summaryrefslogtreecommitdiff
path: root/lib/feed2imap/feed2imap.rb
blob: 2f62a809cdb4a93c8ebcbf42e9fd4d20ffe7523f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
=begin
Feed2Imap - RSS/Atom Aggregator uploading to an IMAP Server
Copyright (c) 2005 Lucas Nussbaum <lucas@lucas-nussbaum.net>

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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
=end

# Feed2Imap version
F2I_VERSION = '0.9'

require 'feed2imap/config'
require 'feed2imap/cache'
require 'feed2imap/httpfetcher'
require 'logger'
require 'thread'
require 'feedparser'
require 'feed2imap/itemtomail'
require 'open3'

class Feed2Imap
  def Feed2Imap.version
    return F2I_VERSION
  end

  def initialize(verbose, cacherebuild, configfile)
    @logger = Logger::new(STDOUT)
    if verbose == :debug
      @logger.level = Logger::DEBUG
      require 'pp'
    elsif verbose == true
      @logger.level = Logger::INFO
    else
      @logger.level = Logger::WARN
    end
    @logger.info("Feed2Imap V.#{F2I_VERSION} started")
    # reading config
    @logger.info('Reading configuration file ...')
    if not File::exist?(configfile)
      @logger.fatal("Configuration file #{configfile} not found.")
      exit(1)
    end
    if (File::stat(configfile).mode & 044) != 0
      @logger.warn("Configuration file is readable by other users. It " +
        "probably contains your password.")
    end
    begin
      File::open(configfile) { 
        |f| @config = F2IConfig::new(f)
      }
    rescue
      @logger.fatal("Error while reading configuration file, exiting: #{$!}")
      exit(1)
    end
    if @logger.level == Logger::DEBUG
      @logger.debug("Configuration read:")
      pp(@config)
    end

    # init cache
    @logger.info('Initializing cache ...')
    @cache = ItemCache::new(@config.updateddebug)
    if not File::exist?(@config.cache + '.lock')
      f = File::new(@config.cache + '.lock', 'w')
      f.close
    end
    if File::new(@config.cache + '.lock', 'w').flock(File::LOCK_EX | File::LOCK_NB) == false
      @logger.fatal("Another instance of feed2imap is already locking the cache file")
      exit(1)
    end
    if not File::exist?(@config.cache) 
      @logger.warn("Cache file #{@config.cache} not found, using a new one")
    else
      File::open(@config.cache) do |f|
        @cache.load(f)
      end
    end

    # connecting all IMAP accounts
    @logger.info('Connecting to IMAP accounts ...')
    @config.imap_accounts.each_value do |ac|
      begin
        ac.connect
      rescue
        @logger.fatal("Error while connecting to #{ac}, exiting: #{$!}")
        exit(1)
      end
    end

    # check that IMAP folders exist
    @logger.info("Checking IMAP folders ...")
    @config.feeds.each do |f|
      begin
        f.imapaccount.create_folder(f.folder) if not f.imapaccount.folder_exist?(f.folder)
      rescue
        @logger.fatal("Error while creating IMAP folder #{f.folder}: #{$!}")
        exit(1)
      end
    end
    # for each feed, fetch, upload to IMAP and cache
    @logger.info("Fetching and filtering feeds ...")
    ths = []
    mutex = Mutex::new
    @config.feeds.each do |f|
      ths << Thread::new(f) do |feed|
        begin
          mutex.lock
          lastcheck = @cache.get_last_check(feed.name) 
          if feed.needfetch(lastcheck)
            mutex.unlock
            if feed.url
              s = HTTPFetcher::fetch(feed.url, @cache.get_last_check(feed.name))
            elsif feed.execurl
              s = %x{#{feed.execurl}}
            else
              @logger.warn("No way to fetch feed #{feed.name} !")
            end
            if feed.filter
              Open3::popen3(feed.filter) do |stdin, stdout|
                stdin.puts s
                stdin.close
                s = stdout.read
              end
            end
            mutex.lock
            feed.body = s
            @cache.set_last_check(feed.name, Time::now)
          else
            @logger.debug("Feed #{feed.name} doesn't need to be checked again for now.")
          end
          mutex.unlock
          # dump if requested
          if @config.dumpdir
            mutex.synchronize do
              if feed.body
                fname = @config.dumpdir + '/' + feed.name + '-' + Time::now.xmlschema
                File::open(fname, 'w') { |file| file.puts feed.body }
              end
            end
          end
        rescue Timeout::Error
          mutex.synchronize do
            n = @cache.fetch_failed(feed.name)
            m = "Timeout::Error while fetching #{feed.url}: #{$!} (failed #{n} times)"
            if n > @config.max_failures
              @logger.fatal(m)
            else
              @logger.info(m)
            end
          end
        rescue
          mutex.synchronize do
            n = @cache.fetch_failed(feed.name)
            m = "Error while fetching #{feed.url}: #{$!} (failed #{n} times)"
            if n > @config.max_failures
              @logger.fatal(m)
            else
              @logger.info(m)
            end
          end
        end
      end
    end
    ths.each { |t| t.join }
    @logger.info("Parsing and uploading ...")
    @config.feeds.each do |f|
      if f.body.nil? # means 304
        @logger.debug("Feed #{f.name} did not change.")
        next
      end
      begin
        feed = FeedParser::Feed::new(f.body)
      rescue Exception => e
        @logger.fatal("Error while parsing #{f.name}: #{e}")
        next
      end
      begin
        newitems, updateditems = @cache.get_new_items(f.name, feed.items, f.always_new, f.ignore_hash)
      rescue
        @logger.fatal("Exception caught when selecting new items for #{f.name}: #{$!}")
        puts $!.backtrace
        next
      end
      @logger.info("#{f.name}: #{newitems.length} new items, #{updateditems.length} updated items.") if newitems.length > 0 or updateditems.length > 0 or @logger.level == Logger::DEBUG
      begin
        if !cacherebuild
          updateditems.each do |i|
            email = item_to_mail(i, i.cacheditem.index, true, f.name)
            f.imapaccount.updatemail(f.folder, email,
                                     i.cacheditem.index, i.date || Time::new)
          end
          newitems.each do |i|
            email = item_to_mail(i, i.cacheditem.index, false, f.name)
            f.imapaccount.putmail(f.folder, email, i.date || Time::new)
          end
        end
      rescue
        @logger.fatal("Exception caught while uploading mail to #{f.folder}: #{$!}")
        puts $!.backtrace
        next
      end
      begin
        @cache.commit_cache(f.name)
      rescue
        @logger.fatal("Exception caught while updating cache for #{f.name}: #{$!}")
        next
      end
    end
    @logger.info("Finished. Saving cache ...")
    begin
      File::open(@config.cache, 'w') { |f| @cache.save(f) }
    rescue
      @logger.fatal("Exception caught while writing cache to #{@config.cache}: #{$!}")
    end
    @logger.info("Closing IMAP connections ...")
    @config.imap_accounts.each_value do |ac|
      begin
        ac.disconnect
      rescue
        # servers tend to cause an exception to be raised here, hence the INFO level.
        @logger.info("Exception caught while closing connection to #{ac.to_s}: #{$!}")
      end
    end
  end
end