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-- This function parses redis server definition using either
-- specific server string for this module or global
-- redis section
function rspamd_parse_redis_server(module_name)
local default_port = 6379
local default_timeout = 1.0
local logger = require "rspamd_logger"
local upstream_list = require "rspamd_upstream_list"
local function try_load_redis_servers(options)
-- Try to get read servers:
local upstreams_read, upstreams_write
if options['read_servers'] then
upstreams_read = upstream_list.create(rspamd_config,
options['read_servers'], default_port)
elseif options['servers'] then
upstreams_read = upstream_list.create(rspamd_config,
options['servers'], default_port)
elseif options['server'] then
upstreams_read = upstream_list.create(rspamd_config,
options['server'], default_port)
end
if upstreams_read then
if options['write_servers'] then
upstreams_write = upstream_list.create(rspamd_config,
options['write_servers'], default_port)
else
upstreams_write = upstreams_read
end
end
if upstreams_write and upstreams_read then
local ret = {
read_servers = upstreams_read,
write_servers = upstreams_write,
}
ret['timeout'] = default_timeout
if options['timeout'] then
ret['timeout'] = tonumber(options['timeout'])
end
if options['prefix'] then
ret['prefix'] = options['prefix']
end
if options['db'] then
ret['db'] = options['db']
elseif options['dbname'] then
ret['db'] = options['dbname']
end
if options['password'] then
ret['password'] = options['password']
end
return ret
end
return nil
end
local opts = rspamd_config:get_all_opt(module_name)
local ret
if opts then
ret = try_load_redis_servers(opts)
end
if ret then
return ret
end
opts = rspamd_config:get_all_opt('redis')
if opts then
if opts[module_name] then
ret = try_load_redis_servers(opts[module_name])
if ret then
return ret
end
else
ret = try_load_redis_servers(opts)
if opts['disabled_modules'] then
for _,v in ipairs(opts['disabled_modules']) do
if v == module_name then
logger.infox(rspamd_config, "NOT using default redis server for module %s: it is disabled",
module_name)
return nil
end
end
end
if ret then
logger.infox(rspamd_config, "using default redis server for module %s",
module_name)
end
end
end
return ret
end
-- Performs async call to redis hiding all complexity inside function
-- task - rspamd_task
-- redis_params - valid params returned by rspamd_parse_redis_server
-- key - key to select upstream or nil to select round-robin/master-slave
-- is_write - true if need to write to redis server
-- callback - function to be called upon request is completed
-- command - redis command
-- args - table of arguments
function rspamd_redis_make_request(task, redis_params, key, is_write, callback, command, args)
if not task or not redis_params or not callback or not command then
return false,nil,nil
end
local addr
local rspamd_redis = require "rspamd_redis"
if key then
if is_write then
addr = redis_params['write_servers']:get_upstream_by_hash(key)
else
addr = redis_params['read_servers']:get_upstream_by_hash(key)
end
else
if is_write then
addr = redis_params['write_servers']:get_upstream_master_slave(key)
else
addr = redis_params['read_servers']:get_upstream_round_robin(key)
end
end
if not addr then
logger.errx(task, 'cannot select server to make redis request')
end
local options = {
task = task,
callback = callback,
host = addr:get_addr(),
timeout = redis_params['timeout'],
cmd = command,
args = args
}
if redis_params['password'] then
options['password'] = redis_params['password']
end
if redis_params['db'] then
options['dbname'] = redis_params['db']
end
local ret,conn = rspamd_redis.make_request(options)
return ret,conn,addr
end
function rspamd_str_split(s, sep)
local lpeg = require "lpeg"
sep = lpeg.P(sep)
local elem = lpeg.C((1 - sep)^0)
local p = lpeg.Ct(elem * (sep * elem)^0) -- make a table capture
return lpeg.match(p, s)
end
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