module Redwood
class IMAP < Source
+ SCAN_INTERVAL = 60 # seconds
+
attr_reader_cloned :labels
attr_accessor :username, :password
@imap = nil
@imap_ids = {}
@ids = []
+ @last_scan = nil
@labels = [:unread]
@labels << :inbox unless archived?
@labels << mailbox.intern unless mailbox =~ /inbox/i
@mutex = Mutex.new
+ end
- @recover_msg = "It is likely that messages have been deleted from this IMAP mailbox. Please run sup-import --rebuild #{to_s} to correct this problem."
+ def host; @parsed_uri.host; end
+ def port; @parsed_uri.port || (ssl? ? 993 : 143); end
+ def mailbox
+ x = @parsed_uri.path[1..-1]
+ x.nil? || x.empty? ? 'INBOX' : x
end
+ def ssl?; @parsed_uri.scheme == 'imaps' end
- def say s
- @say_id = BufferManager.say s, @say_id if BufferManager.instantiated?
- Redwood::log s
+ def load_header id
+ MBox::read_header StringIO.new(raw_header(id))
end
- def shutup
- BufferManager.clear @say_id if BufferManager.instantiated?
- @say_id = nil
+
+ def load_message id
+ RMail::Parser.read raw_full_message(id)
+ end
+
+ def raw_header id
+ @mutex.synchronize do
+ connect
+ header, flags = get_imap_fields id, 'RFC822.HEADER', 'FLAGS'
+ header = "Status: RO\n" + header if flags.include? :Seen # fake an mbox-style read header
+ header.gsub(/\r\n/, "\n")
+ end
+ end
+
+ def raw_full_message id
+ @mutex.synchronize do
+ connect
+ get_imap_fields(id, 'RFC822').first.gsub(/\r\n/, "\n")
+ end
end
- private :say, :shutup
def connect
return false if broken?
return true if @imap
+ say "Connecting to IMAP server #{host}:#{port}..."
+
## ok, this is FUCKING ANNOYING.
##
## what imap.rb likes to do is, if an exception occurs, catch it
##
## FUCK!!!!!!!!!
- say "Connecting to IMAP server #{host}:#{port}..."
-
+ exception = nil
Redwood::reporting_thread do
begin
#raise Net::IMAP::ByeResponseError, "simulated imap failure"
@imap = Net::IMAP.new host, port, ssl?
say "Logging in..."
@imap.authenticate 'LOGIN', @username, @password
- say "Sizing mailbox..."
- @imap.examine mailbox
- last_id = @imap.responses["EXISTS"][-1]
-
- say "Reading headers (because IMAP sucks)..."
- values = @imap.fetch(1 .. last_id, ['RFC822.SIZE', 'INTERNALDATE'])
+ scan_mailbox
say "Successfully connected to #{@parsed_uri}."
-
- values.each do |v|
- id = make_id v
- @ids << id
- @imap_ids[id] = v.seqno
- end
rescue SocketError, Net::IMAP::Error, SourceError => e
- self.broken_msg = e.message.chomp # fucking chomp! fuck!!!
- @imap = nil
- msg = "error connecting to IMAP server: #{self.broken_msg}"
- Redwood::log msg
- BufferManager.flash msg
+ exception = e
ensure
shutup
end
end.join
- !!@imap
+ die_from exception, :while => "connecting" if exception
end
- private :connect
- ## build a fake unique id
- def make_id imap_stuff
- # use 7 digits for the size. why 7? seems nice.
- msize, mdate = imap_stuff.attr['RFC822.SIZE'] % 10000000, Time.parse(imap_stuff.attr["INTERNALDATE"])
- sprintf("%d%07d", mdate.to_i, msize).to_i
- end
- private :make_id
+ def each
+ @mutex.synchronize { connect or raise SourceError, broken_msg }
- def host; @parsed_uri.host; end
- def port; @parsed_uri.port || (ssl? ? 993 : 143); end
- def mailbox
- x = @parsed_uri.path[1..-1]
- x.nil? || x.empty? ? 'INBOX' : x
- end
- def ssl?; @parsed_uri.scheme == 'imaps' end
+ start = @ids.index(cur_offset || start_offset) or die_from "Unknown message id #{cur_offset || start_offset}.", :suggest_rebuild => true # couldn't find the most recent email
- def load_header id
- MBox::read_header StringIO.new(raw_header(id))
+ start.upto(@ids.length - 1) do |i|
+ id = @ids[i]
+ self.cur_offset = id
+ yield id, labels
+ end
end
- def load_message id
- RMail::Parser.read raw_full_message(id)
+ def start_offset
+ @mutex.synchronize { connect }
+ @ids.first
end
- def raw_header id
+ def end_offset
@mutex.synchronize do
- connect or raise SourceError, broken_msg
- header, flags = get_imap_fields id, 'RFC822.HEADER', 'FLAGS'
- header = "Status: RO\n" + header if flags.include? :Seen # fake an mbox-style read header
- header.gsub(/\r\n/, "\n")
+ begin
+ connect
+ scan_mailbox
+ rescue SocketError, Net::IMAP::Error, SourceError => e
+ die_from e, :while => "scanning mailbox"
+ end
end
+ @ids.last
end
- def raw_full_message id
- @mutex.synchronize do
- connect or raise SourceError, broken_msg
- get_imap_fields(id, 'RFC822').first.gsub(/\r\n/, "\n")
+ def pct_done; 100.0 * (@ids.index(cur_offset) || 0).to_f / (@ids.length - 1).to_f; end
+
+private
+
+ def say s
+ @say_id = BufferManager.say s, @say_id if BufferManager.instantiated?
