I use Google Analytics Enhanced E-commerce for some shops. On catalog page I have many products and I need to track their impressions. I do not track each product one-by-one, cause it will cause many requests, instead I add all of them through .ec:addImpression and then track entire pack by sending single pageview.
And everything was going well until I faced a problem, that on page with too many products requests to collect stopped working with no error. I've installed analytics debugger for Chrome and found out, that I've exceeded a payload limit, which is set to 8 KB (according to official documentation):
payload_data – The BODY of the post request. The body must include exactly 1 URI encoded payload and must be no longer than 8192 bytes.
And this is fine, but here's my question: is there any way to overcome this restriction? Maybe some option or method, that will allow not to bother about payload size and it will be automatically split into proper chunks? Or at least a method to get a payload in run-time to check its size. I run through documentation and found nothing.
Note: currently I manually track a "safe" number (which was discovered by experience) of products added by addImpression and then send them by non-interaction pageview hit. Of course, this solves my problem, by I want to know if there's a built-in solution.
Create a product data import that matches your product ids to product to product attributes (name, category, price etc). Wait until the data is processed, then change your tracking code so that only product ids are sent.
That should shrink down the request body enough to send all products, and the ids will be joined with the imported data when the incoming hits are processed.
Imported data is not applied retroactively, so it'S important that you do the data import first.