I'm working on integrating HAProxy with traceable.ai's security product. As part of the integration, we'd like to capture the contents of any http responses processed by HAProxy and send them to a service either via SPOA or an RPC call from Lua. The response contents are used by the product to help identify possible security threats.
I've tried a few things, but haven't found a reliable way to capture the contents of response bodies. Is this possible with HAProxy? Here are the approaches I've explored so far: 1. I used the "res.body" fetch but that only provides the contents sometimes (I presume if it's available in a buffer): https://github.com/rnburn/haproxy-extcap/blob/master/test/docker/extcap.conf#L19 2. I also tried accessing the contents of the response channel from a Lua action, but that fails with "Cannot manipulate HAProxy channels in HTTP mode" https://github.com/rnburn/haproxy-extcap/blob/master/test/docker/response.lua#L5
