Class: Brakeman::ErubisTemplateProcessor

Inherits:
TemplateProcessor show all
Defined in:
lib/brakeman/processors/erubis_template_processor.rb

Overview

Processes ERB templates using Erubis instead of erb.

Constant Summary

Constants inherited from BaseProcessor

BaseProcessor::IGNORE

Constants included from Util

Util::ALL_PARAMETERS, Util::COOKIES, Util::COOKIES_SEXP, Util::PARAMETERS, Util::PARAMS_SEXP, Util::PATH_PARAMETERS, Util::QUERY_PARAMETERS, Util::REQUEST_ENV, Util::REQUEST_PARAMETERS, Util::REQUEST_PARAMS, Util::SESSION, Util::SESSION_SEXP

Constants inherited from SexpProcessor

SexpProcessor::VERSION

Instance Attribute Summary

Attributes inherited from SexpProcessor

#context, #env, #expected

Instance Method Summary collapse

Methods inherited from TemplateProcessor

#initialize, #process, #process_escaped_output, #process_lasgn, #process_output

Methods inherited from BaseProcessor

#find_render_type, #ignore, #initialize, #make_render, #make_render_in_view, #process_arglist, #process_default, #process_dstr, #process_evstr, #process_hash, #process_if, #process_ignore, #process_iter, #process_lasgn, #process_scope

Methods included from Util

#array?, #block?, #call?, #camelize, #contains_class?, #context_for, #cookies?, #false?, #file_by_name, #file_for, #github_url, #hash?, #hash_access, #hash_insert, #hash_iterate, #integer?, #make_call, #node_type?, #number?, #params?, #pluralize, #regexp?, #relative_path, #request_env?, #request_value?, #result?, #set_env_defaults, #sexp?, #string?, #symbol?, #table_to_csv, #template_path_to_name, #true?, #truncate_table, #underscore

Methods included from ProcessorHelper

#class_name, #process_all, #process_all!, #process_call_args, #process_class, #process_module

Methods inherited from SexpProcessor

#error_handler, #in_context, #initialize, #process, #process_dummy, #scope

Constructor Details

This class inherits a constructor from Brakeman::TemplateProcessor

Instance Method Details

#process_attrasgn(exp) ⇒ Object

Look for assignments to output buffer that look like this:

@output_buffer.append = some_output
@output_buffer.safe_append = some_output

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# File 'lib/brakeman/processors/erubis_template_processor.rb', line 76

def process_attrasgn exp
  if exp.target.node_type == :ivar and exp.target.value == :@output_buffer
    if exp.method == :append= or exp.method == :safe_append=
      arg = exp.first_arg = process(exp.first_arg)

      if arg.node_type == :str
        ignore
      else
        s = Sexp.new :escaped_output, arg
        s.line(exp.line)
        @current_template[:outputs] << s
        s
      end
    else
      super
    end
  else
    super
  end
end

#process_block(exp) ⇒ Object

Process blocks, ignoring :ignore exps


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# File 'lib/brakeman/processors/erubis_template_processor.rb', line 57

def process_block exp
  exp = exp.dup
  exp.shift
  exp.map! do |e|
    res = process e
    if res.empty? or res == ignore
      nil
    else
      res
    end
  end
  block = Sexp.new(:rlist).concat(exp).compact
  block.line(exp.line)
  block
end

#process_call(exp) ⇒ Object

s(:call, TARGET, :method, ARGS)


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# File 'lib/brakeman/processors/erubis_template_processor.rb', line 7

def process_call exp
  target = exp.target
  if sexp? target
    target = process target
  end
  method = exp.method

  #_buf is the default output variable for Erubis
  if node_type?(target, :lvar, :ivar) and (target.value == :_buf or target.value == :@output_buffer)
    if method == :<< or method == :safe_concat
      exp.arglist = process exp.arglist

      arg = exp.first_arg

      #We want the actual content
      if arg.node_type == :call and (arg.method == :to_s or arg.method == :html_safe!)
        arg = arg.target
      end

      if arg.node_type == :str #ignore plain strings
        ignore
      elsif node_type? target, :ivar and target.value == :@output_buffer
        s = Sexp.new :escaped_output, arg
        s.line(exp.line)
        @current_template[:outputs] << s
        s
      else
        s = Sexp.new :output, arg
        s.line(exp.line)
        @current_template[:outputs] << s
        s
      end
    elsif method == :to_s
      ignore
    else
      abort "Unrecognized action on buffer: #{method}"
    end
  elsif target == nil and method == :render
    exp.arglist = process exp.arglist
    make_render_in_view exp
  else
    #TODO: Is it really necessary to create a new Sexp here?
    call = make_call target, method, process_all!(exp.args)
    call.original_line = exp.original_line
    call.line(exp.line)
    call
  end
end