1

I'm currently running Magento 1.7 with Varnish Turpentine.

I have noticed a strange behavior on cached content - Varnish returns same content for mobile and tablet(iPad), although in Magento back-end I have set design exceptions for matched expressions (iPad should use default, mobiles use mobi) and it works like a charm until varnish default.vcl is applied.

After checking around I found out that varnish use device detection and normalizes user-agent as per following:

if (req.http.User-Agent ~ "iP(?:hone|ad|od)|BlackBerry|Palm|Googlebot-Mobile|Mobile|mobile|mobi|Windows Mobile|Safari Mobile|Android|Opera (?:Mini|Mobi)") {
set req.http.X-Normalized-User-Agent = "mobile";

Well, fair enough... clearly mobiles and tablets will return same cache hit as both are normalized as mobile ... lets separate iPad I though

if (req.http.User-Agent ~ "iP(?:hone|od)|BlackBerry|Palm|Googlebot-Mobile|Mobile|mobile|mobi|Windows Mobile|Safari Mobile|Android|Opera (?:Mini|Mobi)") {
set req.http.X-Normalized-User-Agent = "mobile";
else if (req.http.User-Agent ~ "iPad") {
set req.http.X-Normalized-User-Agent = "ipad";

A big surprise after this change was that varnish still returns same cached content.

I have tried to use different varnish device-detects but all unfortunately failed.

Have anybody has a smallest clue what could be the issue?

| improve this question | |
  • After you made the change to separate iPad, did you apply those VCL changes to the running instance of Varnish? – Aric Watson Mar 31 '16 at 15:48
  • Hi, thank you for your time helping to sort this out. Yes, I did apply changes to running instance, also I tried to restart varnish on the server and applied changes on running instance afterwards but both returned same issue. – Aivis Zvezdovs Mar 31 '16 at 18:33
  • Ok, perhaps try turning off the Normalize User-Agent option in Turpentine as a test and see if that works? – Aric Watson Mar 31 '16 at 18:55
  • Hi, once Normalize User-Agent option is turned off, cache serves one content for all devices (even if I apply new config). Also I noticed that if Normalize User-Agent option is on and I delete all entries regarding device detection and apply it, cache still serves different content for mobile agent and pc agent. – Aivis Zvezdovs Apr 1 '16 at 9:45
1

Without hashing, it won't change the content, please check below, it will help

sub vcl_recv {
    if (req.http.User-Agent ~ "iP(?:hone|od)|BlackBerry|Palm|Googlebot-Mobile|Mobile|mobile|mobi|Windows Mobile|Safari Mobile|Android|Opera (?:Mini|Mobi)") {
        set req.http.X-Normalized-User-Agent = "mobile";
    } 
    else if (req.http.User-Agent ~ "iPad") {
       set req.http.X-Normalized-User-Agent = "ipad";
    else {
       set req.http.X-Device = "other";
    }
}

sub vcl_hash {
    if (req.X-Normalized-User-Agent) {
       hash_data(req.X-Normalized-User-Agent);
    }
}

sub vcl_deliver {    
    set resp.http.X-Varnish-Device = req.X-Normalized-User-Agent;
}

Will definitely recommend to use devicedetect.vcl instead of relying on user agent.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.