summaryrefslogtreecommitdiff
path: root/lib/api/helpers.rb
blob: ddff3c8c1e8e36a05c0ae6b76e49fdc8ca74b2ba (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
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
65
66
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
101
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
128
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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
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
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
module API
  module Helpers
    include Gitlab::Utils
    include Helpers::Pagination

    SUDO_HEADER = "HTTP_SUDO".freeze
    SUDO_PARAM = :sudo

    def declared_params(options = {})
      options = { include_parent_namespaces: false }.merge(options)
      declared(params, options).to_h.symbolize_keys
    end

    def current_user
      return @current_user if defined?(@current_user)

      @current_user = initial_current_user

      sudo!

      @current_user
    end

    def sudo?
      initial_current_user != current_user
    end

    def user_project
      @project ||= find_project!(params[:id])
    end

    def available_labels
      @available_labels ||= LabelsFinder.new(current_user, project_id: user_project.id).execute
    end

    def find_user(id)
      if id =~ /^\d+$/
        User.find_by(id: id)
      else
        User.find_by(username: id)
      end
    end

    def find_project(id)
      if id =~ /^\d+$/
        Project.find_by(id: id)
      else
        Project.find_by_full_path(id)
      end
    end

    def find_project!(id)
      project = find_project(id)

      if can?(current_user, :read_project, project)
        project
      else
        not_found!('Project')
      end
    end

    def find_group(id)
      if id =~ /^\d+$/
        Group.find_by(id: id)
      else
        Group.find_by_full_path(id)
      end
    end

    def find_group!(id)
      group = find_group(id)

      if can?(current_user, :read_group, group)
        group
      else
        not_found!('Group')
      end
    end

    def find_project_label(id)
      label = available_labels.find_by_id(id) || available_labels.find_by_title(id)
      label || not_found!('Label')
    end

    def find_project_issue(iid)
      IssuesFinder.new(current_user, project_id: user_project.id).find_by!(iid: iid)
    end

    def find_project_merge_request(iid)
      MergeRequestsFinder.new(current_user, project_id: user_project.id).find_by!(iid: iid)
    end

    def find_project_snippet(id)
      finder_params = { filter: :by_project, project: user_project }
      SnippetsFinder.new.execute(current_user, finder_params).find(id)
    end

    def find_merge_request_with_access(iid, access_level = :read_merge_request)
      merge_request = user_project.merge_requests.find_by!(iid: iid)
      authorize! access_level, merge_request
      merge_request
    end

    def authenticate!
      unauthorized! unless current_user && can?(current_user, :access_api)
    end

    def authenticate_non_get!
      authenticate! unless %w[GET HEAD].include?(route.request_method)
    end

    def authenticate_by_gitlab_shell_token!
      input = params['secret_token'].try(:chomp)
      unless Devise.secure_compare(secret_token, input)
        unauthorized!
      end
    end

    def authenticated_as_admin!
      authenticate!
      forbidden! unless current_user.admin?
    end

    def authorize!(action, subject = :global)
      forbidden! unless can?(current_user, action, subject)
    end

    def authorize_push_project
      authorize! :push_code, user_project
    end

    def authorize_admin_project
      authorize! :admin_project, user_project
    end

    def require_gitlab_workhorse!
      unless env['HTTP_GITLAB_WORKHORSE'].present?
        forbidden!('Request should be executed via GitLab Workhorse')
      end
    end

    def can?(object, action, subject = :global)
      Ability.allowed?(object, action, subject)
    end

    # Checks the occurrences of required attributes, each attribute must be present in the params hash
    # or a Bad Request error is invoked.
    #
    # Parameters:
    #   keys (required) - A hash consisting of keys that must be present
    def required_attributes!(keys)
      keys.each do |key|
        bad_request!(key) unless params[key].present?
      end
    end

    def attributes_for_keys(keys, custom_params = nil)
      params_hash = custom_params || params
      attrs = {}
      keys.each do |key|
        if params_hash[key].present? || (params_hash.has_key?(key) && params_hash[key] == false)
          attrs[key] = params_hash[key]
        end
      end
      ActionController::Parameters.new(attrs).permit!
    end

    def filter_by_iid(items, iid)
      items.where(iid: iid)
    end

    def filter_by_search(items, text)
      items.search(text)
    end

    # error helpers

    def forbidden!(reason = nil)
      message = ['403 Forbidden']
      message << " - #{reason}" if reason
      render_api_error!(message.join(' '), 403)
    end

    def bad_request!(attribute)
      message = ["400 (Bad request)"]
      message << "\"" + attribute.to_s + "\" not given"
      render_api_error!(message.join(' '), 400)
    end

    def not_found!(resource = nil)
      message = ["404"]
      message << resource if resource
      message << "Not Found"
      render_api_error!(message.join(' '), 404)
    end

    def unauthorized!
      render_api_error!('401 Unauthorized', 401)
    end

    def not_allowed!
      render_api_error!('405 Method Not Allowed', 405)
    end

    def conflict!(message = nil)
      render_api_error!(message || '409 Conflict', 409)
    end

    def file_to_large!
      render_api_error!('413 Request Entity Too Large', 413)
    end

    def not_modified!
      render_api_error!('304 Not Modified', 304)
    end

    def no_content!
      render_api_error!('204 No Content', 204)
    end

    def accepted!
      render_api_error!('202 Accepted', 202)
    end

    def render_validation_error!(model)
      if model.errors.any?
        render_api_error!(model.errors.messages || '400 Bad Request', 400)
      end
    end

    def render_spam_error!
      render_api_error!({ error: 'Spam detected' }, 400)
    end

    def render_api_error!(message, status)
      error!({ 'message' => message }, status, header)
    end

    def handle_api_exception(exception)
      if sentry_enabled? && report_exception?(exception)
        define_params_for_grape_middleware
        sentry_context
        Raven.capture_exception(exception)
      end

