app/controllers/users_controller.rb

   1 class UsersController < ApplicationController
   2   layout "site"
   3
   4   skip_before_action :verify_authenticity_token, :only => [:auth_success]
   5   before_action :disable_terms_redirect, :only => [:terms, :save, :logout]
   6   before_action :authorize_web
   7   before_action :set_locale
   8   before_action :check_database_readable
   9
  10   authorize_resource
  11
  12   before_action :require_self, :only => [:account]
  13   before_action :check_database_writable, :only => [:new, :account, :confirm, :confirm_email, :lost_password, :reset_password, :go_public]
  14   before_action :require_cookies, :only => [:new, :login, :confirm]
  15   before_action :lookup_user_by_name, :only => [:set_status, :destroy]
  16   before_action :allow_thirdparty_images, :only => [:show, :account]
  17
  18   def terms
  19     @legale = params[:legale] || OSM.ip_to_country(request.remote_ip) || Settings.default_legale
  20     @text = OSM.legal_text_for_country(@legale)
  21
  22     if request.xhr?
  23       render :partial => "terms"
  24     else
  25       @title = t "users.terms.title"
  26
  27       if current_user&.terms_agreed?
  28         # Already agreed to terms, so just show settings
  29         redirect_to :action => :account, :display_name => current_user.display_name
  30       elsif current_user.nil? && session[:new_user].nil?
  31         redirect_to :action => :login, :referer => request.fullpath
  32       end
  33     end
  34   end
  35
  36   def save
  37     @title = t "users.new.title"
  38
  39     if params[:decline] || !(params[:read_tou] && params[:read_ct])
  40       if current_user
  41         current_user.terms_seen = true
  42
  43         flash[:notice] = t("users.new.terms declined", :url => t("users.new.terms declined url")).html_safe if current_user.save
  44
  45         if params[:referer]
  46           redirect_to safe_referer(params[:referer])
  47         else
  48           redirect_to :action => :account, :display_name => current_user.display_name
  49         end
  50       elsif params[:decline]
  51         redirect_to t("users.terms.declined")
  52       else
  53         redirect_to :action => :terms
  54       end
  55     elsif current_user
  56       unless current_user.terms_agreed?
  57         current_user.consider_pd = params[:user][:consider_pd]
  58         current_user.tou_agreed = Time.now.getutc
  59         current_user.terms_agreed = Time.now.getutc
  60         current_user.terms_seen = true
  61
  62         flash[:notice] = t "users.new.terms accepted" if current_user.save
  63       end
  64
  65       if params[:referer]
  66         redirect_to safe_referer(params[:referer])
  67       else
  68         redirect_to :action => :account, :display_name => current_user.display_name
  69       end
  70     else
  71       self.current_user = session.delete(:new_user)
  72
  73       if check_signup_allowed(current_user.email)
  74         current_user.data_public = true
  75         current_user.description = "" if current_user.description.nil?
  76         current_user.creation_ip = request.remote_ip
  77         current_user.languages = http_accept_language.user_preferred_languages
  78         current_user.terms_agreed = Time.now.getutc
  79         current_user.tou_agreed = Time.now.getutc
  80         current_user.terms_seen = true
  81
  82         if current_user.auth_uid.blank?
  83           current_user.auth_provider = nil
  84           current_user.auth_uid = nil
  85         end
  86
  87         if current_user.save
  88           flash[:piwik_goal] = PIWIK["goals"]["signup"] if defined?(PIWIK)
  89
  90           referer = welcome_path
  91
  92           begin
  93             uri = URI(session[:referer])
  94             %r{map=(.*)/(.*)/(.*)}.match(uri.fragment) do |m|
  95               editor = Rack::Utils.parse_query(uri.query).slice("editor")
  96               referer = welcome_path({ "zoom" => m[1],
  97                                        "lat" => m[2],
  98                                        "lon" => m[3] }.merge(editor))
  99             end
 100           rescue StandardError
 101             # Use default
 102           end
 103
 104           if current_user.status == "active"
 105             session[:referer] = referer
 106             successful_login(current_user)
 107           else
 108             session[:token] = current_user.tokens.create.token
 109             UserMailer.signup_confirm(current_user, current_user.tokens.create(:referer => referer)).deliver_later
 110             redirect_to :action => "confirm", :display_name => current_user.display_name
 111           end
 112         else
 113           render :action => "new", :referer => params[:referer]
 114         end
 115       end
 116     end
 117   end
 118
 119   def account
 120     @tokens = current_user.oauth_tokens.authorized
 121
 122     append_content_security_policy_directives(
 123       :form_action => %w[accounts.google.com *.facebook.com login.live.com github.com meta.wikimedia.org]
 124     )
 125
 126     if request.post?
