Q:

Publishing to the default rabbitmq exchange using the http api

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

A:

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:

