ffi = require("ffi")
ffi.cdef[[
int init_dpath(const char *conf);
uint8_t *get_dpath(const uint8_t *uri);
]]
dpath = ffi.load('diskdisp');
init = dpath.init_dpath("/usr/local/openresty/nginx/conf/dpath");
if init ~= 0 then
    os.exit(1);
end