Implement web hooks logging

* implemented logging of project and system web hooks
* implemented UI for user area (project hooks)
* implemented UI for admin area (system hooks)
* implemented retry of logged webhook
* NOT imeplemented log remover

48 files changed, 880 insertions, 289 deletions

diff --git a/app/controllers/admin/hook_logs_controller.rb b/app/controllers/admin/hook_logs_controller.rb
new file mode 100644
index 00000000000..aa069b89563
--- /dev/null
+++ b/app/controllers/admin/hook_logs_controller.rb
@@ -0,0 +1,29 @@
+class Admin::HookLogsController < Admin::ApplicationController
+  include HooksExecution
+
+  before_action :hook, only: [:show, :retry]
+  before_action :hook_log, only: [:show, :retry]
+
+  respond_to :html
+
+  def show
+  end
+
+  def retry
+    status, message = hook.execute(hook_log.request_data, hook_log.trigger)
+
+    set_hook_execution_notice(status, message)
+
+    redirect_to edit_admin_hook_path(@hook)
+  end
+
+  private
+
+  def hook
+    @hook ||= SystemHook.find(params[:hook_id])
+  end
+
+  def hook_log
+    @hook_log ||= hook.web_hook_logs.find(params[:id])
+  end
+end
diff --git a/app/controllers/admin/hooks_controller.rb b/app/controllers/admin/hooks_controller.rb
index ccfe553c89e..b9251e140f8 100644
--- a/app/controllers/admin/hooks_controller.rb
+++ b/app/controllers/admin/hooks_controller.rb
@@ -1,5 +1,7 @@
 class Admin::HooksController < Admin::ApplicationController
-  before_action :hook, only: :edit
+  include HooksExecution
+
+  before_action :hook_logs, only: :edit
 
   def index
     @hooks = SystemHook.all
@@ -36,15 +38,9 @@ class Admin::HooksController < Admin::ApplicationController
   end
 
   def test
-    data = {
-      event_name: "project_create",
-      name: "Ruby",
-      path: "ruby",
-      project_id: 1,
-      owner_name: "Someone",
-      owner_email: "example@gitlabhq.com"
-    }
-    hook.execute(data, 'system_hooks')
+    status, message = hook.execute(sample_hook_data, 'system_hooks')
+
+    set_hook_execution_notice(status, message)
 
     redirect_back_or_default
   end
@@ -55,6 +51,11 @@ class Admin::HooksController < Admin::ApplicationController
     @hook ||= SystemHook.find(params[:id])
   end
 
+  def hook_logs
+    @hook_logs ||=
+      Kaminari.paginate_array(hook.web_hook_logs.order(created_at: :desc)).page(params[:page])
+  end
+
   def hook_params
     params.require(:hook).permit(
       :enable_ssl_verification,
@@ -65,4 +66,15 @@ class Admin::HooksController < Admin::ApplicationController
       :url
     )
   end
+
+  def sample_hook_data
+    {
+      event_name: "project_create",
+      name: "Ruby",
+      path: "ruby",
+      project_id: 1,
+      owner_name: "Someone",
+      owner_email: "example@gitlabhq.com"
+    }
+  end
 end
diff --git a/app/controllers/concerns/hooks_execution.rb b/app/controllers/concerns/hooks_execution.rb
new file mode 100644
index 00000000000..846cd60518f
--- /dev/null
+++ b/app/controllers/concerns/hooks_execution.rb
@@ -0,0 +1,15 @@
+module HooksExecution
+  extend ActiveSupport::Concern
+
+  private
+
+  def set_hook_execution_notice(status, message)
+    if status && status >= 200 && status < 400
+      flash[:notice] = "Hook executed successfully: HTTP #{status}"
+    elsif status
+      flash[:alert] = "Hook executed successfully but returned HTTP #{status} #{message}"
+    else
+      flash[:alert] = "Hook execution failed: #{message}"
+    end
+  end
+end
diff --git a/app/controllers/projects/hook_logs_controller.rb b/app/controllers/projects/hook_logs_controller.rb
new file mode 100644
index 00000000000..354f0d6db3a
--- /dev/null
+++ b/app/controllers/projects/hook_logs_controller.rb
@@ -0,0 +1,33 @@
+class Projects::HookLogsController < Projects::ApplicationController
+  include HooksExecution
+
+  before_action :authorize_admin_project!
+
+  before_action :hook, only: [:show, :retry]
+  before_action :hook_log, only: [:show, :retry]
+
+  respond_to :html
+
+  layout 'project_settings'
+
+  def show
+  end
+
+  def retry
+    status, message = hook.execute(hook_log.request_data, hook_log.trigger)
+
+    set_hook_execution_notice(status, message)
+
+    redirect_to edit_namespace_project_hook_path(@project.namespace, @project, @hook)
+  end
+
+  private
+
+  def hook
+    @hook ||= @project.hooks.find(params[:hook_id])
+  end
+
+  def hook_log
+    @hook_log ||= hook.web_hook_logs.find(params[:id])
+  end
+end
diff --git a/app/controllers/projects/hooks_controller.rb b/app/controllers/projects/hooks_controller.rb
index 86d13a0d222..38bd82841dc 100644
--- a/app/controllers/projects/hooks_controller.rb
+++ b/app/controllers/projects/hooks_controller.rb
@@ -1,7 +1,9 @@
 class Projects::HooksController < Projects::ApplicationController
+  include HooksExecution
+
   # Authorize
   before_action :authorize_admin_project!
-  before_action :hook, only: :edit
+  before_action :hook_logs, only: :edit
 
   respond_to :html
 
@@ -34,13 +36,7 @@ class Projects::HooksController < Projects::ApplicationController
     if !@project.empty_repo?
       status, message = TestHookService.new.execute(hook, current_user)
 
-      if status && status >= 200 && status < 400
-        flash[:notice] = "Hook executed successfully: HTTP #{status}"
-      elsif status
-        flash[:alert] = "Hook executed successfully but returned HTTP #{status} #{message}"
-      else
-        flash[:alert] = "Hook execution failed: #{message}"
-      end
+      set_hook_execution_notice(status, message)
     else
       flash[:alert] = 'Hook execution failed. Ensure the project has commits.'
     end
@@ -60,6 +56,11 @@ class Projects::HooksController < Projects::ApplicationController
     @hook ||= @project.hooks.find(params[:id])
   end
 
+  def hook_logs
+    @hook_logs ||=
+      Kaminari.paginate_array(hook.web_hook_logs.order(created_at: :desc)).page(params[:page])
+  end
+
   def hook_params
     params.require(:hook).permit(
       :job_events,
diff --git a/app/models/hooks/service_hook.rb b/app/models/hooks/service_hook.rb
index eef24052a06..40e43c27f91 100644
--- a/app/models/hooks/service_hook.rb
+++ b/app/models/hooks/service_hook.rb
@@ -2,6 +2,6 @@ class ServiceHook < WebHook
   belongs_to :service
 
   def execute(data)
-    super(data, 'service_hook')
+    WebHookService.new(self, data, 'service_hook').execute
   end
 end
diff --git a/app/models/hooks/system_hook.rb b/app/models/hooks/system_hook.rb
index c645805c6da..1584235ab00 100644
--- a/app/models/hooks/system_hook.rb
+++ b/app/models/hooks/system_hook.rb
@@ -3,8 +3,4 @@ class SystemHook < WebHook
 
   default_value_for :push_events, false
   default_value_for :repository_update_events, true
-
-  def async_execute(data, hook_name)
-    Sidekiq::Client.enqueue(SystemHookWorker, id, data, hook_name)
-  end
 end
diff --git a/app/models/hooks/web_hook.rb b/app/models/hooks/web_hook.rb
index a165fdc312f..7503f3739c3 100644
--- a/app/models/hooks/web_hook.rb
+++ b/app/models/hooks/web_hook.rb
@@ -1,6 +1,5 @@
 class WebHook < ActiveRecord::Base
   include Sortable
-  include HTTParty
 
   default_value_for :push_events, true
   default_value_for :issues_events, false
@@ -13,52 +12,18 @@ class WebHook < ActiveRecord::Base
   default_value_for :repository_update_events, false
   default_value_for :enable_ssl_verification, true
 
