Disable URL decoding in Spring MVC

Question

I have the following endpoint

@RequestMapping("missedcall")
fun missedCall(@RequestParam("v") encryptedValue : String, model: 
ModelMap): String {
    //decrypt encryptedValue here
}

When I execute this endpoint with "http://myurl.com/missedcall?v=this+is+my+encrypted+string", encryptedValue initialized as "this is my encrypted string". I actually want the pluses as they are part of the encryption and I can't decrypt the string without them.

The work around would be URL encode the string back to restore pluses and other special characters, BUT is there a cleaner way? Maybe disabling URL decoding for this particular endpoint?

Note: I can't pass this param in body, it has to be part of the query string. Also this is written in Kotlin, but I am 100% sure Java has similar issues, so don't feel discouraged by Kotlin :).

Sean Patrick Floyd · Accepted Answer · 2018-04-16 21:37:51Z

5

Any web framework will decrypt the query path for you, as that's expected behavior. If that's not what you want, you will have to define a method argument of type HttpServletRequest and parse the query yourself using HttpServletRequest.getQueryString().

answered Apr 16, 2018 at 21:37

Sean Patrick Floyd

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Wheel Builder · Accepted Answer · 2018-04-17 16:11:29Z

0

Thanks to @SeanPatrickFloyd, implemented it as

@RequestMapping("missedcall")
fun missedCall(request: HttpServletRequest, model: ModelMap): String {
    val encodedValue = request.queryString.split("=")[1]
    //decrypt encryptedValue here
}

answered Apr 17, 2018 at 16:11

Wheel Builder

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