How to send JSON payload to RabbitMQ using the web plugin?

Question

I have a RabbitMQ 3.4.2 instance with a web management plugin installed.

When I push to the message {'operationId': 194} to the queue using Python's kombu queue package, the message is read on the other end as a dictionary.

However, when I send the message using the web console:

I get the following error on the receiving end:

operation_id = payload['operationId']
TypeError: string indices must be integers

I have tried adding a content-type header and property, with no success.

Since the reader code is the same, it means that the web sender does not mark the sent message as a JSON / dictionary payload, and therefore it is read as a string on the other end.

Any idea how to mark a message as a JSON message using the RabbitMQ web console?

Answer 1

I had to use content_type instead of content-type (an underscore instead of a hyphen).

This is a pretty questionable design decision, because the standard everybody knows is content-type.