I started working with WCF recently, and I'm having a problem that I just don't have a clue how to solve.
I start a WCF Service using Service Host, but when I use the URI in a browser it doesn't show the contract of the service, and it gives an exception when I try to connect to it using a ChannelFactory.
I created the project in Visual Studio 2017, and didn't do anything to the config file, excpet changing the base address. Both the service interface and implementation are in the root project "folder", and I've tried disabling the firewall and even my antivirus, but nothing seems to work.
App.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
</startup>
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service name="TaskExecutor.Exec">
<endpoint address="" binding="basicHttpBinding" contract="TaskExecutor.IExec">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="http://localhost:8001/TaskExecutor/Exec/" />
</baseAddresses>
</host>
</service>
</services>
</system.serviceModel>
</configuration>
Service interface:
namespace TaskExecutor
{
[ServiceContract]
public interface IExec
{
[OperationContract]
void DoWork();
}
}
Service implementation:
namespace TaskExecutor
{
public class Exec : IExec
{
public void DoWork()
{
Console.WriteLine("Doing work.");
}
}
}
Program launching the service:
using (ServiceHost host = new ServiceHost(typeof(Exec)))
{
host.Open();
Console.WriteLine("exec service started at {0}", host.BaseAddresses[0]);
}
Console.WriteLine("Press any key to end...");
Console.ReadLine();
After launching the program display the message:
exec service started at http://localhost:8001/TaskExecutor/Exec/
Press any key to end...
The service client code is the following:
EndpointAddress endpoint = new EndpointAddress("http://localhost:8001/TaskExecutor/Exec/");
BasicHttpBinding binding = new BasicHttpBinding();
ChannelFactory<IExec> channelFactory = new ChannelFactory<IExec>(binding, endpoint);
IExec proxy = channelFactory.CreateChannel();
proxy.DoWork();
And it gives the exception:
System.ServiceModel.EndpointNotFoundException occurred
HResult=0x80131501
Message=There was no endpoint listening at http://localhost:8001/TaskExecutor/Exec/ that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.
Inner Exception 1:
WebException: Unable to connect to the remote server
Inner Exception 2:
SocketException: No connection could be made because the target machine actively refused it
I seriously don't know what to do, and any help would be amazing.
Thank you very much!
You have exposed metadata but didnt bind it to the service.Here's how you have to.
<behaviors>
<serviceBehaviors>
<behavior name="metadadiscovery">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
Now bind the behavior to the service.
<services>
<service name="TaskExecutor.Exec" behaviorConfiguration="metadadiscovery">
<endpoint address="" binding="basicHttpBinding" contract="TaskExecutor.IExec">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="http://localhost:8001/TaskExecutor/Exec/" />
</baseAddresses>
</host>
</service>
</services>
Now when you type the address in the browser you should be able to see wsdl.
http://localhost:8001/TaskExecutor/Exec/
So I figured out what was wrong, It was the code starting the service. instead of what I have It should be:
using (ServiceHost host = new ServiceHost(typeof(Exec)))
{
host.Open();
Console.WriteLine("exec service started at {0}", host.BaseAddresses[0]);
Console.WriteLine("Press any key to end...");
Console.ReadLine();
}
Related
I'm trying to create a WCF and consume it from another C# class.
I think I'm doing everything right but i Get the error message says Contract name is not familiar.
This is my Web.config code:
<system.serviceModel>
<services>
<service behaviorConfiguration="PNMSoft.Sequence.Invoices.InvoicesBehavior" name="PNMSoft.Sequence.Invoices.Invoices">
<endpoint name="InvoicesEndPoint" address="" binding="wsHttpBinding" contract="PNMSoft.Sequence.Invoices.IInvoices">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="PNMSoft.Sequence.Invoices.InvoicesBehavior">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
This is my interface code:
namespace PNMSoft.Sequence.Invoices
{
[ServiceContract]
public interface IInvoices
{
[OperationContract]
void SendInvoicesToCustomer(int wfid, int userID, int type, string mail, DateTime startDate, DateTime endDate, string clientCode);
}
}
This is my code when I try to activate a function from the service:
InvoicesClient client = new InvoicesClient("InvoicesEndPoint");
client.SendInvoicesToCustomer(IWFID, userID2, type2, Mail, DateFrom2, DateTo2, clientCode2);
On the first row I get this error message: "Could not find endpoint element with name 'InvoicesEndPoint' and contract 'Invoices.IInvoices' in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this name could be found in the client element.".