+  has_many :web_hook_logs, dependent: :destroy
+
   scope :push_hooks, -> { where(push_events: true) }
   scope :tag_push_hooks, -> { where(tag_push_events: true) }
 
-  # HTTParty timeout
-  default_timeout Gitlab.config.gitlab.webhook_timeout
-
   validates :url, presence: true, url: true
 
   def execute(data, hook_name)
-    parsed_url = URI.parse(url)
-    if parsed_url.userinfo.blank?
-      response = WebHook.post(url,
-                              body: data.to_json,
-                              headers: build_headers(hook_name),
-                              verify: enable_ssl_verification)
-    else
-      post_url = url.gsub("#{parsed_url.userinfo}@", '')
-      auth = {
-        username: CGI.unescape(parsed_url.user),
-        password: CGI.unescape(parsed_url.password)
-      }
-      response = WebHook.post(post_url,
-                              body: data.to_json,
-                              headers: build_headers(hook_name),
-                              verify: enable_ssl_verification,
-                              basic_auth: auth)
-    end
-
-    [response.code, response.to_s]
-  rescue SocketError, OpenSSL::SSL::SSLError, Errno::ECONNRESET, Errno::ECONNREFUSED, Net::OpenTimeout => e
-    logger.error("WebHook Error => #{e}")
-    [false, e.to_s]
+    WebHookService.new(self, data, hook_name).execute
   end
 
   def async_execute(data, hook_name)
-    Sidekiq::Client.enqueue(ProjectWebHookWorker, id, data, hook_name)
-  end
-
-  private
-
-  def build_headers(hook_name)
-    headers = {
-      'Content-Type' => 'application/json',
-      'X-Gitlab-Event' => hook_name.singularize.titleize
-    }
-    headers['X-Gitlab-Token'] = token if token.present?
-    headers
+    WebHookService.new(self, data, hook_name).async_execute
   end
 end
diff --git a/app/models/hooks/web_hook_log.rb b/app/models/hooks/web_hook_log.rb
new file mode 100644
index 00000000000..2738b229d84
--- /dev/null
+++ b/app/models/hooks/web_hook_log.rb
@@ -0,0 +1,13 @@
+class WebHookLog < ActiveRecord::Base
+  belongs_to :web_hook
+
+  serialize :request_headers, Hash
+  serialize :request_data, Hash
+  serialize :response_headers, Hash
+
+  validates :web_hook, presence: true
+
+  def success?
+    response_status =~ /^2/
+  end
+end
diff --git a/app/services/web_hook_service.rb b/app/services/web_hook_service.rb
new file mode 100644
index 00000000000..4241b912d5b
--- /dev/null
+++ b/app/services/web_hook_service.rb
@@ -0,0 +1,120 @@
+class WebHookService
+  class InternalErrorResponse
+    attr_reader :body, :headers, :code
+
+    def initialize
+      @headers = HTTParty::Response::Headers.new({})
+      @body = ''
+      @code = 'internal error'
+    end
+  end
+
+  include HTTParty
+
+  # HTTParty timeout
+  default_timeout Gitlab.config.gitlab.webhook_timeout
+
+  attr_accessor :hook, :data, :hook_name
+
+  def initialize(hook, data, hook_name)
+    @hook = hook
+    @data = data
+    @hook_name = hook_name
+  end
+
+  def execute
+    start_time = Time.now
+
+    response = if parsed_url.userinfo.blank?
+                 make_request(hook.url)
+               else
+                 make_request_with_auth
+               end
+
+    log_execution(
+      trigger: hook_name,
+      url: hook.url,
+      request_data: data,
+      response: response,
+      execution_duration: Time.now - start_time
+    )
+
+    [response.code, response.to_s]
+  rescue SocketError, OpenSSL::SSL::SSLError, Errno::ECONNRESET, Errno::ECONNREFUSED, Net::OpenTimeout => e
+    log_execution(
+      trigger: hook_name,
+      url: hook.url,
+      request_data: data,
+      response: InternalErrorResponse.new,
+      execution_duration: Time.now - start_time,
+      error_message: e.to_s
+    )
+
+    Rails.logger.error("WebHook Error => #{e}")
+
+    [nil, e.to_s]
+  end
+
+  def async_execute
+    Sidekiq::Client.enqueue(WebHookWorker, hook.id, data, hook_name)
+  end
+
+  private
+
+  def parsed_url
+    @parsed_url ||= URI.parse(hook.url)
+  end
+
+  def make_request(url, basic_auth = false)
+    self.class.post(url,
+      body: data.to_json,
+      headers: build_headers(hook_name),
+      verify: hook.enable_ssl_verification,
+      basic_auth: basic_auth)
+  end
+
+  def make_request_with_auth
+    post_url = hook.url.gsub("#{parsed_url.userinfo}@", '')
+    basic_auth = {
+      username: CGI.unescape(parsed_url.user),
+      password: CGI.unescape(parsed_url.password)
+    }
+    make_request(post_url, basic_auth)
+  end
+
+  def log_execution(trigger:, url:, request_data:, response:, execution_duration:, error_message: nil)
+    # logging for ServiceHook's is not available
+    return if hook.is_a?(ServiceHook)
+
+    WebHookLog.create(
+      web_hook: hook,
+      trigger: trigger,
+      url: url,
+      execution_duration: execution_duration,
+      request_headers: build_headers(hook_name),
+      request_data: request_data,
+      response_headers: format_response_headers(response),
+      response_body: response.body,
+      response_status: response.code,
+      internal_error_message: error_message
+    )
+  end
+
+  def build_headers(hook_name)
+    @headers ||= begin
+      {
+        'Content-Type' => 'application/json',
+        'X-Gitlab-Event' => hook_name.singularize.titleize
+      }.tap do |hash|
+        hash['X-Gitlab-Token'] = hook.token if hook.token.present?
+      end
+    end
+  end
+
+  # Make response headers more stylish
+  # Net::HTTPHeader has downcased hash with arrays: { 'content-type' => ['text/html; charset=utf-8'] }
+  # This method format response to capitalized hash with strings: { 'Content-Type' => 'text/html; charset=utf-8' }
+  def format_response_headers(response)
+    response.headers.each_capitalized.to_h
+  end
+end
