WCF large size request data handling concurrently - wcf

I have a self hosted WCF service for handling HTTP POST request.
My WCF service method will handle 2 types of request (1. getting data, 2. Do some action with given data).
My scenario :
1. Started Action request with large amount of data. : during the starting of that action do some processing.
2. client reads some results.
3. sending the remaining data for the previous action.
I implemented this using 'TcpListener' it is working.
Problem:
when i try to implement this scenario using WCF, i have got the 'Bad request' during the first action request.
[ServiceContract]
public interface ITest
{
[OperationContract, WebInvoke(Method = "POST", UriTemplate = "{*pathname}")]
Stream GetResponse(string pathname, Stream requestBody);
}
[ServiceBehavior(AddressFilterMode = AddressFilterMode.Exact, ConcurrencyMode = ConcurrencyMode.Single, InstanceContextMode = InstanceContextMode.Single, UseSynchronizationContext = false, IncludeExceptionDetailInFaults = true)]
class TestService : ITest
{
public Uri BaseUri { get; private set; }
public IPAddress Address { get; private set; }
public Int32 Port { get; private set; }
public bool IsStarted { get { return Host != null; } }
public ServiceHost Host { get; private set; }
public TestService()
{
}
public TestService(IPAddress ipAddress, int port)
{
if (ipAddress == null) { throw new ArgumentNullException("Address"); }
this.Address = ipAddress;
this.Port = port;
this.BaseUri = new Uri(string.Format("http://{0}:{1}", this.Address, this.Port));
}
public void Start()
{
if (IsStarted) { throw new InvalidOperationException("Service is already started."); }
Host = CreateServiceHost();
Host.Open();
}
public void Stop()
{
if (!IsStarted) { throw new InvalidOperationException("Service is already stopped."); }
Host.Close();
Host = null;
}
private ServiceHost CreateServiceHost()
{
ServiceHost host = new ServiceHost(typeof(TestService), this.BaseUri);
WebHttpBinding webhttpBinding = new WebHttpBinding();
webhttpBinding.MaxBufferPoolSize = int.MaxValue;
webhttpBinding.MaxBufferSize = int.MaxValue;
webhttpBinding.MaxReceivedMessageSize = int.MaxValue;
CustomBinding binding = new CustomBinding(webhttpBinding);
WebMessageEncodingBindingElement webEncoding = binding.Elements.Find<WebMessageEncodingBindingElement>();
webEncoding.ContentTypeMapper = new RawMapper();
host.AddServiceEndpoint(typeof(ITest), binding, new Uri(this.BaseUri.AbsoluteUri)).Behaviors.Add(new WebHttpBehavior());
return host;
}
public Stream GetResponse(string pathname, Stream requestBody)
{
Stream response=null;
/************** Process 'requestBody' **************/
//requestBody contains "MY_ACTION"
//{
// Find the start delimeter from response : START processing
// Find the end delimeter from response : STOP processing
//}
//requestBody contains "GET_MY_DATA"
//{
// Find data and send response
//}
return response;
}
}
public class RawMapper : WebContentTypeMapper
{
public override WebContentFormat GetMessageFormatForContentType(string contentType)
{
return WebContentFormat.Raw;
}
}
Any help/guidance would be great as I'm really stuck on this.

