146 lines
2.5 KiB
Ruby
146 lines
2.5 KiB
Ruby
require 'rex/proto/http'
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module Rex
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module Proto
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module Http
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###
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#
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# Represents the logical HTTP header portion of an HTTP packet (request or
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# response).
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#
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###
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class Packet::Header < Hash
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#
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# Initializes an HTTP packet header class that inherits from a Hash base
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# class.
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#
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def initialize
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self.dcase_hash = {}
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reset
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end
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#
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# Parses a header from a string.
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#
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# XXX - Putting : in a header value fucks this up pretty badly
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def from_s(header)
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reset
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# put the non-standard line terminations back to normal
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# gah. not having look behinds suck,
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header.gsub!(/([^\r])\n/,'\1' + "\r\n")
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# undo folding, kinda ugly but works for now.
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header.gsub!(/:\s*\r\n\s+/smi,': ')
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# Extract the command string
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self.cmd_string = header.slice!(/.+\r\n/)
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# Extract each header value pair
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header.split(/\r\n/m).each { |str|
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if (md = str.match(/^(.+?): (.+?)$/))
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self[md[1]] = md[2]
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end
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}
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end
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#
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# More advanced [] that does downcase comparison.
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#
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def [](key)
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begin
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if ((rv = self.fetch(key)) == nil)
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rv = self.dcase_hash[key.downcase]
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end
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rescue IndexError
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rv = nil
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end
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return rv
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end
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#
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# More advanced []= that does downcase storage.
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#
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def []=(key, value)
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stored = false
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self.each_key { |k|
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if (k.downcase == key.downcase)
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self.store(k, value)
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stored = true
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end
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}
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self.store(key, value) if (stored == false)
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self.dcase_hash[key.downcase] = value
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end
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#
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# Converts the header to a string.
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#
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def to_s(prefix = '')
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str = prefix
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if self.junk_headers
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while str.length < 4096
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if self.fold
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str += "X-#{Rex::Text.rand_text_alphanumeric(rand(30) + 5)}:\r\n\t#{Rex::Text.rand_text_alphanumeric(rand(1024) + 1)}\r\n"
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else
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str += "X-#{Rex::Text.rand_text_alphanumeric(rand(30) + 5)}: #{Rex::Text.rand_text_alphanumeric(rand(1024) + 1)}\r\n"
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end
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end
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end
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each_pair { |var, val|
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if self.fold
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str += "#{var.to_s}:\r\n\t#{val.to_s}\r\n"
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else
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str += "#{var.to_s}: #{val.to_s}\r\n"
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end
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}
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str += "\r\n"
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return str
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end
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#
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# Brings in from an array like yo.
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#
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def from_a(ary)
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ary.each { |e|
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self[e[0]] = e[1]
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}
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end
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#
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# Flushes all header pairs.
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#
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def reset
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self.cmd_string = ''
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self.clear
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self.dcase_hash.clear
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end
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#
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# The raw command string associated with the header which will vary between
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# requests and responses.
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#
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attr_accessor :junk_headers
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attr_accessor :cmd_string
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attr_accessor :fold
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protected
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attr_accessor :dcase_hash # :nodoc:
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end
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end
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end
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end
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