I'm populating an API like samy's evercookie. Currently my own API uses the following methods for storing cookies in the client's browser:
- Standard HTTP cookie
- HTML5 session storage
- HTML5 local storage
- HTML5 Web SQL database
- HTML5 IndexedDB
When it comes to implementing Web SQL database, I referenced (quite carefully) from samy's github repository and some other resources. My Web SQL database works well with the initializing, adding or removing data tasks.
But one thing that make me confuse is that although my implementation of mine and samy's evercookie on Web SQL database is nearly the same, when I use Google Chrome to Clear browsing data (all of them), the results are different (I checked them by go to Chrome Developer Tools > Resources tab > Web SQL):
- On my site, the Web SQL database is totally gone!
- On samy's site, the Web SQL still there! This is one of the reason why the cookie on samy's page can recover on the next page load.
I read samy's evercookie code carefully and the Web SQL implementation are almost the same (this is my code), so I completely have no idea why the Web SQL data on his page doesn't get deleted when I Clear browsing data.
I've been stuck at this for hours, so I really hope you guys can help ! Thanks so much in advanced !
