400 Bad request

@rhada wrote:

Hello,

I have an issue i can’t achieve to fix.

My proxy take request with a custom header to authenticate users. For reasons, some requests are rejected by the proxy with a 400 error. a show errors on the socket let me think that custom header is causing the error (i have replace sensitive data) :

 # echo "show errors" | socat /var/lib/haproxy/stats stdio
Total events captured on [02/Nov/2018:11:59:39.817] : 35
 
[02/Nov/2018:11:57:54.645] frontend http (#4): invalid request
  backend <NONE> (#-1), server <NONE> (#-1), event #34
  src xx.xx.xx.xx:xxxx, session #8587, session flags 0x00000080
  HTTP msg state MSG_RQMETH(2), msg flags 0x00000000, tx flags 0x84000000
  HTTP chunk len 0 bytes, HTTP body len 0 bytes
  buffer flags 0x00808002, out 0 bytes, total 25 bytes
  pending 25 bytes, wrapping at 16384, error at position 8:
 
  00000  MSP-CLID: xxxxxxxxxxxxxx\r\n
  00023  \r\n

One thing i can’t explain, custom header is X-MSP-CLID, but the error show MSP-CLID. Is there a good reason ?
A network capture show full header as intended.

Most of the requests are well forwarded, only some are rejected

If i set option accept-invalid-http-request the problem persists

Can someone help me to sort out this issue ?

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