I'm using the ChannelFactory in WCF to call into a REST service and I want to determine whether the server returned HTTP 200 or 201 in response to a PUT call. Currently, the call succeeds, but I can't determine if my object was created or updated. How can I do this?
WCF is designed for all sorts of channels so this is not a high level object
You can access it though with something like this
factory.Endpoint.Behaviors.Add(new WebHttpBehavior());
IMyContract proxy = factory.CreateChannel();
using (OperationContextScope scope = new OperationContextScope((IContextChannel)proxy)) {
proxy.MyMethod("Some data"));
var responseCode = WebOperationContext.Current.IncomingResponse.StatusCode;
}
((IClientChannel)proxy).Close();
factory.Close();
Related
I am doing something wrong and I can't figure it out ... I made .NET Framework 4 console application to communicate with SOAP Service, with use of Topshelf I deployed service on a server and with simple URL access to a method or use of Boomerang tool, I can see service is returning value
URL: http://35.231.17.237:8066/ERPCommunicationService/OriginalService/IsServiceHealthy
But now, when I try to access same service, from .NET Core project, I keep getting error:
System.ServiceModel.ProtocolException:
The remote server returned an unexpected response: (405) Method Not Allowed.
at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)
at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(
SendAsyncResult result)
at System.ServiceModel.Channels.ServiceChannel.EndCall(
String action, Object[] outs, IAsyncResult result)
at System.ServiceModel.Channels.ServiceChannelProxy.TaskCreator.<>c__DisplayClass1_0.
<CreateGenericTask>b__0(IAsyncResult asyncResult)
--- End of stack trace from previous location where exception was thrown ---
Code is simple, I successfully used service endpoint to connect it to .NET Core project, where I can see Reference.cs autogenerated file and all methods from service are there ...
Here is service call from client side (.net core):
public async Task<bool> IsServiceHealthy()
{
try
{
string servicesUrl = $"{_iConfiguration["servicesUrl"]}/IsServiceHealthy";
//My binding setup, since ASP.NET Core apps don't use a web.config file
var binding = new BasicHttpBinding(BasicHttpSecurityMode.TransportCredentialOnly);
binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Ntlm;
binding.MaxReceivedMessageSize = 10485760;
binding.SendTimeout = new TimeSpan(0, 0, 0, 180);
binding.ReceiveTimeout = new TimeSpan(0, 0, 0, 180);
var rsExec = new OriginalService.OriginalServiceClient(binding,
new EndpointAddress(servicesUrl));
var clientFactory = rsExec.ChannelFactory.CreateChannel();
var response = await clientFactory.IsServiceHealthyAsync();
return response;
}
catch (Exception ex)
{
logging.LogError(ex.ToString());
throw ex;
}
}
And code from server side (.NET Framework 4):
Interface:
[OperationContract]
[WebInvoke(Method = "GET",
RequestFormat = WebMessageFormat.Json,
UriTemplate = "/IsServiceHealthy")]
bool IsServiceHealthy();
Implementation:
public bool IsServiceHealthy()
{
bool serviceResult = false;
byte[] test = new byte[200];
var client = new ChannelFactory<BisWebWS.BisWebWSSOAPPortType>("BisWebWSSOAPPort")
.CreateChannel();
BisWebWS.tauthStrct auth = ServisBasic.GetAuth();
try
{
var result = client.wsTest(new BisWebWS.wsTestRequest(test));
serviceResult = result.wsTestResult;
}
catch (Exception ex)
{
logger.LogError(ex.InnerException.ToString());
}
return serviceResult;
}
When ever I google shown error, everywhere it says its server side setup, but I am kinda stuck as I installed everything there is ... I am using MS Windows Server 2012 R2 Datacenter,
Thank you for shared idea how to fix this problem
The way that we call the service by using the proxy class is an Http Post request, while there is a GET decoration on the method. It requires an Http Get request instead of Post request. This might directly cause the issue.
[OperationContract]
[WebInvoke(Method = "GET",
RequestFormat = WebMessageFormat.Json,
UriTemplate = "/IsServiceHealthy")]
bool IsServiceHealthy();
If the server host the service by using Webhttpbinding, we could directly get the result by typing the service address in the browser address bar since the default request is an Http Get request (your link is not available).
This kind of service is called Restful-style service.
https://learn.microsoft.com/en-us/dotnet/framework/wcf/feature-details/wcf-web-http-programming-model
https://learn.microsoft.com/en-us/azure/architecture/best-practices/api-design
The typical call is to construct an HTTP request with a request body by using HttpClient library.
We could also call the service by using the client proxy class, like what you do. However, we should keep the binding configuration consistent between the server and the client.
WCF: There was no endpoint listening at, that could accept the message
It is too complex to call the service by using client proxy class, it is better to send Http request with HttpClient when we call Restful style service.
Besides, we could also host the service by using BasicHttpBinding, this may simplify the call. There is no need to add webhttpendpoint behavior and no need to add additional [Webget] decorations.
Simply speaking, we should maintain the binding consistent between the server and the client when using client proxy.
Feel free to let me know if the problem still exists.
I'm fairly recent to WCF and trying to figure out the best way to accomplish my requirements.
