summaryrefslogtreecommitdiff
path: root/lib/api/helpers.rb
blob: a72044e8058d2c7cee5373a50640a626661e80a9 (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
module API
  module Helpers
    PRIVATE_TOKEN_HEADER = "HTTP_PRIVATE_TOKEN"
    PRIVATE_TOKEN_PARAM = :private_token
    SUDO_HEADER ="HTTP_SUDO"
    SUDO_PARAM = :sudo

    def parse_boolean(value)
      [ true, 1, '1', 't', 'T', 'true', 'TRUE', 'on', 'ON' ].include?(value)
    end

    def current_user
      private_token = (params[PRIVATE_TOKEN_PARAM] || env[PRIVATE_TOKEN_HEADER]).to_s
      @current_user ||= (User.find_by(authentication_token: private_token) || doorkeeper_guard)

      unless @current_user && Gitlab::UserAccess.allowed?(@current_user)
        return nil
      end

      identifier = sudo_identifier()

      # If the sudo is the current user do nothing
      if identifier && !(@current_user.id == identifier || @current_user.username == identifier)
        render_api_error!('403 Forbidden: Must be admin to use sudo', 403) unless @current_user.is_admin?
        @current_user = User.by_username_or_id(identifier)
        not_found!("No user id or username for: #{identifier}") if @current_user.nil?
      end

      @current_user
    end

    def sudo_identifier()
      identifier ||= params[SUDO_PARAM] || env[SUDO_HEADER]

      # Regex for integers
      if !!(identifier =~ /^[0-9]+$/)
        identifier.to_i
      else
        identifier
      end
    end

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

    def find_project(id)
      project = Project.find_with_namespace(id) || Project.find_by(id: id)

      if project && can?(current_user, :read_project, project)
        project
      else
        nil
      end
    end

    def project_service
      @project_service ||= begin
        underscored_service = params[:service_slug].underscore

        if Service.available_services_names.include?(underscored_service)
          user_project.build_missing_services

          service_method = "#{underscored_service}_service"

          send_service(service_method)
        end
      end

      @project_service || not_found!("Service")
    end

    def send_service(service_method)
      user_project.send(service_method)
    end

    def service_attributes
      @service_attributes ||= project_service.fields.inject([]) do |arr, hash|
        arr << hash[:name].to_sym
      end
    end

    def find_group(id)
      begin
        group = Group.find(id)
      rescue ActiveRecord::RecordNotFound
        group = Group.find_by!(path: id)
      end

      if can?(current_user, :read_group, group)
        group
      else
        forbidden!("#{current_user.username} lacks sufficient "\
        "access to #{group.name}")
      end
    end

    def paginate(relation)
      relation.page(params[:page]).per(params[:per_page].to_i).tap do |data|
        add_pagination_headers(data)
      end
    end

    def authenticate!
      unauthorized! unless current_user
    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!
      forbidden! unless current_user.is_admin?
    end

    def authorize!(action, subject)
      unless abilities.allowed?(current_user, action, subject)
        forbidden!
      end
    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)
      abilities.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? or (params_hash.has_key?(key) and params_hash[key] == false)
          attrs[key] = params_hash[key]
        end
      end
      ActionController::Parameters.new(attrs).permit!
    end

    # Helper method for validating all labels against its names
    def validate_label_params(params)
      errors = {}

      if params[:labels].present?
        params[:labels].split(',').each do |label_name|
          label = user_project.labels.create_with(
            color: Label::DEFAULT_COLOR).find_or_initialize_by(
              title: label_name.strip)

          if label.invalid?
            errors[label.title] = label.errors
          end
        end
      end

      errors
    end

    def validate_access_level?(level)
      Gitlab::Access.options_with_owner.values.include? level.to_i
    end

    def issuable_order_by
      if params["order_by"] == 'updated_at'
        'updated_at'
      else
        'created_at'
      end
    end

    def issuable_sort
      if params["sort"] == 'asc'
        :asc
      else
        :desc
      end
    end

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

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

    # Projects helpers

    def filter_projects(projects)
      # If the archived parameter is passed, limit results accordingly
      if params[:archived].present?
        projects = projects.where(archived: parse_boolean(params[:archived]))
      end

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

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

      projects.reorder(project_order_by => project_sort)
    end

    def project_order_by
      order_fields = %w(id name path created_at updated_at last_activity_at)

      if order_fields.include?(params['order_by'])
        params['order_by']
      else
        'created_at'
      end
    end

    def project_sort
      if params["sort"] == 'asc'
        :asc
      else
        :desc
      end
    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 FileStreamer.new(path)
      end
    end

    private

    def add_pagination_headers(paginated_data)
      header 'X-Total',       paginated_data.total_count.to_s
      header 'X-Total-Pages', paginated_data.total_pages.to_s
      header 'X-Per-Page',    paginated_data.limit_value.to_s
      header 'X-Page',        paginated_data.current_page.to_s
      header 'X-Next-Page',   paginated_data.next_page.to_s
      header 'X-Prev-Page',   paginated_data.prev_page.to_s
      header 'Link',          pagination_links(paginated_data)
    end

    def pagination_links(paginated_data)
      request_url = request.url.split('?').first
      request_params = params.clone
      request_params[:per_page] = paginated_data.limit_value

      links = []

      request_params[:page] = paginated_data.current_page - 1
      links << %(<#{request_url}?#{request_params.to_query}>; rel="prev") unless paginated_data.first_page?

      request_params[:page] = paginated_data.current_page + 1
      links << %(<#{request_url}?#{request_params.to_query}>; rel="next") unless paginated_data.last_page?

      request_params[:page] = 1
      links << %(<#{request_url}?#{request_params.to_query}>; rel="first")

      request_params[:page] = paginated_data.total_pages
      links << %(<#{request_url}?#{request_params.to_query}>; rel="last")

      links.join(', ')
    end

    def abilities
      @abilities ||= begin
                       abilities = Six.new
                       abilities << Ability
                       abilities
                     end
    end

    def secret_token
      File.read(Gitlab.config.gitlab_shell.secret_file).chomp
    end

    def handle_member_errors(errors)
      error!(errors[:access_level], 422) if errors[:access_level].any?
      not_found!(errors)
    end
  end
end