lua生成uuid

local ffi = require "ffi"

ffi.cdef[[

typedef unsigned char uuid_t[16];

void uuid_generate(uuid_t out);

void uuid_unparse(const uuid_t uu, char *out);

]]

local uuid = ffi.load("libuuid")

if uuid then

local uuid_t = ffi.new("uuid_t")

local uuid_out = ffi.new("char[64]")

uuid.uuid_generate(uuid_t)

uuid.uuid_unparse(uuid_t, uuid_out)

result = ffi.string(uuid_out)

ngx.say(result)

else

ngx.say("load uuid failed!")

end