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$upstream_http_* variables exist but do not seem to be readable

February 01, 2013 08:59AM
Hi,

I'm currently using OpenResty, and one of the things I am trying to do is have the backend send a specific header, and if that header is present, run a body_filter_by_lua call on the output. However, while I can use the $upstream_http_* vars for populating (i.e. I can go add_header SomeHeader $upstream_http_foo, and if Foo has been sent see SomeHeader: FooVar in the output. However, all tests for them seem to break.

Example:

location @backend {
expires off;
proxy_pass http://_varnish;
set $test $upstream_http_csrf; # definitely exists, I can see it in the response headers
add_header SomeHeader $upstream_http_csrf; # And I can read it, but....
if ($upstream_http_csrf = 1) { # doesn't matter if it's 1, "one" ~* "one", anything....
# this block never gets called
}
add_header someOtherHeader $test; # Not present in output as empty
set_by_lua $use_token
'
if not ngx.var.sent_http_csrf == "" then
return ngx.var.upstream_http_csrf
end
return "baz"
'; # Always return 'baz'
add_header WIllThisWork $use_token; # Again, empty
}
SubjectAuthorPosted

$upstream_http_* variables exist but do not seem to be readable

shrikehFebruary 01, 2013 08:59AM

Re: $upstream_http_* variables exist but do not seem to be readable

Maxim DouninFebruary 01, 2013 09:50AM

Re: $upstream_http_* variables exist but do not seem to be readable

agentzhFebruary 01, 2013 03:28PM

Re: $upstream_http_* variables exist but do not seem to be readable

shrikehFebruary 04, 2013 03:12AM

Re: $upstream_http_* variables exist but do not seem to be readable

shrikehFebruary 04, 2013 06:09AM

Re: $upstream_http_* variables exist but do not seem to be readable

shrikehFebruary 08, 2013 11:56AM



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