public WebSocketHandshakeException(HttpResponse<?> response)

Constructs a WebSocketHandshakeException with the given HttpResponse.

public HttpResponse<?> getResponse()

Returns the server's counterpart of the opening handshake.

The value may be unavailable (null) if this exception has been serialized and then deserialized.

public WebSocketHandshakeException initCause(Throwable cause)

Initializes the cause of this throwable to the specified value. (The cause is the throwable that caused this throwable to get thrown.)

This method can be called at most once. It is generally called from within the constructor, or immediately after creating the throwable. If this throwable was created with Throwable(Throwable) or Throwable(String,Throwable), this method cannot be called even once.

An example of using this method on a legacy throwable type without other support for setting the cause is:

 try {
     lowLevelOp();
 } catch (LowLevelException le) {
     throw (HighLevelException)
           new HighLevelException().initCause(le); // Legacy constructor
 }