The print-on-demand service that I’ve chosen for my book has a fairly nice web user interface with lots of Ajax code. Generally, that web application is one of the best aspects of doing business with them. That’s why I was surprised to find a rather amateurish flaw in their shopping cart.
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Comments
senfo replied ago:
A better solution would be to maintain an order "state", which would prevent the same order from being processed twice. Even with all of the improvements that the Internet has gotten over the past few years, packets do still get lost, so we would never want an order to get lost simply because the packet was lost and the user couldn't resubmit the order because the button was disabled.
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