diff --git a/app/views/admin/hook_logs/_index.html.haml b/app/views/admin/hook_logs/_index.html.haml
new file mode 100644
index 00000000000..7dd9943190f
--- /dev/null
+++ b/app/views/admin/hook_logs/_index.html.haml
@@ -0,0 +1,37 @@
+.row.prepend-top-default.append-bottom-default
+  .col-lg-3
+    %h4.prepend-top-0
+      Recent Deliveries
+    %p When an event in GitLab triggers a webhook, you can use the request details to figure out if something went wrong.
+  .col-lg-9
+    - if hook_logs.any?
+      %table.table
+        %thead
+          %tr
+            %th Status
+            %th Trigger
+            %th URL
+            %th Elapsed time
+            %th Request time
+            %th
+        - hook_logs.each do |hook_log|
+          %tr
+            %td
+              = render partial: 'shared/hook_logs/status_label', locals: { hook_log: hook_log }
+            %td.hidden-xs
+              %span.label.label-gray.deploy-project-label
+                = hook_log.trigger.singularize.titleize
+            %td
+              = truncate(hook_log.url, length: 50)
+            %td.light
+              #{number_with_precision(hook_log.execution_duration, precision: 2)} ms
+            %td.light
+              = time_ago_with_tooltip(hook_log.created_at)
+            %td
+              = link_to 'View details', admin_hook_hook_log_path(hook, hook_log)
+
+      = paginate hook_logs, theme: 'gitlab'
+
+    - else
+      .settings-message.text-center
+        You don't have any webhooks deliveries
diff --git a/app/views/admin/hook_logs/show.html.haml b/app/views/admin/hook_logs/show.html.haml
new file mode 100644
index 00000000000..56127bacda2
--- /dev/null
+++ b/app/views/admin/hook_logs/show.html.haml
@@ -0,0 +1,10 @@
+- page_title 'Request details'
+%h3.page-title
+  Request details
+
+%hr
+
+= link_to 'Resend Request', retry_admin_hook_hook_log_path(@hook, @hook_log), class: "btn btn-default pull-right prepend-left-10"
+
+= render partial: 'shared/hook_logs/content', locals: { hook_log: @hook_log }
+
diff --git a/app/views/admin/hooks/edit.html.haml b/app/views/admin/hooks/edit.html.haml
index 0777f5e2629..0e35a1905bf 100644
--- a/app/views/admin/hooks/edit.html.haml
+++ b/app/views/admin/hooks/edit.html.haml
@@ -12,3 +12,9 @@
   = render partial: 'form', locals: { form: f, hook: @hook }
   .form-actions
     = f.submit 'Save changes', class: 'btn btn-create'
+    = link_to 'Test hook', test_admin_hook_path(@hook), class: 'btn btn-default'
+    = link_to 'Remove', admin_hook_path(@hook), method: :delete, class: 'btn btn-remove pull-right', data: { confirm: 'Are you sure?' }
+
+%hr
+
+= render partial: 'admin/hook_logs/index', locals: { hook: @hook, hook_logs: @hook_logs }
diff --git a/app/views/layouts/nav/_admin.html.haml b/app/views/layouts/nav/_admin.html.haml
index d068c895fa3..f6132464910 100644
--- a/app/views/layouts/nav/_admin.html.haml
+++ b/app/views/layouts/nav/_admin.html.haml
@@ -17,7 +17,7 @@
       = link_to admin_broadcast_messages_path, title: 'Messages' do
         %span
           Messages
-    = nav_link(controller: :hooks) do
+    = nav_link(controller: [:hooks, :hook_logs]) do
       = link_to admin_hooks_path, title: 'Hooks' do
         %span
           System Hooks
diff --git a/app/views/projects/hook_logs/_index.html.haml b/app/views/projects/hook_logs/_index.html.haml
new file mode 100644
index 00000000000..6962b223451
--- /dev/null
+++ b/app/views/projects/hook_logs/_index.html.haml
@@ -0,0 +1,37 @@
+.row.prepend-top-default.append-bottom-default
+  .col-lg-3
+    %h4.prepend-top-0
+      Recent Deliveries
+    %p When an event in GitLab triggers a webhook, you can use the request details to figure out if something went wrong.
+  .col-lg-9
+    - if hook_logs.any?
+      %table.table
+        %thead
+          %tr
+            %th Status
+            %th Trigger
+            %th URL
+            %th Elapsed time
+            %th Request time
+            %th
+        - hook_logs.each do |hook_log|
+          %tr
+            %td
+              = render partial: 'shared/hook_logs/status_label', locals: { hook_log: hook_log }
+            %td.hidden-xs
+              %span.label.label-gray.deploy-project-label
+                = hook_log.trigger.singularize.titleize
+            %td
+              = truncate(hook_log.url, length: 50)
+            %td.light
+              #{number_with_precision(hook_log.execution_duration, precision: 2)} ms
+            %td.light
+              = time_ago_with_tooltip(hook_log.created_at)
+            %td
+              = link_to 'View details', namespace_project_hook_hook_log_path(project.namespace, project, hook, hook_log)
+
+      = paginate hook_logs, theme: 'gitlab'
+
+    - else
+      .settings-message.text-center
+        You don't have any webhooks deliveries
diff --git a/app/views/projects/hook_logs/show.html.haml b/app/views/projects/hook_logs/show.html.haml
new file mode 100644
index 00000000000..2eabe92f8eb
--- /dev/null
+++ b/app/views/projects/hook_logs/show.html.haml
@@ -0,0 +1,11 @@
+= render 'projects/settings/head'
+
+.row.prepend-top-default.append-bottom-default
+  .col-lg-3
+    %h4.prepend-top-0
+      Request details
+  .col-lg-9
+
+    = link_to 'Resend Request', retry_namespace_project_hook_hook_log_path(@project.namespace, @project, @hook, @hook_log), class: "btn btn-default pull-right prepend-left-10"
+
+    = render partial: 'shared/hook_logs/content', locals: { hook_log: @hook_log }
diff --git a/app/views/projects/hooks/edit.html.haml b/app/views/projects/hooks/edit.html.haml
index 7998713be1f..fd382c1d63f 100644
--- a/app/views/projects/hooks/edit.html.haml
+++ b/app/views/projects/hooks/edit.html.haml
@@ -1,3 +1,4 @@
+- page_title 'Integrations'
 = render 'projects/settings/head'
 
