Publishing to the default rabbitmq exchange using the http api

api http rabbitmq amqp
Tom Turner picture Tom Turner · Sep 9, 2015 · Viewed 13k times · Source

So I am using rabbitmqs http api to do some very basic actions in rabbit. It works great in most situations but I am having an issue figuring out how to use it to publish a message to the default rabbitmq exchange. This exchange is always present, cannot be deleted and has a binding to every queue with a routing key equal to the queue name.

My problem is that this queue does not have a name, or rather, it's name is an empty string "". And the URL I have to use to publish this message with the HTTP api includes the name of the exchange.

http://localhost:15672/api/exchanges/vhost/name/publish (Source: http://hg.rabbitmq.com/rabbitmq-management/raw-file/rabbitmq_v3_3_4/priv/www/api/index.html)

The same article mentions that in order to use the default vhost which has a name of "/", you must use %2f in place of the vhost name. This makes me think there should be a similar way to represent the deafault exchange in the url.

I tried a few different things and none of them worked:

/api/exchanges/vhost//publish
/api/exchanges/vhost/""/publish
/api/exchanges/vhost/''/publish
/api/exchanges/vhost/ /publish
/api/exchanges/vhost/%00/publish

I'm sure I can't be the only person that has run into this issue. any help would be much appreciated.

thanks, Tom

Answer

Gabriele Santomaggio picture Gabriele Santomaggio · Sep 9, 2015

This is the way to publish a message to amq.default:

http://localhost:15672/api/exchanges/%2f/amq.default/publish

with this body

{"properties":{},
 "routing_key":"queue_test",
 "payload":"message test ",
 "payload_encoding":"string"}

routing_key is the queue where you will publish the message.

Following an example using a chrome plug-in:

enter image description here

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