Module: Discordrb::API

Defined in:
lib/discordrb/api.rb

Overview

List of methods representing endpoints in Discord's API

Defined Under Namespace

Modules: Application, Channel, Interaction, Invite, Server, User, Webhook

Constant Summary collapse

APIBASE =

The base URL of the Discord REST API.

'https://discord.com/api/v9'
CDN_URL =

The URL of Discord's CDN

'https://cdn.discordapp.com'

Class Method Summary collapse

Class Method Details

.achievement_icon_url(application_id, achievement_id, icon_hash, format = 'webp') ⇒ Object

Make an achievement icon URL from application ID, achievement ID, and icon hash



222
223
224
# File 'lib/discordrb/api.rb', line 222

def achievement_icon_url(application_id, achievement_id, icon_hash, format = 'webp')
  "#{cdn_url}/app-assets/#{application_id}/achievements/#{achievement_id}/icons/#{icon_hash}.#{format}"
end

.acknowledge_message(token, channel_id, message_id) ⇒ Object

Acknowledge that a message has been received The last acknowledged message will be sent in the ready packet, so this is an easy way to catch up on messages



298
299
300
301
302
303
304
305
306
307
# File 'lib/discordrb/api.rb', line 298

def acknowledge_message(token, channel_id, message_id)
  request(
    :channels_cid_messages_mid_ack,
    nil, # This endpoint is unavailable for bot accounts and thus isn't subject to its rate limit requirements.
    :post,
    "#{api_base}/channels/#{channel_id}/messages/#{message_id}/ack",
    nil,
    Authorization: token
  )
end

.api_baseString

Returns the currently used API base URL.

Returns:

  • (String)

    the currently used API base URL.



20
21
22
# File 'lib/discordrb/api.rb', line 20

def api_base
  @api_base || APIBASE
end

.api_base=(value) ⇒ Object

Sets the API base URL to something.



25
26
27
# File 'lib/discordrb/api.rb', line 25

def api_base=(value)
  @api_base = value
end

.app_icon_url(app_id, icon_id, format = 'webp') ⇒ Object

Make an icon URL from application and icon IDs



192
193
194
# File 'lib/discordrb/api.rb', line 192

def app_icon_url(app_id, icon_id, format = 'webp')
  "#{cdn_url}/app-icons/#{app_id}/#{icon_id}.#{format}"
end

.asset_url(application_id, asset_id, format = 'webp') ⇒ Object

Make an asset URL from application and asset IDs



217
218
219
# File 'lib/discordrb/api.rb', line 217

def asset_url(application_id, asset_id, format = 'webp')
  "#{cdn_url}/app-assets/#{application_id}/#{asset_id}.#{format}"
end

Make a banner URL from server and banner IDs



207
208
209
# File 'lib/discordrb/api.rb', line 207

def banner_url(server_id, banner_id, format = 'webp')
  "#{cdn_url}/banners/#{server_id}/#{banner_id}.#{format}"
end

.bot_nameString

Returns the bot name, previously specified using bot_name=.

Returns:



35
36
37
# File 'lib/discordrb/api.rb', line 35

def bot_name
  @bot_name
end

.bot_name=(value) ⇒ Object

Sets the bot name to something. Used in user_agent. For the bot's username, see Profile#username=.



40
41
42
# File 'lib/discordrb/api.rb', line 40

def bot_name=(value)
  @bot_name = value
end

.cdn_urlString

Returns the currently used CDN url.

