[Varnish] #866: Multiple headers with the same name on different lines are ignored

[Varnish]

#866: Multiple headers with the same name on different lines are ignored
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 Reporter:  soheil                                               |        Type:  defect  
   Status:  new                                                  |    Priority:  high    
Milestone:                                                       |   Component:  varnishd
  Version:  trunk                                                |    Severity:  major   
 Keywords:  multiple headers, same headers, VRT_GetHdr, headers  |  
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 If incoming request contains duplicate headers with different content only
 the first one is accessible to varnish req.http.X-Forwarded-For and
 similarly in C: char *xForwarded = VRT_GetHdr(sp, HDR_REQ, "\020X-
 Forwarded-For:");

 returns only the first occurrence of the specified header.

 A concatenated list of values would seem to be most logical.

 For example if geo-targeting needed to be done in varnish based on
 client's IP address. This would be useful when a load balancer sends
 multiple X-Forwarded-For headers for a request to varnish and only one of
 those values is the IP address of the client.

 An over-generalization in RFC2616, is that headers which contain comma-
 separated lists, can be spread over multiple header lines.

 This is related to but not the same as: http://varnish-
 cache.org/trac/ticket/686

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Ticket URL: <http://varnish-cache.org/trac/ticket/866>
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