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Create your first webservice
ServiceStack can be hosted in a few ways: console application, windows service, ASP.NET Web Form or MVC in IIS, etc.
For this tutorial, an empty ASP.NET Web Application (non MVC) is assumed.
To install ServiceStack into your application, you have two options to get the binaries:
Tip: You can find an explanation about all NuGet packages which ServiceStack offers here. The package above only adds the binaries, but there also exist some packages which add the required configurations etc.
Download them here and add them manually to the project.
After you've added the binaries, you need to register ServiceStack in web.config
:
If you want to host ServiceStack at root path (/
), you should use this configuration:
<system.web>
<httpHandlers>
<add path="*" type="ServiceStack.WebHost.Endpoints.ServiceStackHttpHandlerFactory, ServiceStack" verb="*"/>
</httpHandlers>
</system.web>
<!-- Required for IIS 7.0 (and above?) -->
<system.webServer>
<validation validateIntegratedModeConfiguration="false" />
<handlers>
<add path="*" name="ServiceStack.Factory" type="ServiceStack.WebHost.Endpoints.ServiceStackHttpHandlerFactory, ServiceStack" verb="*" preCondition="integratedMode" resourceType="Unspecified" allowPathInfo="true" />
</handlers>
</system.webServer>
Tip: If you want to host your webservice on a custom path to avoid conflicts with another web framework (eg ASP.Net MVC), see https://github.com/ServiceStack/ServiceStack/wiki/Run-servicestack-side-by-side-with-another-web-framework.
Note: Due to limitations in IIS 6 - host ServiceStack at a /custompath which must end with
.ashx
, e.g:path="servicestack.ashx"
If Global.asax.cs
doesn't already exist you have to add it manually. To do this Right-click on your project and go
Add -> New Item, then select the Global Application class.
Each service in ServiceStack consists of three parts:
- Request DTO
- Service implementation
- Response DTO
That's the core philosophy in ServiceStack. Each service has a strongly-typed, code-first (normal POCOs) request DTO and response DTO. You can read a detailed explanation what advantages exist if you're using DTOs in the ReadMe or in [Why should I use ServiceStack?] (https://github.com/ServiceStack/ServiceStack/wiki/Why-Servicestack).
- Create the name of your Web Service (i.e. the Request DTO)
using ServiceStack.ServiceHost;
[Route("/hello")]
[Route("/hello/{Name}")]
public class Hello
{
public string Name { get; set; }
}
- Define what your Web Service will return (i.e. Response DTO)
public class HelloResponse
{
public string Result { get; set; }
}
- Create your Web Service implementation
using ServiceStack.ServiceInterface;
public class HelloService : Service
{
public object Any(Hello request)
{
return new HelloResponse { Result = "Hello, " + request.Name };
}
}
The final step is to configure setup to tell ServiceStack where to find your web services. To do that, add this code to your Global.asax.cs
:
public class Global : System.Web.HttpApplication
{
public class HelloAppHost : AppHostBase
{
//Tell Service Stack the name of your application and where to find your web services
public HelloAppHost() : base("Hello Web Services", typeof(HelloService).Assembly) { }
public override void Configure(Container container)
{
//register any dependencies your services use, e.g:
//container.Register<ICacheClient>(new MemoryCacheClient());
}
}
//Initialize your application singleton
protected void Application_Start(object sender, EventArgs e)
{
new HelloAppHost().Init();
}
}
Done! You now have a working application :)
As you can see, you have created an AppHost
. Mainly all configuration related to ServiceStack is made in the AppHost
. It's the starting point in your application.
If you are using MVC4 then you need to comment line in global.asax.cs to disable WebApi
//WebApiConfig.Register(GlobalConfiguration.Configuration);
Now that you have a working Web Service lets see what ServiceStack does for you out of the box:
If everything is configured correctly you can go to http://<root_path>/metadata
to see a list of your web services and the various end points its available on.
Tip: In the screenshot the root path is
http://localhost/ServiceStack.Hello/servicestack
. On your development box the root path might be something likehttp://localhost:60335
(ie the URL on which your webservice is hosted).
Let's access the HelloWorld service you created in your browser, so write the following URL in your address bar:
GET http://<root_path>/hello/YourName
eg http://www.servicestack.net/ServiceStack.Hello/servicestack/hello/Max.
As you can see after clicking on this link, ServiceStack also contains a HTML response format, which makes the XML/Json (...) output human-readable. To change the return format to Json, simply add ?format=json
to the end of the URL. You'll learn more about formats, endpoints (URLs, etc) when you continue reading the documentation.
If you happen to generate requests from the wsdls with a tool like soapUI you may end up with an incorrectly generated request like this:
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:typ="http://schemas.servicestack.net/types">
<soap:Header/>
<soap:Body>
<typ:Hello/>
</soap:Body>
</soap:Envelope>
You can resolve this issue by adding the following line to your AssemblyInfo file
[assembly: ContractNamespace("http://schemas.servicestack.net/types", ClrNamespace = "<YOUR NAMESPACE>")]
Rebuild and regenerate the request from the updated wsdl. You should get a correct request this time.
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:typ="http://schemas.servicestack.net/types">
<soap:Header/>
<soap:Body>
<typ:Hello>
<!--Optional:-->
<typ:Name>?</typ:Name>
</typ:Hello>
</soap:Body>
</soap:Envelope>
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- Why ServiceStack?
- Important role of DTOs
- What is a message based web service?
- Advantages of message based web services
- Why remote services should use separate DTOs
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