Rework the default denied access handler to give different responses to tokens, logge...

[rails.git] / app / controllers / application_controller.rb

diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index acc478c152c4b68aa04bab1d8d84862b22183d45..690bdf5ca5140dad6448e86af7e6d02732ce7c35 100644 (file)
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,53 +1,57 @@
 class ApplicationController < ActionController::Base
   include SessionPersistence
 
 class ApplicationController < ActionController::Base
   include SessionPersistence
 

-  protect_from_forgery
+  protect_from_forgery :with => :exception
+
+  rescue_from CanCan::AccessDenied, :with => :deny_access

 
   before_action :fetch_body
 
   before_action :fetch_body

+  around_action :better_errors_allow_inline, :if => proc { Rails.env.development? }
+
+  attr_accessor :current_user
+  helper_method :current_user

 
   def authorize_web
     if session[:user]
 
   def authorize_web
     if session[:user]

-      @user = User.where(:id => session[:user]).where("status IN ('active', 'confirmed', 'suspended')").first
+      self.current_user = User.where(:id => session[:user]).where("status IN ('active', 'confirmed', 'suspended')").first

 
 

-      if @user.status == "suspended"
+      if current_user.status == "suspended"

         session.delete(:user)
         session_expires_automatically
 
         session.delete(:user)
         session_expires_automatically
 

-        redirect_to :controller => "user", :action => "suspended"
+        redirect_to :controller => "users", :action => "suspended"

 
       # don't allow access to any auth-requiring part of the site unless
       # the new CTs have been seen (and accept/decline chosen).
 
       # don't allow access to any auth-requiring part of the site unless
       # the new CTs have been seen (and accept/decline chosen).

-      elsif !@user.terms_seen && flash[:skip_terms].nil?
+      elsif !current_user.terms_seen && flash[:skip_terms].nil?

         flash[:notice] = t "user.terms.you need to accept or decline"
         if params[:referer]
         flash[:notice] = t "user.terms.you need to accept or decline"
         if params[:referer]

-          redirect_to :controller => "user", :action => "terms", :referer => params[:referer]
+          redirect_to :controller => "users", :action => "terms", :referer => params[:referer]

         else
         else

-          redirect_to :controller => "user", :action => "terms", :referer => request.fullpath
+          redirect_to :controller => "users", :action => "terms", :referer => request.fullpath

         end
       end
     elsif session[:token]
         end
       end
     elsif session[:token]

-      if @user = User.authenticate(:token => session[:token])
-        session[:user] = @user.id
-      end
+      session[:user] = current_user.id if self.current_user = User.authenticate(:token => session[:token])

     end
   rescue StandardError => ex
     logger.info("Exception authorizing user: #{ex}")
     reset_session
     end
   rescue StandardError => ex
     logger.info("Exception authorizing user: #{ex}")
     reset_session

-    @user = nil
+    self.current_user = nil

   end
 
   def require_user
   end
 
   def require_user

-    unless @user
+    unless current_user

       if request.get?
       if request.get?

-        redirect_to :controller => "user", :action => "login", :referer => request.fullpath
+        redirect_to :controller => "users", :action => "login", :referer => request.fullpath

       else
       else

-        render :text => "", :status => :forbidden
+        head :forbidden

       end
     end
   end
 
   def require_oauth
       end
     end
   end
 
   def require_oauth

-    @oauth = @user.access_token(OAUTH_KEY) if @user && defined? OAUTH_KEY
+    @oauth = current_user.access_token(OAUTH_KEY) if current_user && defined? OAUTH_KEY

   end
 
   ##
   end
 
   ##


@@ -74,7 +78,7 @@ class ApplicationController < ActionController::Base
     if request.cookies["_osm_session"].to_s == ""
       if params[:cookie_test].nil?
         session[:cookie_test] = true
     if request.cookies["_osm_session"].to_s == ""
       if params[:cookie_test].nil?
         session[:cookie_test] = true