Related

WCF REST read URL-encoded response

I'm trying to use WCF to consume a 3rd-party REST service which responds with URL-encoded data:
a=1&b=2&c=3
I have this now:
[DataContract]
class Response {
[DataMember(Name="a")]
public int A { get;set;}
[DataMember(Name="b")]
public int B { get;set;}
[DataMember(Name="c")]
public int C { get;set;}
}
[ServiceContract]
interface IService
{
[OperationContract]
Response Foo();
}
But it comes back with:
There was an error checking start element of object of type Response. The data at the root level is invalid. Line 1, position 1.
WCF does not "understand" forms-data content type (application/x-www-forms-urlencoded), so it won't be able to read that response directly. You can either implement a message formatter which will be able to convert that format into your contract, or you can receive the response as a Stream (which will give you the full bytes of the response), which you can decode into your class.
The code below shows how you could implement a formatter for this operation. It's not generic, but you should get the picture of what needs to be done.
public class StackOverflow_16493746
{
[ServiceContract]
public class Service
{
[WebGet(UriTemplate = "*")]
public Stream GetData()
{
WebOperationContext.Current.OutgoingResponse.ContentType = "application/x-www-form-urlencoded";
return new MemoryStream(Encoding.UTF8.GetBytes("a=1&b=2&c=3"));
}
}
[ServiceContract]
interface IService
{
[WebGet]
Response Foo();
}
[DataContract]
class Response
{
[DataMember(Name = "a")]
public int A { get; set; }
[DataMember(Name = "b")]
public int B { get; set; }
[DataMember(Name = "c")]
public int C { get; set; }
}
public class MyResponseFormatter : IClientMessageFormatter
{
private IClientMessageFormatter originalFormatter;
public MyResponseFormatter(IClientMessageFormatter originalFormatter)
{
this.originalFormatter = originalFormatter;
}
public object DeserializeReply(Message message, object[] parameters)
{
HttpResponseMessageProperty httpResp = (HttpResponseMessageProperty)
message.Properties[HttpResponseMessageProperty.Name];
if (httpResp.Headers[HttpResponseHeader.ContentType] == "application/x-www-form-urlencoded")
{
if (parameters.Length > 0)
{
throw new InvalidOperationException("out/ref parameters not supported in this formatter");
}
byte[] bodyBytes = message.GetReaderAtBodyContents().ReadElementContentAsBase64();
NameValueCollection pairs = HttpUtility.ParseQueryString(Encoding.UTF8.GetString(bodyBytes));
Response result = new Response();
foreach (var key in pairs.AllKeys)
{
string value = pairs[key];
switch (key)
{
case "a":
result.A = int.Parse(value);
break;
case "b":
result.B = int.Parse(value);
break;
case "c":
result.C = int.Parse(value);
break;
}
}
return result;
}
else
{
return this.originalFormatter.DeserializeReply(message, parameters);
}
}
public Message SerializeRequest(MessageVersion messageVersion, object[] parameters)
{
throw new NotSupportedException("This is a reply-only formatter");
}
}
public class MyClientBehavior : WebHttpBehavior
{
protected override IClientMessageFormatter GetReplyClientFormatter(OperationDescription operationDescription, ServiceEndpoint endpoint)
{
return new MyResponseFormatter(base.GetReplyClientFormatter(operationDescription, endpoint));
}
}
public static void Test()
{
string baseAddress = "http://" + Environment.MachineName + ":8000/Service";
WebServiceHost host = new WebServiceHost(typeof(Service), new Uri(baseAddress));
host.Open();
Console.WriteLine("Host opened");
ChannelFactory<IService> factory = new ChannelFactory<IService>(new WebHttpBinding(), new EndpointAddress(baseAddress));
factory.Endpoint.Behaviors.Add(new MyClientBehavior());
IService proxy = factory.CreateChannel();
Response resp = proxy.Foo();
Console.WriteLine("a={0},b={1},c={2}", resp.A, resp.B, resp.C);
((IClientChannel)proxy).Close();
factory.Close();
Console.Write("Press ENTER to close the host");
Console.ReadLine();
host.Close();
}
}

Client hangs after completing wcf service call [duplicate]

I have a wpf application which calls a wcf service method. The method runs fine in debugging mode but the method doesnt return back to the client call.
Here is the code.
Client:
public class Provider
{
private static ActionServiceClient Client { get; set; }
static Provider()
{
Client = new ActionServiceClient();
}
public UserResponse GetUsers(UserRequest request)
{
UserResponse resp = new UserResponse();
resp = Client.GetUsers(request);
return resp;
}
}
WCF Service :
[ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Reentrant, UseSynchronizationContext = false)]
public class ActionService : IActionService
{
public MovieResponse GetReviews(MovieRequest request)
{
List<MovieReview> reviews = DataAccess.GetMovieReviews(0);
MovieResponse response = new MovieResponse();
response.movieReviews = reviews;
return response;
}
public UserResponse GetUsers(UserRequest request)
{
List<User> users = DataAccess.GetUsers(0);
UserResponse resp = new UserResponse();
resp.users = users;
return resp;
}
[DataContract]
public class UserResponse
{
[DataMember]
public List<User> users;
}
[DataContract]
public class UserRequest
{
[DataMember]
public int userId;
}
I run the program in debug mode and after completion of the service call the wpf application hangs....
Oops....Passing an image is not allowed.

