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Add support for TopicAlias in application message builder.

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This commit is contained in:
Christian Kratky
2020-11-09 17:22:32 +01:00
parent eaf1195f95
commit 6c15693456
2 changed files with 18 additions and 8 deletions
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Source/MQTTnet/MqttApplicationMessageBuilder.cs
+7 -2
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@@ -222,9 +222,14 @@ namespace MQTTnet
public MqttApplicationMessage Build()
{
if (string.IsNullOrEmpty(_topic))
if (!_topicAlias.HasValue && string.IsNullOrEmpty(_topic))
{
throw new MqttProtocolViolationException("Topic is not set.");
throw new MqttProtocolViolationException("Topic or TopicAlias is not set.");
}
if (_topicAlias == 0)
{
throw new MqttProtocolViolationException("A Topic Alias of 0 is not permitted. A sender MUST NOT send a PUBLISH packet containing a Topic Alias which has the value 0 [MQTT-3.3.2-8].");
}
var applicationMessage = new MqttApplicationMessage