-        redirect_to Hash[params].merge(:cookie_test => "true")
+        redirect_to params.to_unsafe_h.merge(:cookie_test => "true")

         false
       else
         flash.now[:warning] = t "application.require_cookies.cookies_needed"
         false
       else
         flash.now[:warning] = t "application.require_cookies.cookies_needed"


@@ -100,7 +104,7 @@ class ApplicationController < ActionController::Base
   def require_allow_write_api
     require_capability(:allow_write_api)
 
   def require_allow_write_api
     require_capability(:allow_write_api)
 

-    if REQUIRE_TERMS_AGREED && @user.terms_agreed.nil?
+    if REQUIRE_TERMS_AGREED && current_user.terms_agreed.nil?

       report_error "You must accept the contributor terms before you can edit.", :forbidden
       return false
     end
       report_error "You must accept the contributor terms before you can edit.", :forbidden
       return false
     end


@@ -122,18 +126,18 @@ class ApplicationController < ActionController::Base
   # require that the user is a moderator, or fill out a helpful error message
   # and return them to the index for the controller this is wrapped from.
   def require_moderator
   # require that the user is a moderator, or fill out a helpful error message
   # and return them to the index for the controller this is wrapped from.
   def require_moderator

-    unless @user.moderator?
+    unless current_user.moderator?

       if request.get?
         flash[:error] = t("application.require_moderator.not_a_moderator")
         redirect_to :action => "index"
       else
       if request.get?
         flash[:error] = t("application.require_moderator.not_a_moderator")
         redirect_to :action => "index"
       else

-        render :text => "", :status => :forbidden
+        head :forbidden

       end
     end
   end
 
   ##
       end
     end
   end
 
   ##

-  # sets up the @user object for use by other methods. this is mostly called
+  # sets up the current_user for use by other methods. this is mostly called

   # from the authorize method, but can be called elsewhere if authorisation
   # is optional.
   def setup_user_auth
   # from the authorize method, but can be called elsewhere if authorisation
   # is optional.
   def setup_user_auth


@@ -141,19 +145,19 @@ class ApplicationController < ActionController::Base
     unless Authenticator.new(self, [:token]).allow?
       username, passwd = get_auth_data # parse from headers
       # authenticate per-scheme
     unless Authenticator.new(self, [:token]).allow?
       username, passwd = get_auth_data # parse from headers
       # authenticate per-scheme

-      @user = if username.nil?
-                nil # no authentication provided - perhaps first connect (client should retry after 401)
-              elsif username == "token"
-                User.authenticate(:token => passwd) # preferred - random token for user from db, passed in basic auth
-              else
-                User.authenticate(:username => username, :password => passwd) # basic auth
-              end
+      self.current_user = if username.nil?
+                            nil # no authentication provided - perhaps first connect (client should retry after 401)
+                          elsif username == "token"
+                            User.authenticate(:token => passwd) # preferred - random token for user from db, passed in basic auth
+                          else
+                            User.authenticate(:username => username, :password => passwd) # basic auth
+                          end

     end
 
     # have we identified the user?
     end
 
     # have we identified the user?

-    if @user
+    if current_user

       # check if the user has been banned
       # check if the user has been banned

-      user_block = @user.blocks.active.take
+      user_block = current_user.blocks.active.take

       unless user_block.nil?
         set_locale
         if user_block.zero_hour?
       unless user_block.nil?
         set_locale
         if user_block.zero_hour?


@@ -166,7 +170,7 @@ class ApplicationController < ActionController::Base
       # if the user hasn't seen the contributor terms then don't
       # allow editing - they have to go to the web site and see
       # (but can decline) the CTs to continue.
       # if the user hasn't seen the contributor terms then don't
       # allow editing - they have to go to the web site and see
       # (but can decline) the CTs to continue.

