I am new in WCF. I know that we have to write endpoint in config file at service end and as well as client end. suppose I have multiple endpoint like
<services>
<service name="YourNamespace.YourService" behaviorConfiguration="Default">
<endpoint name="Default"
address="http://YourServer/Services/MyService"
binding="basicHttpBinding"
contract="YourNamespace.IYourService"/>
<endpoint name="TCP"
address="net.tcp://YourServer/ServicesTCP/MyService"
binding="netTcpBinding"
contract="YourNamespace.IYourService"/>
<endpoint name="Dual"
address="http://YourServer/Services/MyService/Dual"
binding="wsDualHttpBinding"
clientBaseAddress="http://localhost:8001/client/"
contract="YourNamespace.IYourDualService"/>
<endpoint name="mex"
address=""
binding="mexHttpBinding"
contract="IMetadataExchange"/>
</service>
</services>
we know that we can not create proxy at client side with endpoint address like
http://YourServer/Services/MyService/Dual or
net.tcp://YourServer/ServicesTCP/MyService
rather if we need to create proxy at client side then we need to provide mex endpoint address. so I just do not understand what is the use of endpoint address?
When we create proxy at client side and call service then we just do not understand our proxy is using what endpoint address to connect to service?
That is why I just want to know how endpoint address come into role?
I know that we can write separate mex endpoint for tcp in config file as a result we can create proxy with that mex url as a result when client would connect to service then tcp protocol will be used for communication but for other http endpoints one mex endpoint works fine.
My important question is which I really like to know that suppose i have 3 endpoints like basichttp,wshttp,wsdualbidning then one mex endpoint works for all of them to create proxy. so tell me in that case when client connect to service then which endpoint address will be used to connect to that service?
It will be great help if some one discuss this issue with great detail and with sample config entry and as well as sample service code?
UPDATED Part
Tom Redfern said...service endpoints is not required in case of internal use. suppose I have developed a service which is hosted in console apps and other client need to connect to that service. so tell me in this case how client can connect to service without proxy class and call various method of service. I just like to know without proxy how can I connect and call various method of wcf service. please come with some sample code for client side just to show how programmatically I can connect and call various method of wcf service without proxy.
An endpoint needs a way of addressing it. This is both fundamental and reasonable.
Your argument that the client only requires a metadata endpoint address in order to resolve the actual service endpoints only holds true when you are exposing a metadata endpoint (which is by no means required) and when the consumer has no other means to consume the service (perhaps the service is public).
Most services are developed for internal consumption where the ability to bind directly to an endpoint via referencing a shared types assembly (rather than via a service proxy) is commonplace. Knowledge of the endpoint address in these instances is absolutely required.
If you read about the history of UDDI, this was designed as a means to distribute service metadata to consumers who would have no need to know anything else about the service. However, how often do you see a UDDI server? I have seen it used in exactly one company (I have worked in about 20 in total).
Related
When attempting to add a service reference to a WCF service to my .NET project I am getting an error:
Failed to add a service. Service metadata may not be accessible. Make sure your service is running and exposing metadata.
After doing some research I decided to add a metadate exchange endpoint to my service:
<endpoint
address="mex"
binding="mexHttpsBinding"
contract="IMetadataExchange"/>
Now, after adding the enedpoint I am getting a different type of error:
Could not find a base address that matches scheme http for the endpoint with binding BasicHttpBinding. Registered base address schemes are [https].
What am I doing wrong here?
If I open service in the browser, it works just fine:
https://alias.domain.com/ProjectName/MyService.svc?wsdl
mexHttpBinding is only for http:// but as your service is exposed over https:// you need to change it to mexHttpsBinding.
See here: https://msdn.microsoft.com/en-us/library/aa395212(v=vs.110).aspx
Solved!
The issue was that some XSD references in WSDL, schemaLocation in particular. For some reason schemaLocation used machine name instead of the domain name. After I fixed that I was able to add a reference to the service
What is the difference between the Service node/section and the Client node/section in the configuration section? Why configure endpoints in one section over the other? Which is best for interoperability?
I'm currently building a service that talks to another service. I have endpoints for my clients and endpoints for the other service. Visual Studio seems to lump all the endpoints into the Client section.
I thought that client node was for your consumption and service node was for producing. But when you create a new wcf service visual studio puts your new service endpoint settings under the client node. I have moved my endpoint between both sections trying to figure out what the difference is.
When should I use service over client?
<system.serviceModel>
<services>
<service> <!--I noticed some tutorials and using wcf config edit tool
puts producer endpoint settings here -->
<endpoint blah settings/>
<endpoint blah settings/>
</service>
</services>
<client> <!--Visual Studio puts both producer and consumer endpoint
settings here -->
<endpoint blah settings />
<endpoint blah settings />
<endpoint blah settings />
</client>
<bindings>.....
