On: Nginx reverse proxies retries PUT/POST/DELETE on r...

[todd17]

Scenario 1:

1. nginx times out while server processes request

2. nginx makes request to second server and second server returns "account already exists"

Scenario 2:

1. nginx times out while server processes request and returns error

2. user attempts to create account again and server returns "account already exists"

[lawpoop → todd17]

What about when an ajax POST adds an item to a shopping cart?

There is no unique identifier in the line item count, and thus no way to determine "account already exists".

Worst case scenario, user gets extra item(s) in their cart, doesn't really look at the totals, and orders, pays for, and receives them.