discourse/app/jobs/scheduled/poll_mailbox.rb

172 lines
6.6 KiB
Ruby
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require 'net/pop'
require_dependency 'email/receiver'
require_dependency 'email/sender'
require_dependency 'email/message_builder'
module Jobs
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class PollMailbox < Jobs::Scheduled
every SiteSetting.pop3_polling_period_mins.minutes
sidekiq_options retry: false
include Email::BuildEmailHelper
def execute(args)
@args = args
poll_pop3 if should_poll?
end
def should_poll?
return false if Rails.env.development? && ENV["POLL_MAILBOX"].nil?
SiteSetting.pop3_polling_enabled?
end
def process_popmail(popmail)
begin
mail_string = popmail.pop
receiver = Email::Receiver.new(mail_string)
receiver.process!
rescue Email::Receiver::BouncedEmailError => e
log_email_process_failure(mail_string, e)
set_incoming_email_rejection_message(
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receiver.incoming_email,
I18n.t("emails.incoming.errors.bounced_email_error")
)
rescue Email::Receiver::AutoGeneratedEmailReplyError => e
log_email_process_failure(mail_string, e)
set_incoming_email_rejection_message(
receiver.incoming_email,
I18n.t("emails.incoming.errors.auto_generated_email_reply")
)
rescue => e
rejection_message = handle_failure(mail_string, e)
if rejection_message.present? && receiver && (incoming_email = receiver.incoming_email)
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set_incoming_email_rejection_message(incoming_email, rejection_message.body.to_s)
end
end
end
def handle_failure(mail_string, e)
log_email_process_failure(mail_string, e)
message_template = case e
when Email::Receiver::EmptyEmailError then :email_reject_empty
when Email::Receiver::NoBodyDetectedError then :email_reject_empty
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when Email::Receiver::UserNotFoundError then :email_reject_user_not_found
when Email::Receiver::ScreenedEmailError then :email_reject_screened_email
when Email::Receiver::AutoGeneratedEmailError then :email_reject_auto_generated
when Email::Receiver::InactiveUserError then :email_reject_inactive_user
when Email::Receiver::BlockedUserError then :email_reject_blocked_user
when Email::Receiver::BadDestinationAddress then :email_reject_bad_destination_address
when Email::Receiver::StrangersNotAllowedError then :email_reject_strangers_not_allowed
when Email::Receiver::InsufficientTrustLevelError then :email_reject_insufficient_trust_level
when Email::Receiver::ReplyUserNotMatchingError then :email_reject_reply_user_not_matching
when Email::Receiver::TopicNotFoundError then :email_reject_topic_not_found
when Email::Receiver::TopicClosedError then :email_reject_topic_closed
when Email::Receiver::InvalidPost then :email_reject_invalid_post
when ActiveRecord::Rollback then :email_reject_invalid_post
when Email::Receiver::InvalidPostAction then :email_reject_invalid_post_action
when Discourse::InvalidAccess then :email_reject_invalid_access
when RateLimiter::LimitExceeded then :email_reject_rate_limit_specified
end
template_args = {}
client_message = nil
# there might be more information available in the exception
if message_template == :email_reject_invalid_post && e.message.size > 6
message_template = :email_reject_invalid_post_specified
template_args[:post_error] = e.message
end
if message_template == :email_reject_rate_limit_specified
template_args[:rate_limit_description] = e.description
end
if message_template == :email_reject_auto_generated
template_args[:mark_as_reply_to_auto_generated] = true
end
if message_template
# inform the user about the rejection
message = Mail::Message.new(mail_string)
template_args[:former_title] = message.subject
template_args[:destination] = message.to
template_args[:site_name] = SiteSetting.title
client_message = RejectionMailer.send_rejection(message_template, message.from, template_args)
Email::Sender.new(client_message, message_template).send
else
mark_as_errored!
Discourse.handle_job_exception(e, error_context(@args, "Unrecognized error type when processing incoming email", mail: mail_string))
end
client_message
end
POLL_MAILBOX_TIMEOUT_ERROR_KEY = "poll_mailbox_timeout_error_key".freeze
def poll_pop3
pop3 = Net::POP3.new(SiteSetting.pop3_polling_host, SiteSetting.pop3_polling_port)
pop3.enable_ssl if SiteSetting.pop3_polling_ssl
pop3.start(SiteSetting.pop3_polling_username, SiteSetting.pop3_polling_password) do |pop|
pop.delete_all do |p|
process_popmail(p)
end
end
rescue Net::OpenTimeout => e
count = $redis.incr(POLL_MAILBOX_TIMEOUT_ERROR_KEY).to_i
$redis.expire(
POLL_MAILBOX_TIMEOUT_ERROR_KEY,
SiteSetting.pop3_polling_period_mins.minutes * 3
) if count == 1
if count > 3
$redis.del(POLL_MAILBOX_TIMEOUT_ERROR_KEY)
mark_as_errored!
add_admin_dashboard_problem_message('dashboard.poll_pop3_timeout')
Discourse.handle_job_exception(e, error_context(@args, "Connecting to '#{SiteSetting.pop3_polling_host}' for polling emails."))
end
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rescue Net::POPAuthenticationError => e
mark_as_errored!
add_admin_dashboard_problem_message('dashboard.poll_pop3_auth_error')
Discourse.handle_job_exception(e, error_context(@args, "Signing in to poll incoming emails."))
end
POLL_MAILBOX_ERRORS_KEY ||= "poll_mailbox_errors".freeze
def self.errors_in_past_24_hours
$redis.zremrangebyscore(POLL_MAILBOX_ERRORS_KEY, 0, 24.hours.ago.to_i)
$redis.zcard(POLL_MAILBOX_ERRORS_KEY).to_i
end
def mark_as_errored!
now = Time.now.to_i
$redis.zadd(POLL_MAILBOX_ERRORS_KEY, now, now.to_s)
end
private
def set_incoming_email_rejection_message(incoming_email, message)
incoming_email.update_attributes!(rejection_message: message)
end
def log_email_process_failure(mail_string, exception)
if SiteSetting.log_mail_processing_failures
Rails.logger.warn("Email can not be processed: #{exception}\n\n#{mail_string}")
end
end
def add_admin_dashboard_problem_message(i18n_key)
AdminDashboardData.add_problem_message(
i18n_key,
SiteSetting.pop3_polling_period_mins.minutes + 5.minutes
)
end
end
end