Properly handle opaque origin ("null") in CORS processing #8537
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Description
Resolves #8497
If a browser (or other client) that can participate in CORS detects an untrusted origin, it can/might/must send the "opaque" origin (seemingly universally the string
null
) as theOrigin
header.The Helidon CORS logic did not handle this case. "Usual" origins have
scheme://host[:port]
so have at least one colon which terminates the scheme. The code expected this butnull
has no colon.Includes a new test.
Documentation
No impact.