This is the config file on my cient's side:
<system.serviceModel>
<bindings>
<wsHttpBinding>
<binding name="InvoicesEndPoint" />
</wsHttpBinding>
</bindings>
<client>
<endpoint address="" binding="wsHttpBinding" bindingConfiguration="InvoicesEndPoint" contract="Invoices.IInvoices" name="InvoicesEndPoint">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
</client>
</system.serviceModel>
I guess I need to add something to the config file in my client's side. What should I add?
Thank you in advance!
I solved it, I just had to add the endpoint to the client side's config.
I have created a IDummyService contract implemented by DummyService. I am trying to self-host this service using the following configuration:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
</startup>
<system.serviceModel>
<services>
<service name="DummyService.DummyService" behaviorConfiguration="MEX">
<host>
<baseAddresses>
<add baseAddress="http://localhost:8733/" />
</baseAddresses>
</host>
<endpoint address="DummyService"
binding="basicHttpBinding"
contract="DummyService.IDummyService"/>
<endpoint address="net.tcp://localhost:8734/DummyService/"
binding="netTcpBinding"
bindingConfiguration = "TransactionalTCP"
contract="DummyService.IDummyService"/>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
</service>
</services>
<bindings>
<netTcpBinding>
<binding name = "TransactionalTCP" transactionFlow = "true"/>
</netTcpBinding>
</bindings>
<behaviors>
<serviceBehaviors>
<behavior name = "MEX">
<serviceMetadata/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
</configuration>
The Service Host code that runs fine and starts these endpoints. However, when I try to access the following endpoints I get error as Page isn't working in Chrome browser.
http://localhost:8733/DummyService/
http://localhost:8733/mex/
However, I can access the page http://localhost:8733/
I don't understand why is that.
I thought the endpoint address is address entry for that endpoint appended to host's baseaddress
Any ideas what I am doing wrong ?
Thanks.
You have applied the attribute behaviorConfiguration="MEX" but didnt make use of it,you need to enable the metadata discovery which is false by default in WCF for security reasons.
<serviceBehaviors>
<behavior name = "MEX">
<serviceMetadata httpGetEnabled="true"/>
</behavior>
</serviceBehaviors>
Now when you browse the http://localhost:8733/DummyService/ and http://localhost:8733/mex/ ,a blank page will be displayed in the browser,instead of default error page.
And also if you want to test the net.tcp endpoint you can use WCFtestclient.exe.
I googled for 2 days and tried almost everything, but I still can't get this stuff working.
