POST request to the WCF service by the use of HttpWebRequest - wcf

Question

My Service Contract
[ServiceContract]
public interface ITsdxService
{
[OperationContract]
[WebGet(UriTemplate="/GetTestCostCentre")]
CostCentre GetTestCostCentre();
[OperationContract]
[WebInvoke(UriTemplate="/SetCostCentre", Method="POST")]
string SetCostCentre(CostCentre cc);
}
public class TsdxService : ITsdxService
{
public CostCentre GetTestCostCentre()
{
CostCentre cc = new CostCentre();
cc.Code = "Test";
cc.Name = "Test Cost Centre";
cc.Description = new byte[] { 12, 34, 89, 240, 66, 87, 189 };
cc.SAPStatus = "Existent";
cc.SAPSiteFolder = "Folder1";
return cc;
}
public string SetCostCentre(CostCentre cc)
{
return cc.Code;
}
}
Then I start this service and try to work with it from different application:
Uri requestUri = new Uri(textBox1.Text + "/tsdx/GetTestCostCentre");
HttpWebRequest request = WebRequest.Create(requestUri) as HttpWebRequest;
XElement root;
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
StreamReader reader = new StreamReader(response.GetResponseStream());
root = XElement.Parse(reader.ReadToEnd());
textBox2.Text = root.ToString();
}
All is ok, I am getting the xml document. But I've faced with problem when I tried to send POST request to this service:
Uri requestUri = new Uri(textBox1.Text + "/tsdx/SetCostCentre");
HttpWebRequest request = WebRequest.Create(requestUri) as HttpWebRequest;
byte[] bytes = Encoding.UTF8.GetBytes(textBox2.Text);
request.ContentLength = bytes.Length;
request.Method = "POST";
Stream dataStream = request.GetRequestStream();
dataStream.Write(bytes, 0, bytes.Length);
dataStream.Close();
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
StreamReader reader = new StreamReader(response.GetResponseStream());
textBox2.Text = reader.ReadToEnd();
}
Exception: The remote server returned an error: (400) Bad Request.
What I did wrong?

Answer 1

Change your client code like this
byte[] bytes = Encoding.UTF8.GetBytes(#"<CostCentre xmlns=""http://schemas.datacontract.org/2004/07/WCF_BadRequestService"">
<Code>String content</Code>
<Description>QmFzZSA2NCBTdHJlYW0=</Description>
<Name>String content</Name>
<SAPSiteFolder>String content</SAPSiteFolder>
<SAPStatus>String content</SAPStatus>
</CostCentre>");
request.ContentLength = bytes.Length;
request.Method = "POST";
request.ContentType = "application/xml";
Now it's fine.
And also i think Java supports WCF BasicHttpBinding, and you can use WCF services using the Java provided tools to generate web-service proxy in an easy supported manner.

Answer 2

Another thing you might want to do is to extend ClientBase to do all the hard work of serializing xml for you. Especially if you want to support more than one message format like json it will make your life a lot easier plus it will make any changes to the interface compile time errors instead of runtime errors.
public class ITsdxServiceProxy : ClientBase<ITsdxService>, ITsdxService {
#region ITsdxService Members
public CostCentre GetTestCostCentre() {
return Channel.GetTestCostCentre();
}
public string SetCostCentre(CostCentre cc) {
return Channel.SetCostCentre(cc);
}
#endregion
}
usage on client side
var proxy = new ITsdxServiceProxy();
var costCenter = proxy.GetTestCostCentre();
Configuration on client side
<system.serviceModel>
<behaviors>
<endpointBehaviors>
<behavior name="web">
<webHttp />
</behavior>
</endpointBehaviors>
</behaviors>
<client>
<endpoint
address="Root address for rest service"
binding="webHttpBinding"
behaviorConfiguration="web"
contract="FullyQualifiedNameOfInterface.ITsdxService">
</endpoint>
</client>
</system.serviceModel>