Still issue with add to cart - the second time it works

[musab1]

Hi all

I've read all the READMEs and all the posts in the other issues (and tryed/implemented everything out).

I have the problem (since this form_key disaster) that the add to cart still doesnt work.

The first time i try to add something to the card it shows an empty cart - and the EXTERNAL_NO_CACHE cookie get set (and then afterwards it works, becouse
its bypassing Varnish becouse of the cookie).

I can not figure out what the problem is becouse the PAGECACHE_FORMKEY cookie is getting set right, and the html sourcecode shows the same key.
so its not like this esi tags didnt get replaced.

[musab1]

a small Update: when i set the external_no_cache cookie manualy, it still doesnt work.
so it must be something else - related to this form_keys or whatever.

[Guard1an]

Was having the same issue, but it disappeared after I removed tricks I've done with cookies in default.vcl.
Check whether PAGECACHE_FORMKEY cookie is really passed to backend (log cookies in checkout/cart/add controller action)

BTW: I found out that Varnish relies on Vary: User-Agent headers so removing them will make your caching proxy not to clone cache of the same content for different browsers.

Try to enable module debug option and check X-Cache* headers in different browsers. After baning the cache and accessing the same url from different browsers you will see 0 hits and X-Cache:MISS. That happens because Varnish relies on Vary: User-Agent header sent by Magento. If your application doesn't rely on User-Agent (content is the same on all devices and depends on URL or session only) you can solve User-Agent issue by adding the following lines to sub vcl_recv of default.vcl

    if (beresp.http.Vary ~ "User-Agent") {
        set beresp.http.Vary = regsub(beresp.http.Vary, ",? *User-Agent *", "");
        set beresp.http.Vary = regsub(beresp.http.Vary, "^, *", "");
        if (beresp.http.Vary == "") {
            unset beresp.http.Vary;
        }
    }

P.S.: I removed my previous concerns regarding Cookies finding them wrong. default.vcl provided with VarnishCache module makes Varnish to cache content even if Cookie request header is present.

Sincerely yours,
Andrew Storozhev

[Emulator000]

Hi @Guard1an, could you provide more information about this approach? I'm experiencing the same annoying issue without have found a solution yet! Thank you very much!

[phoenix-bjoern]

Make sure you've disabled "Browser Capability Check" for cookies in the Magento configuration (General/Web).

[Emulator000]

Thank you for you reply @phoenix-bjoern, anyway I can't find this exact option, what I've on the backend is:

Thanks!

[phoenix-bjoern]

It is "Redirect to CMS-page if Cookies are Disabled".

[Emulator000]

Thanks @phoenix-bjoern, I'm just making some test and I will let you know.

[Emulator000]

I can confirm that the suggested option by @phoenix-bjoern resolve this issue.