 127       if params[:user][:auth_provider].blank? ||
 128          (params[:user][:auth_provider] == current_user.auth_provider &&
 129           params[:user][:auth_uid] == current_user.auth_uid)
 130         update_user(current_user, params)
 131         redirect_to user_account_url(current_user) if current_user.errors.count.zero?
 132       else
 133         session[:new_user_settings] = params
 134         redirect_to auth_url(params[:user][:auth_provider], params[:user][:auth_uid]), :status => :temporary_redirect
 135       end
 136     elsif errors = session.delete(:user_errors)
 137       errors.each do |attribute, error|
 138         current_user.errors.add(attribute, error)
 139       end
 140     end
 141     @title = t "users.account.title"
 142   end
 143
 144   def go_public
 145     current_user.data_public = true
 146     current_user.save
 147     flash[:notice] = t "users.go_public.flash success"
 148     redirect_to :action => "account", :display_name => current_user.display_name
 149   end
 150
 151   def lost_password
 152     @title = t "users.lost_password.title"
 153
 154     if request.post?
 155       user = User.visible.find_by(:email => params[:email])
 156
 157       if user.nil?
 158         users = User.visible.where("LOWER(email) = LOWER(?)", params[:email])
 159
 160         user = users.first if users.count == 1
 161       end
 162
 163       if user
 164         token = user.tokens.create
 165         UserMailer.lost_password(user, token).deliver_later
 166         flash[:notice] = t "users.lost_password.notice email on way"
 167         redirect_to login_path
 168       else
 169         flash.now[:error] = t "users.lost_password.notice email cannot find"
 170       end
 171     end
 172   end
 173
 174   def reset_password
 175     @title = t "users.reset_password.title"
 176
 177     if params[:token]
 178       token = UserToken.find_by(:token => params[:token])
 179
 180       if token
 181         self.current_user = token.user
 182
 183         if params[:user]
 184           current_user.pass_crypt = params[:user][:pass_crypt]
 185           current_user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
 186           current_user.status = "active" if current_user.status == "pending"
 187           current_user.email_valid = true
 188
 189           if current_user.save
 190             token.destroy
 191             session[:fingerprint] = current_user.fingerprint
 192             flash[:notice] = t "users.reset_password.flash changed"
 193             successful_login(current_user)
 194           end
 195         end
 196       else
 197         flash[:error] = t "users.reset_password.flash token bad"
 198         redirect_to :action => "lost_password"
 199       end
 200     else
 201       head :bad_request
 202     end
 203   end
 204
 205   def new
 206     @title = t "users.new.title"
 207     @referer = if params[:referer]
 208                  safe_referer(params[:referer])
 209                else
 210                  session[:referer]
 211                end
 212
 213     append_content_security_policy_directives(
 214       :form_action => %w[accounts.google.com *.facebook.com login.live.com github.com meta.wikimedia.org]
 215     )
 216
 217     if current_user
 218       # The user is logged in already, so don't show them the signup
 219       # page, instead send them to the home page
 220       if @referer
 221         redirect_to @referer
 222       else
 223         redirect_to :controller => "site", :action => "index"
 224       end
 225     elsif params.key?(:auth_provider) && params.key?(:auth_uid)
 226       self.current_user = User.new(:email => params[:email],
 227                                    :email_confirmation => params[:email],
 228                                    :display_name => params[:nickname],
 229                                    :auth_provider => params[:auth_provider],
 230                                    :auth_uid => params[:auth_uid])
 231
 232       flash.now[:notice] = render_to_string :partial => "auth_association"
 233     else
 234       check_signup_allowed
 235
 236       self.current_user = User.new
 237     end
 238   end
 239
 240   def create
 241     self.current_user = User.new(user_params)
 242
 243     if check_signup_allowed(current_user.email)
 244       session[:referer] = safe_referer(params[:referer]) if params[:referer]
 245
 246       Rails.logger.info "create: #{session[:referer]}"
 247
 248       current_user.status = "pending"
 249
 250       if current_user.auth_provider.present? && current_user.pass_crypt.empty?
