Hello!
The following patch series is expected to resolve issues with multiple
headers with identical names. In particular, the following Trac tickets
are fixed:
https://trac.nginx.org/nginx/ticket/1724
Nginx doesn't sanitize and is inconsistent with multiple, repeated input headers
https://trac.nginx.org/nginx/ticket/1316
$http_ variables only contain the first field-value
https://trac.nginx.org/nginx/ticket/1843
$upstream_http_set_cookie includes only first cookie
https://trac.nginx.org/nginx/ticket/1423
response vary headers not used in the cache key
https://trac.nginx.org/nginx/ticket/485
Multiple WWW-Authenticate headers
The basic idea is that all headers are linked lists now, which makes
it possible to easily concatenate multiple headers without introducing
arrays, as it was previously done with Cookie and X-Forwarded-For request
headers and Cache-Control, Link, and Set-Cookie response headers.
Futher, such approach makes it possible to easily concatenate unknown
headers at runtime, so it makes it possible to properly merge headers
passed to CGI-like backends.
Review and testing appreciated.
--
Maxim Dounin
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