/usr/share/lua/5.1/nginx/redis.lua is in lua-nginx-redis 0.15-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 | -- Copyright (C) 2012 Yichun Zhang (agentzh)
local sub = string.sub
local tcp = ngx.socket.tcp
local insert = table.insert
local concat = table.concat
local len = string.len
local null = ngx.null
local pairs = pairs
local unpack = unpack
local setmetatable = setmetatable
local tonumber = tonumber
local error = error
module(...)
_VERSION = '0.15'
local commands = {
"append", "auth", "bgrewriteaof",
"bgsave", "blpop", "brpop",
"brpoplpush", "config", "dbsize",
"debug", "decr", "decrby",
"del", "discard", "echo",
"eval", "exec", "exists",
"expire", "expireat", "flushall",
"flushdb", "get", "getbit",
"getrange", "getset", "hdel",
"hexists", "hget", "hgetall",
"hincrby", "hkeys", "hlen",
"hmget", --[[ "hmset", ]] "hset",
"hsetnx", "hvals", "incr",
"incrby", "info", "keys",
"lastsave", "lindex", "linsert",
"llen", "lpop", "lpush",
"lpushx", "lrange", "lrem",
"lset", "ltrim", "mget",
"monitor", "move", "mset",
"msetnx", "multi", "object",
"persist", "ping", "psubscribe",
"publish", "punsubscribe", "quit",
"randomkey", "rename", "renamenx",
"rpop", "rpoplpush", "rpush",
"rpushx", "sadd", "save",
"scard", "script",
"sdiff", "sdiffstore",
"select", "set", "setbit",
"setex", "setnx", "setrange",
"shutdown", "sinter", "sinterstore",
"sismember", "slaveof", "slowlog",
"smembers", "smove", "sort",
"spop", "srandmember", "srem",
"strlen", "subscribe", "sunion",
"sunionstore", "sync", "ttl",
"type", "unsubscribe", "unwatch",
"watch", "zadd", "zcard",
"zcount", "zincrby", "zinterstore",
"zrange", "zrangebyscore", "zrank",
"zrem", "zremrangebyrank", "zremrangebyscore",
"zrevrange", "zrevrangebyscore", "zrevrank",
"zscore", "zunionstore", "evalsha"
}
local mt = { __index = _M }
function new(self)
local sock, err = tcp()
if not sock then
return nil, err
end
return setmetatable({ sock = sock }, mt)
end
function set_timeout(self, timeout)
local sock = self.sock
if not sock then
return nil, "not initialized"
end
return sock:settimeout(timeout)
end
function connect(self, ...)
local sock = self.sock
if not sock then
return nil, "not initialized"
end
return sock:connect(...)
end
function set_keepalive(self, ...)
local sock = self.sock
if not sock then
return nil, "not initialized"
end
return sock:setkeepalive(...)
end
function get_reused_times(self)
local sock = self.sock
if not sock then
return nil, "not initialized"
end
return sock:getreusedtimes()
end
function close(self)
local sock = self.sock
if not sock then
return nil, "not initialized"
end
return sock:close()
end
local function _read_reply(sock)
local line, err = sock:receive()
if not line then
return nil, err
end
local prefix = sub(line, 1, 1)
if prefix == "$" then
-- print("bulk reply")
local size = tonumber(sub(line, 2))
if size < 0 then
return null
end
local data, err = sock:receive(size)
if not data then
return nil, err
end
local dummy, err = sock:receive(2) -- ignore CRLF
if not dummy then
return nil, err
end
return data
elseif prefix == "+" then
-- print("status reply")
return sub(line, 2)
elseif prefix == "*" then
local n = tonumber(sub(line, 2))
-- print("multi-bulk reply: ", n)
if n < 0 then
return null
end
local vals = {};
for i = 1, n do
local res, err = _read_reply(sock)
if res then
insert(vals, res)
elseif res == nil then
return nil, err
else
-- be a valid redis error value
insert(vals, {false, err})
end
end
return vals
elseif prefix == ":" then
-- print("integer reply")
return tonumber(sub(line, 2))
elseif prefix == "-" then
-- print("error reply: ", n)
return false, sub(line, 2)
else
return nil, "unkown prefix: \"" .. prefix .. "\""
end
end
local function _gen_req(args)
local req = {"*", #args, "\r\n"}
for i = 1, #args do
local arg = args[i]
if not arg then
insert(req, "$-1\r\n")
else
insert(req, "$")
insert(req, len(arg))
insert(req, "\r\n")
insert(req, arg)
insert(req, "\r\n")
end
end
-- it is faster to do string concatenation on the Lua land
return concat(req, "")
end
local function _do_cmd(self, ...)
local args = {...}
local sock = self.sock
if not sock then
return nil, "not initialized"
end
local req = _gen_req(args)
local reqs = self._reqs
if reqs then
insert(reqs, req)
return
end
-- print("request: ", table.concat(req, ""))
local bytes, err = sock:send(req)
if not bytes then
return nil, err
end
return _read_reply(sock)
end
function read_reply(self)
local sock = self.sock
if not sock then
return nil, "not initialized"
end
return _read_reply(sock)
end
for i = 1, #commands do
local cmd = commands[i]
_M[cmd] =
function (self, ...)
return _do_cmd(self, cmd, ...)
end
end
function hmset(self, hashname, ...)
local args = {...}
if #args == 1 then
local t = args[1]
local array = {}
for k, v in pairs(t) do
insert(array, k)
insert(array, v)
end
-- print("key", hashname)
return _do_cmd(self, "hmset", hashname, unpack(array))
end
-- backwards compatibility
return _do_cmd(self, "hmset", hashname, ...)
end
function init_pipeline(self)
self._reqs = {}
end
function cancel_pipeline(self)
self._reqs = nil
end
function commit_pipeline(self)
local reqs = self._reqs
if not reqs then
return nil, "no pipeline"
end
self._reqs = nil
local sock = self.sock
if not sock then
return nil, "not initialized"
end
local bytes, err = sock:send(reqs)
if not bytes then
return nil, err
end
local vals = {}
for i = 1, #reqs do
local res, err = _read_reply(sock)
if res then
insert(vals, res)
elseif res == nil then
return nil, err
else
-- be a valid redis error value
insert(vals, {false, err})
end
end
return vals
end
function array_to_hash(self, t)
local h = {}
for i = 1, #t, 2 do
h[t[i]] = t[i + 1]
end
return h
end
local class_mt = {
-- to prevent use of casual module global variables
__newindex = function (table, key, val)
error('attempt to write to undeclared variable "' .. key .. '"')
end
}
function add_commands(...)
local cmds = {...}
local newindex = class_mt.__newindex
class_mt.__newindex = nil
for i = 1, #cmds do
local cmd = cmds[i]
_M[cmd] =
function (self, ...)
return _do_cmd(self, cmd, ...)
end
end
class_mt.__newindex = newindex
end
setmetatable(_M, class_mt)
|