WCF Service not Processing MSMQ Message

I have a WCF Windows Service that checks for MSMQ messages.
It picks the messages up ok but the ProcessMSMQMessage event does not seem to get called.
Any ideas why this is? Have I set ProcessMSMQMessage event correctly? Or am I missing something?
My code is below. Thanks.
WCF Service Class...
public partial class MyService : ServiceBase
{
private ServiceHost host;
public MyService()
{
InitializeComponent();
}
protected override void OnStart(string[] args)
{
string queueName = ConfigurationManager.AppSettings["ProcessMsgQueueName"];
if (!MessageQueue.Exists(queueName))
{
MessageQueue thisQueue = MessageQueue.Create(queueName, true);
thisQueue.SetPermissions("Everyone", MessageQueueAccessRights.ReceiveMessage);
}
try
{
Uri serviceUri = new Uri("msmq.formatname:DIRECT=OS:" + queueName);
// communicate to MSMQ how to transfer and deliver the messages
MsmqIntegrationBinding serviceBinding = new MsmqIntegrationBinding();
serviceBinding.Security.Transport.MsmqAuthenticationMode = MsmqAuthenticationMode.None;
serviceBinding.Security.Transport.MsmqProtectionLevel = System.Net.Security.ProtectionLevel.None;
serviceBinding.SerializationFormat = MsmqMessageSerializationFormat.Binary;
host = new ServiceHost(typeof(MyService.Service1)); // add watcher class name
host.AddServiceEndpoint(typeof(MyService.IService1), serviceBinding, serviceUri);
host.Open();
}
catch (Exception ex)
{
EventLog.WriteEntry("SERVICE" + ex.Message, EventLogEntryType.Error);
}
}
protected override void OnStop()
{
if (host != null)
host.Close();
}
}
IService1 Contract...
[ServiceContract(Namespace = "MyService")]
[ServiceKnownType(typeof(Events.Dashboard_Message))]
public interface IService1
{
[OperationContract(IsOneWay = true)]
void ProcessMSMQMessage(MsmqMessage<Events.Dashboard_Message> msg);
}
Service1 Class...
public class Service1 : IService1
{
[OperationBehavior(TransactionScopeRequired = true, TransactionAutoComplete = true)]
public void ProcessMSMQMessage(MsmqMessage<Events.Dashboard_Message> msg)
{
string msgName = msg.GetType().Name;
// send to eventlog
EventLog.WriteEntry("MyService", msgName);
}
}
Got it working finally.
The issue was in IService1 contract. Needed to add Action = "*".
[OperationContract(IsOneWay = true, Action = "*")]

WCF Rest weird routing behavior

I have a resource available at
http://localhost/resource
I do not have any route like
http:/localhost/resource?name=john
but when I try to hit the above URI I get the result of http://localhost/resource. I was expecting a 404.
Any idea why its ignoring ?name=john and match the url ??
Query string parameters are optional and not "officially" part of the address - it goes from the scheme to the path (via host and port). There are many scenarios where you have one operation at address http://something.com/path, and in the operation code you look at the query string parameters to make some decision. For example, the code below looks for a "format" parameter in the query string which may or may not be passed, and all requests (with or without it) are correctly routed to the operation.
public class StackOverflow_10422764
{
[DataContract(Name = "Person", Namespace = "")]
public class Person
{
[DataMember]
public string Name { get; set; }
[DataMember]
public int Age { get; set; }
}
[ServiceContract]
public class Service
{
[WebGet(UriTemplate = "/NoQueryParams")]
public Person GetPerson()
{
string format = WebOperationContext.Current.IncomingRequest.UriTemplateMatch.QueryParameters["format"];
if (format == "xml")
{
WebOperationContext.Current.OutgoingResponse.Format = WebMessageFormat.Xml;
}
else if (format == "json")
{
WebOperationContext.Current.OutgoingResponse.Format = WebMessageFormat.Json;
}
return new Person { Name = "Scooby Doo", Age = 10 };
}
}
public static void Test()
{
string baseAddress = "http://" + Environment.MachineName + ":8000/Service";
WebServiceHost host = new WebServiceHost(typeof(Service), new Uri(baseAddress));
host.Open();
Console.WriteLine("Host opened");
WebClient c = new WebClient();
Console.WriteLine(c.DownloadString(baseAddress + "/NoQueryParams"));
c = new WebClient();
Console.WriteLine(c.DownloadString(baseAddress + "/NoQueryParams?format=json"));
Console.Write("Press ENTER to close the host");
Console.ReadLine();
host.Close();
}
}
Update after comments:
If you want to force the request to contain exactly the parameters specified in the template, then you can use something like a message inspector to validate that.
public class StackOverflow_10422764
{
[DataContract(Name = "Person", Namespace = "")]
public class Person
{
[DataMember]
public string Name { get; set; }
[DataMember]
public int Age { get; set; }
}
[ServiceContract]
public class Service
{
[WebGet(UriTemplate = "/NoQueryParams")]
public Person GetPerson()
{
string format = WebOperationContext.Current.IncomingRequest.UriTemplateMatch.QueryParameters["format"];
if (format == "xml")
{
WebOperationContext.Current.OutgoingResponse.Format = WebMessageFormat.Xml;
}
else if (format == "json")
{
WebOperationContext.Current.OutgoingResponse.Format = WebMessageFormat.Json;
}
return new Person { Name = "Scooby Doo", Age = 10 };
}
[WebGet(UriTemplate = "/TwoQueryParam?x={x}&y={y}")]
public int Add(int x, int y)
{
return x + y;
}
}
public class MyForceQueryMatchBehavior : IEndpointBehavior, IDispatchMessageInspector
{
#region IEndpointBehavior Members
public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
{
}
public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
{
}
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
{
endpointDispatcher.DispatchRuntime.MessageInspectors.Add(this);
}
public void Validate(ServiceEndpoint endpoint)
{
}
#endregion
#region IDispatchMessageInspector Members
public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
{
UriTemplateMatch uriTemplateMatch = (UriTemplateMatch)request.Properties["UriTemplateMatchResults"];
// TODO: may need to deal with the case of implicit UriTemplates, or if you want to allow for some query parameters to be ommitted
List<string> uriTemplateQueryVariables = uriTemplateMatch.Template.QueryValueVariableNames.Select(x => x.ToLowerInvariant()).ToList();
List<string> requestQueryVariables = uriTemplateMatch.QueryParameters.Keys.OfType<string>().Select(x => x.ToLowerInvariant()).ToList();
if (uriTemplateQueryVariables.Count != requestQueryVariables.Count || uriTemplateQueryVariables.Except(requestQueryVariables).Count() > 0)
{
throw new WebFaultException(HttpStatusCode.NotFound);
}
return null;
}
public void BeforeSendReply(ref Message reply, object correlationState)
{
}
#endregion
}
static void SendRequest(string uri)
{
Console.WriteLine("Request to {0}", uri);
WebClient c = new WebClient();
try
{
Console.WriteLine(" {0}", c.DownloadString(uri));
}
catch (WebException e)
{
HttpWebResponse resp = e.Response as HttpWebResponse;
Console.WriteLine(" ERROR => {0}", resp.StatusCode);
}
}
public static void Test()
{
string baseAddress = "http://" + Environment.MachineName + ":8000/Service";
ServiceHost host = new ServiceHost(typeof(Service), new Uri(baseAddress));
ServiceEndpoint endpoint = host.AddServiceEndpoint(typeof(Service), new WebHttpBinding(), "");
endpoint.Behaviors.Add(new WebHttpBehavior());
endpoint.Behaviors.Add(new MyForceQueryMatchBehavior());
host.Open();
Console.WriteLine("Host opened");
SendRequest(baseAddress + "/NoQueryParams");
SendRequest(baseAddress + "/NoQueryParams?format=json");
SendRequest(baseAddress + "/TwoQueryParam?x=7&y=9&z=other");
SendRequest(baseAddress + "/TwoQueryParam?x=7&y=9");
Console.Write("Press ENTER to close the host");
Console.ReadLine();
host.Close();
}
}

