discourse/app/jobs/regular/emit_web_hook_event.rb

181 lines
5.2 KiB
Ruby

# frozen_string_literal: true
require 'excon'
module Jobs
class EmitWebHookEvent < ::Jobs::Base
PING_EVENT = 'ping'
MAX_RETRY_COUNT = 4
RETRY_BACKOFF = 5
def execute(args)
@arguments = args
@retry_count = args[:retry_count] || 0
@web_hook = WebHook.find_by(id: @arguments[:web_hook_id])
validate_arguments!
return if @web_hook.blank? # Web Hook was deleted
unless ping_event?(@arguments[:event_type])
validate_argument!(:payload)
return if webhook_inactive?
return if group_webhook_invalid?
return if category_webhook_invalid?
return if tag_webhook_invalid?
end
send_webhook!
end
private
def validate_arguments!
validate_argument!(:web_hook_id)
validate_argument!(:event_type)
end
def validate_argument!(key)
raise Discourse::InvalidParameters.new(key) unless @arguments[key].present?
end
def send_webhook!
uri = URI(@web_hook.payload_url.strip)
conn = Excon.new(uri.to_s, ssl_verify_peer: @web_hook.verify_certificate, retry_limit: 0)
web_hook_body = build_webhook_body
web_hook_event = create_webhook_event(web_hook_body)
web_hook_headers = build_webhook_headers(uri, web_hook_body, web_hook_event)
web_hook_response = nil
begin
now = Time.zone.now
web_hook_response = conn.post(headers: web_hook_headers, body: web_hook_body)
web_hook_event.update!(
headers: MultiJson.dump(web_hook_headers),
status: web_hook_response.status,
response_headers: MultiJson.dump(web_hook_response.headers),
response_body: web_hook_response.body,
duration: ((Time.zone.now - now) * 1000).to_i
)
rescue => e
web_hook_event.update!(
headers: MultiJson.dump(web_hook_headers),
status: -1,
response_headers: MultiJson.dump(error: e),
duration: ((Time.zone.now - now) * 1000).to_i
)
end
publish_webhook_event(web_hook_event)
process_webhook_response(web_hook_response)
end
def process_webhook_response(web_hook_response)
return if web_hook_response&.status.blank?
case web_hook_response.status
when 200..299
when 404, 410
if @retry_count >= MAX_RETRY_COUNT
@web_hook.update!(active: false)
StaffActionLogger
.new(Discourse.system_user)
.log_web_hook_deactivate(@web_hook, web_hook_response.status)
end
else
retry_web_hook
end
end
def retry_web_hook
if SiteSetting.retry_web_hook_events?
@retry_count += 1
return if @retry_count > MAX_RETRY_COUNT
delay = RETRY_BACKOFF**(@retry_count - 1)
@arguments[:retry_count] = @retry_count
::Jobs.enqueue_in(delay.minutes, :emit_web_hook_event, @arguments)
end
end
def publish_webhook_event(web_hook_event)
MessageBus.publish("/web_hook_events/#{@web_hook.id}", {
web_hook_event_id: web_hook_event.id,
event_type: @arguments[:event_type]
}, group_ids: [Group::AUTO_GROUPS[:staff]])
end
def ping_event?(event_type)
PING_EVENT == event_type
end
def webhook_inactive?
!@web_hook.active?
end
def group_webhook_invalid?
@web_hook.group_ids.present? && (@arguments[:group_ids].blank? ||
(@web_hook.group_ids & @arguments[:group_ids]).blank?)
end
def category_webhook_invalid?
@web_hook.category_ids.present? && (!@arguments[:category_id].present? ||
!@web_hook.category_ids.include?(@arguments[:category_id]))
end
def tag_webhook_invalid?
@web_hook.tag_ids.present? && (@arguments[:tag_ids].blank? ||
(@web_hook.tag_ids & @arguments[:tag_ids]).blank?)
end
def build_webhook_headers(uri, web_hook_body, web_hook_event)
content_type =
case @web_hook.content_type
when WebHook.content_types['application/x-www-form-urlencoded']
'application/x-www-form-urlencoded'
else
'application/json'
end
headers = {
'Accept' => '*/*',
'Connection' => 'close',
'Content-Length' => web_hook_body.bytesize,
'Content-Type' => content_type,
'Host' => uri.host,
'User-Agent' => "Discourse/#{Discourse::VERSION::STRING}",
'X-Discourse-Instance' => Discourse.base_url,
'X-Discourse-Event-Id' => web_hook_event.id,
'X-Discourse-Event-Type' => @arguments[:event_type]
}
headers['X-Discourse-Event'] = @arguments[:event_name] if @arguments[:event_name].present?
if @web_hook.secret.present?
headers['X-Discourse-Event-Signature'] = "sha256=#{OpenSSL::HMAC.hexdigest("sha256", @web_hook.secret, web_hook_body)}"
end
headers
end
def build_webhook_body
body = {}
if ping_event?(@arguments[:event_type])
body['ping'] = "OK"
else
body[@arguments[:event_type]] = JSON.parse(@arguments[:payload])
end
new_body = Plugin::Filter.apply(:after_build_web_hook_body, self, body)
MultiJson.dump(new_body)
end
def create_webhook_event(web_hook_body)
WebHookEvent.create!(web_hook: @web_hook, payload: web_hook_body)
end
end
end