Class: Brakeman::TemplateParser

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/brakeman/parsers/template_parser.rb

Defined Under Namespace

Classes: TemplateFile

Constant Summary collapse

KNOWN_TEMPLATE_EXTENSIONS = 
/.*\.(erb|haml|rhtml|slim)$/

Constants included from Util

Util::ALL_COOKIES, Util::ALL_PARAMETERS, Util::COOKIES, Util::COOKIES_SEXP, Util::DIR_CONST, Util::LITERALS, Util::PARAMETERS, Util::PARAMS_SEXP, Util::PATH_PARAMETERS, Util::QUERY_PARAMETERS, Util::REQUEST_COOKIES, Util::REQUEST_ENV, Util::REQUEST_PARAMETERS, Util::REQUEST_PARAMS, Util::REQUEST_REQUEST_PARAMETERS, Util::SAFE_LITERAL, Util::SESSION, Util::SESSION_SEXP, Util::SIMPLE_LITERALS

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util

#all_literals?, #array?, #block?, #call?, #camelize, #class_name, #constant?, #contains_class?, #cookies?, #dir_glob?, #false?, #hash?, #hash_access, #hash_insert, #hash_iterate, #hash_values, #integer?, #kwsplat?, #literal?, #make_call, #node_type?, #number?, #params?, #pluralize, #rails_version, #recurse_check?, #regexp?, #remove_kwsplat, #request_headers?, #request_value?, #result?, #safe_literal, #safe_literal?, #safe_literal_target?, #set_env_defaults, #sexp?, #simple_literal?, #string?, #string_interp?, #symbol?, #template_path_to_name, #true?, #underscore

Constructor Details

#initialize(tracker, file_parser) ⇒ TemplateParser 



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# File 'lib/brakeman/parsers/template_parser.rb', line 9

def initialize tracker, file_parser
  @tracker = tracker
  @file_parser = file_parser
  @slim_smart = nil # Load slim/smart ?
end

Instance Attribute Details

#tracker ⇒ Object (readonly)

Returns the value of attribute tracker.



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# File 'lib/brakeman/parsers/template_parser.rb', line 4

def tracker
  @tracker
end

Class Method Details

.parse_inline_erb(tracker, text) ⇒ Object 



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# File 'lib/brakeman/parsers/template_parser.rb', line 147

def self.parse_inline_erb tracker, text
  fp = Brakeman::FileParser.new(tracker.app_tree, tracker.options[:parser_timeout])
  tp = self.new(tracker, fp)
  src = tp.parse_erb '_inline_', text
  type = tp.erubis? ? :erubis : :erb

  return type, fp.parse_ruby(src, "_inline_")
end

Instance Method Details

#erubis? ⇒ Boolean 



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# File 'lib/brakeman/parsers/template_parser.rb', line 72

def erubis?
  tracker.config.escape_html? or
    tracker.config.erubis?
end

#haml6? ⇒ Boolean 



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# File 'lib/brakeman/parsers/template_parser.rb', line 102

def haml6?
  return @haml6 unless @haml6.nil?

  Brakeman.load_brakeman_dependency 'haml'
  major_version = Haml::VERSION.split('.').first.to_i

  if major_version >= 6
    @haml6 = true
  else
    @haml6 = false
  end
end

#load_slim_smart? ⇒ Boolean 



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# File 'lib/brakeman/parsers/template_parser.rb', line 132

def load_slim_smart?
  return !@slim_smart unless @slim_smart.nil?

  # Terrible hack to find
  #   gem "slim", "~> 3.0.1", require: ["slim", "slim/smart"]
  if tracker.app_tree.exists? 'Gemfile'
    gemfile_contents = tracker.app_tree.file_path('Gemfile').read
    if gemfile_contents.include? 'slim/smart'
      return true
    end
  end

  false
end

#parse_erb(path, text) ⇒ Object 



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# File 'lib/brakeman/parsers/template_parser.rb', line 48

def parse_erb path, text
  if tracker.config.escape_html?
    if tracker.options[:rails3]
      require 'brakeman/parsers/rails3_erubis'
      Brakeman::Rails3Erubis.new(text, :filename => path).src
    else
      require 'brakeman/parsers/rails2_xss_plugin_erubis'
      Brakeman::Rails2XSSPluginErubis.new(text, :filename => path).src
    end
  elsif tracker.config.erubis?
    require 'brakeman/parsers/rails2_erubis'
    Brakeman::ScannerErubis.new(text, :filename => path).src
  else
    require 'erb'
    src = if ERB.instance_method(:initialize).parameters.assoc(:key) # Ruby 2.6+
      ERB.new(text, trim_mode: '-').src
    else
      ERB.new(text, nil, '-').src
    end
    src.sub!(/^#.*\n/, '')
    src
  end
end

#parse_haml(path, text) ⇒ Object 



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# File 'lib/brakeman/parsers/template_parser.rb', line 77

def parse_haml path, text
  if haml6?
    require_relative 'haml6_embedded'

    Haml::Template.new(filename: path.relative,
                       :escape_html => tracker.config.escape_html?,
                       generator: Temple::Generators::RailsOutputBuffer,
                       use_html_safe: true,
                       buffer_class: 'ActionView::OutputBuffer',
                       disable_capture: true,
                      ) { text }.precompiled_template
  else
    require_relative 'haml_embedded'

    Haml::Engine.new(text,
                     :filename => path,
                     :escape_html => tracker.config.escape_html?,
                     :escape_filter_interpolations => tracker.config.escape_filter_interpolations?
                    ).precompiled.gsub(/([^\\])\\n/, '\1')
  end
rescue Haml::Error => e
  tracker.error e, ["While compiling HAML in #{path}"] << e.backtrace
  nil
end

#parse_slim(path, text) ⇒ Object 



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# File 'lib/brakeman/parsers/template_parser.rb', line 115

def parse_slim path, text
  Brakeman.load_brakeman_dependency 'slim'

  if @slim_smart.nil? and load_slim_smart?
    @slim_smart = true
    Brakeman.load_brakeman_dependency 'slim/smart'
  else
    @slim_smart = false
  end

  require_relative 'slim_embedded'

  Slim::Template.new(path,
                     :disable_capture => true,
                     :generator => Temple::Generators::RailsOutputBuffer) { text }.precompiled_template
end

#parse_template(path, text) ⇒ Object 



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# File 'lib/brakeman/parsers/template_parser.rb', line 15

def parse_template path, text
  type = path.relative.match(KNOWN_TEMPLATE_EXTENSIONS)[1].to_sym
  type = :erb if type == :rhtml
  name = template_path_to_name path
  Brakeman.debug "Parsing #{path}"

  begin
    src = case type
          when :erb
            type = :erubis if erubis?
            parse_erb path, text
          when :haml
            type = :haml6 if haml6?
            parse_haml path, text
          when :slim
            parse_slim path, text
          else
            tracker.error "Unknown template type in #{path}"
            nil
          end

    if src and ast = @file_parser.parse_ruby(src, path)
      @file_parser.file_list << TemplateFile.new(path, ast, name, type)
    end
  rescue Racc::ParseError => e
    tracker.error e, "Could not parse #{path}"
  rescue StandardError, LoadError => e
    tracker.error e.exception(e.message + "\nWhile processing #{path}"), e.backtrace
  end

  nil
end