STOMP with custom properties in Lua

I am trying to put two custom properties in a STOMP message header when publishing a topic message so that a subscriber can filter messages. Here are two frames that I send to ActiveMQ 5.14 to connect and publish:

CONNECT
login: myUserName
passcode: myPassword

Note: Actual string is CONNECT\nlogin: myUserName\npasscode: myPassword.

and

SEND
destination:/topic/myTopic

myTopicMessage

Note: Actual string is SEND\ndestination:/topic/myTopic\n\nmyTopicMessage.

How am I supposed to add the following two pairs of properties to above strings?

package_code = ''
whse_code = 'MyWarehouse'

BTW, I am using lua to implement this.

Solution

You can add the properties to your SEND frame with the same syntax used by destination, e.g.:

SEND
destination:/topic/myTopic
package_code:MyPackageCode
whse_code:MyWarehouse

myTopicMessage^@

If package_code (or any other header) is blank simply don't set it.

A few other details are worth noting:

Be sure to follow the body of the message with the NULL octet as noted in the "STOMP Frames" section of the STOMP 1.2 spec. The example above uses ^@ (i.e. control-@ in ASCII) to represent the NULL octet.
SEND frames should include a content-length header and a content-type header if a body is present as noted in the "SEND" section of the STOMP 1.2 spec.

Troubleshooting:

You can enable STOMP protocol tracing with the following steps:

ActiveMQ 5.x: Set trace=true on the STOMP transportConnector, e.g.: <transportConnector name="stomp" uri="stomp://localhost:61613?trace=true"/>. Then set the org.apache.activemq.transport.stomp.StompIO logger to TRACE in conf/log4j.properties
ActiveMQ Artemis: Set the logger org.apache.activemq.artemis.core.protocol.stomp.StompConnection to DEBUG in etc/logging.properties.