
      httpv, code, msg = read_status_line(sock)
      res = response_class(code).new(httpv, code, msg)
      each_response_header(sock) do |k,v|
        res.add_field k, v
      end
      res
    end

    private

    def read_status_line(sock)
      str = sock.readline
      m = /\AHTTP(?:\/(\d+\.\d+))?\s+(\d\d\d)(?:\s+(.*))?\z/in.match(str) or
        raise Net::HTTPBadResponse, "wrong status line: #{str.dump}"
      m.captures
    end

    def response_class(code)
      CODE_TO_OBJ[code] or
      CODE_CLASS_TO_OBJ[code[0,1]] or
      Net::HTTPUnknownResponse
    end

    def each_response_header(sock)
      key = value = nil
      while true
        line = sock.readuntil("\n", true).sub(/\s+\z/, '')
        break if line.empty?
        if line[0] == ?\s or line[0] == ?\t and value
          value << ' ' unless value.empty?
          value << line.strip
        else
          yield key, value if key
          key, value = line.strip.split(/\s*:\s*/, 2)
          raise Net::HTTPBadResponse, 'wrong header line format' if value.nil?
        end
      end
      yield key, value if key
    end
  end

  # next is to fix bug in RDoc, where the private inside class << self
  # spills out.
  public

  include Net::HTTPHeader

  def initialize(httpv, code, msg)   #:nodoc: internal use only
    @http_version = httpv
    @code         = code
    @message      = msg
    initialize_http_header nil
    @body = nil
    @read = false
    @uri  = nil
    @decode_content = false
  end

  # The HTTP version supported by the server.
  attr_reader :http_version

  # The HTTP result code string. For example, '302'.  You can also
  # determine the response type by examining which response subclass
  # the response object is an instance of.
  attr_reader :code

  # The HTTP result message sent by the server. For example, 'Not Found'.
  attr_reader :message
  alias msg message   # :nodoc: obsolete

  # The URI used to fetch this response.  The response URI is only available
  # if a URI was used to create the request.
  attr_reader :uri

  # Set to true automatically when the request did not contain an
  # Accept-Encoding header from the user.
  attr_accessor :decode_content

  def inspect
    "#<#{self.class} #{@code} #{@message} readbody=#{@read}>"
  end

  #
  # response <-> exception relationship
  #

  def code_type   #:nodoc:
    self.class
  end

  def error!   #:nodoc:
    raise error_type().new(@code + ' ' + @message.dump, self)
  end

  def error_type   #:nodoc:
    self.class::EXCEPTION_TYPE
  end

  # Raises an HTTP error if the response is not 2xx (success).
  def value
    error! unless self.kind_of?(Net::HTTPSuccess)
  end

  def uri= uri # :nodoc:
    @uri = uri.dup if uri
  end

  #
  # header (for backward compatibility only; DO NOT USE)
  #

  def response   #:nodoc:
    warn "#{caller(1)[0]}: warning: Net::HTTPResponse#response is obsolete" if $VERBOSE
    self
  end

  def header   #:nodoc:
    warn "#{caller(1)[0]}: warning: Net::HTTPResponse#header is obsolete" if $VERBOSE
    self
  end

  def read_header   #:nodoc:
    warn "#{caller(1)[0]}: warning: Net::HTTPResponse#read_header is obsolete" if $VERBOSE
    self
  end

  #
  # body
  #

  def reading_body(sock, reqmethodallowbody)  #:nodoc: internal use only
    @socket = sock
    @body_exist = reqmethodallowbody && self.class.body_permitted?
    begin
      yield
      self.body   # ensure to read body
    ensure
      @socket = nil
    end
  end

  # Gets the entity body returned by the remote HTTP server.
  #
  # If a block is given, the body is passed to the block, and
  # the body is provided in fragments, as it is read in from the socket.
  #
  # Calling this method a second or subsequent time for the same
  # HTTPResponse object will return the value already read.
  #
  #   http.request_get('/index.html') {|res|
  #     puts res.read_body
  #   }
  #
  #   http.request_get('/index.html') {|res|
  #     p res.read_body.object_id   # 538149362
  #     p res.read_body.object_id   # 538149362
  #   }
  #
  #   # using iterator
  #   http.request_get('/index.html') {|res|
  #     res.read_body do |segment|
  #       print segment
  #     end
  #   }
  #
  def read_body(dest = nil, &block)
    if @read
      raise IOError, "#{self.class}\#read_body called twice" if dest or block
      return @body
    end
    to = procdest(dest, block)
    stream_check
    if @body_exist
      read_body_0 to
      @body = to
    else
      @body = nil
    end
    @read = true

    @body
  end

  # Returns the full entity body.
  #
  # Calling this method a second or subsequent time will return the
  # string already read.
  #
  #   http.request_get('/index.html') {|res|
  #     puts res.body
  #   }
  #
  #   http.request_get('/index.html') {|res|
  #     p res.body.object_id   # 538149362
  #     p res.body.object_id   # 538149362
  #   }
  #
  def body
    read_body()
  end