-      if REQUIRE_TERMS_SEEN && !@user.terms_seen && flash[:skip_terms].nil?
+      if REQUIRE_TERMS_SEEN && !current_user.terms_seen && flash[:skip_terms].nil?

         set_locale
         report_error t("application.setup_user_auth.need_to_see_terms"), :forbidden
       end
         set_locale
         report_error t("application.setup_user_auth.need_to_see_terms"), :forbidden
       end


@@ -174,14 +178,14 @@ class ApplicationController < ActionController::Base
   end
 
   def authorize(realm = "Web Password", errormessage = "Couldn't authenticate you")
   end
 
   def authorize(realm = "Web Password", errormessage = "Couldn't authenticate you")

-    # make the @user object from any auth sources we have
+    # make the current_user object from any auth sources we have

     setup_user_auth
 
     # handle authenticate pass/fail
     setup_user_auth
 
     # handle authenticate pass/fail

-    unless @user
+    unless current_user

       # no auth, the user does not exist or the password was wrong
       response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\""
       # no auth, the user does not exist or the password was wrong
       response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\""

-      render :text => errormessage, :status => :unauthorized
+      render :plain => errormessage, :status => :unauthorized

       return false
     end
   end
       return false
     end
   end


@@ -196,8 +200,8 @@ class ApplicationController < ActionController::Base
   # good idea to do that in this branch.
   def authorize_moderator(errormessage = "Access restricted to moderators")
     # check user is a moderator
   # good idea to do that in this branch.
   def authorize_moderator(errormessage = "Access restricted to moderators")
     # check user is a moderator

-    unless @user.moderator?
-      render :text => errormessage, :status => :forbidden
+    unless current_user.moderator?
+      render :plain => errormessage, :status => :forbidden

       false
     end
   end
       false
     end
   end


@@ -266,7 +270,7 @@ class ApplicationController < ActionController::Base
   end
 
   def require_public_data
   end
 
   def require_public_data

-    unless @user.data_public?
+    unless current_user.data_public?

       report_error "You must make your edits public to upload new data", :forbidden
       false
     end
       report_error "You must make your edits public to upload new data", :forbidden
       false
     end


@@ -281,38 +285,38 @@ class ApplicationController < ActionController::Base
     # TODO: some sort of escaping of problem characters in the message
     response.headers["Error"] = message
 
     # TODO: some sort of escaping of problem characters in the message
     response.headers["Error"] = message
 

-    if request.headers["X-Error-Format"] &&
-       request.headers["X-Error-Format"].casecmp("xml").zero?
+    if request.headers["X-Error-Format"]&.casecmp("xml")&.zero?

       result = OSM::API.new.get_xml_doc
       result.root.name = "osmError"
       result.root << (XML::Node.new("status") << "#{Rack::Utils.status_code(status)} #{Rack::Utils::HTTP_STATUS_CODES[status]}")
       result.root << (XML::Node.new("message") << message)
 
       result = OSM::API.new.get_xml_doc
       result.root.name = "osmError"
       result.root << (XML::Node.new("status") << "#{Rack::Utils.status_code(status)} #{Rack::Utils::HTTP_STATUS_CODES[status]}")
       result.root << (XML::Node.new("message") << message)
 

-      render :text => result.to_s, :content_type => "text/xml"
+      render :xml => result.to_s

     else
     else

-      render :text => message, :status => status, :content_type => "text/plain"
+      render :plain => message, :status => status

     end
   end
 
     end
   end
 

-  def preferred_languages
-    @languages ||= if params[:locale]
-                     Locale.list(params[:locale])
-                   elsif @user
-                     @user.preferred_languages
-                   else
-                     Locale.list(http_accept_language.user_preferred_languages)
-                   end
+  def preferred_languages(reset = false)
+    @preferred_languages = nil if reset
+    @preferred_languages ||= if params[:locale]
+                               Locale.list(params[:locale])
+                             elsif current_user
+                               current_user.preferred_languages
+                             else
+                               Locale.list(http_accept_language.user_preferred_languages)
+                             end

