Safety problems

Question

In the registration form I have, I put an ajax call to check if the username is available.

However, I am concerned that this opens up a system for checking the bot for valid usernames.

How can I protect the service from external calls?

thank

Answer 1

How can I protect the service from external calls?

Well ... ANY user trying to register will be an "external call"!

I do not see how verifying a username will pose a security risk. The bot could simply register as fsdjiojiejfiowell as be sure that no one had done this before.

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Answer 2

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