@OnMessage
public String getHeaders(Session session, String headerKey) {
StringBuilder response = new StringBuilder();
response.append("Request Header [").append(headerKey).append("]: ");
@SuppressWarnings("unchecked")
Map<String, List<String>> headers =
(Map<String, List<String>>) session.getUserProperties().get("request-headers");
if (headers == null) {
response.append("<no headers found in session.getUserProperties()>");
} else {
List<String> values = headers.get(headerKey);
if (values == null) {
response.append("<header not found>");
} else {
response.append(QuoteUtil.join(values, ","));
}
}
return response.toString();
}