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|
=begin
Feed2Imap - RSS/Atom Aggregator uploading to an IMAP Server, or local Maildir
Copyright (c) 2009 Andreas Rottmann
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
=end
require 'uri'
require 'fileutils'
require 'fcntl'
require 'mail'
require 'socket'
class MaildirAccount
MYHOSTNAME = Socket.gethostname
@@seq_num = 0
attr_reader :uri
def putmail(folder, mail, date = Time::now)
store_message(folder_dir(folder), date, nil) do |f|
f.puts(mail)
end
end
def updatemail(folder, mail, idx, date = Time::now, reupload_if_updated = true)
dir = folder_dir(folder)
guarantee_maildir(dir)
mail_files = find_mails(dir, idx)
flags = nil
if mail_files.length > 0
# get the info from the first result and delete everything
info = maildir_file_info(mail_files[0])
mail_files.each { |f| File.delete(File.join(dir, f)) }
elsif not reupload_if_updated
# mail not present, and we don't want to re-upload it
return
end
store_message(dir, date, info) { |f| f.puts(mail) }
end
def to_s
uri.to_s
end
def cleanup(folder, dryrun = false)
dir = folder_dir(folder)
puts "-- Considering #{dir}:"
guarantee_maildir(dir)
del_count = 0
recent_time = Time.now() - (3 * 24 * 60 * 60) # 3 days
Dir[File.join(dir, 'cur', '*')].each do |fn|
flags = maildir_file_info_flags(fn)
# don't consider not-seen, flagged, or recent messages
mtime = File.mtime(fn)
next if (not flags.index('S') or
flags.index('F') or
mtime > recent_time)
mail = Mail.read(fn)
subject = mail.subject
if dryrun
puts "To remove: #{subject} #{mtime}"
else
puts "Removing: #{subject} #{mtime}"
File.delete(fn)
end
del_count += 1
end
puts "-- Deleted #{del_count} messages"
return del_count
end
private
def folder_dir(folder)
return File.join('/', folder)
end
def store_message(dir, date, info, &block)
guarantee_maildir(dir)
stored = false
Dir.chdir(dir) do |d|
timer = 30
fd = nil
while timer >= 0
new_fn = new_maildir_basefn(date)
tmp_path = File.join(dir, 'tmp', new_fn)
new_path = File.join(dir, 'new', new_fn)
begin
fd = IO::sysopen(tmp_path,
Fcntl::O_WRONLY | Fcntl::O_EXCL | Fcntl::O_CREAT)
break
rescue Errno::EEXIST
sleep 2
timer -= 2
next
end
end
if fd
begin
f = IO.open(fd)
# provide a writable interface for the caller
yield f
f.fsync
File.link tmp_path, new_path
stored = true
ensure
File.unlink tmp_path if File.exists? tmp_path
end
end
if stored and info
cur_path = File.join(dir, 'cur', new_fn + ':' + info)
File.rename(new_path, cur_path)
end
end # Dir.chdir
return stored
end
def find_mails(dir, idx)
dir_paths = []
['cur', 'new'].each do |d|
subdir = File.join(dir, d)
raise "#{subdir} not a directory" unless File.directory? subdir
Dir[File.join(subdir, '*')].each do |fn|
mail = Mail.read(fn)
cache_index = mail.message_id
if cache_index
if idx.start_with? '<' and idx.end_with? '>'
cache_index = "<#{cache_index}>"
end
if cache_index == idx
dir_paths.push(File.join(d, File.basename(fn)))
end
end
end
end
return dir_paths
end
def guarantee_maildir(dir)
# Ensure maildir-folderness
['new', 'cur', 'tmp'].each do |d|
FileUtils.mkdir_p(File.join(dir, d))
end
end
def maildir_file_info(file)
basename = File.basename(file)
colon = basename.rindex(':')
return (colon and basename[colon + 1 .. -1])
end
# Re-written and no longer shamelessly taken from
# http://gitorious.org/sup/mainline/blobs/master/lib/sup/maildir.rb
def new_maildir_basefn(date)
fn = "#{date.to_i.to_s}.#{@@seq_num.to_s}.#{MYHOSTNAME}"
@@seq_num += 1
fn
end
def maildir_file_info_flags(fn)
parts = fn.split(',')
if parts.size == 1
''
else
parts.last
end
end
end
|
