Artem Bilan a14514ada0 INT-4462: WebFluxInbound: cope with empty body ...

JIRA: https://jira.spring.io/browse/INT-4462

When the HTTP request body is empty, the `HttpMessageReader` ends up
with the empty `Mono` which can't be evaluated to any reasonable value.

* Add fallback to `requestParams` when `Mono` for body is empty and
also when `payloadExpression` returns null

**Cherry-pick to 5.0.x**

2018-05-07 12:46:08 -04:00

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main

INT-4462: WebFluxInbound: cope with empty body

2018-05-07 12:46:08 -04:00

test

INT-4462: WebFluxInbound: cope with empty body

2018-05-07 12:46:08 -04:00