In this post, we will examine using Fiddler to send requests and receive responses from an ASP.NET Web API.
I have a Web API sample that looks like the following:
There are different HTTP verbs, including:
- GET
- PUT
- POST
- DELETE
The Customers API is very simple – it integrates with a SQL Server table called Customers with 2 fields – CustomerId and CustomerName, with the data:
Start Fiddler. We will filter the Fiddler traffic to only show Intranet Hosts, as we are running this test on an intranet:
If we view http://localhost:31404/api/Customers we can see all (2) customers have been returned:
We can get one Customer with the request /api/Customers/1:
We can create our own requests using Fiddler by clicking on the Composer tab:
If we want to send the same HTTP GET request, we can enter our URL http://localhost:31404/api/Customers/1 and GET, then Execute:
We can see the raw request and response as well:
From our API, we have the POST URL as api/Customers and the Body parameters:
Our header will look like this:
User-Agent: Fiddler Host: localhost:31404 Content-Length: 49 Content-Type: application/json; charset=utf-8
Note the Content-Type line.
We will supply these parameters to our POST request in the Body. When we execute this, we will see a 201 (Created) response:
With the line added to the database:
To DELETE the same customer:
And to update a customer using PUT:
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