 251         # We are creating an account with external authentication and
 252         # no password was specified so create a random one
 253         current_user.pass_crypt = SecureRandom.base64(16)
 254         current_user.pass_crypt_confirmation = current_user.pass_crypt
 255       end
 256
 257       if current_user.invalid?
 258         # Something is wrong with a new user, so rerender the form
 259         render :action => "new"
 260       elsif current_user.auth_provider.present?
 261         # Verify external authenticator before moving on
 262         session[:new_user] = current_user
 263         redirect_to auth_url(current_user.auth_provider, current_user.auth_uid), :status => :temporary_redirect
 264       else
 265         # Save the user record
 266         session[:new_user] = current_user
 267         redirect_to :action => :terms
 268       end
 269     end
 270   end
 271
 272   def login
 273     append_content_security_policy_directives(
 274       :form_action => %w[*]
 275     )
 276
 277     session[:referer] = safe_referer(params[:referer]) if params[:referer]
 278
 279     if request.post?
 280       session[:remember_me] ||= params[:remember_me]
 281       password_authentication(params[:username], params[:password])
 282     end
 283   end
 284
 285   def logout
 286     @title = t "users.logout.title"
 287
 288     if request.post?
 289       if session[:token]
 290         token = UserToken.find_by(:token => session[:token])
 291         token&.destroy
 292         session.delete(:token)
 293       end
 294       session.delete(:user)
 295       session_expires_automatically
 296       if params[:referer]
 297         redirect_to safe_referer(params[:referer])
 298       else
 299         redirect_to :controller => "site", :action => "index"
 300       end
 301     end
 302   end
 303
 304   def confirm
 305     if request.post?
 306       token = UserToken.find_by(:token => params[:confirm_string])
 307       if token&.user&.active?
 308         flash[:error] = t("users.confirm.already active")
 309         redirect_to login_path
 310       elsif !token || token.expired?
 311         flash[:error] = t("users.confirm.unknown token")
 312         redirect_to :action => "confirm"
 313       else
 314         user = token.user
 315         user.status = "active"
 316         user.email_valid = true
 317         flash[:notice] = gravatar_status_message(user) if gravatar_enable(user)
 318         user.save!
 319         referer = safe_referer(token.referer) if token.referer
 320         token.destroy
 321
 322         if session[:token]
 323           token = UserToken.find_by(:token => session[:token])
 324           session.delete(:token)
 325         else
 326           token = nil
 327         end
 328
 329         if token.nil? || token.user != user
 330           flash[:notice] = t("users.confirm.success")
 331           redirect_to login_path(:referer => referer)
 332         else
 333           token.destroy
 334
 335           session[:user] = user.id
 336           session[:fingerprint] = user.fingerprint
 337
 338           redirect_to referer || welcome_path
 339         end
 340       end
 341     else
 342       user = User.find_by(:display_name => params[:display_name])
 343
 344       redirect_to root_path if user.nil? || user.active?
 345     end
 346   end
 347
 348   def confirm_resend
 349     user = User.find_by(:display_name => params[:display_name])
 350     token = UserToken.find_by(:token => session[:token])
 351
 352     if user.nil? || token.nil? || token.user != user
 353       flash[:error] = t "users.confirm_resend.failure", :name => params[:display_name]
 354     else
 355       UserMailer.signup_confirm(user, user.tokens.create).deliver_later
 356       flash[:notice] = t "users.confirm_resend.success_html", :email => user.email, :sender => Settings.support_email
 357     end
 358
 359     redirect_to login_path
 360   end
 361
 362   def confirm_email
 363     if request.post?
 364       token = UserToken.find_by(:token => params[:confirm_string])
 365       if token&.user&.new_email?
 366         self.current_user = token.user
 367         current_user.email = current_user.new_email
 368         current_user.new_email = nil
 369         current_user.email_valid = true
 370         gravatar_enabled = gravatar_enable(current_user)
 371         if current_user.save
 372           flash[:notice] = if gravatar_enabled
 373                              "#{t('users.confirm_email.success')} #{gravatar_status_message(current_user)}"
 374                            else
 375                              t("users.confirm_email.success")
 376                            end
 377         else
 378           flash[:errors] = current_user.errors
 379         end
 380         current_user.tokens.delete_all
 381         session[:user] = current_user.id
 382         session[:fingerprint] = current_user.fingerprint
 383         redirect_to :action => "account", :display_name => current_user.display_name
 384       elsif token
 385         flash[:error] = t "users.confirm_email.failure"
 386         redirect_to :action => "account", :display_name => token.user.display_name
 387       else
 388         flash[:error] = t "users.confirm_email.unknown_token"
 389       end
 390     end
 391   end
 392
 393   def show
 394     @user = User.find_by(:display_name => params[:display_name])
 395
 396     if @user &&
 397        (@user.visible? || current_user&.administrator?)
