Remove unecessary calls to limit_user!, UniqueIps Middleware, and address MR review

 - cleanup formating in haml
 - clarify time window is in seconds
 - cleanup straneous chunks in db/schema
 - rename count_uniqe_ips to update_and_return_ips_count
 - other

app/controllers/application_controller.rb

@@ -40,6 +40,10 @@ class ApplicationController < ActionController::Base
     render_403
   end
 
+  rescue_from Gitlab::Auth::TooManyIps do |e|
+    head :forbidden, retry_after: UniqueIpsLimiter.config.unique_ips_limit_time_window
+  end
+
   def redirect_back_or_default(default: root_path, options: {})
     redirect_to request.referer.present? ? :back : default, options
   end

app/controllers/sessions_controller.rb

@@ -67,12 +67,10 @@ class SessionsController < Devise::SessionsController
   end
 
   def find_user
-    Gitlab::Auth::UniqueIpsLimiter.limit_user! do
-      if session[:otp_user_id]
-        User.find(session[:otp_user_id])
-      elsif user_params[:login]
-        User.by_login(user_params[:login])
-      end
+    if session[:otp_user_id]
+      User.find(session[:otp_user_id])
+    elsif user_params[:login]
+      User.by_login(user_params[:login])
     end
   end
 

app/views/admin/application_settings/_form.html.haml

@@ -366,7 +366,8 @@
           = f.label :unique_ips_limit_enabled do
             = f.check_box :unique_ips_limit_enabled
             Limit sign in from multiple ips
-          %span.help-block#recaptcha_help_block Helps prevent malicious users hide their activity
+          %span.help-block#unique_ip_help_block
+            Helps prevent malicious users hide their activity
 
     .form-group
       = f.label :unique_ips_limit_per_user, 'IPs per user', class: 'control-label col-sm-2'
@@ -380,7 +381,7 @@
       .col-sm-10
         = f.number_field :unique_ips_limit_time_window, class: 'form-control'
         .help-block
-          How long an IP will be counted towards the limit
+          How many seconds an IP will be counted towards the limit
 
   %fieldset
     %legend Abuse reports

config/application.rb

@@ -8,8 +8,6 @@ module Gitlab
   class Application < Rails::Application
     require_dependency Rails.root.join('lib/gitlab/redis')
     require_dependency Rails.root.join('lib/gitlab/request_context')
-    require_dependency Rails.root.join('lib/gitlab/auth')
-    require_dependency Rails.root.join('lib/gitlab/auth/unique_ips_limiter')
 
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration should go into files in config/initializers
@@ -114,8 +112,6 @@ module Gitlab
 
     config.middleware.insert_before Warden::Manager, Rack::Attack
 
-    config.middleware.insert_before Warden::Manager, Gitlab::Auth::UniqueIpsLimiter
-
     # Allow access to GitLab API from other domains
     config.middleware.insert_before Warden::Manager, Rack::Cors do
       allow do

config/initializers/doorkeeper.rb

@@ -12,10 +12,8 @@ Doorkeeper.configure do
   end
 
   resource_owner_from_credentials do |routes|
-    Gitlab::Auth::UniqueIpsLimiter.limit_user! do
-      user = Gitlab::Auth.find_with_user_password(params[:username], params[:password])
-      user unless user.try(:two_factor_enabled?)
-    end
+    user = Gitlab::Auth.find_with_user_password(params[:username], params[:password])
+    user unless user.try(:two_factor_enabled?)
   end
 
   # If you want to restrict access to the web interface for adding oauth authorized applications, you need to declare the block below.

db/migrate/20170210131347_add_unique_ips_limit_to_application_settings.rb

@@ -4,14 +4,14 @@ class AddUniqueIpsLimitToApplicationSettings < ActiveRecord::Migration
   disable_ddl_transaction!
 
   def up
-    add_column_with_default(:application_settings, :unique_ips_limit_per_user, :integer, default: 10)
-    add_column_with_default(:application_settings, :unique_ips_limit_time_window, :integer, default: 3600)
-    add_column_with_default(:application_settings, :unique_ips_limit_enabled, :boolean, default: false)
+    add_column_with_default :application_settings, :unique_ips_limit_per_user, :integer, default: 10
+    add_column_with_default :application_settings, :unique_ips_limit_time_window, :integer, default: 3600
+    add_column_with_default :application_settings, :unique_ips_limit_enabled, :boolean, default: false
   end
 
   def down
-    remove_column(:application_settings, :unique_ips_limit_per_user)
-    remove_column(:application_settings, :unique_ips_limit_time_window)
-    remove_column(:application_settings, :unique_ips_limit_enabled)
+    remove_column :application_settings, :unique_ips_limit_per_user
+    remove_column :application_settings, :unique_ips_limit_time_window
+    remove_column :application_settings, :unique_ips_limit_enabled
   end
 end

