Class: Brakeman::Rescanner

Inherits:
Scanner
  • Object
show all
Includes:
Util
Defined in:
lib/brakeman/rescanner.rb

Overview

Class for rescanning changed files after an initial scan

Constant Summary collapse

KNOWN_TEMPLATE_EXTENSIONS = 
Brakeman::TemplateParser::KNOWN_TEMPLATE_EXTENSIONS
SCAN_ORDER = 
[:config, :gemfile, :initializer, :lib, :routes, :template,
:model, :controller]

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

Attributes inherited from Scanner

#options

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_env?, #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

Methods inherited from Scanner

#detect_file_types, #guess_rails_version, #index_call_sites, #parse_files, #parse_ruby_file, #process, #process_config, #process_controller, #process_controller_data_flows, #process_controllers, #process_gems, #process_initializer, #process_initializers, #process_lib, #process_libs, #process_model, #process_models, #process_routes, #process_template, #process_template_data_flows, #process_templates, #report_progress, #track_progress, #tracker

Constructor Details

#initialize(options, processor, changed_files) ⇒ Rescanner

Create new Rescanner to scan changed files



13
14
15
16
17
18
19
20
 
# File 'lib/brakeman/rescanner.rb', line 13

def initialize options, processor, changed_files
  super(options, processor)

  @paths = changed_files.map {|f| tracker.app_tree.file_path(f) }
  @old_results = tracker.filtered_warnings  #Old warnings from previous scan
  @changes = nil                 #True if files had to be rescanned
  @reindex = Set.new
end

Instance Method Details

#file_type(path) ⇒ Object

Guess at what kind of file the path contains



319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
 
# File 'lib/brakeman/rescanner.rb', line 319

def file_type path
  case path
  when /\/app\/controllers/
    :controller
  when /\/app\/views/
    :template
  when /\/app\/models/
    :model
  when /\/lib/
    :lib
  when /\/config\/initializers/
    :initializer
  when /config\/routes\.rb/
    :routes
  when /\/config\/.+\.(rb|yml)/
    :config
  when /Gemfile|gems\./
    :gemfile
  else
    :unknown
  end
end

#parse_ruby_files(list) ⇒ Object 



392
393
394
395
396
397
398
 
# File 'lib/brakeman/rescanner.rb', line 392

def parse_ruby_files list
  paths = list.select(&:exists?)
  file_parser = Brakeman::FileParser.new(tracker.app_tree, tracker.options[:parser_timeout], tracker.options[:parallel_checks])
  file_parser.parse_files paths
  tracker.add_errors(file_parser.errors)
  file_parser.file_list
end

#recheck ⇒ Object

Runs checks. Will rescan files if they have not already been scanned



24
25
26
27
28
29
30
 
# File 'lib/brakeman/rescanner.rb', line 24

def recheck
  rescan if @changes.nil?

  tracker.run_checks if @changes

  Brakeman::RescanReport.new @old_results, tracker
end

#remove_deleted_file(path) ⇒ Object

Check controllers, templates, models and libs for data from file and delete it.



296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
 
# File 'lib/brakeman/rescanner.rb', line 296

def remove_deleted_file path
  deleted = false

  [:controllers, :models, :libs].each do |collection|
    tracker.send(collection).delete_if do |_name, data|
      if data.files.include?(path)
        deleted = true
        true
      end
    end
  end

  tracker.templates.delete_if do |_name, data|
    if data.file == path
      deleted = true
      true
    end
  end

  deleted
end

#rescan ⇒ Object

Rescans changed files



33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
 
# File 'lib/brakeman/rescanner.rb', line 33

def rescan
  tracker.template_cache.clear

  paths_by_type = {}

  SCAN_ORDER.each do |type|
    paths_by_type[type] = []
  end

  @paths.each do |path|
    type = file_type(path)
    paths_by_type[type] << path unless type == :unknown
  end

