Class: Brakeman::BaseProcessor

Inherits:
SexpProcessor show all
Includes:
ProcessorHelper, Util
Defined in:
lib/brakeman/processors/base_processor.rb

Overview

Base processor for most processors.

Constant Summary

Constants included from Util

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

Constants inherited from SexpProcessor

SexpProcessor::VERSION

Instance Attribute Summary collapse

Attributes inherited from SexpProcessor

#context, #env, #expected

Instance Method Summary collapse

Methods included from Util

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

Methods included from ProcessorHelper

#class_name, #process_all, #process_module

Methods inherited from SexpProcessor

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

Constructor Details

#initialize(tracker) ⇒ BaseProcessor

Return a new Processor.



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# File 'lib/brakeman/processors/base_processor.rb', line 12

def initialize tracker
  super()
  @last = nil
  @tracker = tracker
  @ignore = Sexp.new :ignore
  @current_template = @current_module = @current_class = @current_method = nil
end

Instance Attribute Details

#ignore ⇒ Object (readonly)

Returns the value of attribute ignore.



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# File 'lib/brakeman/processors/base_processor.rb', line 9

def ignore
  @ignore
end

Instance Method Details

#find_render_type(args, in_view = false) ⇒ Object

Determines the type of a call to render.

Possible types are: :action, :default, :file, :inline, :js, :json, :nothing, :partial, :template, :text, :update, :xml

And also :layout for inside templates



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# File 'lib/brakeman/processors/base_processor.rb', line 205

def find_render_type args, in_view = false
  rest = Sexp.new(:hash)
  type = nil
  value = nil
  first_arg = args.first

  if args.length == 1 and first_arg == Sexp.new(:lit, :update)
    return :update, nil, Sexp.new(:arglist, *args[0..-2]) #TODO HUH?
  end

  #Look for render :action, ... or render "action", ...
  if string? first_arg or symbol? first_arg
    if @current_template and @tracker.options[:rails3]
      type = :partial
      value = first_arg
    else
      type = :action
      value = first_arg
    end
  elsif first_arg.is_a? Symbol or first_arg.is_a? String
    type = :action
    value = Sexp.new(:lit, first_arg.to_sym)
elsif first_arg.nil?
	type = :default
  elsif not hash? first_arg
    type = :action
    value = first_arg
  end

  types_in_hash = Set[:action, :file, :inline, :js, :json, :nothing, :partial, :template, :text, :update, :xml]

  #render :layout => "blah" means something else when in a template
  if in_view
    types_in_hash << :layout
  end

  #Look for "type" of render in options hash
  #For example, render :file => "blah"
  if hash? args.last
    hash_iterate(args.last) do |key, val|
      if symbol? key and types_in_hash.include? key.value
        type = key.value
        value = val
      else  
        rest << key << val
      end
    end
  end

  type ||= :default
  value ||= :default
  return type, value, rest
end

#make_render(exp, in_view = false) ⇒ Object

Generates :render node from call to render.



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# File 'lib/brakeman/processors/base_processor.rb', line 190

def make_render exp, in_view = false 
  render_type, value, rest = find_render_type exp.args, in_view
  rest = process rest
  result = Sexp.new(:render, render_type, value, rest)
  result.line(exp.line)
  result
end

#make_render_in_view(exp) ⇒ Object

Convenience method for ‘make_render exp, true`



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# File 'lib/brakeman/processors/base_processor.rb', line 185

def make_render_in_view exp
  make_render exp, true
end

#process_arglist(exp) ⇒ Object

Processes the values in an argument list



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# File 'lib/brakeman/processors/base_processor.rb', line 145

def process_arglist exp
  exp = exp.dup
  exp.shift
  exp.map! do |e|
    process e
  end

  exp.unshift :arglist
end

#process_attrasgn(exp) ⇒ Object

Processes an attribute assignment, which can be either x.y = 1 or x = 1



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# File 'lib/brakeman/processors/base_processor.rb', line 172

def process_attrasgn exp
  exp = exp.dup
  exp.target = process exp.target
  exp.arglist = process exp.arglist
  exp
end

