şunun yansıması
https://github.com/rspamd/rspamd.git
eşitlendi 2024-08-19 02:10:31 +02:00
131 satır
3.5 KiB
Lua
131 satır
3.5 KiB
Lua
--[[
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Copyright (c) 2011-2015, Vsevolod Stakhov <vsevolod@highsecure.ru>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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]]--
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-- Detect language of message and selects appropriate statfiles for it
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local fun = require "fun"
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-- Common labels for specific statfiles
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local many_recipients_label = 'many recipients'
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local undisclosed_recipients_label = 'undisclosed recipients'
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local list_label = 'maillist'
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local long_subject_label = 'long subject'
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-- Get specific statfiles set based on message rules
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local function get_specific_statfiles(classifier, task)
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local spec_st = {}
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-- More 5 recipients
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local st_many = classifier:get_statfile_by_label(many_recipients_label)
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if st_many then
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local rcpt = task:get_recipients(2)
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if rcpt and #rcpt > 5 then
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fun.each(function(v) table.insert(spec_st,v) end, st_many)
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end
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end
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-- Undisclosed
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local st_undisc = classifier:get_statfile_by_label(undisclosed_recipients_label)
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if st_undisc then
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local rcpt = task:get_recipients(2)
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if rcpt and #rcpt == 0 then
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fun.each(function(v) table.insert(spec_st,v) end, st_undisc)
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end
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end
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-- Maillist
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local st_maillist = classifier:get_statfile_by_label(list_label)
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if st_maillist then
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local unsub_header = task:get_header_raw('List-Unsubscribe')
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if unsub_header then
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fun.each(function(v) table.insert(spec_st,v) end, st_maillist)
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end
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end
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-- Long subject
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local st_longsubj = classifier:get_statfile_by_label(long_subject_label)
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if st_longsubj then
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local subj = task:get_header_raw('Subject')
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if subj and string.len(subj) > 150 then
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fun.each(function(v) table.insert(spec_st,v) end, st_longsubj)
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end
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end
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if #spec_st > 1 then
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return spec_st
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else
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return nil
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end
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end
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classifiers['bayes'] = function(classifier, task, is_learn)
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-- Subfunction for detection of message's language
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local detect_language = function()
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local parts = task:get_text_parts()
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for _,p in ipairs(parts) do
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local l = p:get_language()
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if l then
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return l
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end
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end
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return nil
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end
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-- Main procedure
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local selected = {}
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local spec_st = get_specific_statfiles(classifier, task)
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if spec_st then
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if is_learn then
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return spec_st
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else
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-- Merge tables
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fun.each(function(v) table.insert(selected,v) end, spec_st)
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end
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end
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-- Detect statfile by language
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local language = detect_language()
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if language then
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-- Find statfiles with specified language
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for _,st in ipairs(classifier:get_statfiles()) do
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-- Skip labeled statfiles
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if not st:get_label() then
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local st_l = st:get_param('language')
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if st_l and st_l == language then
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-- Insert statfile with specified language
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table.insert(selected, st)
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end
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end
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end
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if #selected > 1 then
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return selected
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end
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end
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-- Language not detected or specific language statfiles have not been found
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for _,st in ipairs(classifier:get_statfiles()) do
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-- Skip labeled statfiles
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if not st:get_label() then
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local st_l = st:get_param('language')
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-- Insert only statfiles without language
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if not st_l then
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table.insert(selected, st)
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end
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end
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end
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if #selected > 1 then
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return selected
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end
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return nil
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end
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