In my previous post simple-steps-to-Create-restful-service
We created a Restful
Service. Now we shall see how to test that restful service.
I am going to use Fiddler to post the request on Restful
API. It is free tool which help us to record the traffic over http(s). You can
download fiddler from here
1.
Take the URL (Address to post the data) as shown
in the screenshot below
2.
Open the fiddler and Select the option “Composer”
from tab. As shown in the screenshot below
3.
From the composer screen you need to select the
action type (Verb) address and content type.
Once you select the options as showing in the
screenshot below type the string in “Request Body” you want to
send to the Restful service.
4.
Once everything is prepared. Press “Execute”
button from right top corner of the “Address Bar”. Please refer the screenshot
below
5.
After getting the result you can validate the
response code and message as shown below. Here in the below screenshot you will
see the response code is “400” that means bad request.
So here question is very important. Since, we
have string parameter in contract and we are posting string through fiddler so
why we are getting error 400 (Bad request).
[WebInvoke(Method
="POST",UriTemplate ="/interface") ]
string GetData(string
value);
Here an interest point comes into the
picture. In restful service we can send the XML or streamed data.
So we shall handle this situation with two different
ways
a)
Doing some changes in request
b)
Change in contract.
Change in Request:
If, you refer the screenshot of step one.
You will notice that the request is as below
<string
xmlns="http://schemas.microsoft.com/2003/10/Serialization/"> String content
</string>
So now we need to write our request in this
format.
<string
xmlns="http://schemas.microsoft.com/2003/10/Serialization/"> Hello, This is my first Restful service.
</string>
Now post this above mentioned request and
we shall get the following response:
<string
xmlns="http://schemas.microsoft.com/2003/10/Serialization/"> You entered:
Hello, This is my first Restful service.
</string>
Change in Contract:
Now change
the string parameter type to Stream so the new contract will be like (Change in
IPost.cs interface)
[ServiceContract(Namespace
= "http://localhost/Services/MyRestfulService/2013/04/")]
public interface IPost
{
[OperationContract]
[WebInvoke(Method
="POST",UriTemplate ="/interface") ]
Stream
GetData(Stream value);
}
|
And similarly change in implementation of MyPosts.svc.cs file
[ServiceBehavior(Namespace
= "http://localhost/Services/MyRestfulService/2013/04/")]
public class MyPosts : IPost
{
public
Stream GetData(Stream
value)
{
StreamReader
reader = new StreamReader(value);
string
inputValue = reader.ReadToEnd();
var
outputValue = string.Format("You entered: {0}", inputValue);
var
outStream =
new
MemoryStream(ASCIIEncoding.Default.GetBytes(outputValue));
return
outStream;
}
}
|
Now put the plain test
in request as shown in below screenshot and press execute button
You will get the result
as expected. As shown in screenshot below.
So like this we can test
the simple restful service.
