我有以下配置:
map $host $variant_a {
default 'a';
}
map $host $variant_b {
default 'b';
}
map $host $variant_c {
default 'c';
}
map $host $variant_d {
default 'd';
}
map $host $variant_default {
default 'default';
}
# a/b testing
split_clients "abtest${remote_addr}${http_user_agent}${date_gmt}" $variant_chosen {
20% $variant_a;
20% $variant_b;
20% $variant_c;
20% $variant_d;
20% $variant_default;
}
server {
# defaults test independent
listen 80;
server_name _;
root /home/vagrant/www;
index index.html;
error_page 404 = 404.html;
error_page 403 = 404.html;
location / {
echo a=$variant_a,variant_chosen=$variant_chosen
}
}
当我对服务器执行查询时:
curl -i http://192.168.33.10/
我可以看到'split_clients'
内的变量从未扩展过。
示例输出:
vagrant@precise32:~/www$ curl -i http://192.168.33.10/
HTTP/1.1 200 OK
Server: nginx/1.1.19
Date: Mon, 04 May 2015 15:46:17 GMT
Content-Type: application/octet-stream
Transfer-Encoding: chunked
Connection: keep-alive
a=a,variant_chosen=$variant_default
任何人都知道为什么变量没有扩展?
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欢呼声 烫发