Returns:

  • (String)

    the currently used CDN url



30
31
32
# File 'lib/discordrb/api.rb', line 30

def cdn_url
  @cdn_url || CDN_URL
end

.create_oauth_application(token, name, redirect_uris) ⇒ Object

Create an OAuth application



259
260
261
262
263
264
265
266
267
268
269
# File 'lib/discordrb/api.rb', line 259

def create_oauth_application(token, name, redirect_uris)
  request(
    :oauth2_applications,
    nil,
    :post,
    "#{api_base}/oauth2/applications",
    { name: name, redirect_uris: redirect_uris }.to_json,
    Authorization: token,
    content_type: :json
  )
end

.emoji_icon_url(emoji_id, format = 'webp') ⇒ Object

Make an emoji icon URL from emoji ID



212
213
214
# File 'lib/discordrb/api.rb', line 212

def emoji_icon_url(emoji_id, format = 'webp')
  "#{cdn_url}/emojis/#{emoji_id}.#{format}"
end

.gateway(token) ⇒ Object

Get the gateway to be used



310
311
312
313
314
315
316
317
318
# File 'lib/discordrb/api.rb', line 310

def gateway(token)
  request(
    :gateway,
    nil,
    :get,
    "#{api_base}/gateway",
    Authorization: token
  )
end

.gateway_bot(token) ⇒ Object

Get the gateway to be used, with additional information for sharding and session start limits



322
323
324
325
326
327
328
329
330
# File 'lib/discordrb/api.rb', line 322

def gateway_bot(token)
  request(
    :gateway_bot,
    nil,
    :get,
    "#{api_base}/gateway/bot",
    Authorization: token
  )
end

.handle_preemptive_rl(headers, mutex, key) ⇒ Object

Handles pre-emptive rate limiting by waiting the given mutex by the difference of the Date header to the X-Ratelimit-Reset header, thus making sure we don't get 429'd in any subsequent requests.



163
164
165
166
167
168
# File 'lib/discordrb/api.rb', line 163

def handle_preemptive_rl(headers, mutex, key)
  Discordrb::LOGGER.ratelimit "RL bucket depletion detected! Date: #{headers[:date]} Reset: #{headers[:x_ratelimit_reset]}"
  delta = headers[:x_ratelimit_reset_after].to_f
  Discordrb::LOGGER.warn("Locking RL mutex (key: #{key}) for #{delta} seconds pre-emptively")
  sync_wait(delta, mutex)
end

.icon_url(server_id, icon_id, format = 'webp') ⇒ Object

Make an icon URL from server and icon IDs



187
188
189
# File 'lib/discordrb/api.rb', line 187

def icon_url(server_id, icon_id, format = 'webp')
  "#{cdn_url}/icons/#{server_id}/#{icon_id}.#{format}"
end

.login(email, password) ⇒ Object

Login to the server



235
236
237
238
239
240
241
242
243
244
# File 'lib/discordrb/api.rb', line 235

def (email, password)
  request(
    :auth_login,
    nil,
    :post,
    "#{api_base}/auth/login",
    email: email,
    password: password
  )
end

.logout(token) ⇒ Object

Logout from the server



247
248
249
250
251
252
253
254
255
256
# File 'lib/discordrb/api.rb', line 247

def logout(token)
  request(
    :auth_logout,
    nil,
    :post,
    "#{api_base}/auth/logout",
    nil,
    Authorization: token
  )
end

.mutex_wait(mutex) ⇒ Object

Wait for a specified mutex to unlock and do nothing with it afterwards.



72
73
74
75
# File 'lib/discordrb/api.rb', line 72

def mutex_wait(mutex)
  mutex.lock
  mutex.unlock
end

.oauth_application(token) ⇒ Object

Get the bot's OAuth application's information



285
286
287
288
289
290
291
292
293
# File 'lib/discordrb/api.rb', line 285

def oauth_application(token)
  request(
    :oauth2_applications_me,
    nil,
    :get,
    "#{api_base}/oauth2/applications/@me",
    Authorization: token
  )
end

.raw_request(type, attributes) ⇒ Object

Performs a RestClient request.

Parameters:

  • type (Symbol)

    The type of HTTP request to use.

  • attributes (Array)

    The attributes for the request.