Get the domain name of a WCF request?

How can I obtain the domain name or full URL of the requester?
I'm not sure that I understand your question, but if you need the domain name of the Windows user making the call to a service operation, use this:
OperationContext.Current.ServiceSecurityContext.PrimaryIdentity.Name
This will return "{domain}\{username}".
Try this and let me know what you think (you'll probably want to paste this code into an mstest project):
[TestClass]
public class AlternativeCredentials
{
// Contracts
[ServiceContract]
interface IMyContract
{
[OperationContract]
string GetUserName();
}
// Service
[ServiceBehavior(IncludeExceptionDetailInFaults = true)]
class MyService : IMyContract
{
public string GetUserName()
{
return OperationContext.Current.ServiceSecurityContext.PrimaryIdentity.Name;
}
}
// Client
class MyContractClient : ClientBase<IMyContract>, IMyContract
{
public MyContractClient() { }
public MyContractClient(Binding binding, string address) :
base(binding, new EndpointAddress(address)) { }
public string GetUserName()
{ return Channel.GetUserName(); }
}
#region Host
static string address = "net.tcp://localhost:8001/" + Guid.NewGuid().ToString();
static ServiceHost host;
[ClassInitialize()]
public static void MyClassInitialize(TestContext testContext)
{
host = new ServiceHost(typeof(MyService));
host.AddServiceEndpoint(typeof(IMyContract), new NetTcpBinding(), address);
host.Open();
}
[ClassCleanup()]
public static void MyClassCleanup()
{
if (host.State == CommunicationState.Opened)
host.Close();
}
#endregion
[TestMethod]
public void UseUserNameCredentials()
{
using (MyContractClient proxy =
new MyContractClient(new NetTcpBinding(), address))
{
proxy.ClientCredentials.UserName.UserName = "MyUsername";
proxy.ClientCredentials.UserName.Password = "MyPassword";
proxy.Open();
Assert.AreEqual("EMS\\magood", proxy.GetUserName());
proxy.Close();
}
}
}