  @changes = false

  SCAN_ORDER.each do |type|
    paths_by_type[type].each do |path|
      Brakeman.debug "Rescanning #{path} as #{type}"

      if rescan_file path, type
        @changes = true
      end
    end
  end

  if @changes and not @reindex.empty?
    tracker.reindex_call_sites @reindex
  end

  self
end

#rescan_controller(path) ⇒ Object 



102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
 
# File 'lib/brakeman/rescanner.rb', line 102

def rescan_controller path
  controller = tracker.reset_controller path
  paths = controller.nil? ? [path] : controller.files
  parse_ruby_files(paths).each do |astfile|
    process_controller astfile
  end

  #Process data flow and template rendering
  #from the controller
  tracker.controllers.each do |name, controller|
    if controller.files.include?(path)
      tracker.templates.each do |template_name, template|
        next unless template.render_path
        if template.render_path.include_controller? name
          tracker.reset_template template_name
        end
      end

      controller.src.each do |file, src|
        @processor.process_controller_alias controller.name, src, nil, file
      end
    end
  end

  @reindex << :templates << :controllers
end

#rescan_deleted_file(path, type) ⇒ Object

Handle rescanning when a file is deleted



240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
 
# File 'lib/brakeman/rescanner.rb', line 240

def rescan_deleted_file path, type
  case type
  when :controller
    rescan_controller path
  when :template
    rescan_deleted_template path
  when :model
    rescan_model path
  when :lib
    rescan_deleted_lib path
  when :initializer
    rescan_deleted_initializer path
  else
    if remove_deleted_file path
      return true
    else
      Brakeman.notify "Ignoring deleted file: #{path}"
    end
  end

  true
end

#rescan_deleted_initializer(path) ⇒ Object 



290
291
292
 
# File 'lib/brakeman/rescanner.rb', line 290

def rescan_deleted_initializer path
  tracker.initializers.delete Pathname.new(path).basename.to_s
end

#rescan_deleted_lib(path) ⇒ Object 



277
278
279
280
281
282
283
284
285
286
287
288
 
# File 'lib/brakeman/rescanner.rb', line 277

def rescan_deleted_lib path
  deleted_lib = nil

  tracker.libs.delete_if do |_name, lib|
    if lib.files.include?(path)
      deleted_lib = lib
      true
    end
  end

  rescan_mixin deleted_lib if deleted_lib
end

#rescan_deleted_template(path) ⇒ Object 



263
264
265
266
267
268
269
270
271
272
273
274
275
 
# File 'lib/brakeman/rescanner.rb', line 263

def rescan_deleted_template path
  return unless path.relative.match KNOWN_TEMPLATE_EXTENSIONS

  template_name = template_path_to_name(path)

  #Remove template
  tracker.reset_template template_name

  #Remove any rendered versions, or partials rendered from it
  tracker.templates.delete_if do |_name, template|
    template.file == path or template.name.to_sym == template_name.to_sym
  end
end

#rescan_file(path, type = nil) ⇒ Object

Rescans a single file



67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
 
# File 'lib/brakeman/rescanner.rb', line 67

def rescan_file path, type = nil
  type ||= file_type path

  unless path.exists?
    return rescan_deleted_file path, type
  end

  case type
  when :controller
    rescan_controller path
  when :template
    rescan_template path
  when :model
    rescan_model path
  when :lib
    rescan_lib path
  when :config
    process_config
  when :initializer
    rescan_initializer path
  when :routes
    rescan_routes
  when :gemfile
    if tracker.config.has_gem? :rails_xss and tracker.config.escape_html?
      tracker.config.escape_html = false
    end

    process_gems
  else
    return false #Nothing to do, file hopefully does not need to be rescanned
  end

  true
end

#rescan_initializer(path) ⇒ Object 



229
230
231
232
233
234
235
236
237
 
# File 'lib/brakeman/rescanner.rb', line 229

def rescan_initializer path
  tracker.reset_initializer path

  parse_ruby_files([path]).each do |astfile|
    process_initializer astfile
  end

  @reindex << :initializers
end

#rescan_lib(path) ⇒ Object 



199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
 
# File 'lib/brakeman/rescanner.rb', line 199

def rescan_lib path
  lib = tracker.reset_lib path
  paths = lib.nil? ? [path] : lib.files
  parse_ruby_files(paths).each do |astfile|
    process_lib astfile
  end

