Comment by james2doyle
2 years ago
Fantastic article. Really easy to understand.
Side note: this is actually a great advertisement for server side rendering! If they didn't do all this client side rendering, exposing data in JSON APIs, then I doubt this reverse engineering would have been possible.
Except then I'd need to have a good data connection at the venue, and the odds of that are infinitesimally small.
I see what you mean. The barcode wouldn't work offline.
It seems like that didn't matter at the venue though? The spotty internet connection not allowing the code to load was the first part of the article wasn't it?
The article goes into that. If you open up the app ahead of time and download the ticket, it gets enough information to re-generate the barcode every 15 minutes. It's only a problem if you don't go into the app and fetch the data ahead of time.