Process large headers ranging from 8Kb to 1Mb on haproxy using tune.bufsize and tune.maxrewrite

Help!
1

I am currently doing a POC on haproxy.
Haproxy gives the TR time which is time required to receive the first byte of header to last byte of header.
I want to use this TR time for my purpose.
Currently I have set following values in global section

tune.bufsize 131702
tune.maxrewrite 32768

But I am getting
400 Bad Request
Request Header Or Cookie Too Large

I understand header should not be large but in this case I need to check by sending large header

2

@lukastribus Please share your thoughts

3

If you have a header of 1MB then haproxy will not be able to help you.

If you have a decent sized header that based on the tune.bufsize and tune.maxrewrite documentation should theoretically pass but does not, then you will have to share full header length and header line length.

4

It is working now. My request was going to nginx and that’s why it was rejected from nginx