add IntoResponse impl on custom Json extractor example #2191
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Motivation
The current custom-extractor-error/derive_from_requst example does not allow the wrapped
Json
extractor to be used as a response.Solution
Adding an impl for
IntoResponse
for the custom extractor provides the same ergonomics as the originalaxum::Json
.NOTE: the example now also echoes back the parsed json request body (which it wasn't before and therefore the code did compile without the
impl
)edit(jplatte): Closes #2186.