</system.serviceModel>
Many settings in the WCF web.config (or app.config for that matter) can be shared for both consumers of a service as well as publishers of a service including:
Bindings
Endpoint Behaviors
Diagnostics
However as you have discovered, some config is specific to a service. A well-written service usually specifies:
It's base address. This is a convenience when defining a service as it allows your to define endpoints using relative addresses. Clients however don't use this particular setting as they need an absolute path. For this reason it makes no sense to specify in the section
Services can also be clients. If the client and server endpoints were all plonked together, WCF would not be able to know which should utilise the base address for one thing
Service behavior
By dividing up config between client and server, WCF is better able to know where to look for endpoints.
Which is best for interoperability?
I don't think that has anything to do with it. WCF is a means to achieve interopability but just by using WCF does not imply you will achieve it. Interopability is established when both parties agree on say a particular service contract; canonical data model; data transformation; message version or many of the other patterns as defined by SOA Patterns.org So there are various patterns you must follow. e.g. If you change a method on service contract but have not updated the clients then you have broken interopability by breaking the schema of the service.
Visual Studio seems to lump all the endpoints into the Client section
If your WCF process is both a consumer and producer of WCF services then it should not be putting all the endpoints under
I'm at the client end of a wcf service. I've promoted my code from the test environment to live. My live test failed. The service provided says I need to change the bindingNamespace. However as i'm at the client end so I can't set the bindingNamespace in the client endpoint's config file, can I? Also am i correct in thinking that the serivice provider shouldn't be changing the bindingNamespace between dev, test and live environments. Surely that's what the address is for?
endpoint binding="webHttpBinding" bindingNamespace="https://www.abc123LIVE.co.uk/foo/webservices/operations"
endpoint binding="webHttpBinding" bindingNamespace="https://www.acb123TEST.co.uk/foo/webservices/operations"
i need to use WCF Service with in my web application.
I ama new to wcf.
i created the service and add the service reference in my web application.
It shows the http:localhost in end point address.
endpoint address="http://localhost:52123/GeneralService1.svc"
i am confused to use the local host for access the wcf in web.
Is there any way to communicate with wcf / how to enable the connection.
Thanks in Advance
Pooja
A WCF endpoint has its ABC.
A - Address
B - Binding
C - Contract
<endpoint address="" binding="wsHttpBinding" contract="WcfService2.IService1">
You can change the address, by putting the Url of your deployment server, where the service would be hosted in production.
Read this for more details of WCF endpoint ABC
You can modify this address in the web.config file, to the url, while deployment.
How many ServiceContracts can a WCF service have?
Specifically, since a ServiceContract is an attribute to an interface, how many interfaces can I code into one WCF web service? Is it a one-to-one?
Does it make sense to separate the contracts across multiple web services?
WCF services can have multiple endpoints, each of which can implement a different service contract.
For example, you could have a service declared as follows:
[ServiceBehavior(Namespace = "DemoService")]
public class DemoService : IDemoService, IDoNothingService
Which would have configuration along these lines:
<service name="DemoService" behaviorConfiguration="Debugging">
<host>
<baseAddresses>
<add baseAddress = "http://localhost/DemoService.svc" />
</baseAddresses>
</host>
<endpoint
address =""
binding="customBinding"
bindingConfiguration="InsecureCustom"
bindingNamespace="http://schemas.com/Demo" contract="IDemoService"/>
<endpoint
address =""
binding="customBinding"
bindingConfiguration="InsecureCustom"
bindingNamespace="http://schemas.com/Demo" contract="IDoNothingService"/>
</service>
Hope that helps, but if you were after the theoretical maximum interfaces you can have for a service I suspect it's some crazily large multiple of 2.
You can have a service implement all the service contracts you want. I mean, I don't know if there is a limit, but I don't think there is.
That's a neat way to separate operations that will be implemented by the same service in several conceptually different service contract interfaces.
#jdiaz
Of course you should strive to have very different business matters in different services, but consider the case in which you want that, for example, all your services implement a GetVersion() operation. You could have a service contract just for that operation and have every service implement it, instead of adding the GetVersion() operation to the contract of all your services.
A service can theoretically have any number of Endpoints, and each Endpoint is bound to a particular contract, or interface, so it is possible for a single conceptual (and configured) service to host multiple interfaces via multiple endpoints or alternatively for several endpoints to host the same interface.
If you are using the ServiceHost class to host your service, though, instead of IIS, you can only associate a single interface per ServiceHost. I'm not sure why this is the case, but it is.