Decode AMQP over websocket

edit

You might be able to do it with a lua plugin to connect the pieces.
Can you share a capture file?

Ask: MQTT over Websocket?
Old Ask: Wireshark STOMP protocol dissector

The STOMP lua plugin and a sample capture are available on the Wiki: stomp.lua

This plugin dissects STOMP protocol packets, both over raw TCP and over HTTP/Websocket. The plugin this was based on is hosted on github, but the file in this wiki is newer, and can do things the one on github cannot; it was based on an answer to a question on ask.wireshark.org.