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MQTT node better check for topic existing
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@ -95,7 +95,7 @@ module.exports = function(RED) {
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if (node.topic) {
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msg.topic = node.topic;
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}
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if (typeof msg.topic === "string") { // topic must be a string
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if ((msg.hasOwnProperty("topic")) && (typeof msg.topic === "string") && (msg.topic !== "")) { // topic must exist
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this.client.publish(msg); // send the message
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}
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else { node.warn("Invalid topic specified"); }
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