 .row.prepend-top-default
@@ -10,5 +11,12 @@
   .col-lg-9.append-bottom-default
     = form_for [@project.namespace.becomes(Namespace), @project, @hook], as: :hook, url: namespace_project_hook_path do |f|
       = render partial: 'shared/web_hooks/form', locals: { form: f, hook: @hook }
+
       = f.submit 'Save changes', class: 'btn btn-create'
+      = link_to 'Test hook', test_namespace_project_hook_path(@project.namespace, @project, @hook), class: 'btn btn-default'
+      = link_to 'Remove', namespace_project_hook_path(@project.namespace, @project, @hook), method: :delete, class: 'btn btn-remove pull-right', data: { confirm: 'Are you sure?' }
+
+%hr
+
+= render partial: 'projects/hook_logs/index', locals: { hook: @hook, hook_logs: @hook_logs, project: @project }
 
diff --git a/app/views/projects/settings/_head.html.haml b/app/views/projects/settings/_head.html.haml
index 8c7f9e0191e..6d36df4c2a0 100644
--- a/app/views/projects/settings/_head.html.haml
+++ b/app/views/projects/settings/_head.html.haml
@@ -14,7 +14,7 @@
             %span
               Members
         - if can_edit
-          = nav_link(controller: [:integrations, :services, :hooks]) do
+          = nav_link(controller: [:integrations, :services, :hooks, :hook_logs]) do
             = link_to project_settings_integrations_path(@project), title: 'Integrations' do
               %span
                 Integrations
diff --git a/app/views/shared/hook_logs/_content.html.haml b/app/views/shared/hook_logs/_content.html.haml
new file mode 100644
index 00000000000..af6a499fadb
--- /dev/null
+++ b/app/views/shared/hook_logs/_content.html.haml
@@ -0,0 +1,44 @@
+%p
+  %strong Request URL:
+  POST
+  = hook_log.url
+  = render partial: 'shared/hook_logs/status_label', locals: { hook_log: hook_log }
+
+%p
+  %strong Trigger:
+  %td.hidden-xs
+    %span.label.label-gray.deploy-project-label
+      = hook_log.trigger.singularize.titleize
+%p
+  %strong Elapsed time:
+  #{number_with_precision(hook_log.execution_duration, precision: 2)} ms
+%p
+  %strong Request time:
+  = time_ago_with_tooltip(hook_log.created_at)
+
+%hr
+
+- if hook_log.internal_error_message.present?
+  .bs-callout.bs-callout-danger
+    = hook_log.internal_error_message
+
+%h5 Request headers:
+%pre
+  - hook_log.request_headers.each do |k,v|
+    <strong>#{k}:</strong> #{v}
+    %br
+
+%h5 Request body:
+%pre
+  :plain
+    #{JSON.pretty_generate(hook_log.request_data)}
+%h5 Response headers:
+%pre
+  - hook_log.response_headers.each do |k,v|
+    <strong>#{k}:</strong> #{v}
+    %br
+
+%h5 Response body:
+%pre
+  :plain
+    #{hook_log.response_body}
diff --git a/app/views/shared/hook_logs/_status_label.html.haml b/app/views/shared/hook_logs/_status_label.html.haml
new file mode 100644
index 00000000000..b4ea8e6f952
--- /dev/null
+++ b/app/views/shared/hook_logs/_status_label.html.haml
@@ -0,0 +1,3 @@
+- label_status = hook_log.success? ? 'label-success' : 'label-danger'
+%span{ class: "label #{label_status}" }
+  = hook_log.response_status
diff --git a/app/workers/remove_old_web_hook_logs_worker.rb b/app/workers/remove_old_web_hook_logs_worker.rb
new file mode 100644
index 00000000000..555e1bb8691
--- /dev/null
+++ b/app/workers/remove_old_web_hook_logs_worker.rb
@@ -0,0 +1,10 @@
+class RemoveOldWebHookLogsWorker
+  include Sidekiq::Worker
+  include CronjobQueue
+
+  WEB_HOOK_LOG_LIFETIME = 2.days
+
+  def perform
+    WebHookLog.destroy_all(['created_at < ?', Time.now - WEB_HOOK_LOG_LIFETIME])
+  end
+end
diff --git a/app/workers/system_hook_worker.rb b/app/workers/system_hook_worker.rb
deleted file mode 100644
index 55d4e7d6dab..00000000000
--- a/app/workers/system_hook_worker.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-class SystemHookWorker
-  include Sidekiq::Worker
-  include DedicatedSidekiqQueue
-
-  sidekiq_options retry: 4
-
-  def perform(hook_id, data, hook_name)
-    SystemHook.find(hook_id).execute(data, hook_name)
-  end
-end
diff --git a/app/workers/project_web_hook_worker.rb b/app/workers/web_hook_worker.rb
index d973e662ff2..ad5ddf02a12 100644
--- a/app/workers/project_web_hook_worker.rb
+++ b/app/workers/web_hook_worker.rb
@@ -1,11 +1,13 @@
-class ProjectWebHookWorker
+class WebHookWorker
   include Sidekiq::Worker
   include DedicatedSidekiqQueue
 
   sidekiq_options retry: 4
 
   def perform(hook_id, data, hook_name)
+    hook = WebHook.find(hook_id)
     data = data.with_indifferent_access
-    WebHook.find(hook_id).execute(data, hook_name)
+
+    WebHookService.new(hook, data, hook_name).execute
   end
 end
diff --git a/changelogs/unreleased/12614-fix-long-message-from-mr.yml b/changelogs/unreleased/12614-fix-long-message-from-mr.yml
new file mode 100644
index 00000000000..30408ea4216
--- /dev/null
+++ b/changelogs/unreleased/12614-fix-long-message-from-mr.yml
@@ -0,0 +1,4 @@
+---
+title: Implement web hook logging
+merge_request: 11027
+author: Alexander Randa
diff --git a/config/initializers/1_settings.rb b/config/initializers/1_settings.rb
index ea1815f500a..130bf3ef622 100644
--- a/config/initializers/1_settings.rb
+++ b/config/initializers/1_settings.rb
@@ -368,11 +368,14 @@ Settings.cron_jobs['gitlab_usage_ping_worker'] ||= Settingslogic.new({})
 Settings.cron_jobs['gitlab_usage_ping_worker']['cron'] ||= Settings.__send__(:cron_random_weekly_time)
 Settings.cron_jobs['gitlab_usage_ping_worker']['job_class'] = 'GitlabUsagePingWorker'
 
-# Every day at 00:30
 Settings.cron_jobs['schedule_update_user_activity_worker'] ||= Settingslogic.new({})
 Settings.cron_jobs['schedule_update_user_activity_worker']['cron'] ||= '30 0 * * *'
 Settings.cron_jobs['schedule_update_user_activity_worker']['job_class'] = 'ScheduleUpdateUserActivityWorker'
 
+Settings.cron_jobs['remove_old_web_hook_logs_worker'] ||= Settingslogic.new({})
+Settings.cron_jobs['remove_old_web_hook_logs_worker']['cron'] ||= '40 0 * * *'
+Settings.cron_jobs['remove_old_web_hook_logs_worker']['job_class'] = 'RemoveOldWebHookLogsWorker'
+
 #
 # GitLab Shell
 #
diff --git a/config/routes/admin.rb b/config/routes/admin.rb
index 48993420ed9..f6eb1086321 100644
--- a/config/routes/admin.rb
+++ b/config/routes/admin.rb
@@ -54,6 +54,12 @@ namespace :admin do
     member do
       get :test
     end
+
+    resources :hook_logs, only: [:show] do
+      member do
+        get :retry
+      end
+    end
   end
 
   resources :broadcast_messages, only: [:index, :edit, :create, :update, :destroy] do
diff --git a/config/routes/project.rb b/config/routes/project.rb
index c786cbdee1e..b9543f7a39d 100644
--- a/config/routes/project.rb
+++ b/config/routes/project.rb
@@ -202,6 +202,12 @@ constraints(ProjectUrlConstrainer.new) do
         member do
           get :test
         end
+
+        resources :hook_logs, only: [:show] do
+          member do
+            get :retry
+          end
+        end
       end
 
       resources :container_registry, only: [:index, :destroy],
diff --git a/config/sidekiq_queues.yml b/config/sidekiq_queues.yml
index 0ca1f565185..93df2d6f5ff 100644
--- a/config/sidekiq_queues.yml
+++ b/config/sidekiq_queues.yml
@@ -44,9 +44,8 @@
   - [project_cache, 1]
   - [project_destroy, 1]
   - [project_export, 1]
-  - [project_web_hook, 1]
+  - [web_hook, 1]
   - [repository_check, 1]
-  - [system_hook, 1]
   - [git_garbage_collect, 1]
   - [reactive_caching, 1]
   - [cronjob, 1]
diff --git a/db/migrate/20170427103502_create_web_hook_logs.rb b/db/migrate/20170427103502_create_web_hook_logs.rb
new file mode 100644
index 00000000000..3643c52180c
--- /dev/null
+++ b/db/migrate/20170427103502_create_web_hook_logs.rb
@@ -0,0 +1,22 @@
+# rubocop:disable all
+class CreateWebHookLogs < ActiveRecord::Migration
+  DOWNTIME = false
+
+  def change
+    create_table :web_hook_logs do |t|
+      t.references :web_hook, null: false, index: true, foreign_key: { on_delete: :cascade }
+
+      t.string :trigger
+      t.string :url
+      t.text :request_headers
+      t.text :request_data
+      t.text :response_headers
+      t.text :response_body
+      t.string :response_status
+      t.float :execution_duration
+      t.string :internal_error_message
+
+      t.timestamps null: false
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 294e0b531eb..de9d428f25d 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1388,6 +1388,23 @@ ActiveRecord::Schema.define(version: 20170516183131) do
   add_index "users_star_projects", ["project_id"], name: "index_users_star_projects_on_project_id", using: :btree
   add_index "users_star_projects", ["user_id", "project_id"], name: "index_users_star_projects_on_user_id_and_project_id", unique: true, using: :btree
 
