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-- Copyright (C) 2013 Jiale Zhi (calio), Cloudflare Inc.
-- require "luacov"
local type = type
local byte = string.byte
local sub = string.sub
local format = string.format
local log = ngx.log
local ERR = ngx.ERR
local EQUAL = byte("=")
local SEMICOLON = byte(";")
local SPACE = byte(" ")
local HTAB = byte("\t")
local ok, new_tab = pcall(require, "table.new")
if not ok then
new_tab = function (narr, nrec) return {} end
end
local _M = new_tab(0, 2)
_M._VERSION = '0.01'
local mt = { __index = _M }
local function get_cookie_table(text_cookie)
if type(text_cookie) ~= "string" then
log(ERR, format("expect text_cookie to be \"string\" but found %s",
type(text_cookie)))
return {}
end
local EXPECT_KEY = 1
local EXPECT_VALUE = 2
local EXPECT_SP = 3
local n = 0
local len = #text_cookie
for i=1, len do
if byte(text_cookie, i) == SEMICOLON then
n = n + 1
end
end
local cookie_table = new_tab(n + 1)
local state = EXPECT_SP
local i = 1
local j = 1
local key, value
while j <= len do
if state == EXPECT_KEY then
if byte(text_cookie, j) == EQUAL then
key = sub(text_cookie, i, j - 1)
state = EXPECT_VALUE
i = j + 1
end
elseif state == EXPECT_VALUE then
if byte(text_cookie, j) == SEMICOLON
or byte(text_cookie, j) == SPACE
or byte(text_cookie, j) == HTAB
then
value = sub(text_cookie, i, j - 1)
cookie_table[key] = value
key, value = nil, nil
state = EXPECT_SP
i = j + 1
end
elseif state == EXPECT_SP then
if byte(text_cookie, j) ~= SPACE
and byte(text_cookie, j) ~= HTAB
then
state = EXPECT_KEY
i = j
j = j - 1
end
end
j = j + 1
end
if key ~= nil and value == nil then
cookie_table[key] = sub(text_cookie, i)
end
return cookie_table
end
function _M.new(self)
local _cookie = ngx.var.http_cookie
if not _cookie then
return nil, "no cookie found in current request"
end
return setmetatable({ _cookie = _cookie }, mt)
end
function _M.get(self, key)
if self.cookie_table == nil then
self.cookie_table = get_cookie_table(self._cookie)
end
return self.cookie_table[key]
end
function _M.get_all(self)
local err
if self.cookie_table == nil then
self.cookie_table = get_cookie_table(self._cookie)
end
return self.cookie_table
end
return _M
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