Return JSON response when request body is invalid JSON

[JakeUrban]

What version are you using?

Not sure (from a partner)

What did you do?

Sent an RPC request with an invalid JSON body.

curl https://soroban-testnet.stellar.org:443 
  -H 'Content-Type: application/json' 
  -d '[{"jsonrpc": "2.0", "method": "getHealth", "id": "1234567890"},{"jsonrpc": "2.0", "method": "getTransaction", "id": "1234567891","params":{"6bc97bddc21811c626839baf4ab574f4f9f7ddbebb44d286ae504396d4e752da"}}]'

What did you expect to see?

A valid JSON response body.

What did you see instead?

Got back a non-JSON response body.

[-32700] invalid request value

[2opremio]

I am pretty sure this behavior comes from the upstream library we are using: https://github.com/creachadair/jrpc2 , but we should confirm.

Note, however, that the client should be anyhow prepared for non-JSON-encoded response bodies in case of errors (e.g. an intermediary proxy could be erroring and there are no guarantees on the format).