  # Because it may be necessary to modify the body, Eg, decompression
  # this method facilitates that.
  def body=(value)
    @body = value
  end

  alias entity body   #:nodoc: obsolete

  private

  ##
  # Checks for a supported Content-Encoding header and yields an Inflate
  # wrapper for this response's socket when zlib is present.  If the
  # Content-Encoding is unsupported or zlib is missing the plain socket is
  # yielded.
  #
  # If a Content-Range header is present a plain socket is yielded as the
  # bytes in the range may not be a complete deflate block.

  def inflater # :nodoc:
    return yield @socket unless Net::HTTP::HAVE_ZLIB
    return yield @socket unless @decode_content
    return yield @socket if self['content-range']

    v = self['content-encoding']
    case v && v.downcase
    when 'deflate', 'gzip', 'x-gzip' then
      self.delete 'content-encoding'

      inflate_body_io = Inflater.new(@socket)

      begin
        yield inflate_body_io
      ensure
        orig_err = $!
        begin
          inflate_body_io.finish
        rescue => err
          raise orig_err || err
        end
      end
    when 'none', 'identity' then
      self.delete 'content-encoding'

      yield @socket
    else
      yield @socket
    end
  end

  def read_body_0(dest)
    inflater do |inflate_body_io|
      if chunked?
        read_chunked dest, inflate_body_io
        return
      end

      @socket = inflate_body_io

      clen = content_length()
      if clen
        @socket.read clen, dest, true   # ignore EOF
        return
      end
      clen = range_length()
      if clen
        @socket.read clen, dest
        return
      end
      @socket.read_all dest
    end
  end

  ##
  # read_chunked reads from +@socket+ for chunk-size, chunk-extension, CRLF,
  # etc. and +chunk_data_io+ for chunk-data which may be deflate or gzip
  # encoded.
  #
  # See RFC 2616 section 3.6.1 for definitions

  def read_chunked(dest, chunk_data_io) # :nodoc:
    total = 0
    while true
      line = @socket.readline
      hexlen = line.slice(/[0-9a-fA-F]+/) or
          raise Net::HTTPBadResponse, "wrong chunk size line: #{line}"
      len = hexlen.hex
      break if len == 0
      begin
        chunk_data_io.read len, dest
      ensure
        total += len
        @socket.read 2   # \r\n
      end
    end
    until @socket.readline.empty?
      # none
    end
  end

  def stream_check
    raise IOError, 'attempt to read body out of block' if @socket.closed?
  end

  def procdest(dest, block)
    raise ArgumentError, 'both arg and block given for HTTP method' if
      dest and block
    if block
      Net::ReadAdapter.new(block)
    else
      dest || ''
    end
  end

  ##
  # Inflater is a wrapper around Net::BufferedIO that transparently inflates
  # zlib and gzip streams.

  class Inflater # :nodoc:

    ##
    # Creates a new Inflater wrapping +socket+

    def initialize socket
      @socket = socket
      # zlib with automatic gzip detection
      @inflate = Zlib::Inflate.new(32 + Zlib::MAX_WBITS)
    end

    ##
    # Finishes the inflate stream.

    def finish
      return if @inflate.total_in == 0
      @inflate.finish
    end

    ##
    # Returns a Net::ReadAdapter that inflates each read chunk into +dest+.
    #
    # This allows a large response body to be inflated without storing the
    # entire body in memory.

    def inflate_adapter(dest)
      if dest.respond_to?(:set_encoding)
        dest.set_encoding(Encoding::ASCII_8BIT)
      elsif dest.respond_to?(:force_encoding)
        dest.force_encoding(Encoding::ASCII_8BIT)
      end
      block = proc do |compressed_chunk|
        @inflate.inflate(compressed_chunk) do |chunk|
          dest << chunk
        end
      end

      Net::ReadAdapter.new(block)
    end

    ##
    # Reads +clen+ bytes from the socket, inflates them, then writes them to
    # +dest+.  +ignore_eof+ is passed down to Net::BufferedIO#read
    #
    # Unlike Net::BufferedIO#read, this method returns more than +clen+ bytes.
    # At this time there is no way for a user of Net::HTTPResponse to read a
    # specific number of bytes from the HTTP response body, so this internal
    # API does not return the same number of bytes as were requested.
    #
    # See https://bugs.ruby-lang.org/issues/6492 for further discussion.

    def read clen, dest, ignore_eof = false
      temp_dest = inflate_adapter(dest)

      @socket.read clen, temp_dest, ignore_eof
    end

    ##
    # Reads the rest of the socket, inflates it, then writes it to +dest+.

    def read_all dest
      temp_dest = inflate_adapter(dest)

      @socket.read_all temp_dest
    end

  end

end