@Override
public Response serve(final IHTTPSession session) {
Map<String, String> headers = session.getHeaders();
if (isWebsocketRequested(session)) {
if (!NanoWebSocketServer.HEADER_WEBSOCKET_VERSION_VALUE.equalsIgnoreCase(
headers.get(NanoWebSocketServer.HEADER_WEBSOCKET_VERSION))) {
return newFixedLengthResponse(
Response.Status.BAD_REQUEST,
NanoHTTPD.MIME_PLAINTEXT,
"Invalid Websocket-Version "
+ headers.get(NanoWebSocketServer.HEADER_WEBSOCKET_VERSION));
}
if (!headers.containsKey(NanoWebSocketServer.HEADER_WEBSOCKET_KEY)) {
return newFixedLengthResponse(
Response.Status.BAD_REQUEST, NanoHTTPD.MIME_PLAINTEXT, "Missing Websocket-Key");
}
WebSocket webSocket = openWebSocket(session);
Response handshakeResponse = webSocket.getHandshakeResponse();
try {
handshakeResponse.addHeader(
NanoWebSocketServer.HEADER_WEBSOCKET_ACCEPT,
makeAcceptKey(headers.get(NanoWebSocketServer.HEADER_WEBSOCKET_KEY)));
} catch (NoSuchAlgorithmException e) {
return newFixedLengthResponse(
Response.Status.INTERNAL_ERROR,
NanoHTTPD.MIME_PLAINTEXT,
"The SHA-1 Algorithm required for websockets is not available on the server.");
}
if (headers.containsKey(NanoWebSocketServer.HEADER_WEBSOCKET_PROTOCOL)) {
handshakeResponse.addHeader(
NanoWebSocketServer.HEADER_WEBSOCKET_PROTOCOL,
headers.get(NanoWebSocketServer.HEADER_WEBSOCKET_PROTOCOL).split(",")[0]);
}
return handshakeResponse;
} else {
return super.serve(session);
}
}