80
81
82
83
84
85
86
87
88
89
90
# File 'lib/discordrb/api.rb', line 80

def raw_request(type, attributes)
  RestClient.send(type, *attributes)
rescue RestClient::Forbidden => e
  # HACK: for #request, dynamically inject restclient's response into NoPermission - this allows us to rate limit
  noprm = Discordrb::Errors::NoPermission.new
  noprm.define_singleton_method(:_rc_response) { e.response }
  raise noprm, "The bot doesn't have the required permission to do this!"
rescue RestClient::BadGateway
  Discordrb::LOGGER.warn('Got a 502 while sending a request! Not a big deal, retrying the request')
  retry
end

.request(key, major_parameter, type, *attributes) ⇒ Object

Make an API request, including rate limit handling.



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
# File 'lib/discordrb/api.rb', line 93

def request(key, major_parameter, type, *attributes)
  # Add a custom user agent
  attributes.last[:user_agent] = user_agent if attributes.last.is_a? Hash

  # The most recent Discord rate limit requirements require the support of major parameters, where a particular route
  # and major parameter combination (*not* the HTTP method) uniquely identifies a RL bucket.
  key = [key, major_parameter].freeze

  begin
    mutex = @mutexes[key] ||= Mutex.new

    # Lock and unlock, i.e. wait for the mutex to unlock and don't do anything with it afterwards
    mutex_wait(mutex)

    # If the global mutex happens to be locked right now, wait for that as well.
    mutex_wait(@global_mutex) if @global_mutex.locked?

    response = nil
    begin
      response = raw_request(type, attributes)
    rescue RestClient::Exception => e
      response = e.response

      if response.body && !e.is_a?(RestClient::TooManyRequests)
        data = JSON.parse(response.body)
        err_klass = Discordrb::Errors.error_class_for(data['code'] || 0)
        e = err_klass.new(data['message'], data['errors'])

        Discordrb::LOGGER.error(e.full_message)
      end

      raise e
    rescue Discordrb::Errors::NoPermission => e
      if e.respond_to?(:_rc_response)
        response = e._rc_response
      else
        Discordrb::LOGGER.warn("NoPermission doesn't respond_to? _rc_response!")
      end

      raise e
    ensure
      if response
        handle_preemptive_rl(response.headers, mutex, key) if response.headers[:x_ratelimit_remaining] == '0' && !mutex.locked?
      else
        Discordrb::LOGGER.ratelimit('Response was nil before trying to preemptively rate limit!')
      end
    end
  rescue RestClient::TooManyRequests => e
    # If the 429 is from the global RL, then we have to use the global mutex instead.
    mutex = @global_mutex if e.response.headers[:x_ratelimit_global] == 'true'

    unless mutex.locked?
      response = JSON.parse(e.response)
      wait_seconds = response['retry_after'] ? response['retry_after'].to_f : e.response.headers[:retry_after].to_i
      Discordrb::LOGGER.ratelimit("Locking RL mutex (key: #{key}) for #{wait_seconds} seconds due to Discord rate limiting")
      trace("429 #{key.join(' ')}")

      # Wait the required time synchronized by the mutex (so other incoming requests have to wait) but only do it if
      # the mutex isn't locked already so it will only ever wait once
      sync_wait(wait_seconds, mutex)
    end

    retry
  end

  response
end

.reset_mutexesObject

Resets all rate limit mutexes



61
62
63
64
# File 'lib/discordrb/api.rb', line 61

def reset_mutexes
  @mutexes = {}
  @global_mutex = Mutex.new
end

.role_icon_url(role_id, icon_hash, format = 'webp') ⇒ String

Parameters:

  • role_id (String, Integer)
  • icon_hash (String)
  • format ('webp', 'png', 'jpeg') (defaults to: 'webp')

Returns:



230
231
232
# File 'lib/discordrb/api.rb', line 230

def role_icon_url(role_id, icon_hash, format = 'webp')
  "#{cdn_url}/role-icons/#{role_id}/#{icon_hash}.#{format}"
end

.splash_url(server_id, splash_id, format = 'webp') ⇒ Object

Make a splash URL from server and splash IDs



202
203
204
# File 'lib/discordrb/api.rb', line 202

def splash_url(server_id, splash_id, format = 'webp')
  "#{cdn_url}/splashes/#{server_id}/#{splash_id}.#{format}"
end

.sync_wait(time, mutex) ⇒ Object

Wait a specified amount of time synchronised with the specified mutex.