I have 2 WCF services. I use self-hosting, not IIS(for some reasons IIS isn't working for me). One is duplex, another is standart. Here are their contracts:
Duplex:
[ServiceContract(SessionMode = SessionMode.Required, CallbackContract = typeof(IServiceCallback))]
public interface IClientService
{
[OperationContract(IsOneWay = true)]
void SolveTask(string pipelineName, string data);
[OperationContract(IsOneWay = true)]
void GenerateTask(List<GeneratorMethod> parameters);
[OperationContract]
bool Ping();
}
public interface IServiceCallback
{
[OperationContract(IsOneWay = true)]
void SendResult(SampleAnswer[] answers);
[OperationContract(IsOneWay = true)]
void RequestGeneratorParameters();
[OperationContract(IsOneWay = true)]
void SendGenerationResult(string text);
}
Classic:
[ServiceContract]
public interface IServerManagementService
{
[OperationContract]
[FaultContract(typeof(XmlError))]
[FaultContract(typeof(UnknownError))]
[FaultContract(typeof(InitializationError))]
void InitializeServer();
[OperationContract]
void StartServer();
[OperationContract]
void StopServer();
[OperationContract]
void RestartServer();
}
I have following config:
<configuration>
<services>
<service behaviorConfiguration="Service" name="LinProgWebServer.ClientService">
<endpoint address="net.tcp://localhost:8078/LinProgWebServer/ClientService"
binding="netTcpBinding" bindingConfiguration="netTcpEventBinding"
contract="LinProgWebServer.IClientService">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding" bindingConfiguration=""
contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="http://localhost:8731/Design_Time_Addresses/LinProgWebServer/ClientService" />
</baseAddresses>
</host>
</service>
<!--сервис управления сервером-->
<!--<service behaviorConfiguration="Service" name="LinProgWebServer.ServerManagementService">
<endpoint address="net.tcp://localhost:8079/LinProgWebServer/ManagementService"
binding="netTcpBinding" bindingConfiguration="netTcpEventBinding"
contract="LinProgWebServer.IServerManagementService">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding" bindingConfiguration=""
contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="http://localhost:8732/Design_Time_Addresses/LinProgWebServer/ManagementService" />
</baseAddresses>
</host>
</service>-->
</services>
<behaviors>
<serviceBehaviors>
<behavior name="Service">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
<behavior name="">
<serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
Now i have a big trouble: I CAN find classic service via add service reference and CANNOT find duplex service. I tried netstat and it says that both services are listening on their ports. What am i doing wrong?
Here is exception i get:
There was an error downloading 'http://localhost:8731/Design_Time_Addresses/LinProgWebServer/ClientService/_vti_bin/ListData.svc/$metadata'.
The request failed with HTTP status 405: Method Not Allowed.
Metadata contains a reference that cannot be resolved: 'http://localhost:8731/Design_Time_Addresses/LinProgWebServer/ClientService'.
There was no endpoint listening at http://localhost:8731/Design_Time_Addresses/LinProgWebServer/ClientService that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.
The remote server returned an error: (404) Not Found.
If the service is defined in the current solution, try building the solution and adding the service reference again.
I'll be grateful for any help.
Make sure you .svc file has the correct name of the class you added in your Service Reference
if you added a service called 'Foo' it should look like:
<%# ServiceHost Language="C#" Debug="true" Service="Foo" CodeBehind="Foo.svc.cs" %
Also, make sure you have
In your web.config
I'm not sure whether this is going to be usefull. All my configs and services were fine, but i had a mistace in types, which were involved in work of wcf services, i haven't marked one of the types as datacontract. U'm very surprised why service started without erros and showed me such not informative messages. Also, thanks Yuval for reminding about InstanceContextMode attribute.
Add this to the area where you setup you set up your endpoint and reference your service classes:
//config service metadata
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
ServiceMetadataBehavior mb = new ServiceMetadataBehavior();
ServiceHost.Description.Behaviors.Add(mb);
if (bUseSSL) {
mb.HttpsGetEnabled = true;
mb.HttpGetEnabled = false;
ServiceHost.AddServiceEndpoint(ServiceMetadataBehavior.MexContractName, MetadataExchangeBindings.CreateMexHttpsBinding(), "mex");
} else {
mb.HttpsGetEnabled = false;
mb.HttpGetEnabled = true;
ServiceHost.AddServiceEndpoint(ServiceMetadataBehavior.MexContractName, MetadataExchangeBindings.CreateMexHttpBinding(), "mex");
}
You should not be using the same URL that you were using to host it in the dev environment. Localhost means nothing outside of the machine, anyway. Use the IP address of the machine and also -- you might have to use netsh to open the port on that machine.
I'm new to WCF. Yesterday I put together my first Self-hosted WCF service. Everything was going well, however I am no longer getting any HTTP response from my dev machine. I can't even get to WSDL... I was hoping somebody could take a look over my configuration please?
host.Open(); actually works, so it seems to be running okay; it's just I can't seem to browse to any of the endpoints in a web browser on the hosting machine without a 404.
