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# == Schema Information
# Schema version: 114
#
# Table name: exim_logs
#
# id :integer not null, primary key
# exim_log_done_id :integer
# info_request_id :integer
# order :integer not null
# line :text not null
# created_at :datetime not null
# updated_at :datetime not null
#
# models/exim_log.rb:
# We load log file lines for requests in here, for display in the admin interface.
#
# Copyright (c) 2009 UK Citizens Online Democracy. All rights reserved.
# Email: francis@mysociety.org; WWW: http://www.mysociety.org/
class EximLog < ActiveRecord::Base
belongs_to :info_request
belongs_to :exim_log_done
# Load in exim log file from disk, or update if we already have it
# Assumes files are named with date, rather than cyclically.
# Doesn't do anything if file hasn't been modified since it was last loaded.
def EximLog.load_file(file_name)
file_name_db = file_name
is_gz = false
if file_name.include?(".gz")
is_gz = true
file_name_db = file_name.gsub(".gz", "")
end
modified = File::stat(file_name).mtime
raise "EximLog.load_file: file not found " + file_name if modified.nil?
ActiveRecord::Base.transaction do
# see if we already have it
done = EximLogDone.find_by_filename(file_name_db)
if !done.nil?
if modified.utc == done.last_stat.utc
# already have that, nothing to do
return
end
EximLog.delete_all "exim_log_done_id = " + done.id.to_s
end
if !done
done = EximLogDone.new
done.filename = file_name_db
end
done.last_stat = modified
# scan the file
if is_gz
f = Zlib::GzipReader.open(file_name)
else
f = File.open(file_name, 'r')
end
order = 0
for line in f
order = order + 1
email_domain = Configuration::incoming_email_domain
emails = line.scan(/request-[^\s]+@#{email_domain}/).sort.uniq
for email in emails
info_request = InfoRequest.find_by_incoming_email(email)
if !info_request.nil?
exim_log = EximLog.new
exim_log.info_request = info_request
exim_log.exim_log_done = done
exim_log.line = line
exim_log.order = order
exim_log.save!
end
end
end
# update done structure so we know when we last read this file
done.save!
end
end
# Check that the last day of requests has been sent in Exim and we got the
# lines. Writes any errors to STDERR. This check is really mainly to
# check the envelope from is the request address, as Ruby is quite
# flaky with regard to that, and it is important for anti-spam reasons.
# XXX does this really check that, as the exim log just wouldn't pick
# up at all if the requests weren't sent that way as there would be
# no request- email in it?
def EximLog.check_recent_requests_have_been_sent
# Get all requests sent for from 2 to 10 days ago. The 2 day gap is
# because we load exim log lines via cron at best an hour after they
# are made)
irs = InfoRequest.find(:all, :conditions => [ "created_at < ? and created_at > ? and user_id is not null", Time.now() - 2.day, Time.now() - 10.days ] )
# Go through each request and check it
ok = true
for ir in irs
# Look for line showing request was sent
found = false
for exim_log in ir.exim_logs
test_outgoing = " <= " + ir.incoming_email + " "
if exim_log.line.include?(test_outgoing)
# Check the from value is the same (it always will be, but may as well
# be sure we are parsing the exim line right)
envelope_from = " from <" + ir.incoming_email + "> "
if !exim_log.line.include?(envelope_from)
$stderr.puts("unexpected parsing of exim line: [#{exim_log.line.chomp}]")
else
found = true
end
end
end
if !found
# It's very important the envelope from is set for avoiding spam filter reasons - this
# effectively acts as a check for that.
$stderr.puts("failed to find request sending Exim line for request id " + ir.id.to_s + " " + ir.url_title + " (check envelope from is being set to request address in Ruby, and load-exim-logs crontab is working)") # *** don't comment out this STDERR line, it is the point of the function!
ok = false
end
end
return ok
end
end
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