Thank you Willy, that's an honest answer. You grasped my "practical" concern (I always thought "Examples" section in man pages should be moved up high :) I've been to blog.haproxy.com, and no full-fat Lua meals there as of yet. I understand this is a new hot thing with HAProxy, so we'll have to wait for it to grow & thrive.. Sure I'll report back here if I get to the point where I get some Lua code to do this (even a lame contraption).
That being said, if a charitable soul here around can provide some working Lua code for modifying backend response in TCP mode, or a battle plan for the concept, that would be nice. Also, maybe this can be made a new feature in 1.7, even minimally : search for a stretch of bytes and replace with some other byte sequence (rewrites for TCP, basically), append a piece of data, .. that kind of simple stuff (at the user's own peril, of course. Shuffling bytes is for adults). Would be nice, and doesn't sound daunting to implement.. Forgot to mention : HAProxy is freakin'great ! On Fri, Oct 16, 2015 at 7:15 PM, Willy Tarreau <w...@1wt.eu> wrote: > Hello, > > On Fri, Oct 16, 2015 at 06:38:16PM +0200, One Seeker wrote: > > Hello, > > > > I would like to manipulate some data from a TCP backend (modify data > before > > it is forwarded to client), and this is not supported (it is for HTTP > with > > rewrites, but not in TCP mode). > > > > With v1.6, Lua scripting brings hope, but the documentation is lacking > > (doc/lua-api/index.rst is a bit of a harsh place to start learning this > > aspect of HAProxy).. > > Is there an "elaborate" (or advanced) example of using Lua with HAProxy > > (not a Hello World) I can learn from (I'm very good at learning from > > real-world code :), not necessarily doing what I'm describing here, but > > just doing some real stuff to showcase Lua for HAProxy.. > > I understand what you're looking for. I've seen that Thierry is currently > working on a nice doc, but as any doc, it takes at least as long to write > as it took to implement the documented features. There are some simple > examples on blog.haproxy.com, I don't know if they help you enough. Maybe > at some point if you post what you came up with, someone here could help > you finish. > > That's all I can provide for now :-/ > > willy > >
