Java APIs are not handling headers in a case insensitive way

[marcospereira]

API

Java

Expected Behavior

When adding headers like:

Map<String, List<String>> headers = new HashMap<>();
headers.put("key", Collections.singletonList("a"));
headers.put("KEY", Collections.singletonList("b"));
ws.url("http://example.com").setHeaders(headers);

Both "a" and "b" must be returned when calling getHeaderValues("key").

The same should apply to response headers.

Actual Behavior

Only "b" is present when calling getHeaderValues("key").