+  create_table "web_hook_logs", force: :cascade do |t|
+    t.integer "web_hook_id", null: false
+    t.string "trigger"
+    t.string "url"
+    t.text "request_headers"
+    t.text "request_data"
+    t.text "response_headers"
+    t.text "response_body"
+    t.string "response_status"
+    t.float "execution_duration"
+    t.string "internal_error_message"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
+  add_index "web_hook_logs", ["web_hook_id"], name: "index_web_hook_logs_on_web_hook_id", using: :btree
+
   create_table "web_hooks", force: :cascade do |t|
     t.string "url", limit: 2000
     t.integer "project_id"
@@ -1451,4 +1468,5 @@ ActiveRecord::Schema.define(version: 20170516183131) do
   add_foreign_key "timelogs", "merge_requests", name: "fk_timelogs_merge_requests_merge_request_id", on_delete: :cascade
   add_foreign_key "trending_projects", "projects", on_delete: :cascade
   add_foreign_key "u2f_registrations", "users"
+  add_foreign_key "web_hook_logs", "web_hooks", on_delete: :cascade
 end
diff --git a/doc/user/project/integrations/img/webhook_logs.png b/doc/user/project/integrations/img/webhook_logs.png
new file mode 100755
index 00000000000..917068d9398
--- /dev/null
+++ b/doc/user/project/integrations/img/webhook_logs.png
diff --git a/doc/user/project/integrations/webhooks.md b/doc/user/project/integrations/webhooks.md
index 48d49c5d40c..d0bb1cd11a8 100644
--- a/doc/user/project/integrations/webhooks.md
+++ b/doc/user/project/integrations/webhooks.md
@@ -1017,6 +1017,22 @@ X-Gitlab-Event: Build Hook
 }
 ```
 
+## Troubleshoot webhooks
+
+Gitlab stores each perform of the webhook.
+You can find records for last 2 days in "Recent Deliveries" section on the edit page of each webhook.
+
+![Recent deliveries](img/webhook_logs.png)
+
+In this section you can see HTTP status code (green for 200-299 codes, red for the others, `internal error` for failed deliveries ), triggered event, a time when the event was called, elapsed time of the request.
+
+If you need more information about execution, you can click `View details` link.
+On this page, you can see data that GitLab sends (request headers and body) and data that it received (response headers and body).
+
+From this page, you can repeat delivery with the same data by clicking `Resend Request` button.
+
+>**Note:** If URL or secret token of the webhook were updated, data will be delivered to the new address.
+
 ## Example webhook receiver
 
 If you want to see GitLab's webhooks in action for testing purposes you can use
diff --git a/features/project/hooks.feature b/features/project/hooks.feature
deleted file mode 100644
index 627738004c4..00000000000
--- a/features/project/hooks.feature
+++ /dev/null
@@ -1,37 +0,0 @@
-Feature: Project Hooks
-  Background:
-    Given I sign in as a user
-    And I own project "Shop"
-
-  Scenario: I should see hook list
-    Given project has hook
-    When I visit project hooks page
-    Then I should see project hook
-
-  Scenario: I add new hook
-    Given I visit project hooks page
-    When I submit new hook
-    Then I should see newly created hook
-
-  Scenario: I add new hook with SSL verification enabled
-    Given I visit project hooks page
-    When I submit new hook with SSL verification enabled
-    Then I should see newly created hook with SSL verification enabled
-
-  Scenario: I test hook
-    Given project has hook
-    And I visit project hooks page
-    When I click test hook button
-    Then hook should be triggered
-
-  Scenario: I test a hook on empty project
-    Given I own empty project with hook
-    And I visit project hooks page
-    When I click test hook button
-    Then I should see hook error message
-
-  Scenario: I test a hook on down URL
-    Given project has hook
-    And I visit project hooks page
-    When I click test hook button with invalid URL
-    Then I should see hook service down error message
diff --git a/features/steps/project/hooks.rb b/features/steps/project/hooks.rb
deleted file mode 100644
index 945d58a6458..00000000000
--- a/features/steps/project/hooks.rb
+++ /dev/null
@@ -1,75 +0,0 @@
-require 'webmock'
-
-class Spinach::Features::ProjectHooks < Spinach::FeatureSteps
-  include SharedAuthentication
-  include SharedProject
-  include SharedPaths
-  include RSpec::Matchers
-  include RSpec::Mocks::ExampleMethods
-  include WebMock::API
-
-  step 'project has hook' do
-    @hook = create(:project_hook, project: current_project)
-  end
-
-  step 'I own empty project with hook' do
-    @project = create(:empty_project,
-                      name: 'Empty Project', namespace: @user.namespace)
-    @hook = create(:project_hook, project: current_project)
-  end
-
-  step 'I should see project hook' do
-    expect(page).to have_content @hook.url
-  end
-
-  step 'I submit new hook' do
-    @url = 'http://example.org/1'
-    fill_in "hook_url", with: @url
-    expect { click_button "Add webhook" }.to change(ProjectHook, :count).by(1)
-  end
-
-  step 'I submit new hook with SSL verification enabled' do
-    @url = 'http://example.org/2'
-    fill_in "hook_url", with: @url
-    check "hook_enable_ssl_verification"
-    expect { click_button "Add webhook" }.to change(ProjectHook, :count).by(1)
-  end
-
-  step 'I should see newly created hook' do
-    expect(current_path).to eq namespace_project_settings_integrations_path(current_project.namespace, current_project)
-    expect(page).to have_content(@url)
-  end
-
-  step 'I should see newly created hook with SSL verification enabled' do
-    expect(current_path).to eq namespace_project_settings_integrations_path(current_project.namespace, current_project)
-    expect(page).to have_content(@url)
-    expect(page).to have_content("SSL Verification: enabled")
-  end
-
-  step 'I click test hook button' do
-    stub_request(:post, @hook.url).to_return(status: 200)
-    click_link 'Test'
-  end
-
-  step 'I click test hook button with invalid URL' do
-    stub_request(:post, @hook.url).to_raise(SocketError)
-    click_link 'Test'
-  end
-
-  step 'hook should be triggered' do
-    expect(current_path).to eq namespace_project_settings_integrations_path(current_project.namespace, current_project)
-    expect(page).to have_selector '.flash-notice',
-                              text: 'Hook executed successfully: HTTP 200'
-  end
-
-  step 'I should see hook error message' do
-    expect(page).to have_selector '.flash-alert',
-                              text: 'Hook execution failed. '\
-                              'Ensure the project has commits.'
-  end
-
-  step 'I should see hook service down error message' do
-    expect(page).to have_selector '.flash-alert',
-                              text: 'Hook execution failed: Exception from'
-  end
-end
diff --git a/spec/factories/web_hook_log.rb b/spec/factories/web_hook_log.rb
new file mode 100644
index 00000000000..230b3f6b26e
--- /dev/null
+++ b/spec/factories/web_hook_log.rb
@@ -0,0 +1,14 @@
+FactoryGirl.define do
+  factory :web_hook_log do
+    web_hook factory: :project_hook
+    trigger 'push_hooks'
+    url { generate(:url) }
+    request_headers {}
+    request_data {}
+    response_headers {}
+    response_body ''
+    response_status '200'
+    execution_duration 2.0
+    internal_error_message nil
+  end
+end
