Exception when decoding path parameters containing brackets

[jowerner]

Decoding successfully extracted path parameters sometimes fails with an IllegalArgumentException / URISyntaxException. This happens for path segments containing special characters, brackets in my case.

java.lang.IllegalArgumentException: Illegal character in path at index 7: foo/bar[1].png
    at java.base/java.net.URI.create(URI.java:883)
    at ninja.utils.AbstractContext.getPathParameter(AbstractContext.java:195)
    at ninja.params.ArgumentExtractors$PathParamExtractor.extract(ArgumentExtractors.java:133)
    at ninja.params.ArgumentExtractors$PathParamExtractor.extract(ArgumentExtractors.java:124)
    at ninja.params.ControllerMethodInvoker.invoke(ControllerMethodInvoker.java:70)
    ...
Caused by: java.net.URISyntaxException: Illegal character in path at index 7: foo/bar[1].png
    at java.base/java.net.URI$Parser.fail(URI.java:2913)
    at java.base/java.net.URI$Parser.checkChars(URI.java:3084)
    at java.base/java.net.URI$Parser.parseHierarchical(URI.java:3166)
    at java.base/java.net.URI$Parser.parse(URI.java:3125)
    at java.base/java.net.URI.<init>(URI.java:600)
    at java.base/java.net.URI.create(URI.java:881)
    ... 50 more

To decode a path parameter, Ninja uses the URI class. This class does not accept literal brackets, hence the exception. Browsers, however, don't convert brackets in the path, while other special characters are sent encoded. Seems there is a discrepancy what characters are allowed in a URL.

What do you think about using a path parameter decoder that is less strict and accepts all special characters that are sent literally by browsers? Thanks!