@Override
    protected void handleInterceptedStream(InterceptedStream<InputStream> stream) {

        // Read the first blob. Note that future blobs will be read in response
        // to received "ack" instructions.
        readNextBlob(stream);

    }
Handles a single "ack" instruction, sending yet more blobs or closing the
stream depending on whether the "ack" indicates success or failure. If no
InputStream is associated with the stream index within the "ack"
instruction, the instruction is ignored.

@param instruction
    The "ack" instruction being handled.
guacamole/src/main/java/org/apache/guacamole/tunnel/InputStreamInterceptingFilter.java