db/schema.rb

@@ -586,9 +586,9 @@ ActiveRecord::Schema.define(version: 20170305203726) do
   end
 
   add_index "labels", ["group_id", "project_id", "title"], name: "index_labels_on_group_id_and_project_id_and_title", unique: true, using: :btree
+  add_index "labels", ["type", "project_id"], name: "index_labels_on_type_and_project_id", using: :btree
   add_index "labels", ["project_id"], name: "index_labels_on_project_id", using: :btree
   add_index "labels", ["title"], name: "index_labels_on_title", using: :btree
-  add_index "labels", ["type", "project_id"], name: "index_labels_on_type_and_project_id", using: :btree
 
   create_table "lfs_objects", force: :cascade do |t|
     t.string "oid", null: false

lib/gitlab/auth.rb

@@ -22,9 +22,8 @@ module Gitlab
           user_with_password_for_git(login, password) ||
           Gitlab::Auth::Result.new
 
-        Gitlab::Auth::UniqueIpsLimiter.limit_user!(result.actor)
-
         rate_limit!(ip, success: result.success?, login: login)
+        Gitlab::Auth::UniqueIpsLimiter.limit_user!(result.actor)
 
         result
       end

lib/gitlab/auth/too_many_ips.rb

+module Gitlab
+  module Auth
+    class TooManyIps < StandardError
+      attr_reader :user_id, :ip, :unique_ips_count
+
+      def initialize(user_id, ip, unique_ips_count)
+        @user_id = user_id
+        @ip = ip
+        @unique_ips_count = unique_ips_count
+      end
+
+      def message
+        "User #{user_id} from IP: #{ip} tried logging from too many ips: #{unique_ips_count}"
+      end
+    end
+  end
+end

lib/gitlab/auth/unique_ips_limiter.rb

 module Gitlab
   module Auth
-    class TooManyIps < StandardError
-      attr_reader :user_id, :ip, :unique_ips_count
-
-      def initialize(user_id, ip, unique_ips_count)
-        @user_id = user_id
-        @ip = ip
-        @unique_ips_count = unique_ips_count
-      end
-
-      def message
-        "User #{user_id} from IP: #{ip} tried logging from too many ips: #{unique_ips_count}"
-      end
-    end
-
     class UniqueIpsLimiter
       USER_UNIQUE_IPS_PREFIX = 'user_unique_ips'
 
@@ -21,7 +7,7 @@ module Gitlab
         def limit_user_id!(user_id)
           if config.unique_ips_limit_enabled
             ip = RequestContext.client_ip
-            unique_ips = count_unique_ips(user_id, ip)
+            unique_ips = update_and_return_ips_count(user_id, ip)
             raise TooManyIps.new(user_id, ip, unique_ips) if unique_ips > config.unique_ips_limit_per_user
           end
         end
@@ -36,8 +22,8 @@ module Gitlab
           Gitlab::CurrentSettings.current_application_settings
         end
 
-        def count_unique_ips(user_id, ip)
-          time = Time.now.to_i
+        def update_and_return_ips_count(user_id, ip)
+          time = Time.now.utc.to_i
           key = "#{USER_UNIQUE_IPS_PREFIX}:#{user_id}"
 
           Gitlab::Redis.with do |redis|
@@ -51,20 +37,6 @@ module Gitlab
           end
         end
       end
-
-      def initialize(app)
-        @app = app
-      end
-
-      def call(env)
-        begin
-          @app.call(env)
-        rescue TooManyIps => ex
-
-          Rails.logger.info ex.message
-          [403, { 'Content-Type' => 'text/plain', 'Retry-After' => UniqueIpsLimiter.config.unique_ips_limit_time_window }, ["Too many logins from different IPs\n"]]
-        end
-      end
     end
   end
 end

lib/gitlab/request_context.rb

@@ -14,7 +14,6 @@ module Gitlab
     end
 
     def call(env)
-      raise RequestStoreNotActive.new unless RequestStore.active?
       req = Rack::Request.new(env)
 
