manipulate post body with Lua

info · 2014-05-01T17:17:52+00:00

First of all, you should try the latest version which actually is 1.5.12.1. Second, post your configuration so people on the li...

manipulate post body with Lua

info

This is a nice example: http://stackoverflow.com/questions/22788236/how-can-i-manipulate-the-json-body-of-a-post-request-using-nginx-and-lua

However I need to edit a POST eventbody on a binary level, the body contains xml code and some binary data which needs to be changed, for now I'm using a perl intercept script between the proxypass output and a tomcat backend but I'd like to do this with Lua, any ideas ?

agentzh

Hello!

On Thu, May 1, 2014 at 2:17 AM,  <i...@ecsystems.nl> wrote:
> This is a nice example:
> http://stackoverflow.com/questions/22788236/how-can-i-manipulate-the-json-body-of-a-post-request-using-nginx-and-lua
>
> However I need to edit a POST eventbody on a binary level, the body contains
> xml code and some binary data which needs to be changed, for now I'm using a
> perl intercept script between the proxypass output and a tomcat backend but
> I'd like to do this with Lua, any ideas ?
>

You can still use ngx.req.get_body_data() and ngx.req.set_body_data()
for this. Regarding the binary data manipulation part, I don't see why
you cannot do that in Lua, especially with LuaJIT's built-in "bit"
module:

    http://luajit.org/extensions.html

Both my lua-resty-websocket and lua-resty-mysql libraries deal with
binary data parsing and construction efficiently in pure Lua (because
both WebSocket and MySQL use binary wire protocol):

    https://github.com/openresty/lua-resty-websocket

    https://github.com/openresty/lua-resty-mysql

Regards,
-agentzh