Examples with DecoderException com.swiftmq.impl.mqtt.v311.netty.handler.codec.DecoderException used on opensource projects

Example 1 with DecoderException

use of com.swiftmq.impl.mqtt.v311.netty.handler.codec.DecoderException in project swiftmq-ce by iitsoftware.

the class MqttEncoder method encodeConnectMessage.

private static com.swiftmq.impl.mqtt.v311.netty.buffer.ByteBuf encodeConnectMessage(MqttConnectMessage message) {
    int payloadBufferSize = 0;
    MqttFixedHeader mqttFixedHeader = message.fixedHeader();
    MqttConnectVariableHeader variableHeader = message.variableHeader();
    MqttConnectPayload payload = message.payload();
    MqttVersion mqttVersion = MqttVersion.fromProtocolNameAndLevel(variableHeader.name(), (byte) variableHeader.version());
    // as MQTT 3.1 & 3.1.1 spec, If the User Name Flag is set to 0, the Password Flag MUST be set to 0
    if (!variableHeader.hasUserName() && variableHeader.hasPassword()) {
        throw new DecoderException("Without a username, the password MUST be not set");
    }
    // Client id
    String clientIdentifier = payload.clientIdentifier();
    if (!isValidClientId(mqttVersion, clientIdentifier)) {
        throw new MqttIdentifierRejectedException("invalid clientIdentifier: " + clientIdentifier);
    }
    byte[] clientIdentifierBytes = encodeStringUtf8(clientIdentifier);
    payloadBufferSize += 2 + clientIdentifierBytes.length;
    // Will topic and message
    String willTopic = payload.willTopic();
    byte[] willTopicBytes = willTopic != null ? encodeStringUtf8(willTopic) : com.swiftmq.impl.mqtt.v311.netty.util.internal.EmptyArrays.EMPTY_BYTES;
    byte[] willMessage = payload.willMessageInBytes();
    byte[] willMessageBytes = willMessage != null ? willMessage : com.swiftmq.impl.mqtt.v311.netty.util.internal.EmptyArrays.EMPTY_BYTES;
    if (variableHeader.isWillFlag()) {
        payloadBufferSize += 2 + willTopicBytes.length;
        payloadBufferSize += 2 + willMessageBytes.length;
    }
    String userName = payload.userName();
    byte[] userNameBytes = userName != null ? encodeStringUtf8(userName) : com.swiftmq.impl.mqtt.v311.netty.util.internal.EmptyArrays.EMPTY_BYTES;
    if (variableHeader.hasUserName()) {
        payloadBufferSize += 2 + userNameBytes.length;
    }
    byte[] password = payload.passwordInBytes();
    byte[] passwordBytes = password != null ? password : EmptyArrays.EMPTY_BYTES;
    if (variableHeader.hasPassword()) {
        payloadBufferSize += 2 + passwordBytes.length;
    }
    // Fixed header
    byte[] protocolNameBytes = mqttVersion.protocolNameBytes();
    int variableHeaderBufferSize = 2 + protocolNameBytes.length + 4;
    int variablePartSize = variableHeaderBufferSize + payloadBufferSize;
    int fixedHeaderBufferSize = 1 + getVariableLengthInt(variablePartSize);
    com.swiftmq.impl.mqtt.v311.netty.buffer.ByteBuf buf = new com.swiftmq.impl.mqtt.v311.netty.buffer.ByteBuf(fixedHeaderBufferSize + variablePartSize);
    buf.writeByte(getFixedHeaderByte1(mqttFixedHeader));
    writeVariableLengthInt(buf, variablePartSize);
    buf.writeShort(protocolNameBytes.length);
    buf.writeBytes(protocolNameBytes);
    buf.writeByte(variableHeader.version());
    buf.writeByte(getConnVariableHeaderFlag(variableHeader));
    buf.writeShort(variableHeader.keepAliveTimeSeconds());
    // Payload
    buf.writeShort(clientIdentifierBytes.length);
    buf.writeBytes(clientIdentifierBytes, 0, clientIdentifierBytes.length);
    if (variableHeader.isWillFlag()) {
        buf.writeShort(willTopicBytes.length);
        buf.writeBytes(willTopicBytes, 0, willTopicBytes.length);
        buf.writeShort(willMessageBytes.length);
        buf.writeBytes(willMessageBytes, 0, willMessageBytes.length);
    }
    if (variableHeader.hasUserName()) {
        buf.writeShort(userNameBytes.length);
        buf.writeBytes(userNameBytes, 0, userNameBytes.length);
    }
    if (variableHeader.hasPassword()) {
        buf.writeShort(passwordBytes.length);
        buf.writeBytes(passwordBytes, 0, passwordBytes.length);
    }
    return buf;
}