diff --git a/spec/features/admin/admin_hook_logs_spec.rb b/spec/features/admin/admin_hook_logs_spec.rb
new file mode 100644
index 00000000000..5b67f4de6ac
--- /dev/null
+++ b/spec/features/admin/admin_hook_logs_spec.rb
@@ -0,0 +1,40 @@
+require 'spec_helper'
+
+feature 'Admin::HookLogs', feature: true do
+  let(:project) { create(:project) }
+  let(:system_hook) { create(:system_hook) }
+  let(:hook_log) { create(:web_hook_log, web_hook: system_hook, internal_error_message: 'some error') }
+
+  before do
+    login_as :admin
+  end
+
+  scenario 'show list of hook logs' do
+    hook_log
+    visit edit_admin_hook_path(system_hook)
+
+    expect(page).to have_content('Recent Deliveries')
+    expect(page).to have_content(hook_log.url)
+  end
+
+  scenario 'show hook log details' do
+    hook_log
+    visit edit_admin_hook_path(system_hook)
+    click_link 'View details'
+
+    expect(page).to have_content("POST #{hook_log.url}")
+    expect(page).to have_content(hook_log.internal_error_message)
+    expect(page).to have_content('Resend Request')
+  end
+
+  scenario 'retry hook log' do
+    WebMock.stub_request(:post, system_hook.url)
+
+    hook_log
+    visit edit_admin_hook_path(system_hook)
+    click_link 'View details'
+    click_link 'Resend Request'
+
+    expect(current_path).to eq(edit_admin_hook_path(system_hook))
+  end
+end
diff --git a/spec/features/admin/admin_hooks_spec.rb b/spec/features/admin/admin_hooks_spec.rb
index c5f24d412d7..80f7ec43c06 100644
--- a/spec/features/admin/admin_hooks_spec.rb
+++ b/spec/features/admin/admin_hooks_spec.rb
@@ -58,10 +58,19 @@ describe 'Admin::Hooks', feature: true do
   end
 
   describe 'Remove existing hook' do
-    it 'remove existing hook' do
-      visit admin_hooks_path
+    context 'removes existing hook' do
+      it 'from hooks list page' do
+        visit admin_hooks_path
+
+        expect { click_link 'Remove' }.to change(SystemHook, :count).by(-1)
+      end
 
-      expect { click_link 'Remove' }.to change(SystemHook, :count).by(-1)
+      it 'from hook edit page' do
+        visit admin_hooks_path
+        click_link 'Edit'
+
+        expect { click_link 'Remove' }.to change(SystemHook, :count).by(-1)
+      end
     end
   end
 
diff --git a/spec/features/projects/settings/integration_settings_spec.rb b/spec/features/projects/settings/integration_settings_spec.rb
index d3232f0cc16..fbaea14a2be 100644
--- a/spec/features/projects/settings/integration_settings_spec.rb
+++ b/spec/features/projects/settings/integration_settings_spec.rb
@@ -85,11 +85,55 @@ feature 'Integration settings', feature: true do
         expect(current_path).to eq(integrations_path)
       end
 
-      scenario 'remove existing webhook' do
-        hook
-        visit integrations_path
+      context 'remove existing webhook' do
+        scenario 'from webhooks list page' do
+          hook
+          visit integrations_path
+
+          expect { click_link 'Remove' }.to change(ProjectHook, :count).by(-1)
+        end
+
+        scenario 'from webhook edit page' do
+          hook
+          visit integrations_path
+          click_link 'Edit'
+
+          expect { click_link 'Remove' }.to change(ProjectHook, :count).by(-1)
+        end
+      end
+    end
+
+    context 'Webhook logs' do
+      let(:hook) { create(:project_hook, project: project) }
+      let(:hook_log) { create(:web_hook_log, web_hook: hook, internal_error_message: 'some error') }
+
+      scenario 'show list of hook logs' do
+        hook_log
+        visit edit_namespace_project_hook_path(project.namespace, project, hook)
+
+        expect(page).to have_content('Recent Deliveries')
+        expect(page).to have_content(hook_log.url)
+      end
+
+      scenario 'show hook log details' do
+        hook_log
+        visit edit_namespace_project_hook_path(project.namespace, project, hook)
+        click_link 'View details'
+
+        expect(page).to have_content("POST #{hook_log.url}")
+        expect(page).to have_content(hook_log.internal_error_message)
+        expect(page).to have_content('Resend Request')
+      end
+
+      scenario 'retry hook log' do
+        WebMock.stub_request(:post, hook.url)
+
+        hook_log
+        visit edit_namespace_project_hook_path(project.namespace, project, hook)
+        click_link 'View details'
+        click_link 'Resend Request'
 
-        expect { click_link 'Remove' }.to change(ProjectHook, :count).by(-1)
+        expect(current_path).to eq(edit_namespace_project_hook_path(project.namespace, project, hook))
       end
     end
   end
diff --git a/spec/lib/gitlab/import_export/all_models.yml b/spec/lib/gitlab/import_export/all_models.yml
index 34f617e23a5..2e9646286df 100644
--- a/spec/lib/gitlab/import_export/all_models.yml
+++ b/spec/lib/gitlab/import_export/all_models.yml
@@ -131,6 +131,7 @@ services:
 - service_hook
 hooks:
 - project
+- web_hook_logs
 protected_branches:
 - project
 - merge_access_levels
diff --git a/spec/models/ci/pipeline_spec.rb b/spec/models/ci/pipeline_spec.rb
index 157d17fbb68..6fb4c4472c0 100644
--- a/spec/models/ci/pipeline_spec.rb
+++ b/spec/models/ci/pipeline_spec.rb
@@ -955,7 +955,7 @@ describe Ci::Pipeline, models: true do
     end
 
     before do
-      ProjectWebHookWorker.drain
+      WebHookWorker.drain
     end
 
     context 'with pipeline hooks enabled' do
diff --git a/spec/models/hooks/service_hook_spec.rb b/spec/models/hooks/service_hook_spec.rb
index 1a83c836652..57454d2a773 100644
--- a/spec/models/hooks/service_hook_spec.rb
+++ b/spec/models/hooks/service_hook_spec.rb
@@ -1,36 +1,19 @@
-require "spec_helper"
+require 'spec_helper'
 
 describe ServiceHook, models: true do
-  describe "Associations" do
+  describe 'associations' do
     it { is_expected.to belong_to :service }
   end
 
-  describe "execute" do
-    before(:each) do
-      @service_hook = create(:service_hook)
-      @data = { project_id: 1, data: {} }
+  describe 'execute' do
+    let(:hook) { build(:service_hook) }
+    let(:data) { { key: 'value' } }
 
-      WebMock.stub_request(:post, @service_hook.url)
-    end
-
-    it "POSTs to the webhook URL" do
-      @service_hook.execute(@data)
-      expect(WebMock).to have_requested(:post, @service_hook.url).with(
-        headers: { 'Content-Type' => 'application/json', 'X-Gitlab-Event' => 'Service Hook' }
-      ).once
-    end
-
-    it "POSTs the data as JSON" do
-      @service_hook.execute(@data)
-      expect(WebMock).to have_requested(:post, @service_hook.url).with(
-        headers: { 'Content-Type' => 'application/json', 'X-Gitlab-Event' => 'Service Hook' }
-      ).once
-    end
-
-    it "catches exceptions" do
-      expect(WebHook).to receive(:post).and_raise("Some HTTP Post error")
+    it '#execute' do
+      expect(WebHookService).to receive(:new).with(hook, data, 'service_hook').and_call_original
+      expect_any_instance_of(WebHookService).to receive(:execute)
 
-      expect { @service_hook.execute(@data) }.to raise_error(RuntimeError)
+      hook.execute(data)
     end
   end
 end
diff --git a/spec/models/hooks/system_hook_spec.rb b/spec/models/hooks/system_hook_spec.rb
index 4340170888d..0d2b622132e 100644
--- a/spec/models/hooks/system_hook_spec.rb
+++ b/spec/models/hooks/system_hook_spec.rb
@@ -126,4 +126,26 @@ describe SystemHook, models: true do
