java - Prevent concatenation of parameters if sent twice

I have some rest API

@GetMapping(value = "/getSomething")
public String getSomething(@RequestParam(value = "name") String name)

Caller to the API can provide multiple instances of the name parameter

/getSomething?name=something&name=somethingElse

In the API code the name variable will be received as "something,somethingElse"

Is there a way yo prevent this behavior ?

accept only one "name" parameter?

or return "400" "bad request" for such a case?

Thanks

asked Mar 20, 2022 at 13:12

Maayan Hope

1,57217 silver badges34 bronze badges

I am just guessing here, but I think it is Http protocol issue rather then spring boot. So, I would try to see if you have ',' in your input - fail it. but then what if ',' is actually part of the input...
– Michael Gantman
Commented Mar 20, 2022 at 13:54
well as you said, the input may contain ","
– Maayan Hope
Commented Mar 20, 2022 at 15:00
3

Are you looking for: stackoverflow.com/questions/22817430/… ?
– VoiceOfUnreason
Commented Mar 21, 2022 at 3:44
For permanent solution, refere as @VoiceOfUnreason mentioned, but to stop the bleeding you can do something like this -> if(Arrays.asList(name.split(",")).size()>1) { throw exception }
– Harsh
Commented Apr 8, 2022 at 10:29

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Prevent concatenation of parameters if sent twice