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# frozen_string_literal: true
module Net
class HTTPResponse
# rubocop: disable Cop/LineBreakAfterGuardClauses
# rubocop: disable Cop/LineBreakAroundConditionalBlock
# rubocop: disable Layout/EmptyLineAfterGuardClause
# rubocop: disable Style/AndOr
# rubocop: disable Style/CharacterLiteral
# rubocop: disable Style/InfiniteLoop
# Original method:
# https://github.com/ruby/ruby/blob/v2_7_5/lib/net/http/response.rb#L54-L69
#
# Our changes:
# - Pass along the `start_time` to `Gitlab::HTTP_V2::BufferedIo`, so we can raise a timeout
# if reading the headers takes too long.
# - Limit the regexes to avoid ReDoS attacks.
def self.each_response_header(sock)
start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
key = value = nil
while true
line = if sock.is_a?(Gitlab::HTTP_V2::BufferedIo)
sock.readuntil("\n", true, start_time)
else
sock.readuntil("\n", true)
end
line = line.sub(/\s{0,10}\z/, '')
break if line.empty?
if line[0] == ?\s or line[0] == ?\t and value
# rubocop:disable Gitlab/NoCodeCoverageComment
# :nocov:
value << ' ' unless value.empty?
value << line.strip
# :nocov:
# rubocop:enable Gitlab/NoCodeCoverageComment
else
yield key, value if key
key, value = line.strip.split(/\s{0,10}:\s{0,10}/, 2)
raise Net::HTTPBadResponse, 'wrong header line format' if value.nil?
end
end
yield key, value if key
end
# rubocop: enable Cop/LineBreakAfterGuardClauses
# rubocop: enable Cop/LineBreakAroundConditionalBlock
# rubocop: enable Layout/EmptyLineAfterGuardClause
# rubocop: enable Style/AndOr
# rubocop: enable Style/CharacterLiteral
# rubocop: enable Style/InfiniteLoop
end
end
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