119 lines
4.8 KiB
Ruby
119 lines
4.8 KiB
Ruby
module Email
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class Processor
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def initialize(mail, retry_on_rate_limit=true)
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@mail = mail
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@retry_on_rate_limit = retry_on_rate_limit
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end
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def self.process!(mail, retry_on_rate_limit=true)
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Email::Processor.new(mail, retry_on_rate_limit).process!
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end
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def process!
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begin
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receiver = Email::Receiver.new(@mail)
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receiver.process!
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rescue RateLimiter::LimitExceeded
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@retry_on_rate_limit ? Jobs.enqueue(:process_email, mail: @mail) : raise
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rescue Email::Receiver::BouncedEmailError => e
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# never reply to bounced emails
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log_email_process_failure(@mail, e)
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set_incoming_email_rejection_message(receiver.incoming_email, I18n.t("emails.incoming.errors.bounced_email_error"))
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rescue => e
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log_email_process_failure(@mail, e)
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incoming_email = receiver.try(:incoming_email)
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rejection_message = handle_failure(@mail, e, incoming_email)
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if rejection_message.present?
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set_incoming_email_rejection_message(incoming_email, rejection_message.body.to_s)
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end
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end
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end
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private
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def handle_failure(mail_string, e, incoming_email)
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message_template = case e
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when Email::Receiver::EmptyEmailError then :email_reject_empty
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when Email::Receiver::NoBodyDetectedError then :email_reject_empty
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when Email::Receiver::UserNotFoundError then :email_reject_user_not_found
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when Email::Receiver::ScreenedEmailError then :email_reject_screened_email
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when Email::Receiver::AutoGeneratedEmailError then :email_reject_auto_generated
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when Email::Receiver::InactiveUserError then :email_reject_inactive_user
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when Email::Receiver::BlockedUserError then :email_reject_blocked_user
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when Email::Receiver::BadDestinationAddress then :email_reject_bad_destination_address
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when Email::Receiver::StrangersNotAllowedError then :email_reject_strangers_not_allowed
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when Email::Receiver::InsufficientTrustLevelError then :email_reject_insufficient_trust_level
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when Email::Receiver::ReplyUserNotMatchingError then :email_reject_reply_user_not_matching
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when Email::Receiver::TopicNotFoundError then :email_reject_topic_not_found
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when Email::Receiver::TopicClosedError then :email_reject_topic_closed
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when Email::Receiver::InvalidPost then :email_reject_invalid_post
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when ActiveRecord::Rollback then :email_reject_invalid_post
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when Email::Receiver::InvalidPostAction then :email_reject_invalid_post_action
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when Discourse::InvalidAccess then :email_reject_invalid_access
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else :email_reject_unrecognized_error
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end
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template_args = {}
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client_message = nil
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# there might be more information available in the exception
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if message_template == :email_reject_invalid_post && e.message.size > 6
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message_template = :email_reject_invalid_post_specified
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template_args[:post_error] = e.message
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end
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if message_template == :email_reject_unrecognized_error
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msg = "Unrecognized error type (#{e.class}: #{e.message}) when processing incoming email"
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msg += "\n\nBacktrace:\n#{e.backtrace.map { |l| " #{l}" }.join("\n")}"
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msg += "\n\nMail:\n#{mail_string}"
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Rails.logger.error(msg)
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end
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if message_template
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# inform the user about the rejection
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message = Mail::Message.new(mail_string)
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template_args[:former_title] = message.subject
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template_args[:destination] = message.to
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template_args[:site_name] = SiteSetting.title
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client_message = RejectionMailer.send_rejection(message_template, message.from, template_args)
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# only send one rejection email per day to the same email address
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if can_send_rejection_email?(message.from, message_template)
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Email::Sender.new(client_message, message_template).send
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end
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end
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client_message
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end
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def can_send_rejection_email?(email, type)
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return true if type == :email_reject_unrecognized_error
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key = "rejection_email:#{email}:#{type}:#{Date.today}"
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if $redis.setnx(key, "1")
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$redis.expire(key, 25.hours)
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true
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else
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false
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end
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end
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def set_incoming_email_rejection_message(incoming_email, message)
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incoming_email.update_attributes!(rejection_message: message)
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end
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def log_email_process_failure(mail_string, exception)
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if SiteSetting.log_mail_processing_failures
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Rails.logger.warn("Email can not be processed: #{exception}\n\n#{mail_string}")
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end
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end
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end
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end
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