Lambda proxy is encoding plus character as a space for query parameters

[AndrejMitrovic]

Expected Behavior

This is a similar bug to #656.

When setting up a lambda proxy, query parameters end up having + converted to a space ( ). This is a problem when hooking up a Lambda to the AWS API Gateway as the gateway auto-decodes query parameters before passing them to the Lambda. So for example, foo%2Bbar will get decoded to foo+bar, passed on to the Lambda, but then Micronaut will then convert this into the value foo bar.

Actual Behaviour

Expected + to not be auto-converted to space ( ) for query parameters.

Steps To Reproduce

Clone https://github.com/AndrejMitrovic/micronaut-plus-bug-demo
And run: gradle test -i
The expected output is: Query parameter is: foo+bar
But the actual output is: Query parameter is: foo bar

Environment Information

OS: Windows 10
JDK: temurin-11

Example Application

https://github.com/AndrejMitrovic/micronaut-plus-bug-demo

Version

Micronaut v2.1.2

[AndrejMitrovic]

It looks like this bug only affects v2.x of Micronaut. I've tested it with v3.7.4 and the output is as expected.

[AndrejMitrovic]

Is v2.x still maintained? Or is our only option to upgrade to v3.x?