content_by_lua not reading/printing header values

[vamshi]

I found the issue(s). I am not sure why the error log did not have any logs
after the lua thread got launched.

Here is the updated /etc/nginx/nginx.conf

        location / {
            set $dbKey "";

            content_by_lua '
                local a = ngx.var.http_cookie
                local b = ngx.var.http_my_custom_auth

                print(a)
                print(b)

                if ngx.var.http_my_custom_auth ~= nil then
                    local res = ngx.location.capture("/postgresquery",
                                                    { args = {dbKey = b } }
                                                    )
                    print(res.status)
                    print(QueryResult)
                    if res.status == 200 then
                        return ngx.exec("@final")
                    else
                        ngx.status = 403
                        return
                    end
                elseif ngx.var.http_cookie ~= nil then
                    return ngx.exec("@final")
                else
                    ngx.status = 444
                    return
                end
            ';
        }

        location /postgresquery {
            internal;

            postgres_pass testdb;
            postgres_escape $escaped_dbKey $arg_dbKey;
            postgres_query "select id from testtable where key =
$escaped_dbKey;";
            postgres_output value;
        }

However, as you can see, I had to delete print(res.headers) and
print(res.body), since lua was complaining that it expects a single value,
but it got a table

-Vamshi

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,251127,251129#msg-251129