JSON.parse() just greps the first json object in given source-string and returns.

[fkluthe]

See https://github.com/grails-plugins/grails-plugin-converters/blob/master/src/main/groovy/grails/converters/JSON.java#L249
and final Object value = new JSONTokener(source).nextValue();

Eg:

        def s = '{"foo":"bar"}{"baz":true}'
        def json = JSON.parse(s)
        json.toString() == '{"foo":"bar"}'

I find this behavior confusing, i was expecting rather a ConverterException than a silent ignore.

A situation where this can get nasty, is in integration specs when you do something like json = JSON.parse(controller.response.contentAsString as String) and in the related controller, more then one response was rendered like render(contentType: 'application/json', text: someJson.toString()) (by accident, eg missing return after render)

[jameskleeh]

The converters API is deprecated in favor of JSON views. That means that in general we won't be making changes to this library

[fkluthe]

Ok, too bad, but fair enough.

Any recommendation how to validate a JSON string with Groovy?