 398       @title = @user.display_name
 399     else
 400       render_unknown_user params[:display_name]
 401     end
 402   end
 403
 404   ##
 405   # sets a user's status
 406   def set_status
 407     @user.status = params[:status]
 408     @user.save
 409     redirect_to user_path(:display_name => params[:display_name])
 410   end
 411
 412   ##
 413   # delete a user, marking them as deleted and removing personal data
 414   def destroy
 415     @user.delete
 416     redirect_to user_path(:display_name => params[:display_name])
 417   end
 418
 419   ##
 420   # display a list of users matching specified criteria
 421   def index
 422     if request.post?
 423       ids = params[:user].keys.collect(&:to_i)
 424
 425       User.where(:id => ids).update_all(:status => "confirmed") if params[:confirm]
 426       User.where(:id => ids).update_all(:status => "deleted") if params[:hide]
 427
 428       redirect_to url_for(:status => params[:status], :ip => params[:ip], :page => params[:page])
 429     else
 430       @params = params.permit(:status, :ip)
 431
 432       conditions = {}
 433       conditions[:status] = @params[:status] if @params[:status]
 434       conditions[:creation_ip] = @params[:ip] if @params[:ip]
 435
 436       @user_pages, @users = paginate(:users,
 437                                      :conditions => conditions,
 438                                      :order => :id,
 439                                      :per_page => 50)
 440     end
 441   end
 442
 443   ##
 444   # omniauth success callback
 445   def auth_success
 446     auth_info = request.env["omniauth.auth"]
 447
 448     provider = auth_info[:provider]
 449     uid = auth_info[:uid]
 450     name = auth_info[:info][:name]
 451     email = auth_info[:info][:email]
 452
 453     case provider
 454     when "openid"
 455       email_verified = uid.match(%r{https://www.google.com/accounts/o8/id?(.*)}) ||
 456                        uid.match(%r{https://me.yahoo.com/(.*)})
 457     when "google", "facebook"
 458       email_verified = true
 459     else
 460       email_verified = false
 461     end
 462
 463     if settings = session.delete(:new_user_settings)
 464       current_user.auth_provider = provider
 465       current_user.auth_uid = uid
 466
 467       update_user(current_user, settings)
 468
 469       flash.discard
 470
 471       session[:user_errors] = current_user.errors.as_json
 472
 473       redirect_to :action => "account", :display_name => current_user.display_name
 474     elsif session[:new_user]
 475       session[:new_user].auth_provider = provider
 476       session[:new_user].auth_uid = uid
 477
 478       session[:new_user].status = "active" if email_verified && email == session[:new_user].email
 479
 480       redirect_to :action => "terms"
 481     else
 482       user = User.find_by(:auth_provider => provider, :auth_uid => uid)
 483
 484       if user.nil? && provider == "google"
 485         openid_url = auth_info[:extra][:id_info]["openid_id"]
 486         user = User.find_by(:auth_provider => "openid", :auth_uid => openid_url) if openid_url
 487         user&.update(:auth_provider => provider, :auth_uid => uid)
 488       end
 489
 490       if user
 491         case user.status
 492         when "pending"
 493           unconfirmed_login(user)
 494         when "active", "confirmed"
 495           successful_login(user, request.env["omniauth.params"]["referer"])
 496         when "suspended"
 497           failed_login t("users.login.account is suspended", :webmaster => "mailto:#{Settings.support_email}").html_safe
 498         else
 499           failed_login t("users.login.auth failure")
 500         end
 501       else
 502         redirect_to :action => "new", :nickname => name, :email => email,
 503                     :auth_provider => provider, :auth_uid => uid
 504       end
 505     end
 506   end
 507
 508   ##
 509   # omniauth failure callback
 510   def auth_failure
 511     flash[:error] = t("users.auth_failure.#{params[:message]}")
 512     redirect_to params[:origin] || login_url
 513   end
 514
 515   private
 516
 517   ##
 518   # handle password authentication
 519   def password_authentication(username, password)
 520     if user = User.authenticate(:username => username, :password => password)
 521       successful_login(user)
 522     elsif user = User.authenticate(:username => username, :password => password, :pending => true)
 523       unconfirmed_login(user)
 524     elsif User.authenticate(:username => username, :password => password, :suspended => true)
 525       failed_login t("users.login.account is suspended", :webmaster => "mailto:#{Settings.support_email}").html_safe, username
 526     else
 527       failed_login t("users.login.auth failure"), username
 528     end
 529   end
 530
 531   ##
 532   # return the URL to use for authentication
 533   def auth_url(provider, uid, referer = nil)
 534     params = { :provider => provider }
 535
 536     params[:openid_url] = openid_expand_url(uid) if provider == "openid"
 537
 538     if referer.nil?
