[Varnish] #905: Modification of multi-line beresp or resp header mangles value

[Varnish]

#905: Modification of multi-line beresp or resp header mangles value
-------------------+--------------------------------------------------------
 Reporter:  lrowe  |        Type:  defect  
   Status:  new    |    Priority:  normal  
Milestone:         |   Component:  varnishd
  Version:  2.1.5  |    Severity:  normal  
 Keywords:         |  
-------------------+--------------------------------------------------------
 In order to work around an nginx bug (nginx is in front of varnish), I
 would like to merge the multiline Vary header from my backend into  a
 single line. Attempting this with the following minimal vcl
 {{{
 backend default { .host = "127.0.0.1"; .port = "8080"; }
 sub vcl_fetch { set beresp.http.Vary = regsuball(beresp.http.Vary, ",\s+",
 ", "); }
 }}}
 Results in the multiple lines of the header being split up, as can be seen
 in the varnishlog excerpts (full log attached):
 {{{
 9 RxProtocol   b HTTP/1.1
 9 RxStatus     b 200
 9 RxResponse   b OK
 9 RxHeader     b Server: Zope/(2.13.6, python 2.6.6, darwin) ZServer/1.1
 9 RxHeader     b Date: Mon, 18 Apr 2011 14:44:14 GMT
 9 RxHeader     b Content-Length: 2701
 9 RxHeader     b X-Cache-Operation: plone.app.caching.moderateCaching
 9 RxHeader     b Content-Language:
 9 RxHeader     b Content-Encoding: gzip
 9 RxHeader     b Expires: Fri, 20 Apr 2001 14:44:14 GMT
 9 RxHeader     b Vary: X-Anonymous,
 9 RxHeader     b    Accept-Encoding
 9 RxHeader     b ETag: "||373||1|Sunburst Theme|0|0|1302790083.61"
 9 RxHeader     b Cache-Control: max-age=0, s-maxage=3600, must-revalidate
 9 RxHeader     b X-Cache-Rule: plone.content.folderView
 9 RxHeader     b Content-Type: text/html;charset=utf-8
 ...
 7 VCL_call     c fetch
 7 VCL_return   c deliver
 7 ObjProtocol  c HTTP/1.1
 7 ObjStatus    c 200
 7 ObjResponse  c OK
 7 ObjHeader    c Server: Zope/(2.13.6, python 2.6.6, darwin) ZServer/1.1
 7 ObjHeader    c Date: Mon, 18 Apr 2011 14:44:14 GMT
 7 ObjHeader    c X-Cache-Operation: plone.app.caching.moderateCaching
 7 ObjHeader    c Content-Language:
 7 ObjHeader    c Content-Encoding: gzip
 7 ObjHeader    c Expires: Fri, 20 Apr 2001 14:44:14 GMT
 7 ObjHeader    c    Accept-Encoding
 7 ObjHeader    c ETag: "||373||1|Sunburst Theme|0|0|1302790083.61"
 7 ObjHeader    c Cache-Control: max-age=0, s-maxage=3600, must-revalidate
 7 ObjHeader    c X-Cache-Rule: plone.content.folderView
 7 ObjHeader    c Content-Type: text/html;charset=utf-8
 7 ObjHeader    c Vary: X-Anonymous,
 }}}
 The same effect is seen when using:
 {{{
 sub vcl_deliver { set resp.http.Vary = regsuball(resp.http.Vary, ",\s+",
 ", "); }
 }}}

-- 
Ticket URL: <http://www.varnish-cache.org/trac/ticket/905>
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