#process_block(exp) ⇒ Object

Processes a block. Changes Sexp node type to :rlist



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# File 'lib/brakeman/processors/base_processor.rb', line 109

def process_block exp
  exp = exp.dup
  exp.shift

  exp.map! do |e|
    process e
  end

  exp.unshift :rlist
end

#process_class(exp) ⇒ Object 



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# File 'lib/brakeman/processors/base_processor.rb', line 20

def process_class exp
  current_class = @current_class
  @current_class = class_name exp[1]
  process exp[3]
  @current_class = current_class
  exp
end

#process_default(exp) ⇒ Object

Default processing.



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# File 'lib/brakeman/processors/base_processor.rb', line 44

def process_default exp
  exp = exp.dup

  exp.each_with_index do |e, i|
    if sexp? e and not e.empty?
      exp[i] = process e
    else
      e
    end
  end

  exp
end

#process_dstr(exp) ⇒ Object

String with interpolation. Changes Sexp node type to :string_interp



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# File 'lib/brakeman/processors/base_processor.rb', line 87

def process_dstr exp
  exp = exp.dup
  exp.shift
  exp.map! do |e|
    if e.is_a? String
      e
    elsif e.value.is_a? String
      e.value
    else
      res = process e
      if res.empty?
        nil
      else
        res
      end
    end
  end.compact!

  exp.unshift :string_interp
end

#process_evstr(exp) ⇒ Object

Processes the inside of an interpolated String. Changes Sexp node type to :string_eval



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# File 'lib/brakeman/processors/base_processor.rb', line 122

def process_evstr exp
  exp = exp.dup
  exp[0] = :string_eval
  exp[1] = process exp[1]
  exp
end

#process_hash(exp) ⇒ Object

Processes a hash



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# File 'lib/brakeman/processors/base_processor.rb', line 130

def process_hash exp
  exp = exp.dup
  exp.shift
  exp.map! do |e|
    if sexp? e
      process e
    else
      e
    end
  end

  exp.unshift :hash
end

#process_if(exp) ⇒ Object

Process an if statement.



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# File 'lib/brakeman/processors/base_processor.rb', line 59

def process_if exp
  exp = exp.dup
  exp[1] = process exp.condition
  exp[2] = process exp.then_clause if exp.then_clause
  exp[3] = process exp.else_clause if exp.else_clause
  exp
end

#process_ignore(exp) ⇒ Object

Ignore ignore Sexps



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# File 'lib/brakeman/processors/base_processor.rb', line 180

def process_ignore exp
  exp
end

#process_iter(exp) ⇒ Object

Processes calls with blocks. Changes Sexp node type to :call_with_block

s(:iter, CALL, :lasgn|:masgn, BLOCK)



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# File 'lib/brakeman/processors/base_processor.rb', line 70

def process_iter exp
  exp = exp.dup
  call = process exp.block_call
  #deal with assignments somehow
  if exp.block
    block = process exp.block
    block = nil if block.empty?
  else
    block = nil
  end

  call = Sexp.new(:call_with_block, call, exp.block_args, block).compact
  call.line(exp.line)
  call
end

#process_lasgn(exp) ⇒ Object Also known as: process_iasgn

Processes a local assignment



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# File 'lib/brakeman/processors/base_processor.rb', line 156

def process_lasgn exp
  exp = exp.dup
  exp.rhs = process exp.rhs
  exp
end

#process_scope(exp) ⇒ Object

Process a new scope. Removes expressions that are set to nil.



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# File 'lib/brakeman/processors/base_processor.rb', line 29

def process_scope exp
  exp = exp.dup
  exp.shift
  exp.map! do |e|
    res = process e
    if res.empty?
      res = nil
    else
      res
    end
  end.compact
  exp.unshift :scope
end