Varnish在不同的浏览器上表现不同，为什么？

Question

在Firefox上，Varnish正在发挥作用，但在谷歌浏览器上却没有。可能？为什么呢？

Answer 1

另一个可能的原因可能是您在Chrome中有一个会话cookie，导致Varnish将请求传递给后端。

Answer 2

最可能的原因是Accept-Encoding标头的规范化，Firefox和Chrome都发送了不同的标头。将其添加到您的子vcl_recv（）：

if (req.http.Accept-Encoding) {
    if (req.url ~ "\.(jpg|png|gif|gz|tgz|bz2|tbz|mp3|ogg)$") {
        # No point in compressing these
        remove req.http.Accept-Encoding;
    } elsif (req.http.Accept-Encoding ~ "gzip") {
        set req.http.Accept-Encoding = "gzip";
    } elsif (req.http.Accept-Encoding ~ "deflate") {
        set req.http.Accept-Encoding = "deflate";
    } else {
        # unkown algorithm
        remove req.http.Accept-Encoding;
    }
}

这也记录在Varnish manual on the "Vary" header。

中

Answer 3

    if (req.http.Accept-Encoding) {
       if (req.http.Accept-Encoding ~ "gzip") {
           set req.http.Accept-Encoding = "gzip";
       } elsif (req.http.Accept-Encoding ~ "deflate") {
           set req.http.Accept-Encoding = "deflate";
       } else {
           # unknown language. Remove the accept-language header and
           # use the backend default.
           unset req.http.Accept-Encoding;
       }
    }
   //add below condition along with above code in vcl_recv subroutine.
   if(req.http.User-Agent) {
       unset req.http.User-Agent;
   }