       expect(SystemHook.repository_update_hooks).to eq([hook])
     end
   end
+
+  describe 'execute WebHookService' do
+    let(:hook) { build(:system_hook) }
+    let(:data) { { key: 'value' } }
+    let(:hook_name) { 'system_hook' }
+
+    before do
+      expect(WebHookService).to receive(:new).with(hook, data, hook_name).and_call_original
+    end
+
+    it '#execute' do
+      expect_any_instance_of(WebHookService).to receive(:execute)
+
+      hook.execute(data, hook_name)
+    end
+
+    it '#async_execute' do
+      expect_any_instance_of(WebHookService).to receive(:async_execute)
+
+      hook.async_execute(data, hook_name)
+    end
+  end
 end
diff --git a/spec/models/hooks/web_hook_log_spec.rb b/spec/models/hooks/web_hook_log_spec.rb
new file mode 100644
index 00000000000..c649cf3b589
--- /dev/null
+++ b/spec/models/hooks/web_hook_log_spec.rb
@@ -0,0 +1,30 @@
+require 'rails_helper'
+
+describe WebHookLog, models: true do
+  it { is_expected.to belong_to(:web_hook) }
+
+  it { is_expected.to serialize(:request_headers).as(Hash) }
+  it { is_expected.to serialize(:request_data).as(Hash) }
+  it { is_expected.to serialize(:response_headers).as(Hash) }
+
+  it { is_expected.to validate_presence_of(:web_hook) }
+
+  describe '#success?' do
+    let(:web_hook_log) { build(:web_hook_log, response_status: status) }
+
+    describe '2xx' do
+      let(:status) { '200' }
+      it { expect(web_hook_log.success?).to be_truthy }
+    end
+
+    describe 'not 2xx' do
+      let(:status) { '500' }
+      it { expect(web_hook_log.success?).to be_falsey }
+    end
+
+    describe 'internal erorr' do
+      let(:status) { 'internal error' }
+      it { expect(web_hook_log.success?).to be_falsey }
+    end
+  end
+end
diff --git a/spec/models/hooks/web_hook_spec.rb b/spec/models/hooks/web_hook_spec.rb
index 9d4db1bfb52..53157c24477 100644
--- a/spec/models/hooks/web_hook_spec.rb
+++ b/spec/models/hooks/web_hook_spec.rb
@@ -1,89 +1,54 @@
 require 'spec_helper'
 
 describe WebHook, models: true do
-  describe "Validations" do
+  let(:hook) { build(:project_hook) }
+
+  describe 'associations' do
+    it { is_expected.to have_many(:web_hook_logs).dependent(:destroy) }
+  end
+
+  describe 'validations' do
     it { is_expected.to validate_presence_of(:url) }
 
     describe 'url' do
-      it { is_expected.to allow_value("http://example.com").for(:url) }
-      it { is_expected.to allow_value("https://example.com").for(:url) }
-      it { is_expected.to allow_value(" https://example.com ").for(:url) }
-      it { is_expected.to allow_value("http://test.com/api").for(:url) }
-      it { is_expected.to allow_value("http://test.com/api?key=abc").for(:url) }
-      it { is_expected.to allow_value("http://test.com/api?key=abc&type=def").for(:url) }
+      it { is_expected.to allow_value('http://example.com').for(:url) }
+      it { is_expected.to allow_value('https://example.com').for(:url) }
+      it { is_expected.to allow_value(' https://example.com ').for(:url) }
+      it { is_expected.to allow_value('http://test.com/api').for(:url) }
+      it { is_expected.to allow_value('http://test.com/api?key=abc').for(:url) }
+      it { is_expected.to allow_value('http://test.com/api?key=abc&type=def').for(:url) }
 
-      it { is_expected.not_to allow_value("example.com").for(:url) }
-      it { is_expected.not_to allow_value("ftp://example.com").for(:url) }
-      it { is_expected.not_to allow_value("herp-and-derp").for(:url) }
+      it { is_expected.not_to allow_value('example.com').for(:url) }
+      it { is_expected.not_to allow_value('ftp://example.com').for(:url) }
+      it { is_expected.not_to allow_value('herp-and-derp').for(:url) }
 
       it 'strips :url before saving it' do
-        hook = create(:project_hook, url: ' https://example.com ')
+        hook.url = ' https://example.com '
+        hook.save
 
         expect(hook.url).to eq('https://example.com')
       end
     end
   end
 
-  describe "execute" do
-    let(:project) { create(:empty_project) }
-    let(:project_hook) { create(:project_hook) }
-
-    before(:each) do
-      project.hooks << [project_hook]
-      @data = { before: 'oldrev', after: 'newrev', ref: 'ref' }
-
-      WebMock.stub_request(:post, project_hook.url)
-    end
-
-    context 'when token is defined' do
-      let(:project_hook) { create(:project_hook, :token) }
-
-      it 'POSTs to the webhook URL' do
-        project_hook.execute(@data, 'push_hooks')
-        expect(WebMock).to have_requested(:post, project_hook.url).with(
-          headers: { 'Content-Type' => 'application/json',
-                     'X-Gitlab-Event' => 'Push Hook',
-                     'X-Gitlab-Token' => project_hook.token }
-        ).once
-      end
-    end
-
-    it "POSTs to the webhook URL" do
-      project_hook.execute(@data, 'push_hooks')
-      expect(WebMock).to have_requested(:post, project_hook.url).with(
-        headers: { 'Content-Type' => 'application/json', 'X-Gitlab-Event' => 'Push Hook' }
-      ).once
-    end
-
-    it "POSTs the data as JSON" do
-      project_hook.execute(@data, 'push_hooks')
-      expect(WebMock).to have_requested(:post, project_hook.url).with(
-        headers: { 'Content-Type' => 'application/json', 'X-Gitlab-Event' => 'Push Hook' }
-      ).once
-    end
-
-    it "catches exceptions" do
-      expect(WebHook).to receive(:post).and_raise("Some HTTP Post error")
-
-      expect { project_hook.execute(@data, 'push_hooks') }.to raise_error(RuntimeError)
-    end
-
-    it "handles SSL exceptions" do
-      expect(WebHook).to receive(:post).and_raise(OpenSSL::SSL::SSLError.new('SSL error'))
+  describe 'execute' do
+    let(:data) { { key: 'value' } }
+    let(:hook_name) { 'project hook' }
 
-      expect(project_hook.execute(@data, 'push_hooks')).to eq([false, 'SSL error'])
+    before do
+      expect(WebHookService).to receive(:new).with(hook, data, hook_name).and_call_original
     end
 
-    it "handles 200 status code" do
-      WebMock.stub_request(:post, project_hook.url).to_return(status: 200, body: "Success")
+    it '#execute' do
+      expect_any_instance_of(WebHookService).to receive(:execute)
 
-      expect(project_hook.execute(@data, 'push_hooks')).to eq([200, 'Success'])
+      hook.execute(data, hook_name)
     end
 
-    it "handles 2xx status codes" do
-      WebMock.stub_request(:post, project_hook.url).to_return(status: 201, body: "Success")
+    it '#async_execute' do
+      expect_any_instance_of(WebHookService).to receive(:async_execute)
 
-      expect(project_hook.execute(@data, 'push_hooks')).to eq([201, 'Success'])
+      hook.async_execute(data, hook_name)
     end
   end
 end
diff --git a/spec/routing/admin_routing_spec.rb b/spec/routing/admin_routing_spec.rb
index e5fc0b676af..179fc9733ad 100644
--- a/spec/routing/admin_routing_spec.rb
+++ b/spec/routing/admin_routing_spec.rb
@@ -103,6 +103,18 @@ describe Admin::HooksController, "routing" do
   end
 end
 
+# admin_hook_hook_log_retry GET    /admin/hooks/:hook_id/hook_logs/:id/retry(.:format) admin/hook_logs#retry
+# admin_hook_hook_log       GET    /admin/hooks/:hook_id/hook_logs/:id(.:format)       admin/hook_logs#show
+describe Admin::HookLogsController, 'routing' do
+  it 'to #retry' do
+    expect(get('/admin/hooks/1/hook_logs/1/retry')).to route_to('admin/hook_logs#retry', hook_id: '1', id: '1')
