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-- Copyright (C) Yichun Zhang (agentzh)
local base = require "resty.core.base"
base.allows_subsystem('http', 'stream')
local ffi = require 'ffi'
local ffi_string = ffi.string
local get_string_buf = base.get_string_buf
local get_size_ptr = base.get_size_ptr
local C = ffi.C
local new_tab = base.new_tab
local ffi_new = ffi.new
local charpp = ffi_new("char *[1]")
local intp = ffi.new("int[1]")
local num_value = ffi_new("double[1]")
local get_request = base.get_request
local tonumber = tonumber
local type = type
local error = error
local subsystem = ngx.config.subsystem
local ngx_lua_ffi_errlog_set_filter_level
local ngx_lua_ffi_errlog_get_msg
local ngx_lua_ffi_errlog_get_sys_filter_level
local ngx_lua_ffi_raw_log
local _M = { version = base.version }
if subsystem == 'http' then
ffi.cdef[[
int ngx_http_lua_ffi_errlog_set_filter_level(int level, unsigned char *err,
size_t *errlen);
int ngx_http_lua_ffi_errlog_get_msg(char **log, int *loglevel,
unsigned char *err, size_t *errlen, double *log_time);
int ngx_http_lua_ffi_errlog_get_sys_filter_level(ngx_http_request_t *r);
int ngx_http_lua_ffi_raw_log(ngx_http_request_t *r, int level,
const unsigned char *s, size_t s_len);
]]
ngx_lua_ffi_errlog_set_filter_level =
C.ngx_http_lua_ffi_errlog_set_filter_level
ngx_lua_ffi_errlog_get_msg = C.ngx_http_lua_ffi_errlog_get_msg
ngx_lua_ffi_errlog_get_sys_filter_level =
C.ngx_http_lua_ffi_errlog_get_sys_filter_level
ngx_lua_ffi_raw_log = C.ngx_http_lua_ffi_raw_log
elseif subsystem == 'stream' then
ffi.cdef[[
int ngx_stream_lua_ffi_errlog_set_filter_level(int level, unsigned char *err,
size_t *errlen);
int ngx_stream_lua_ffi_errlog_get_msg(char **log, int *loglevel,
unsigned char *err, size_t *errlen, double *log_time);
int ngx_stream_lua_ffi_errlog_get_sys_filter_level(ngx_stream_lua_request_t *r);
int ngx_stream_lua_ffi_raw_log(ngx_stream_lua_request_t *r, int level,
const unsigned char *s, size_t s_len);
]]
ngx_lua_ffi_errlog_set_filter_level =
C.ngx_stream_lua_ffi_errlog_set_filter_level
ngx_lua_ffi_errlog_get_msg = C.ngx_stream_lua_ffi_errlog_get_msg
ngx_lua_ffi_errlog_get_sys_filter_level =
C.ngx_stream_lua_ffi_errlog_get_sys_filter_level
ngx_lua_ffi_raw_log = C.ngx_stream_lua_ffi_raw_log
end
local ERR_BUF_SIZE = 128
local FFI_ERROR = base.FFI_ERROR
function _M.set_filter_level(level)
if not level then
return nil, [[missing "level" argument]]
end
local err = get_string_buf(ERR_BUF_SIZE)
local errlen = get_size_ptr()
errlen[0] = ERR_BUF_SIZE
local rc = ngx_lua_ffi_errlog_set_filter_level(level, err, errlen)
if rc == FFI_ERROR then
return nil, ffi_string(err, errlen[0])
end
return true
end
function _M.get_logs(max, logs)
local err = get_string_buf(ERR_BUF_SIZE)
local errlen = get_size_ptr()
errlen[0] = ERR_BUF_SIZE
local log = charpp
local loglevel = intp
local log_time = num_value
max = max or 10
if not logs then
logs = new_tab(max * 3 + 1, 0)
end
local count = 0
for i = 1, max do
local loglen = ngx_lua_ffi_errlog_get_msg(log, loglevel, err, errlen,
log_time)
if loglen == FFI_ERROR then
return nil, ffi_string(err, errlen[0])
end
if loglen > 0 then
logs[count + 1] = loglevel[0]
logs[count + 2] = log_time[0]
logs[count + 3] = ffi_string(log[0], loglen)
count = count + 3
end
if loglen < 0 then -- no error log
logs[count + 1] = nil
break
end
if i == max then -- last one
logs[count + 1] = nil
break
end
end
return logs
end
function _M.get_sys_filter_level()
local r = get_request()
return tonumber(ngx_lua_ffi_errlog_get_sys_filter_level(r))
end
function _M.raw_log(level, msg)
if type(level) ~= "number" then
error("bad argument #1 to 'raw_log' (must be a number)", 2)
end
if type(msg) ~= "string" then
error("bad argument #2 to 'raw_log' (must be a string)", 2)
end
local r = get_request()
local rc = ngx_lua_ffi_raw_log(r, level, msg, #msg)
if rc == FFI_ERROR then
error("bad log level", 2)
end
end
return _M