  lib = nil

  tracker.libs.each do |_name, library|
    if library.files.include?(path)
      lib = library
      break
    end
  end

  rescan_mixin lib if lib
end

#rescan_mixin(lib) ⇒ Object 



342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
 
# File 'lib/brakeman/rescanner.rb', line 342

def rescan_mixin lib
  method_names = []

  lib.each_method do |name, _meth|
    method_names << name
  end

  to_rescan = []

  #Rescan controllers that mixed in library
  tracker.controllers.each do |_name, controller|
    if controller.includes.include? lib.name
      controller.files.each do |path|
        unless @paths.include? path
          to_rescan << path
        end
      end
    end
  end

  to_rescan.each do |controller|
    tracker.reset_controller controller
    rescan_file controller
  end

  to_rescan = []

  #Check if a method from this mixin was used to render a template.
  #This is not precise, because a different controller might have the
  #same method...
  tracker.templates.each do |name, template|
    next unless template.render_path

    if template.render_path.include_any_method? method_names
      name.to_s.match(/^([^.]+)/)

      original = tracker.templates[$1.to_sym]

      if original
        to_rescan << [name, original.file]
      end
    end
  end

  to_rescan.each do |template|
    tracker.reset_template template[0]
    rescan_file template[1]
  end
end

#rescan_model(path) ⇒ Object 



181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
 
# File 'lib/brakeman/rescanner.rb', line 181

def rescan_model path
  num_models = tracker.models.length
  model = tracker.reset_model path
  paths = model.nil? ? [path] : model.files
  parse_ruby_files(paths).each do |astfile|
    process_model astfile.path, astfile.ast
  end

  #Only need to rescan other things if a model is added or removed
  if num_models != tracker.models.length
    process_template_data_flows
    process_controller_data_flows
    @reindex << :templates << :controllers
  end

  @reindex << :models
end

#rescan_routes ⇒ Object 



218
219
220
221
222
223
224
225
226
227
 
# File 'lib/brakeman/rescanner.rb', line 218

def rescan_routes
  # Routes affect which controller methods are treated as actions
  # which affects which templates are rendered, so routes, controllers,
  # and templates rendered from controllers must be rescanned
  tracker.reset_routes
  tracker.reset_templates :only_rendered => true
  process_routes
  process_controller_data_flows
  @reindex << :controllers << :templates
end

#rescan_template(path) ⇒ Object 



129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
 
# File 'lib/brakeman/rescanner.rb', line 129

def rescan_template path
  return unless path.relative.match KNOWN_TEMPLATE_EXTENSIONS and path.exists?

  template_name = template_path_to_name(path)

  tracker.reset_template template_name
  fp = Brakeman::FileParser.new(tracker.app_tree, tracker.options[:parser_timeout])
  template_parser = Brakeman::TemplateParser.new(tracker, fp)
  template_parser.parse_template path, path.read
  tracker.add_errors(fp.errors)
  process_template fp.file_list.first

  @processor.process_template_alias tracker.templates[template_name]

  rescan = Set.new

  #Search for processed template and process it.
  #Search for rendered versions of template and re-render (if necessary)
  tracker.templates.each do |_name, template|
    if template.file == path or template.file.nil?
      next unless template.render_path and template.name.to_sym == template_name.to_sym

      template.render_path.each do |from|
        case from[:type]
        when :template
          rescan << [:template, from[:name]]
        when :controller
          rescan << [:controller, from[:class], from[:method]]
        end
      end
    end
  end

  rescan.each do |r|
    if r[0] == :controller
      controller = tracker.controllers[r[1]]

      controller.src.each do |file, src|
        unless @paths.include? file
          @processor.process_controller_alias controller.name, src, r[2], file
        end
      end
    elsif r[0] == :template
      template = tracker.templates[r[1]]

      rescan_template template.file
    end
  end

  @reindex << :templates
end