   end
 
   helper_method :preferred_languages
 
   end
 
   helper_method :preferred_languages
 

-  def set_locale
-    if @user && @user.languages.empty? && !http_accept_language.user_preferred_languages.empty?
-      @user.languages = http_accept_language.user_preferred_languages
-      @user.save
+  def set_locale(reset = false)
+    if current_user&.languages&.empty? && !http_accept_language.user_preferred_languages.empty?
+      current_user.languages = http_accept_language.user_preferred_languages
+      current_user.save

     end
 
     end
 

-    I18n.locale = Locale.available.preferred(preferred_languages)
+    I18n.locale = Locale.available.preferred(preferred_languages(reset))

 
     response.headers["Vary"] = "Accept-Language"
     response.headers["Content-Language"] = I18n.locale.to_s
 
     response.headers["Vary"] = "Accept-Language"
     response.headers["Content-Language"] = I18n.locale.to_s


@@ -321,7 +325,7 @@ class ApplicationController < ActionController::Base
   def api_call_handle_error
     yield
   rescue ActiveRecord::RecordNotFound => ex
   def api_call_handle_error
     yield
   rescue ActiveRecord::RecordNotFound => ex

-    render :text => "", :status => :not_found
+    head :not_found

   rescue LibXML::XML::Error, ArgumentError => ex
     report_error ex.message, :bad_request
   rescue ActiveRecord::RecordInvalid => ex
   rescue LibXML::XML::Error, ArgumentError => ex
     report_error ex.message, :bad_request
   rescue ActiveRecord::RecordInvalid => ex


@@ -343,7 +347,7 @@ class ApplicationController < ActionController::Base
   # or raises a suitable error. +method+ should be a symbol, e.g: :put or :get.
   def assert_method(method)
     ok = request.send((method.to_s.downcase + "?").to_sym)
   # or raises a suitable error. +method+ should be a symbol, e.g: :put or :get.
   def assert_method(method)
     ok = request.send((method.to_s.downcase + "?").to_sym)

-    raise OSM::APIBadMethodError.new(method) unless ok
+    raise OSM::APIBadMethodError, method unless ok

   end
 
   ##
   end
 
   ##


@@ -363,7 +367,7 @@ class ApplicationController < ActionController::Base
       yield
     end
   rescue ActionView::Template::Error => ex
       yield
     end
   rescue ActionView::Template::Error => ex

-    ex = ex.original_exception
+    ex = ex.cause

 
     if ex.is_a?(Timeout::Error) ||
        (ex.is_a?(ActiveRecord::StatementInvalid) && ex.message =~ /execution expired/)
 
     if ex.is_a?(Timeout::Error) ||
        (ex.is_a?(ActiveRecord::StatementInvalid) && ex.message =~ /execution expired/)


@@ -376,22 +380,20 @@ class ApplicationController < ActionController::Base
   end
 
   ##
   end
 
   ##

-  # ensure that there is a "this_user" instance variable
-  def lookup_this_user
-    unless @this_user = User.active.find_by(:display_name => params[:display_name])
-      render_unknown_user params[:display_name]
-    end
+  # ensure that there is a "user" instance variable
+  def lookup_user
+    render_unknown_user params[:display_name] unless @user = User.active.find_by(:display_name => params[:display_name])

   end
 
   ##
   # render a "no such user" page
   def render_unknown_user(name)
   end
 
   ##
   # render a "no such user" page
   def render_unknown_user(name)

-    @title = t "user.no_such_user.title"
+    @title = t "users.no_such_user.title"

