## fucking imap fucking sucks. what the FUCK kind of committee of
## dunces designed this shit.
-
+##
## imap talks about 'unique ids' for messages, to be used for
## cross-session identification. great---just what sup needs! except
## it turns out the uids can be invalidated every time the
## does. thus the so-called uids are absolutely useless and imap
## provides no cross-session way of uniquely identifying a
## message. but thanks for the "strong recommendation", guys!
-
+##
## so right now i'm using the 'internal date' and the size of each
## message to uniquely identify it, and i scan over the entire mailbox
## each time i open it to map those things to message ids. that can be
## slow for large mailboxes, and we'll just have to hope that there
## are no collisions. ho ho! a perfectly reasonable solution!
-
+##
+## and here's another thing. check out RFC2060 2.2.2 paragraph 5:
+##
+## A client MUST be prepared to accept any server response at all times.
+## This includes server data that was not requested.
+##
+## yeah. that totally makes a lot of sense. and once again, the idiocy
+## of the spec actually happens in practice. you'll request flags for
+## one message, and get it interspersed with a random bunch of flags
+## for some other messages, including a different set of flags for the
+## same message! totally ok by the imap spec. totally retarded by any
+## other metric.
+##
## fuck you, imap committee. you managed to design something nearly as
## shitty as mbox but goddamn THIRTY YEARS LATER.
module Redwood
SCAN_INTERVAL = 60 # seconds
## upon these errors we'll try to rereconnect a few times
- RECOVERABLE_ERRORS = [ Errno::EPIPE, Errno::ETIMEDOUT ]
+ RECOVERABLE_ERRORS = [ Errno::EPIPE, Errno::ETIMEDOUT, OpenSSL::SSL::SSLError ]
attr_accessor :username, :password
+ yaml_properties :uri, :username, :password, :cur_offset, :usual,
+ :archived, :id, :labels
- def initialize uri, username, password, last_idate=nil, usual=true, archived=false, id=nil
+ def initialize uri, username, password, last_idate=nil, usual=true, archived=false, id=nil, labels=[]
raise ArgumentError, "username and password must be specified" unless username && password
raise ArgumentError, "not an imap uri" unless uri =~ %r!imaps?://!
@imap_ids = {}
@ids = []
@last_scan = nil
- @labels = [:unread]
- @labels << mailbox.intern unless mailbox =~ /inbox/i
+ @labels = (labels || []).freeze
+ @say_id = nil
@mutex = Mutex.new
end
+ def self.suggest_labels_for path
+ if path =~ /inbox/i
+ [path.intern]
+ else
+ []
+ end
+ end
+
def host; @parsed_uri.host; end
def port; @parsed_uri.port || (ssl? ? 993 : 143); end
def mailbox
end
def ssl?; @parsed_uri.scheme == 'imaps' end
- def check; scan_mailbox; end
+ def check
+ ids =
+ @mutex.synchronize do
+ unsynchronized_scan_mailbox
+ @ids
+ end
+
+ start = ids.index(cur_offset || start_offset) or raise OutOfSyncSourceError, "Unknown message id #{cur_offset || start_offset}."
+ end
## is this necessary? TODO: remove maybe
def == o; o.is_a?(IMAP) && o.uri == self.uri && o.username == self.username; end
def raw_header id
unsynchronized_scan_mailbox
header, flags = get_imap_fields id, 'RFC822.HEADER', 'FLAGS'
+ ## very bad. this is very very bad. very bad bad bad.
header = header + "Status: RO\n" if flags.include? :Seen # fake an mbox-style read header # TODO: improve source-marked-as-read reporting system
header.gsub(/\r\n/, "\n")
end
return if last_id == @ids.length
- Redwood::log "fetching IMAP headers #{(@ids.length + 1) .. last_id}"
- values = safely { @imap.fetch((@ids.length + 1) .. last_id, ['RFC822.SIZE', 'INTERNALDATE']) }
- values.each do |v|
+ range = (@ids.length + 1) .. last_id
+ Redwood::log "fetching IMAP headers #{range}"
+ fetch(range, ['RFC822.SIZE', 'INTERNALDATE']).each do |v|
id = make_id v
@ids << id
@imap_ids[id] = v.seqno
start.upto(ids.length - 1) do |i|
id = ids[i]
self.cur_offset = id
- yield id, @labels.clone
+ yield id, @labels
end
end
private
+ def fetch ids, fields
+ results = safely { @imap.fetch ids, fields }
+ good_results =
+ if ids.respond_to? :member?
+ results.find_all { |r| ids.member?(r.seqno) && fields.all? { |f| r.attr.member?(f) } }
+ else
+ results.find_all { |r| ids == r.seqno && fields.all? { |f| r.attr.member?(f) } }
+ end
+
+ if good_results.empty?
+ raise FatalSourceError, "no IMAP response for #{ids} containing all fields #{fields.join(', ')} (got #{results.size} results)"
+ elsif good_results.size < results.size
+ Redwood::log "Your IMAP server sucks. It sent #{results.size} results for a request for #{good_results.size} messages. What are you using, Binc?"
+ end
+
+ good_results
+ end
+
def unsafe_connect
say "Connecting to IMAP server #{host}:#{port}..."
def make_id imap_stuff
# use 7 digits for the size. why 7? seems nice.
+ %w(RFC822.SIZE INTERNALDATE).each do |w|
+ raise FatalSourceError, "requested data not in IMAP response: #{w}" unless imap_stuff.attr[w]
+ end
+
msize, mdate = imap_stuff.attr['RFC822.SIZE'] % 10000000, Time.parse(imap_stuff.attr["INTERNALDATE"])
sprintf("%d%07d", mdate.to_i, msize).to_i
end
imap_id = @imap_ids[id] or raise OutOfSyncSourceError, "Unknown message id #{id}"
retried = false
- results = safely { @imap.fetch imap_id, (fields + ['RFC822.SIZE', 'INTERNALDATE']).uniq }.first
- got_id = make_id results
+ result = fetch(imap_id, (fields + ['RFC822.SIZE', 'INTERNALDATE']).uniq).first
+ got_id = make_id result
raise OutOfSyncSourceError, "IMAP message mismatch: requested #{id}, got #{got_id}." unless got_id == id
- fields.map { |f| results.attr[f] }
+ fields.map { |f| result.attr[f] or raise FatalSourceError, "empty response from IMAP server: #{f}" }
end
## execute a block, connected if unconnected, re-connected up to 3
begin
unsafe_connect unless @imap
yield
- rescue *RECOVERABLE_ERRORS
+ rescue *RECOVERABLE_ERRORS => e
if (retries += 1) <= 3
@imap = nil
+ Redwood::log "got #{e.class.name}: #{e.message.inspect}"
+ sleep 2
retry
end
raise
end
- rescue Net, SocketError, Net::IMAP::Error, SystemCallError => e
- raise FatalSourceError, "While communicating with IMAP server: #{e.message}"
+ rescue SocketError, Net::IMAP::Error, SystemCallError, IOError, OpenSSL::SSL::SSLError => e
+ raise FatalSourceError, "While communicating with IMAP server (type #{e.class.name}): #{e.message.inspect}"
end
end
end
-Redwood::register_yaml(IMAP, %w(uri username password cur_offset usual archived id))
-
end
projects / sup / blobdiff