 539       params[:origin] = request.path
 540     else
 541       params[:origin] = "#{request.path}?referer=#{CGI.escape(referer)}"
 542       params[:referer] = referer
 543     end
 544
 545     auth_path(params)
 546   end
 547
 548   ##
 549   # special case some common OpenID providers by applying heuristics to
 550   # try and come up with the correct URL based on what the user entered
 551   def openid_expand_url(openid_url)
 552     if openid_url.nil?
 553       nil
 554     elsif openid_url.match(%r{(.*)gmail.com(/?)$}) || openid_url.match(%r{(.*)googlemail.com(/?)$})
 555       # Special case gmail.com as it is potentially a popular OpenID
 556       # provider and, unlike yahoo.com, where it works automatically, Google
 557       # have hidden their OpenID endpoint somewhere obscure this making it
 558       # somewhat less user friendly.
 559       "https://www.google.com/accounts/o8/id"
 560     else
 561       openid_url
 562     end
 563   end
 564
 565   ##
 566   # process a successful login
 567   def successful_login(user, referer = nil)
 568     session[:user] = user.id
 569     session[:fingerprint] = user.fingerprint
 570     session_expires_after 28.days if session[:remember_me]
 571
 572     target = referer || session[:referer] || url_for(:controller => :site, :action => :index)
 573
 574     # The user is logged in, so decide where to send them:
 575     #
 576     # - If they haven't seen the contributor terms, send them there.
 577     # - If they have a block on them, show them that.
 578     # - If they were referred to the login, send them back there.
 579     # - Otherwise, send them to the home page.
 580     if !user.terms_seen
 581       redirect_to :action => :terms, :referer => target
 582     elsif user.blocked_on_view
 583       redirect_to user.blocked_on_view, :referer => target
 584     else
 585       redirect_to target
 586     end
 587
 588     session.delete(:remember_me)
 589     session.delete(:referer)
 590   end
 591
 592   ##
 593   # process a failed login
 594   def failed_login(message, username = nil)
 595     flash[:error] = message
 596
 597     redirect_to :action => "login", :referer => session[:referer],
 598                 :username => username, :remember_me => session[:remember_me]
 599
 600     session.delete(:remember_me)
 601     session.delete(:referer)
 602   end
 603
 604   ##
 605   #
 606   def unconfirmed_login(user)
 607     session[:token] = user.tokens.create.token
 608
 609     redirect_to :action => "confirm", :display_name => user.display_name
 610
 611     session.delete(:remember_me)
 612     session.delete(:referer)
 613   end
 614
 615   ##
 616   # update a user's details
 617   def update_user(user, params)
 618     user.display_name = params[:user][:display_name]
 619     user.new_email = params[:user][:new_email]
 620
 621     unless params[:user][:pass_crypt].empty? && params[:user][:pass_crypt_confirmation].empty?
 622       user.pass_crypt = params[:user][:pass_crypt]
 623       user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
 624     end
 625
 626     if params[:user][:description] != user.description
 627       user.description = params[:user][:description]
 628       user.description_format = "markdown"
 629     end
 630
 631     user.languages = params[:user][:languages].split(",")
 632
 633     case params[:avatar_action]
 634     when "new"
 635       user.avatar.attach(params[:user][:avatar])
 636       user.image_use_gravatar = false
 637     when "delete"
 638       user.avatar.purge_later
 639       user.image_use_gravatar = false
 640     when "gravatar"
 641       user.avatar.purge_later
 642       user.image_use_gravatar = true
 643     end
 644
 645     user.home_lat = params[:user][:home_lat]
 646     user.home_lon = params[:user][:home_lon]
 647
 648     user.preferred_editor = if params[:user][:preferred_editor] == "default"
 649                               nil
 650                             else
 651                               params[:user][:preferred_editor]
 652                             end
 653
 654     if params[:user][:auth_provider].nil? || params[:user][:auth_provider].blank?