     @not_found_user = name
 
     respond_to do |format|
     @not_found_user = name
 
     respond_to do |format|

-      format.html { render :template => "user/no_such_user", :status => :not_found }
-      format.all { render :text => "", :status => :not_found }
+      format.html { render :template => "users/no_such_user", :status => :not_found }
+      format.all { head :not_found }

     end
   end
 
     end
   end
 


@@ -410,19 +412,32 @@ class ApplicationController < ActionController::Base
 
   def map_layout
     append_content_security_policy_directives(
 
   def map_layout
     append_content_security_policy_directives(

-      :connect_src => %w(nominatim.openstreetmap.org overpass-api.de router.project-osrm.org valhalla.mapzen.com),
-      :script_src => %w(graphhopper.com open.mapquestapi.com),
-      :img_src => %w(developer.mapquest.com)
+      :child_src => %w[http://127.0.0.1:8111 https://127.0.0.1:8112],
+      :frame_src => %w[http://127.0.0.1:8111 https://127.0.0.1:8112],
+      :connect_src => %w[nominatim.openstreetmap.org overpass-api.de router.project-osrm.org graphhopper.com],
+      :form_action => %w[render.openstreetmap.org],
+      :script_src => %w[open.mapquestapi.com],
+      :img_src => %w[developer.mapquest.com]

     )
 
     )
 

+    if STATUS == :database_offline || STATUS == :api_offline
+      flash.now[:warning] = t("layouts.osm_offline")
+    elsif STATUS == :database_readonly || STATUS == :api_readonly
+      flash.now[:warning] = t("layouts.osm_read_only")
+    end
+

     request.xhr? ? "xhr" : "map"
   end
 
     request.xhr? ? "xhr" : "map"
   end
 

+  def allow_thirdparty_images
+    append_content_security_policy_directives(:img_src => %w[*])
+  end
+

   def preferred_editor
     editor = if params[:editor]
                params[:editor]
   def preferred_editor
     editor = if params[:editor]
                params[:editor]

-             elsif @user && @user.preferred_editor
-               @user.preferred_editor
+             elsif current_user&.preferred_editor
+               current_user.preferred_editor

              else
                DEFAULT_EDITOR
              end
              else
                DEFAULT_EDITOR
              end


@@ -442,6 +457,39 @@ class ApplicationController < ActionController::Base
     end
   end
 
     end
   end
 

+  def better_errors_allow_inline
+    yield
+  rescue StandardError
+    append_content_security_policy_directives(
+      :script_src => %w['unsafe-inline'],
+      :style_src => %w['unsafe-inline']
+    )
+
+    raise
+  end
+
+  def current_ability
+    Ability.new(current_user).merge(granted_capability)
+  end
+
+  def granted_capability
+    Capability.new(current_user, current_token)
+  end
+
+  def deny_access(_exception)
+    if current_token
+      set_locale
+      report_error t("oauth.permissions.missing"), :forbidden
+    elsif current_user
+      set_locale
+      report_error t("application.permission_denied"), :forbidden
+    elsif request.get?
+      redirect_to :controller => "users", :action => "login", :referer => request.fullpath
+    else
+      head :forbidden
+    end
+  end
+

   private
 
   # extract authorisation credentials from headers, returns user = nil if none
   private
 
   # extract authorisation credentials from headers, returns user = nil if none


@@ -454,22 +502,10 @@ class ApplicationController < ActionController::Base
       authdata = request.env["HTTP_AUTHORIZATION"].to_s.split
     end
     # only basic authentication supported
       authdata = request.env["HTTP_AUTHORIZATION"].to_s.split
     end
     # only basic authentication supported

-    if authdata && authdata[0] == "Basic"
-      user, pass = Base64.decode64(authdata[1]).split(":", 2)
-    end
+    user, pass = Base64.decode64(authdata[1]).split(":", 2) if authdata && authdata[0] == "Basic"

     [user, pass]
   end
 
     [user, pass]
   end
 

-  # used by oauth plugin to get the current user
-  def current_user
-    @user
-  end
-
-  # used by oauth plugin to set the current user
-  def current_user=(user)
-    @user = user
-  end
-

   # override to stop oauth plugin sending errors
   def invalid_oauth_response; end
 end
   # override to stop oauth plugin sending errors
   def invalid_oauth_response; end
 end