avoid large http header data copies in jaxrs

[alalag1]

Expected behavior

avoid large http header data copies in jaxrs

Actual behavior

http headers are copied and converted between restlight and jaxrs

esa-restlight/restlight-jaxrs-provider/src/main/java/io/esastack/restlight/jaxrs/util/JaxrsUtils.java

Lines 108 to 132 in 4f2cb40

	public static MultivaluedMap<String, Object> convertToMap(HttpHeaders headers) {
	MultivaluedMap<String, Object> dest = new MultivaluedHashMap<>();
	if (headers == null) {
	return dest;
	}
	for (String name : headers.names()) {
	dest.addAll(name, new ArrayList<>(headers.getAll(name)));
	}
	return dest;
	}
	public static void convertThenAddToHeaders(MultivaluedMap<String, Object> values, HttpHeaders headers) {
	if (values == null || values.isEmpty()) {
	return;
	}
	headers.clear();
	for (Map.Entry<String, List<Object>> entry : values.entrySet()) {
	List<Object> value = entry.getValue();
	if (value == null || value.isEmpty()) {
	continue;
	}
	headers.add(entry.getKey(), value.stream().map(JaxrsUtils::toString)
	.collect(Collectors.toList()));
	}
	}

Steps to reproduce

Env

• Restlight version: 1.0.0-SNAPSHOT
• JVM version:
• OS: