Nginx301重定向该怎么写

Nginx.
原来的URL:
http://www.域名.com/news/aaa.html
http://www.域名.com/product/aaa/bbb/xxx.html
需要把 /news/和/product/这2个目录下的网页重定向到以下URL:
http://www.域名.com/old/news/aaa.html
http://www.域名.com/old/product/aaa/bbb/xxx.html

---

rewrite ^/(news|product)/(.*)$ /old/$1/$2 permanent last;

放server块里。随手写的，没测试。

---

server {
    server_name www.xxx.com xxx.com;
    if ($host != 'www.xxx.com' ) {
        rewrite ^/(.*)$ http://www.xxx.com/$1 permanent;
    }
}

关键在 permanent

子目录跳转：

location ~* ^/news/ {
    rewrite ^/news/(.*)$ http://www.xxx.com/old/news/$1 permanent;
}

---

rewrite