mirror of
https://github.com/rspamd/rspamd.git
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70 lines
1.9 KiB
Lua
70 lines
1.9 KiB
Lua
--[[
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Copyright (c) 2017, 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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local rspamd_regexp = require "rspamd_regexp"
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local util = require "rspamd_util"
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-- Uncategorized rules
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local subject_re = rspamd_regexp.create('/^(?:(?:Re|Fwd|Fw|Aw|Antwort|Sv):\\s*)+(.+)$/i')
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local function test_subject(task, check_function, rate)
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local function normalize_linear(a, x)
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local f = a * x
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return true, (( f < 1 ) and f or 1), tostring(x)
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end
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local sbj = task:get_header('Subject')
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if sbj then
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local stripped_subject = subject_re:search(sbj, false, true)
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if stripped_subject and stripped_subject[1] and stripped_subject[1][2] then
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sbj = stripped_subject[1][2]
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end
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local l = util.strlen_utf8(sbj)
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if check_function(sbj, l) then
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return normalize_linear(rate, l)
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end
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end
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return false
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end
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rspamd_config.SUBJ_ALL_CAPS = {
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callback = function(task)
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local caps_test = function(sbj)
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return util.is_uppercase(sbj)
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end
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return test_subject(task, caps_test, 1.0/40.0)
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end,
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score = 3.0,
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group = 'subject',
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type = 'mime',
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description = 'All capital letters in subject'
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}
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rspamd_config.LONG_SUBJ = {
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callback = function(task)
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local length_test = function(_, len)
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return len > 200
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end
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return test_subject(task, length_test, 1.0/400.0)
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end,
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score = 3.0,
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group = 'subject',
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type = 'mime',
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description = 'Subject is too long'
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} |