       RequestStore[:client_ip] = req.ip

spec/controllers/sessions_controller_spec.rb

@@ -33,6 +33,7 @@ describe SessionsController do
         include_examples 'user login operation with unique ip limit' do
           def operation
             post(:create, user: { login: user.username, password: user.password })
+
             expect(subject.current_user).to eq user
           end
         end

spec/lib/gitlab/auth/unique_ips_limiter_spec.rb

@@ -7,36 +7,35 @@ describe Gitlab::Auth::UniqueIpsLimiter, :redis, lib: true do
   describe '#count_unique_ips' do
     context 'non unique IPs' do
       it 'properly counts them' do
-        expect(Gitlab::Auth::UniqueIpsLimiter.count_unique_ips(user.id, 'ip1')).to eq(1)
-        expect(Gitlab::Auth::UniqueIpsLimiter.count_unique_ips(user.id, 'ip1')).to eq(1)
+        expect(described_class.update_and_return_ips_count(user.id, 'ip1')).to eq(1)
+        expect(described_class.update_and_return_ips_count(user.id, 'ip1')).to eq(1)
       end
     end
 
     context 'unique IPs' do
       it 'properly counts them' do
-        expect(Gitlab::Auth::UniqueIpsLimiter.count_unique_ips(user.id, 'ip2')).to eq(1)
-        expect(Gitlab::Auth::UniqueIpsLimiter.count_unique_ips(user.id, 'ip3')).to eq(2)
+        expect(described_class.update_and_return_ips_count(user.id, 'ip2')).to eq(1)
+        expect(described_class.update_and_return_ips_count(user.id, 'ip3')).to eq(2)
       end
     end
 
     it 'resets count after specified time window' do
-      cur_time = Time.now
-      allow(Time).to receive(:now).and_return(cur_time)
-
-      expect(Gitlab::Auth::UniqueIpsLimiter.count_unique_ips(user.id, 'ip2')).to eq(1)
-      expect(Gitlab::Auth::UniqueIpsLimiter.count_unique_ips(user.id, 'ip3')).to eq(2)
-
-      allow(Time).to receive(:now).and_return(cur_time + Gitlab::Auth::UniqueIpsLimiter.config.unique_ips_limit_time_window)
-
-      expect(Gitlab::Auth::UniqueIpsLimiter.count_unique_ips(user.id, 'ip4')).to eq(1)
-      expect(Gitlab::Auth::UniqueIpsLimiter.count_unique_ips(user.id, 'ip5')).to eq(2)
+      Timecop.freeze do
+        expect(described_class.update_and_return_ips_count(user.id, 'ip2')).to eq(1)
+        expect(described_class.update_and_return_ips_count(user.id, 'ip3')).to eq(2)
+
+        Timecop.travel(Time.now.utc + described_class.config.unique_ips_limit_time_window) do
+          expect(described_class.update_and_return_ips_count(user.id, 'ip4')).to eq(1)
+          expect(described_class.update_and_return_ips_count(user.id, 'ip5')).to eq(2)
+        end
+      end
     end
   end
 
   describe '#limit_user!' do
     include_examples 'user login operation with unique ip limit' do
       def operation
-        Gitlab::Auth::UniqueIpsLimiter.limit_user! { user }
+        described_class.limit_user! { user }
       end
     end
 
@@ -45,13 +44,13 @@ describe Gitlab::Auth::UniqueIpsLimiter, :redis, lib: true do
 
       it 'blocks user trying to login from third ip' do
         change_ip('ip1')
-        expect(Gitlab::Auth::UniqueIpsLimiter.limit_user! { user }).to eq(user)
+        expect(described_class.limit_user! { user }).to eq(user)
 
         change_ip('ip2')
-        expect(Gitlab::Auth::UniqueIpsLimiter.limit_user! { user }).to eq(user)
+        expect(described_class.limit_user! { user }).to eq(user)
 
         change_ip('ip3')
-        expect { Gitlab::Auth::UniqueIpsLimiter.limit_user! { user } }.to raise_error(Gitlab::Auth::TooManyIps)
+        expect { described_class.limit_user! { user } }.to raise_error(Gitlab::Auth::TooManyIps)
       end
     end
   end

spec/lib/gitlab/auth_spec.rb

@@ -206,7 +206,7 @@ describe Gitlab::Auth, lib: true do
 
     include_examples 'user login operation with unique ip limit' do
       def operation
-        expect(gl_auth.find_with_user_password(username, password)).to eql user
+        expect(gl_auth.find_with_user_password(username, password)).to eq(user)
       end
     end
 

spec/lib/gitlab/request_context_spec.rb

@@ -26,15 +26,5 @@ describe Gitlab::RequestContext, lib: true do
         it { is_expected.to be_nil }
       end
     end
-
-    context 'RequestStore is not active' do
-      it { is_expected.to be_nil }
-
-      context 'when RequestContext mw is run' do
-        subject { -> { Gitlab::RequestContext.new(app).call(env) } }
-
-        it { is_expected.to raise_error(Gitlab::RequestStoreNotActive) }
-      end
-    end
   end
 end