about summary refs log tree commit diff
path: root/app/controllers/api/base_controller.rb
blob: c46fde65b2313edaf6864963c4dd7c04c773c1a3 (plain) (blame)
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
# frozen_string_literal: true

class Api::BaseController < ApplicationController
  DEFAULT_STATUSES_LIMIT = 20
  DEFAULT_ACCOUNTS_LIMIT = 40

  include RateLimitHeaders
  include AccessTokenTrackingConcern

  skip_before_action :store_current_location
  skip_before_action :require_functional!, unless: :whitelist_mode?

  before_action :require_authenticated_user!, if: :disallow_unauthenticated_api_access?
  before_action :require_not_suspended!
  before_action :set_cache_headers

  protect_from_forgery with: :null_session

  rescue_from ActiveRecord::RecordInvalid, Mastodon::ValidationError do |e|
    render json: { error: e.to_s }, status: 422
  end

  rescue_from ActiveRecord::RecordNotUnique do
    render json: { error: 'Duplicate record' }, status: 422
  end

  rescue_from Date::Error do
    render json: { error: 'Invalid date supplied' }, status: 422
  end

  rescue_from ActiveRecord::RecordNotFound do
    render json: { error: 'Record not found' }, status: 404
  end

  rescue_from HTTP::Error, Mastodon::UnexpectedResponseError do
    render json: { error: 'Remote data could not be fetched' }, status: 503
  end

  rescue_from OpenSSL::SSL::SSLError do
    render json: { error: 'Remote SSL certificate could not be verified' }, status: 503
  end

  rescue_from Mastodon::NotPermittedError do
    render json: { error: 'This action is not allowed' }, status: 403
  end

  rescue_from Seahorse::Client::NetworkingError do |e|
    Rails.logger.warn "Storage server error: #{e}"
    render json: { error: 'There was a temporary problem serving your request, please try again' }, status: 503
  end

  rescue_from Mastodon::RaceConditionError, Stoplight::Error::RedLight do
    render json: { error: 'There was a temporary problem serving your request, please try again' }, status: 503
  end

  rescue_from Mastodon::RateLimitExceededError do
    render json: { error: I18n.t('errors.429') }, status: 429
  end

  rescue_from ActionController::ParameterMissing do |e|
    render json: { error: e.to_s }, status: 400
  end

  def doorkeeper_unauthorized_render_options(error: nil)
    { json: { error: (error.try(:description) || 'Not authorized') } }
  end

  def doorkeeper_forbidden_render_options(*)
    { json: { error: 'This action is outside the authorized scopes' } }
  end

  protected

  def set_pagination_headers(next_path = nil, prev_path = nil)
    links = []
    links << [next_path, [%w(rel next)]] if next_path
    links << [prev_path, [%w(rel prev)]] if prev_path
    response.headers['Link'] = LinkHeader.new(links) unless links.empty?
  end

  def limit_param(default_limit)
    return default_limit unless params[:limit]

    [params[:limit].to_i.abs, default_limit * 2].min
  end

  def params_slice(*keys)
    params.slice(*keys).permit(*keys)
  end

  def current_resource_owner
    @current_user ||= User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token
  end

  def current_user
    current_resource_owner || super
  rescue ActiveRecord::RecordNotFound
    nil
  end

  def require_authenticated_user!
    render json: { error: 'This method requires an authenticated user' }, status: 401 unless current_user
  end

  def require_not_suspended!
    render json: { error: 'Your login is currently disabled' }, status: 403 if current_user&.account&.suspended?
  end

  def require_user!
    if !current_user
      render json: { error: 'This method requires an authenticated user' }, status: 422
    elsif !current_user.confirmed?
      render json: { error: 'Your login is missing a confirmed e-mail address' }, status: 403
    elsif !current_user.approved?
      render json: { error: 'Your login is currently pending approval' }, status: 403
    elsif !current_user.functional?
      render json: { error: 'Your login is currently disabled' }, status: 403
    else
      update_user_sign_in
    end
  end

  def render_empty
    render json: {}, status: 200
  end

  def authorize_if_got_token!(*scopes)
    doorkeeper_authorize!(*scopes) if doorkeeper_token
  end

  def set_cache_headers
    response.headers['Cache-Control'] = 'no-cache, no-store, max-age=0, must-revalidate'
  end

  def disallow_unauthenticated_api_access?
    authorized_fetch_mode?
  end

  private

  def respond_with_error(code)
    render json: { error: Rack::Utils::HTTP_STATUS_CODES[code] }, status: code
  end
end