Program.cs
static void Main(string[] args)
{
try
{
using (ServiceHost host = new ServiceHost(typeof(WebImageRenderer.Renderer)))
{
host.Open();
Console.WriteLine(host.BaseAddresses[0].AbsoluteUri);
}
}
catch (Exception ex) { Console.WriteLine(ex.Message); }
while (true) Console.ReadLine();
}
App.Config
<?xml version="1.0"?>
<configuration>
<system.serviceModel>
<services>
<service name="WebImageRenderer.Renderer" behaviorConfiguration="serviceBehavior">
<endpoint address="" binding="basicHttpBinding" contract="WebImageRenderer.IRenderer"/>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
<host>
<baseAddresses>
<add baseAddress="http://localhost:8000"/>
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="serviceBehavior">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug httpHelpPageEnabled="true" includeExceptionDetailInFaults="true"/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
</configuration>
Thank you all
I think your ServiceHost is closed as soon as you exit the "using" block. Try putting the ReadLine loop inside.
Every time my program runs vs adds the default configuration to my app.config file. At that run it works fine, but at the next run it actually tries to read the config.
The problem is that the default configuration has errors, it adds the attribute "Address", but attritbutes are not allowed to have capitals so it throws an exception.
This means I have to remove the bad section every run!
I've tried to configure the .config but it gives errors.
Here is the code that I use to host the server:
private static System.Threading.AutoResetEvent stopFlag = new System.Threading.AutoResetEvent(false);
ServiceHost host = new ServiceHost(typeof(Service), new Uri("http://localhost:8000"));
host.AddServiceEndpoint(typeof(IService), new BasicHttpBinding(), "ChessServer");
host.Open();
stopFlag.WaitOne();
host.Close();
Here is the client code that calls the server:
ChannelFactory<IChessServer> scf;
scf = new ChannelFactory<IService>
(new BasicHttpBinding(), "http://localhost:8000");
IService service = scf.CreateChannel();
Thanks for any help.
Edit: Sorry it took me so long, I've been trying to use DualWSHttpBinding instead (since I actually need the server to call client methods to anyway) but still generates the config file. Here's the entire auto-generated config file:
<?xml version="1.0"?>
<configuration>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup><system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service name="Chess.ChessService">
<endpoint Address="" binding="wsHttpBinding" contract="Chess.IChessServer">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint Address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
<host>
<baseAddresses>
<Add baseAddress="http://localhost:8732/Design_Time_Addresses/Chess/ChessService/" />
</baseAddresses>
</host>
</service>
<service name="Chess.ChessClient">
<endpoint Address="" binding="wsHttpBinding" contract="Chess.IChessClient">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint Address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
<host>
<baseAddresses>
<Add baseAddress="http://localhost:8732/Design_Time_Addresses/Chess/ChessClient/" />
</baseAddresses>
</host>
</service>
</services>
</system.serviceModel>
</configuration>
Visual Studio does not re-create the WCF configuration on every run. It will re-create the WCF configuration every time you do an Update Service Reference on your service reference in the project - but it definitely doesn't automatically do that before every run - there must be something else causing you grief here.
Furthermore, you're not connecting to the correct address - your server defines it here:
ServiceHost host = new ServiceHost(..., new Uri("http://localhost:8000"));
host.AddServiceEndpoint(..., .., "ChessServer");
and this results in your endpoint address on the server being
http://localhost:8000/ChessServer
However, you're client appears to attempt to connect to
http://localhost:8000/
and there's no service there.
A last point: if you set up all your things like endpoints, bindings etc. in code, any changes to the config shouldn't even bother you at all - there must be something else causing your problems.
You're quite mistaken. Attribute and element names may be upper or lower case.
What makes you think that the case of the attribute is the problem? And what makes you think that the app.config is changed on every run?