+ Redwood::log s
+ end
+
+ def shutup
+ BufferManager.clear @say_id if BufferManager.instantiated?
+ @say_id = nil
+ end
+
+ def scan_mailbox
+ return if @last_scan && (Time.now - @last_scan) < SCAN_INTERVAL
+
+ @imap.examine mailbox
+ last_id = @imap.responses["EXISTS"][-1]
+ return if last_id == @ids.length + 1
+ Redwood::log "fetching IMAP headers #{(@ids.length + 1) .. last_id}"
+ File.open("asdf.txt", "w") { |f| f.puts "fetching IMAP headers #{(@ids.length + 1) .. last_id}" }
+ values = @imap.fetch((@ids.length + 1) .. last_id, ['RFC822.SIZE', 'INTERNALDATE'])
+ values.each do |v|
+ id = make_id v
+ @ids << id
+ @imap_ids[id] = v.seqno
end
+ @last_scan = Time.now
+ end
+
+ def die_from e, opts={}
+ @imap = nil
+
+ message =
+ case e
+ when Exception
+ "Error while #{opts[:while]}: #{e.message.chomp}."
+ when String
+ e
+ end
+
+ message += " It is likely that messages have been deleted from this IMAP mailbox. Please run sup-import --rebuild #{to_s} to correct this problem." if opts[:suggest_rebuild]
+
+ self.broken_msg = message
+ Redwood::log message
+ BufferManager.flash message
+ raise SourceError, message
+ end
+
+ ## build a fake unique id
+ def make_id imap_stuff
+ # use 7 digits for the size. why 7? seems nice.
+ msize, mdate = imap_stuff.attr['RFC822.SIZE'] % 10000000, Time.parse(imap_stuff.attr["INTERNALDATE"])
+ sprintf("%d%07d", mdate.to_i, msize).to_i
end
def get_imap_fields id, *fields
retries = 0
f = nil
- imap_id = @imap_ids[id] or raise SourceError, "Unknown message id #{id}. #@recover_msg"
+ imap_id = @imap_ids[id] or die_from "Unknown message id #{id}.", :suggest_rebuild => true
begin
f = @imap.fetch imap_id, (fields + ['RFC822.SIZE', 'INTERNALDATE']).uniq
got_id = make_id f[0]
- raise SourceError, "IMAP message mismatch: requested #{id}, got #{got_id}. #@recover_msg" unless got_id == id
- rescue Net::IMAP::Error => e
- raise SourceError, e.message
+ die_from "IMAP message mismatch: requested #{id}, got #{got_id}.", :suggest_rebuild => true unless id == got_id
+ rescue SocketError, Net::IMAP::Error
+ die_from e, :while => "communicating with IMAP server"
rescue Errno::EPIPE
if (retries += 1) <= 3
@imap = nil
retry
end
end
- raise SourceError, "null IMAP field '#{field}' for message with id #{id} imap id #{imap_id}" if f.nil?
+ die_from "Null IMAP field '#{field}' for message with id #{id} imap id #{imap_id}." if f.nil?
fields.map { |field| f[0].attr[field] }
end
- private :get_imap_fields
-
- def each
- @mutex.synchronize { connect or raise SourceError, broken_msg }
-
- start = @ids.index(cur_offset || start_offset)
- if start.nil? # couldn't find the most recent email
- self.broken_msg = "Unknown message id #{cur_offset || start_offset}. #@recover_msg"
- raise SourceError, broken_msg
- end
- start.upto(@ids.length - 1) do |i|
- id = @ids[i]
- self.cur_offset = id
- yield id, labels
- end
- end
-
- def start_offset
- @mutex.synchronize { connect or raise SourceError, broken_msg }
- @ids.first
- end
-
- def end_offset
- @mutex.synchronize { connect or raise SourceError, broken_msg }
- @ids.last
- end
-
- def pct_done; 100.0 * (@ids.index(cur_offset) || 0).to_f / (@ids.length - 1).to_f; end
end
Redwood::register_yaml(IMAP, %w(uri username password cur_offset usual archived id))
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