+  end
+
+  it 'to #show' do
+    expect(get('/admin/hooks/1/hook_logs/1')).to route_to('admin/hook_logs#show', hook_id: '1', id: '1')
+  end
+end
+
 # admin_logs GET    /admin/logs(.:format) admin/logs#show
 describe Admin::LogsController, "routing" do
   it "to #show" do
diff --git a/spec/routing/project_routing_spec.rb b/spec/routing/project_routing_spec.rb
index 50e96d56191..982e5c1b459 100644
--- a/spec/routing/project_routing_spec.rb
+++ b/spec/routing/project_routing_spec.rb
@@ -354,6 +354,18 @@ describe 'project routing' do
     end
   end
 
+  # retry_namespace_project_hook_hook_log GET /:project_id/hooks/:hook_id/hook_logs/:id/retry(.:format) projects/hook_logs#retry
+  # namespace_project_hook_hook_log       GET /:project_id/hooks/:hook_id/hook_logs/:id(.:format)       projects/hook_logs#show
+  describe Projects::HookLogsController, 'routing' do
+    it 'to #retry' do
+      expect(get('/gitlab/gitlabhq/hooks/1/hook_logs/1/retry')).to route_to('projects/hook_logs#retry', namespace_id: 'gitlab', project_id: 'gitlabhq', hook_id: '1', id: '1')
+    end
+
+    it 'to #show' do
+      expect(get('/gitlab/gitlabhq/hooks/1/hook_logs/1')).to route_to('projects/hook_logs#show', namespace_id: 'gitlab', project_id: 'gitlabhq', hook_id: '1', id: '1')
+    end
+  end
+
   # project_commit GET    /:project_id/commit/:id(.:format) commit#show {id: /\h{7,40}/, project_id: /[^\/]+/}
   describe Projects::CommitController, 'routing' do
     it 'to #show' do
diff --git a/spec/services/web_hook_service_spec.rb b/spec/services/web_hook_service_spec.rb
new file mode 100644
index 00000000000..b5abc46e80c
--- /dev/null
+++ b/spec/services/web_hook_service_spec.rb
@@ -0,0 +1,137 @@
+require 'spec_helper'
+
+describe WebHookService, services: true do
+  let(:project) { create(:empty_project) }
+  let(:project_hook) { create(:project_hook) }
+  let(:headers) do
+    {
+      'Content-Type' => 'application/json',
+      'X-Gitlab-Event' => 'Push Hook'
+    }
+  end
+  let(:data) do
+    { before: 'oldrev', after: 'newrev', ref: 'ref' }
+  end
+  let(:service_instance) { WebHookService.new(project_hook, data, 'push_hooks') }
+
+  describe '#execute' do
+    before(:each) do
+      project.hooks << [project_hook]
+
+      WebMock.stub_request(:post, project_hook.url)
+    end
+
+    context 'when token is defined' do
+      let(:project_hook) { create(:project_hook, :token) }
+
+      it 'POSTs to the webhook URL' do
+        service_instance.execute
+        expect(WebMock).to have_requested(:post, project_hook.url).with(
+          headers: headers.merge({ 'X-Gitlab-Token' => project_hook.token })
+        ).once
+      end
+    end
+
+    it 'POSTs to the webhook URL' do
+      service_instance.execute
+      expect(WebMock).to have_requested(:post, project_hook.url).with(
+        headers: headers
+      ).once
+    end
+
+    it 'POSTs the data as JSON' do
+      service_instance.execute
+      expect(WebMock).to have_requested(:post, project_hook.url).with(
+        headers: headers
+      ).once
+    end
+
+    it 'catches exceptions' do
+      WebMock.stub_request(:post, project_hook.url).to_raise(StandardError.new('Some error'))
+
+      expect { service_instance.execute }.to raise_error(StandardError)
+    end
+
+    it 'handles exceptions' do
+      exceptions = [SocketError, OpenSSL::SSL::SSLError, Errno::ECONNRESET, Errno::ECONNREFUSED, Net::OpenTimeout]
+      exceptions.each do |exception_class|
+        exception = exception_class.new('Exception message')
+
+        WebMock.stub_request(:post, project_hook.url).to_raise(exception)
+        expect(service_instance.execute).to eq([nil, exception.message])
+        expect { service_instance.execute }.not_to raise_error
+      end
+    end
+
+    it 'handles 200 status code' do
+      WebMock.stub_request(:post, project_hook.url).to_return(status: 200, body: 'Success')
+
+      expect(service_instance.execute).to eq([200, 'Success'])
+    end
+
+    it 'handles 2xx status codes' do
+      WebMock.stub_request(:post, project_hook.url).to_return(status: 201, body: 'Success')
+
+      expect(service_instance.execute).to eq([201, 'Success'])
+    end
+
+    context 'execution logging' do
+      let(:hook_log) { project_hook.web_hook_logs.last }
+
+      context 'with success' do
+        before do
+          WebMock.stub_request(:post, project_hook.url).to_return(status: 200, body: 'Success')
+          service_instance.execute
+        end
+
+        it 'log successful execution' do
+          expect(hook_log.trigger).to eq('push_hooks')
+          expect(hook_log.url).to eq(project_hook.url)
+          expect(hook_log.request_headers).to eq(headers)
+          expect(hook_log.response_body).to eq('Success')
+          expect(hook_log.response_status).to eq('200')
+          expect(hook_log.execution_duration).to be > 0
+          expect(hook_log.internal_error_message).to be_nil
+        end
+      end
+
+      context 'with exception' do
+        before do
+          WebMock.stub_request(:post, project_hook.url).to_raise(SocketError.new('Some HTTP Post error'))
+          service_instance.execute
+        end
+
+        it 'log failed execution' do
+          expect(hook_log.trigger).to eq('push_hooks')
+          expect(hook_log.url).to eq(project_hook.url)
+          expect(hook_log.request_headers).to eq(headers)
+          expect(hook_log.response_body).to eq('')
+          expect(hook_log.response_status).to eq('internal error')
+          expect(hook_log.execution_duration).to be > 0
+          expect(hook_log.internal_error_message).to eq('Some HTTP Post error')
+        end
+      end
+
+      context 'should not log ServiceHooks' do
+        let(:service_hook) { create(:service_hook) }
+        let(:service_instance) { WebHookService.new(service_hook, data, 'service_hook') }
+
+        before do
+          WebMock.stub_request(:post, service_hook.url).to_return(status: 200, body: 'Success')
+        end
+
+        it { expect { service_instance.execute }.not_to change(WebHookLog, :count) }
+      end
+    end
+  end
+
+  describe '#async_execute' do
+    let(:system_hook) { create(:system_hook) }
+    
+    it 'enqueue WebHookWorker' do
+      expect(Sidekiq::Client).to receive(:enqueue).with(WebHookWorker, project_hook.id, data, 'push_hooks')
+
+      WebHookService.new(project_hook, data, 'push_hooks').async_execute
+    end
+  end
+end
diff --git a/spec/workers/remove_old_web_hook_logs_worker_spec.rb b/spec/workers/remove_old_web_hook_logs_worker_spec.rb
new file mode 100644
index 00000000000..6d26ba5dfa0
--- /dev/null
+++ b/spec/workers/remove_old_web_hook_logs_worker_spec.rb
@@ -0,0 +1,18 @@
+require 'spec_helper'
+
+describe RemoveOldWebHookLogsWorker do
+  subject { described_class.new }
+
+  describe '#perform' do
+    let!(:week_old_record) { create(:web_hook_log, created_at: Time.now - 1.week) }
+    let!(:three_days_old_record) { create(:web_hook_log, created_at: Time.now - 3.days) }
+    let!(:one_day_old_record) { create(:web_hook_log, created_at: Time.now - 1.day) }
+
+    it 'removes web hook logs older than 2 days' do
+      subject.perform
+
+      expect(WebHookLog.all).to include(one_day_old_record)
+      expect(WebHookLog.all).not_to include(week_old_record, three_days_old_record)
+    end
+  end
+end