Rate-limit username and avatar changes

client/views/account/avatar/prompt.coffee

@@ -38,11 +38,17 @@ Template.avatarPrompt.helpers
 Template.avatarPrompt.events
 	'click .select-service': ->
 		if @service is 'initials'
-			Meteor.call 'resetAvatar'
-			toastr.success t('Avatar_changed_successfully')
+			Meteor.call 'resetAvatar', (err) ->
+				if err?.details?.timeToReset?
+					toastr.error t('Error_too_many_requests', parseInt(err.details.timeToReset / 1000))
+				else
+					toastr.success t('Avatar_changed_successfully')
 		else
-			Meteor.call 'setAvatarFromService', @blob, @contentType, @service, ->
-				toastr.success t('Avatar_changed_successfully')
+			Meteor.call 'setAvatarFromService', @blob, @contentType, @service, (err) ->
+				if err?.details?.timeToReset?
+					toastr.error t('Error_too_many_requests', parseInt(err.details.timeToReset / 1000))
+				else
+					toastr.success t('Avatar_changed_successfully')
 
 	'click .login-with-service': (event, template) ->
 		loginWithService = "loginWith#{_.capitalize(this)}"

i18n/en.i18n.json

@@ -105,6 +105,7 @@
   "Enter_info" : "Enter your information",
   "Enter_to" : "Enter to",
   "Error_changing_password" : "Error changing password",
+  "Error_too_many_requests" : "Error, too many requests. Please slow down. You must wait %s seconds before trying again",
   "Esc_to" : "Esc to",
   "False" : "False",
   "Favorites" : "Favorites",

packages/rocketchat-lib/lib/rateLimiter.coffee

 # Limit sending messages to 5 messages per second per user
 DDPRateLimiter.addRule
 	userId: (userId) ->
-		return Meteor.users.findOne(userId)?.username isnt RocketChat.settings.get('RocketBot_Name')
+		return RocketChat.models.Users.findOneById(userId)?.username isnt RocketChat.settings.get('RocketBot_Name')
 	clientAddress: null
 	type: 'method'
 	name: 'sendMessage'
@@ -9,3 +9,32 @@ DDPRateLimiter.addRule
 		return true
 , 5, 1000
 
+
+# Limit changing avatar once per minute
+DDPRateLimiter.addRule
+	userId: -> return true
+	connectionId: -> return true
+	clientAddress: null
+	type: 'method'
+	name: 'setAvatarFromService'
+, 1, 60000
+
+
+# Limit changing avatar once per minute
+DDPRateLimiter.addRule
+	userId: -> return true
+	connectionId: -> return true
+	clientAddress: null
+	type: 'method'
+	name: 'resetAvatar'
+, 1, 60000
+
+# Limit setting username once per minute
+DDPRateLimiter.addRule
+	userId: -> return not RocketChat.authz.hasPermission( user._id, 'edit-other-user-info')
+	connectionId: -> return true
+	clientAddress: null
+	type: 'method'
+	name: 'setUsername'
+, 1, 60000
+

packages/rocketchat-lib/server/functions/setUsername.coffee

@@ -31,6 +31,6 @@ RocketChat.setUsername = (user, username) ->
 		RocketChat.models.Subscriptions.setNameForDirectRoomsWithOldName previousUsername, username
 
 	# Set new username
-	Meteor.users.update { _id: user._id }, { $set: { username: username } }
+	RocketChat.models.Users.setUsername user._id, username
 	user.username = username
 	return user