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A comment on You know how HTTP GET requests are meant to be idempotent?. Parent comment

Re:You know how HTTP GET requests are meant to be idempotent? by jimktrains2 on Tuesday May 01, 2018 @08:33AM (#16966455)
And when a user receives an email saying they've been unsubscribed because an automated system prefetched the link, they won't be concerned or worried or confused at all. (Especially when this happens _every time_.
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Re:You know how HTTP GET requests are meant to be idempotent? by tedunangst on Tuesday May 01, 2018 @03:57PM (#16970877)
And then the automated system clicks the undo link... Problem solved!
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Re:You know how HTTP GET requests are meant to be idempotent? by simcop2387 on Wednesday May 02, 2018 @12:47AM (#16974132)
Which fires off a new email thanking them for re-subscribing.

Soon your inbox is full.

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