pack/unpack binary data in nginx+lua

and.enshin · 2017-06-01T23:54:20+00:00

Can someone please provide some guidance on how I can repair this situation? Was not familiar with this OpenResty before seeing this fantastic error message....

pack/unpack binary data in nginx+lua

and.enshin

Hi2all!

I have to unpack binary data using unpack as i do it in Perl. There is lpack but i have no idea how i can bring it to openresty?
Or are there any other ability to unpack it using functionality from the box?

Thnaks

jim.robinson

I've used https://github.com/antirez/lua-cmsgpack and thought it worked well. Once they are installed under the openresty luajit/lib directory, you can just load them up and use them:

local cmsgpack = require("cmsgpack.safe")

local cpack = cmsgpack.pack

local cunpack = cmsgpack.unpack

...

local head, err = cpack(meta, status, response.header)

...

local meta, status, header, err = cunpack(head)

I happened to use a LuaRocks based installations for mine, though I see now that there is encouragement to use an OpenResty specific package manager (https://opm.openresty.org/): https://openresty.org/en/using-luarocks.html

On Thursday, June 1, 2017 at 8:54:20 AM UTC-7, Андрей Еньшин wrote:

I have to unpack binary data using unpack as i do it in Perl. There is lpack but i have no idea how i can bring it to openresty?
Or are there any other ability to unpack it using functionality from the box?