(1) 能执行purge操作

sub vcl_purge {

​ return (synth(200,”Purged”));

}

(2) 何时执行purge操作

sub vcl_recv {

​ if (req.method == “PURGE”) {

​ return(purge);

​ }

​ …

}

​

添加此类请求的访问控制法则：

acl purgers {

​ “127.0.0.0”/8;

​ “10.1.0.0”/16;

}

sub vcl_recv {

​ if (req.method == “PURGE”) {

​ if (!client.ip ~ purgers) {

​ return(synth(405,”Purging not allowed for ” + client.ip));

​ }

​ return(purge);

​ }

​ …

}