      # lifted from https://github.com/rails/rails/blob/master/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb#L60
      trace = exception.backtrace

      message = "\n#{exception.class} (#{exception.message}):\n"
      message << exception.annoted_source_code.to_s if exception.respond_to?(:annoted_source_code)
      message << "  " << trace.join("\n  ")

      API.logger.add Logger::FATAL, message
      rack_response({ 'message' => '500 Internal Server Error' }.to_json, 500)
    end

    # project helpers

    def filter_projects(projects)
      if params[:membership]
        projects = projects.merge(current_user.authorized_projects)
      end

      if params[:owned]
        projects = projects.merge(current_user.owned_projects)
      end

      if params[:starred]
        projects = projects.merge(current_user.starred_projects)
      end

      if params[:search].present?
        projects = projects.search(params[:search])
      end

      if params[:visibility].present?
        projects = projects.search_by_visibility(params[:visibility])
      end

      projects = projects.where(archived: params[:archived])
      projects.reorder(params[:order_by] => params[:sort])
    end

    # file helpers

    def uploaded_file(field, uploads_path)
      if params[field]
        bad_request!("#{field} is not a file") unless params[field].respond_to?(:filename)
        return params[field]
      end

      return nil unless params["#{field}.path"] && params["#{field}.name"]

      # sanitize file paths
      # this requires all paths to exist
      required_attributes! %W(#{field}.path)
      uploads_path = File.realpath(uploads_path)
      file_path = File.realpath(params["#{field}.path"])
      bad_request!('Bad file path') unless file_path.start_with?(uploads_path)

      UploadedFile.new(
        file_path,
        params["#{field}.name"],
        params["#{field}.type"] || 'application/octet-stream',
      )
    end

    def present_file!(path, filename, content_type = 'application/octet-stream')
      filename ||= File.basename(path)
      header['Content-Disposition'] = "attachment; filename=#{filename}"
      header['Content-Transfer-Encoding'] = 'binary'
      content_type content_type

      # Support download acceleration
      case headers['X-Sendfile-Type']
      when 'X-Sendfile'
        header['X-Sendfile'] = path
        body
      else
        file path
      end
    end

    private

    def private_token
      params[APIGuard::PRIVATE_TOKEN_PARAM] || env[APIGuard::PRIVATE_TOKEN_HEADER]
    end

    def warden
      env['warden']
    end

    # Check the Rails session for valid authentication details
    #
    # Until CSRF protection is added to the API, disallow this method for
    # state-changing endpoints
    def find_user_from_warden
      warden.try(:authenticate) if %w[GET HEAD].include?(env['REQUEST_METHOD'])
    end

    def initial_current_user
      return @initial_current_user if defined?(@initial_current_user)
      Gitlab::Auth::UniqueIpsLimiter.limit_user! do
        @initial_current_user ||= find_user_by_private_token(scopes: @scopes)
        @initial_current_user ||= doorkeeper_guard(scopes: @scopes)
        @initial_current_user ||= find_user_from_warden

        unless @initial_current_user && Gitlab::UserAccess.new(@initial_current_user).allowed?
          @initial_current_user = nil
        end

        @initial_current_user
      end
    end

    def sudo!
      return unless sudo_identifier
      return unless initial_current_user

      unless initial_current_user.admin?
        forbidden!('Must be admin to use sudo')
      end

      # Only private tokens should be used for the SUDO feature
      unless private_token == initial_current_user.private_token
        forbidden!('Private token must be specified in order to use sudo')
      end

      sudoed_user = find_user(sudo_identifier)

      if sudoed_user
        @current_user = sudoed_user
      else
        not_found!("No user id or username for: #{sudo_identifier}")
      end
    end

    def sudo_identifier
      @sudo_identifier ||= params[SUDO_PARAM] || env[SUDO_HEADER]
    end

    def secret_token
      Gitlab::Shell.secret_token
    end

    def send_git_blob(repository, blob)
      env['api.format'] = :txt
      content_type 'text/plain'
      header(*Gitlab::Workhorse.send_git_blob(repository, blob))
    end

    def send_git_archive(repository, ref:, format:)
      header(*Gitlab::Workhorse.send_git_archive(repository, ref: ref, format: format))
    end

    # The Grape Error Middleware only has access to env but no params. We workaround this by
    # defining a method that returns the right value.
    def define_params_for_grape_middleware
      self.define_singleton_method(:params) { Rack::Request.new(env).params.symbolize_keys }
    end

    # We could get a Grape or a standard Ruby exception. We should only report anything that
    # is clearly an error.
    def report_exception?(exception)
      return true unless exception.respond_to?(:status)

      exception.status == 500
    end
  end
end