haproxy/doc/cookie-options.txt

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2011/04/13 : List of possible cookie settings with associated behaviours.
PSV="preserve", PFX="prefix", INS="insert", REW="rewrite", IND="indirect"
0 = option not set
1 = option is set
* = option doesn't matter
PSV PFX INS REW IND Behaviour
0 0 0 0 0 passive mode
0 0 0 0 1 passive + indirect : remove response if not needed
0 0 0 1 0 always rewrite response
0 0 1 0 0 always insert or replace response
0 0 1 0 1 insert + indirect : remove req and also resp if not needed
* * 1 1 * [ forbidden ]
0 1 0 0 0 prefix
0 1 0 0 1 !! prefix on request, remove response cookie if not needed
* 1 * 1 * [ forbidden ]
* 1 1 * * [ forbidden ]
* * * 1 1 [ forbidden ]
1 * 0 * 0 [ forbidden ]
1 0 0 0 1 passive mode (alternate form)
1 0 1 0 0 insert only, and preserve server response cookie if any
1 0 1 0 1 conditional insert only for new requests
1 1 0 0 1 prefix on requests only (passive prefix)