Postman–Working with data files

Instead of doing a manual cleanup of my local RabbitMQ cluster I decided to use the Management HTTP API and script the whole process.

I decided to use Postman and the collection runner data files support.

Let’s walk through the steps:

• I started by creating a new Collection inside Postman:

• Inside this collection I started adding DELETE requests to different objects(exchanges, queues,…) inside RabbitMQ

• I used variables (recognizable with the double mustaches {{variableName}}) inside the URLs.
• E.g. http://user:pw@localhost:15672/api/exchanges/%2F/{{exchange}}
• These variables should be replaced by values from a JSON data file.
• Create a JSON file containing a list of values. Unfortunately it is not possible to add the data file to your collection. So save it anywhere you want
• Here is how the data file looked like for the above request:

	[
	{"exchange": "MassTransit.Courier.Contracts:RoutingSlip"},
	{"exchange": "MassTransit.Courier.Contracts:RoutingSlipActivityCompleted"},
	{"exchange": "MassTransit.Courier.Contracts:RoutingSlipCompleted"},
	{"exchange": "MassTransit.Scheduling:CancelScheduledMessage"},
	{"exchange": "MassTransit.Scheduling:CancelScheduledRecurringMessage"},
	{"exchange": "MassTransit.Scheduling:ScheduleRecurringMessage"},
	{"exchange": "MassTransit.Scheduling:ScheduleMessage"},
	{"exchange": "MassTransit.Scheduling:ScheduleMessage--Messages:ProcessSampleCommand--"},
	{"exchange": "MassTransit:Fault"},
	{"exchange": "MassTransit:Fault--Messages.Events:OrderCompleted--"},
	{"exchange": "MassTransit:Fault--Messages:ProcessSampleCommand--"},
	{"exchange": "Messages.Commands:HighPriorityCommand"},
	{"exchange": "Messages.Events:CartRemoved"},
	{"exchange": "Messages.Events:CartExpired"},
	{"exchange": "Messages.Events:CartItemAdded"},
	{"exchange": "Messages.Events:IDomainEvent"},
	{"exchange": "Messages.Events:OrderCompleted"},
	{"exchange": "Messages.Events:OrderConfirmedEvent"},
	{"exchange": "Messages.Events:OrderSubmitted"},
	{"exchange": "Messages:ProcessSampleCommand"}
	]

view raw exchanges.json hosted with ❤ by GitHub

• Let’s now try to use the collection runner. Click on the Runner button at the top:

• Select the collection you want to run on the left.

• Also select a data file.
• Click on the big blue run button to execute the requests in the collection. Parameters will be replaced using the values you’ve provided in the data file.