Hi.
I have written a blog post how to use this lua scirpt in a dockerized
haproxy.
https://www.me2digital.com/blog/2018/01/show-headers-in-haproxy/
I appreciate any feedback ;-)
Best regards
Aleks
-- Originalnachricht --
Von: "Aleksandar Lazic"
An: haproxy@formilux.org
Gesendet: 10.01.2018 23:33:01
Betreff: Print header lua script
Hi.
I have the need to print the request headers which reaches the haproxy.
Today I was sitting down and started to write this small script.
Due to the fact that this is my first lua & haproxy script I'm sure
it's not the most efficient version ;-)
I appreciate any feedback ;-)
### print_headers.lua
core.register_action("print-headers",{ "http-req" },
function(transaction)
--[[
transaction is of class TXN.
TXN contains contains a property 'http' which is an instance
of HAProxy HTTP class
]]
local hdr = transaction.http:req_get_headers()
for key,value in pairs(hdr) do
local mystr = key
mystr = mystr .. ": "
for _ ,val2 in pairs(value) do
mystr = mystr .. val2
end
core.Info(mystr)
end
end)
###
### haproxy.cfg
global
log /dev/log local1 debug
lua-load /etc/haproxy/print_headers.lua
defaults
log global
mode http
listen proxy001
http-request lua.print-headers
###
One issue is that I have every entry twice in the log, I assume this
could be because I defined the loglevel "debug" and the 'core.Info' is
in info level
###
Jan 10 23:22:58 app001 haproxy[26681]: accept-encoding: deflate, gzip
Jan 10 23:22:58 app001 haproxy[26681]: accept-encoding: deflate, gzip
Jan 10 23:22:58 app001 haproxy[26681]: content-type: application/json
Jan 10 23:22:58 app001 haproxy[26681]: content-type: application/json
Jan 10 23:22:58 app001 haproxy[26681]: user-agent: curl/7.47.0
Jan 10 23:22:58 app001 haproxy[26681]: user-agent: curl/7.47.0
Jan 10 23:22:58 app001 haproxy[26681]: x-request-id: 3
Jan 10 23:22:58 app001 haproxy[26681]: x-request-id: 3
Jan 10 23:22:58 app001 haproxy[26681]: content-length: 63
Jan 10 23:22:58 app001 haproxy[26681]: content-length: 63
Jan 10 23:22:58 app001 haproxy[26681]: host: MY_HOST:1234
Jan 10 23:22:58 app001 haproxy[26681]: host: MY_HOST:1234
Jan 10 23:22:58 app001 haproxy[26681]: accept: */*
Jan 10 23:22:58 app001 haproxy[26681]: accept: */*
###
Thanks for feedback.
aleks
