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blindsnowmobile
Asked: 2016-06-07 13:12:59 +0800 CST

HAProxy, why would a replaced HTTP header have a number at the end?

  • 772

Can someone explain what the "X-Forwarded-Proto2" header is in this HAProxy frontend stanza?:

frontend main *:443
  ...
  reqirep ^(X-Forwarded-Proto:)(.*) X-Forwarded-Proto2:\2
  ...

I understand that HAProxy is injecting a HTTP header. But why is there a 2 at the end of the new string? I'm referring to the number "2" at the end of the header, not the regex backreference.

http haproxy http-headers x-forwarded-for

0 Answers