 655       user.auth_provider = nil
 656       user.auth_uid = nil
 657     end
 658
 659     if user.save
 660       session[:fingerprint] = user.fingerprint
 661
 662       set_locale(:reset => true)
 663
 664       if user.new_email.blank? || user.new_email == user.email
 665         flash[:notice] = t "users.account.flash update success"
 666       else
 667         user.email = user.new_email
 668
 669         if user.valid?
 670           flash[:notice] = t "users.account.flash update success confirm needed"
 671
 672           begin
 673             UserMailer.email_confirm(user, user.tokens.create).deliver_later
 674           rescue StandardError
 675             # Ignore errors sending email
 676           end
 677         else
 678           current_user.errors.add(:new_email, current_user.errors[:email])
 679           current_user.errors.add(:email, [])
 680         end
 681
 682         user.restore_email!
 683       end
 684     end
 685   end
 686
 687   ##
 688   # require that the user in the URL is the logged in user
 689   def require_self
 690     head :forbidden if params[:display_name] != current_user.display_name
 691   end
 692
 693   ##
 694   # ensure that there is a "user" instance variable
 695   def lookup_user_by_name
 696     @user = User.find_by(:display_name => params[:display_name])
 697   rescue ActiveRecord::RecordNotFound
 698     redirect_to :action => "view", :display_name => params[:display_name] unless @user
 699   end
 700
 701   ##
 702   #
 703   def disable_terms_redirect
 704     # this is necessary otherwise going to the user terms page, when
 705     # having not agreed already would cause an infinite redirect loop.
 706     # it's .now so that this doesn't propagate to other pages.
 707     flash.now[:skip_terms] = true
 708   end
 709
 710   ##
 711   # return permitted user parameters
 712   def user_params
 713     params.require(:user).permit(:email, :email_confirmation, :display_name,
 714                                  :auth_provider, :auth_uid,
 715                                  :pass_crypt, :pass_crypt_confirmation)
 716   end
 717
 718   ##
 719   # check signup acls
 720   def check_signup_allowed(email = nil)
 721     domain = if email.nil?
 722                nil
 723              else
 724                email.split("@").last
 725              end
 726
 727     mx_servers = if domain.nil?
 728                    nil
 729                  else
 730                    domain_mx_servers(domain)
 731                  end
 732
 733     if blocked = Acl.no_account_creation(request.remote_ip, :domain => domain, :mx => mx_servers)
 734       logger.info "Blocked signup from #{request.remote_ip} for #{email}"
 735
 736       render :action => "blocked"
 737     end
 738
 739     !blocked
 740   end
 741
 742   ##
 743   # get list of MX servers for a domains
 744   def domain_mx_servers(domain)
 745     Resolv::DNS.open do |dns|
 746       dns.getresources(domain, Resolv::DNS::Resource::IN::MX).collect(&:exchange).collect(&:to_s)
 747     end
 748   end
 749
 750   ##
 751   # check if this user has a gravatar and set the user pref is true
 752   def gravatar_enable(user)
 753     # code from example https://en.gravatar.com/site/implement/images/ruby/
 754     return false if user.avatar.attached?
 755
 756     hash = Digest::MD5.hexdigest(user.email.downcase)
 757     url = "https://www.gravatar.com/avatar/#{hash}?d=404" # without d=404 we will always get an image back
 758     response = OSM.http_client.get(URI.parse(url))
 759     oldsetting = user.image_use_gravatar
 760     user.image_use_gravatar = response.success?
 761     oldsetting != user.image_use_gravatar
 762   end
 763
 764   ##
 765   # display a message about th current status of the gravatar setting
 766   def gravatar_status_message(user)
 767     if user.image_use_gravatar
 768       t "users.account.gravatar.enabled"
 769     else
 770       t "users.account.gravatar.disabled"
 771     end
 772   end
 773 end