Class: Bugsnag::Cleaner

Inherits:
Object
  • Object
show all
Defined in:
lib/bugsnag/cleaner.rb

Constant Summary collapse

ENCODING_OPTIONS = 
{:invalid => :replace, :undef => :replace}.freeze
FILTERED = 
'[FILTERED]'.freeze
RECURSION = 
'[RECURSION]'.freeze
OBJECT = 
'[OBJECT]'.freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(filters) ⇒ Cleaner

Returns a new instance of Cleaner.



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# File 'lib/bugsnag/cleaner.rb', line 10

def initialize(filters)
  @filters = Array(filters)
  @deep_filters = @filters.any? {|f| f.kind_of?(Regexp) && f.to_s.include?("\\.".freeze) }
end

Class Method Details

.clean_object_encoding(obj) ⇒ Object 



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# File 'lib/bugsnag/cleaner.rb', line 73

def self.clean_object_encoding(obj)
  new(nil).clean_object(obj)
end

Instance Method Details

#clean_object(obj) ⇒ Object 



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# File 'lib/bugsnag/cleaner.rb', line 15

def clean_object(obj)
  traverse_object(obj, {}, nil)
end

#clean_string(str) ⇒ Object 



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# File 'lib/bugsnag/cleaner.rb', line 59

def clean_string(str)
  if defined?(str.encoding) && defined?(Encoding::UTF_8)
    if str.encoding == Encoding::UTF_8
      str.valid_encoding? ? str : str.encode('utf-16', ENCODING_OPTIONS).encode('utf-8')
    else
      str.encode('utf-8', ENCODING_OPTIONS)
    end
  elsif defined?(Iconv)
    Iconv.conv('UTF-8//IGNORE', 'UTF-8', str) || str
  else
    str
  end
end

#clean_url(url) ⇒ Object 



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# File 'lib/bugsnag/cleaner.rb', line 77

def clean_url(url)
  return url if @filters.empty?

  uri = URI(url)
  return url unless uri.query

  query_params = uri.query.split('&').map { |pair| pair.split('=') }
  query_params.map! do |key, val|
    if filters_match?(key)
      "#{key}=#{FILTERED}"
    else
      "#{key}=#{val}"
    end
  end

  uri.query = query_params.join('&')
  uri.to_s
end

#traverse_object(obj, seen, scope) ⇒ Object 



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# File 'lib/bugsnag/cleaner.rb', line 19

def traverse_object(obj, seen, scope)
  return nil unless obj

  # Protect against recursion of recursable items
  protection = if obj.is_a?(Hash) || obj.is_a?(Array) || obj.is_a?(Set)
    return seen[obj] if seen[obj]
    seen[obj] = RECURSION
  end

  value = case obj
  when Hash
    clean_hash = {}
    obj.each do |k,v|
      if filters_match_deeply?(k, scope)
        clean_hash[k] = FILTERED
      else
        clean_hash[k] = traverse_object(v, seen, [scope, k].compact.join('.'))
      end
    end
    clean_hash
  when Array, Set
    obj.map { |el| traverse_object(el, seen, scope) }.compact
  when Numeric, TrueClass, FalseClass
    obj
  when String
    clean_string(obj)
  else
    str = obj.to_s
    # avoid leaking potentially sensitive data from objects' #inspect output
    if str =~ /#<.*>/
      OBJECT
    else
      clean_string(str)
    end
  end

  seen[obj] = value if protection
  value
end