Varnish狀態(tài)引擎說明：
sub vcl_recv {
? ? if (req.method == "PRI") {
/* We do not support SPDY or HTTP/2.0 */
? ? ? ? return (synth(405));
? ? }
? ? if (req.method != "GET" &&
? ? ? req.method != "HEAD" &&
? ? ? req.method != "PUT" &&
? ? ? req.method != "POST" &&
? ? ? req.method != "TRACE" &&
? ? ? req.method != "OPTIONS" &&
? ? ? req.method != "DELETE") {
? ? ? ? /* Non-RFC2616 or CONNECT which is weird. */
? ? ? ? return (pipe);
? ? }
? ? if (req.url ~ "^(.*)\.(jpg|png|gif|jpeg|flv|bmp|gz|tgz|bz2|tbz|js|css|html|htm)($|\?)") {
? ? ? ? unset req.http.cookie;
? ? }
? ? if (req.url ~ "^(.*)\.(php|jsp|do|aspx|asmx|ashx)($|.*)") {?
? ? ? ? return (pass);
? ? }
? ? if (req.method != "GET" && req.method != "HEAD") {
? ? ? ? /* We only deal with GET and HEAD by default */
? ? ? ? return (pass);
? ? }
? ? if (req.http.Authorization || req.http.Cookie) {
? ? ? ? /* Not cacheable by default */
? ? ? ? return (pass);
? ? }
? ? return (hash);
}
sub vcl_backend_response {
? ? if (bereq.url ~ "^(.*)\.(pdf|xls|ppt|doc|docx|xlsx|pptx|chm|rar|zip)($|\?)") {? ?
? ? ? ? unset beresp.http.Set-Cookie;? ?
? ? ? ? set beresp.ttl = 2h;?
? ? ? ? return (deliver);?
? ? } else if(bereq.url ~ "^(.*)\.(bmp|jpeg|jpg|png|gif|svg|png|ico|txt|css|js|html|htm)($|\?)") {?
? ? ? ? unset beresp.http.Set-Cookie;?
? ? ? ? set beresp.ttl = 2h;?
? ? ? ? return (deliver);?
? ? } else if(bereq.url ~ "^(.*)\.(mp3|wma|mp4|rmvb|ogg|mov|avi|wmv|mpeg|mpg|dat|3pg|swf|flv|asf)($|\?)") {? ?
? ? ? ? unset beresp.http.Set-Cookie;?
? ? ? ? set beresp.ttl = 2h;?
? ? ? ? return (deliver);?
? ? }? ?
? ? if (beresp.ttl <= 0s ||
? ? ? beresp.http.Set-Cookie ||
? ? ? beresp.http.Surrogate-control ~ "no-store" ||
? ? ? (!beresp.http.Surrogate-Control &&
? ? ? ? beresp.http.Cache-Control ~ "no-cache|no-store|private") ||
? ? ? beresp.http.Vary == "*") {
? ? ? ? /*
? ? ? ? * Mark as "Hit-For-Pass" for the next 2 minutes
? ? ? ? */
? ? ? ? set beresp.ttl = 120s;
? ? ? ? set beresp.uncacheable = true;
? ? }
? ? return (deliver);
}
參考文檔：
? ??https://varnish-cache.org/trac/wiki/VCLExamples
? ??https://varnish-cache.org/docs/4.1/reference/index.html
? ??https://varnish-cache.org/docs/4.1/users-guide/vcl-built-in-subs.html#vcl-built-in-subs
