wcf webhttpbinding

1. The example below shows a client that talks to a service using WebHttpBinding. The service does not generate a meaninful WSDL for endpoints with WebHttpBinding (WSDL is for SOAP-based endpoints only), so the client needs to get the contract from the server in an out-of-band way.

 

As far as passing complex objects go, if you're using POST requests, they should just work. It's not possible (nor a good REST practice) to pass complex objects in GET operations (*). You should be able to receive complex objects in either GET or POST operations without problems

 

(*) If you use JSON you can pass complex objects as parameters to WebGet operations, but you indicated that you didn't want to use JSON.

 

 

 

//WebHttpBinding issues - WebHttpBinding client

 

 

public class Post2592218a { [DataContract] public class MyComplexObject { [DataMember] public string str; [DataMember] public int i; public MyComplexObject(int i, string str) { this.i = i; this.str = str; } public override string ToString() { return String.Format("MyComplexObject[i={0},str={1}]", i, str); } } [ServiceContract] public interface ITest { [OperationContract, WebGet] MyComplexObject GetComplex(string input); [OperationContract, WebInvoke] MyComplexObject Process(MyComplexObject input); } public class Service : ITest { public MyComplexObject GetComplex(string input) { return new MyComplexObject(input.Length, input); } public MyComplexObject Process(MyComplexObject input) { input.str = "Result: " + input.str; input.i = input.str.Length; return input; } } 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(ITest), new WebHttpBinding(), ""); endpoint.Behaviors.Add(new WebHttpBehavior()); host.Open(); Console.WriteLine("Host opened"); ChannelFactory<ITest> factory = new ChannelFactory<ITest>(new WebHttpBinding(), new EndpointAddress(baseAddress)); factory.Endpoint.Behaviors.Add(new WebHttpBehavior()); ITest proxy = factory.CreateChannel(); Console.WriteLine("Result of Get operation: {0}", proxy.GetComplex("This was via GET")); Console.WriteLine("Result of EchoPost: {0}", proxy.Process(new MyComplexObject(123, "This was via POST"))); ((IClientChannel)proxy).Close(); factory.Close(); Console.WriteLine("Press ENTER to close service"); Console.ReadLine(); host.Close(); } }

 

 

2. You can use enums in the URL template, as long as they're not used in one of the segments of the URL (i.e., they can be used as query string values). The WebHttpBinding doesn't support the TypeConverter feature. The example below shows the usage of an enum value in the template:

 

 

 

 

//WebHttpBinding issues - enums on GET

public class Post2592218b { [Flags] public enum MyEnum { One = 1, Two = 2, Four = 4, } [ServiceContract] public interface ITest { [OperationContract] [WebGet(UriTemplate = "/input?value={value}")] string Process(MyEnum value); } public class Service : ITest { public string Process(MyEnum value) { return value.ToString(); } } static void SendRequest(string uri) { Console.WriteLine("Request to {0}", uri); HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(uri); req.Method = "GET"; HttpWebResponse resp = null; try { resp = (HttpWebResponse)req.GetResponse(); } catch (WebException e) { resp = (HttpWebResponse)e.Response; } Console.WriteLine("HTTP/{0} {1} {2}", resp.ProtocolVersion, (int)resp.StatusCode, resp.StatusDescription); Console.WriteLine(new StreamReader(resp.GetResponseStream()).ReadToEnd()); Console.WriteLine(); resp.Close(); } 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(ITest), new WebHttpBinding(), ""); endpoint.Behaviors.Add(new WebHttpBehavior()); host.Open(); Console.WriteLine("Host opened"); SendRequest(baseAddress + "/input?value=3"); SendRequest(baseAddress + "/input?value=Two"); Console.WriteLine("Press ENTER to close service"); Console.ReadLine(); host.Close(); } }