67
68
69
# File 'lib/discordrb/api.rb', line 67

def sync_wait(time, mutex)
  mutex.synchronize { sleep time }
end

.trace(reason) ⇒ Object

Perform rate limit tracing. All this method does is log the current backtrace to the console with the :ratelimit level.

Parameters:

  • reason (String)

    the reason to include with the backtrace.



173
174
175
176
177
178
179
180
181
182
183
184
# File 'lib/discordrb/api.rb', line 173

def trace(reason)
  unless @trace
    Discordrb::LOGGER.debug("trace was called with reason #{reason}, but tracing is not enabled")
    return
  end

  Discordrb::LOGGER.ratelimit("Trace (#{reason}):")

  caller.each do |str|
    Discordrb::LOGGER.ratelimit(" #{str}")
  end
end

.trace=(value) ⇒ Object

Changes the rate limit tracing behaviour. If rate limit tracing is on, a full backtrace will be logged on every RL hit.

Parameters:

  • value (true, false)

    whether or not to enable rate limit tracing



47
48
49
# File 'lib/discordrb/api.rb', line 47

def trace=(value)
  @trace = value
end

.update_oauth_application(token, name, redirect_uris, description = '', icon = nil) ⇒ Object

Change an OAuth application's properties



272
273
274
275
276
277
278
279
280
281
282
# File 'lib/discordrb/api.rb', line 272

def update_oauth_application(token, name, redirect_uris, description = '', icon = nil)
  request(
    :oauth2_applications,
    nil,
    :put,
    "#{api_base}/oauth2/applications",
    { name: name, redirect_uris: redirect_uris, description: description, icon: icon }.to_json,
    Authorization: token,
    content_type: :json
  )
end

.user_agentObject

Generate a user agent identifying this requester as discordrb.



52
53
54
55
56
57
58
# File 'lib/discordrb/api.rb', line 52

def user_agent
  # This particular string is required by the Discord devs.
  required = "DiscordBot (https://github.com/shardlab/discordrb, v#{Discordrb::VERSION})"
  @bot_name ||= ''

  "#{required} rest-client/#{RestClient::VERSION} #{RUBY_ENGINE}/#{RUBY_VERSION}p#{RUBY_PATCHLEVEL} discordrb/#{Discordrb::VERSION} #{@bot_name}"
end

.validate_token(token) ⇒ Object

Validate a token (this request will fail if the token is invalid)



333
334
335
336
337
338
339
340
341
342
343
# File 'lib/discordrb/api.rb', line 333

def validate_token(token)
  request(
    :auth_login,
    nil,
    :post,
    "#{api_base}/auth/login",
    {}.to_json,
    Authorization: token,
    content_type: :json
  )
end

.voice_regions(token) ⇒ Object

Get a list of available voice regions



346
347
348
349
350
351
352
353
354
355
# File 'lib/discordrb/api.rb', line 346

def voice_regions(token)
  request(
    :voice_regions,
    nil,
    :get,
    "#{api_base}/voice/regions",
    Authorization: token,
    content_type: :json
  )
end

.widget_url(server_id, style = 'shield') ⇒ Object

Make a widget picture URL from server ID



197
198
199
# File 'lib/discordrb/api.rb', line 197

def widget_url(server_id, style = 'shield')
  "#{api_base}/guilds/#{server_id}/widget.png?style=#{style}"
end