mirror of
https://github.com/codeninjasllc/discourse.git
synced 2024-11-27 17:46:05 -05:00
77 lines
2.3 KiB
Ruby
77 lines
2.3 KiB
Ruby
require "openssl"
|
|
|
|
class WebhooksController < ActionController::Base
|
|
|
|
def mailgun
|
|
# can't verify data without an API key
|
|
return mailgun_failure if SiteSetting.mailgun_api_key.blank?
|
|
|
|
# token is a random string of 50 characters
|
|
token = params.delete("token")
|
|
return mailgun_failure if token.blank? || token.size != 50
|
|
|
|
# prevent replay attack
|
|
key = "mailgun_token_#{token}"
|
|
return mailgun_failure unless $redis.setnx(key, 1)
|
|
$redis.expire(key, 8.hours)
|
|
|
|
# ensure timestamp isn't too far from current time
|
|
timestamp = params.delete("timestamp")
|
|
return mailgun_failure if (Time.at(timestamp.to_i) - Time.now).abs > 1.hour.to_i
|
|
|
|
# check the signature
|
|
return mailgun_failure unless mailgun_verify(timestamp, token, params["signature"])
|
|
|
|
handled = false
|
|
event = params.delete("event")
|
|
|
|
# only handle soft bounces, because hard bounces are also handled
|
|
# by the "dropped" event and we don't want to increase bounce score twice
|
|
# for the same message
|
|
if event == "bounced".freeze && params["error"]["4."]
|
|
handled = mailgun_process(params, Email::Receiver::SOFT_BOUNCE_SCORE)
|
|
elsif event == "dropped".freeze
|
|
handled = mailgun_process(params, Email::Receiver::HARD_BOUNCE_SCORE)
|
|
end
|
|
|
|
handled ? mailgun_success : mailgun_failure
|
|
end
|
|
|
|
private
|
|
|
|
def mailgun_failure
|
|
render nothing: true, status: 406
|
|
end
|
|
|
|
def mailgun_success
|
|
render nothing: true, status: 200
|
|
end
|
|
|
|
def mailgun_verify(timestamp, token, signature)
|
|
digest = OpenSSL::Digest::SHA256.new
|
|
data = "#{timestamp}#{token}"
|
|
signature == OpenSSL::HMAC.hexdigest(digest, SiteSetting.mailgun_api_key, data)
|
|
end
|
|
|
|
def mailgun_process(params, bounce_score)
|
|
return false if params["message-headers"].blank?
|
|
|
|
return_path_header = params["message-headers"].first { |h| h[0] == "Return-Path".freeze }
|
|
return false if return_path_header.blank?
|
|
|
|
return_path = return_path_header[1]
|
|
return false if return_path.blank?
|
|
|
|
bounce_key = return_path[/\+verp-(\h{32})@/, 1]
|
|
return false if bounce_key.blank?
|
|
|
|
email_log = EmailLog.find_by(bounce_key: bounce_key)
|
|
return false if email_log.nil?
|
|
|
|
email_log.update_columns(bounced: true)
|
|
Email::Receiver.update_bounce_score(email_log.user.email, bounce_score)
|
|
|
|
true
|
|
end
|
|
|
|
end
|