I have an application hosting a WCF service with the following code:
Uri u1 = new
Uri("http://localhost:8732/Client1/WcfServiceLibrary1/Service1/"); Uri
u2 = new
Uri("http://localhost:8732/Client1/WcfServiceLibrary1/Service1/mex");
WSHttpBinding binding = new WSHttpBinding();
sHost = new ServiceHost(typeof(WcfServiceLibrary1.Service1), u1);
ServiceMetadataBehavior meta = new ServiceMetadataBehavior();
meta.HttpGetEnabled = true;
sHost.AddServiceEndpoint(typeof(WcfServiceLibrary1.IService1), binding, u1);
sHost.Description.Behaviors.Add(meta); sHost.Open();
I can create a service reference on a client application and call methods on this service no problems. using the code below.
remoteService.Service1Client client = new remoteService.Service1Client();
remote.Text = client.GetData(3);
I can also call a method without a service reference.
EndpointAddress myEndpoint = new EndpointAddress("http://localhost:8732/Client1/WcfServiceLibrary1/Service1/");
WSHttpBinding myBinding = new WSHttpBinding();
ChannelFactory<IService1> ServiceConnectionFactory = new ChannelFactory<IService1>(myBinding, myEndpoint);
IService1 serviceConnection = ServiceConnectionFactory.CreateChannel();
If I try to execute the same code in the host application it get the error below.
The request channel timed out while waiting for a reply after
00:01:00. Increase the timeout value passed to the call to Request or
increase the SendTimeout value on the Binding. The time allotted to
this operation may have been a portion of a longer timeout.
How can a application consume and use a WCF service that it is currently hosting? Do I need to open the service in a thread of its own?
The idea is for the host to trigger some initialization before clients connect.
I use this simple way to attach username and password to the SOAP request header. This works fine inside Java boundaries, but I want to be able to call it with my WCF client. How do I do this?
I've tried the following code, but it does not include the credentials in the header:
wsClient.ClientCredentials.UserName.UserName = "Hello";
wsClient.ClientCredentials.UserName.Password = "World";
Thanks in advance!
That is quite awful non-standardized way. It uses custom HTTP Headers so you cannot expect that built in WCF mechanism will magically support such approach. How should WCF know that you want to add custom non-standard HTTP header to HTTP request (not SOAP header)?
Use this:
var proxy = new YourServiceClient();
using (var scope = new OperationContextScope(proxy.InnerChannel))
{
var prop = new HttpRequestMessageProperty();
prop.Headers.Add("UserName", "Hello");
prop.Headers.Add("Password", "World");
OperationContext context = OperationContext.Current;
context.OutgoingMessageProperties[HttpRequestMessageProperty.Name] = prop;
proxy.CallYourOperation();
}
How do I test the state of my proxy before making calls to my WCF service.
I have a duplex channel created using a duplex channel factory.
Before making any calls to the server I want to check the state of the proxy object created from the channel factory.
I saw this in a book... (to be used in immediate window)
? ((ICommunicationObject)flsProxy).State
But it gave this exception...
Cannot obtain fields or call methods on the instance of type 'System.ServiceModel.ICommunicationObject' because it is a proxy to a
remote object.
Is it better to just catch exceptions?
If you create your client proxy using a DuplexChannelFactory<T>, you should get back a regular old WCF channel:
Callbacks myCallbacks = new Callbacks();
DuplexChannelFactory<IMyService> factory =
new DuplexChannelFactory<IMyService>(myCallbacks,
new NetTcpBinding(), new EndpointAddress(.....));
IMyService proxy = factory.CreateChannel();
and you should be able to cast that to a ICommunicationObject and check its state:
ICommunicationObject comobj = (ICommunicationObject)proy;
if(comobj.State != CommunicationState.Faulted)
{
// call the service method
}
Where in this chain of statements does it no longer work for you??
I want to use the .net class HttpListener to intercept requests to my selfhosted (WebServiceHost) WCF Data Service in order to add the "WWW-Authenticate" header to the response (for user authentication). But it seems like that the HttpListener doesn't intercept any requests that go to my dataservice. The HttpListner works for different paths just fine. Example: HttpListner Prefix: http://localhost/somePath/Works: http://localhost/somePath/Doesn't Work: http://localhost/somePath/myWCFDataService
Is it possible to intercept also requests that go to a selfhosted WCF Data Service (WebServiceHost) with the HttpListner?
Here are the relevant code snippets...
Hosting the WCF DataService:
WebServiceHost dataServiceHost = new WebServiceHost(typeof(MyWCFDataService));
WebHttpBinding binding = new WebHttpBinding();
dataServiceHost.AddServiceEndpoint(typeof(IRequestHandler), binding,
"http://localhost/somePath/myWCFDataService");
dataServiceHost.Open();
The HTTP Listner:
HttpListener httpListener = new HttpListener();
httpListener.Prefixes.Add("http://localhost/somePath/");
httpListener.AuthenticationSchemes = AuthenticationSchemes.Anonymous;
httpListener.Start();
while (true)
{
HttpListenerContext context = httpListener.GetContext();
string authorization = context.Request.Headers["Authorization"];
if (string.IsNullOrEmpty(authorization))
{
context.Response.StatusCode = 401;
context.Response.AddHeader("WWW-Authenticate", "Basic realm=\"myDataService\"");
context.Response.OutputStream.Close();
context.Response.Close();
}
}
Is there a better way for doing HTTP basic authentication within WCF Data Services? I wan't to be able to authenticate via the login dialog of the web browser.
Many thanks,
JeHo
You're barking up the wrong tree messing with proxying via HttpListener. Have a look at this.