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Edit File : response.rb \| Size : 10.57 KB
# frozen_string_literal: false # 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. All classes are defined under the Net module. # Indentation indicates inheritance. For a list of the classes see Net::HTTP. # # Correspondence <code>HTTP code => class</code> is stored in CODE_TO_OBJ # constant: # # Net::HTTPResponse::CODE_TO_OBJ['404'] #=> Net::HTTPNotFound # 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: message = @code message += ' ' + @message.dump if @message raise error_type().new(message, 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 "Net::HTTPResponse#response is obsolete", uplevel: 1 if $VERBOSE self end def header #:nodoc: warn "Net::HTTPResponse#header is obsolete", uplevel: 1 if $VERBOSE self end def read_header #:nodoc: warn "Net::HTTPResponse#read_header is obsolete", uplevel: 1 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. # # If +dest+ argument is given, response is read into that variable, # with <code>dest#<<</code> method (it could be String or IO, or any # other object responding to <code><<</code>). # # 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 not supported 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&.downcase when 'deflate', 'gzip', 'x-gzip' then self.delete 'content-encoding' inflate_body_io = Inflater.new(@socket) begin yield inflate_body_io success = true ensure begin inflate_body_io.finish rescue => err # Ignore #finish's error if there is an exception from yield raise err if success 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\| compressed_chunk.clear 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 Back

Edit File : response.rb | Size : 10.57 KB

# frozen_string_literal: false
# 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. All classes are defined under the Net module.
# Indentation indicates inheritance.  For a list of the classes see Net::HTTP.
#
# Correspondence <code>HTTP code => class</code> is stored in CODE_TO_OBJ
# constant:
#
#    Net::HTTPResponse::CODE_TO_OBJ['404'] #=> Net::HTTPNotFound
#
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:
    message = @code
    message += ' ' + @message.dump if @message
    raise error_type().new(message, 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 "Net::HTTPResponse#response is obsolete", uplevel: 1 if $VERBOSE
    self
  end

def header   #:nodoc:
    warn "Net::HTTPResponse#header is obsolete", uplevel: 1 if $VERBOSE
    self
  end

def read_header   #:nodoc:
    warn "Net::HTTPResponse#read_header is obsolete", uplevel: 1 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.
  #
  # If +dest+ argument is given, response is read into that variable,
  # with <code>dest#<<</code> method (it could be String or IO, or any
  # other object responding to <code><<</code>).
  #
  # 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 not supported 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&.downcase
    when 'deflate', 'gzip', 'x-gzip' then
      self.delete 'content-encoding'

inflate_body_io = Inflater.new(@socket)

begin
        yield inflate_body_io
        success = true
      ensure
        begin
          inflate_body_io.finish
        rescue => err
          # Ignore #finish's error if there is an exception from yield
          raise err if success
        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|
          compressed_chunk.clear
          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

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