I have developed a REST WCF service method as following:
[OperationContract]
[WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedRequest, RequestFormat = WebMessageFormat.Xml, ResponseFormat = WebMessageFormat.Xml, UriTemplate = "/Details")]
DetailData GetDetails(TestData requst);
[DataContract]
public class TestData
{
[DataMember]
public string DetailData { get; set; }
}
Now I am trying to invoke the service using following client code:
ASCIIEncoding encoding = new ASCIIEncoding();
string testXml = "<TestData>" +
"<DetailData>" +
"4000" +
"</DetailData>" +
"</TestData>";
string postData = testXml.ToString();
byte[] data = encoding.GetBytes(postData);
string url = "http://localhost/WCFRestService.svc/bh/Details";
string strResult = string.Empty;
// declare httpwebrequet wrt url defined above
HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(url);
// set method as post
webrequest.Method = "POST";
// set content type
webrequest.ContentType = "text/xml";
// set content length
webrequest.ContentLength = data.Length;
// get stream data out of webrequest object
Stream newStream = webrequest.GetRequestStream();
newStream.Write(data, 0, data.Length);
newStream.Close();
//Gets the response
WebResponse response = webrequest.GetResponse();
//Writes the Response
Stream responseStream = response.GetResponseStream();
StreamReader sr = new StreamReader(responseStream);
string s = sr.ReadToEnd();
I am getting the following error :
"The remote server returned an error: (400) Bad Request"
I could successfully call another service method where "GET" verb is being used. But the above client code for invoking the service using "POST" verb is not working. I think, I am missing something in Client code.
What could be the problem?
Try changing
WebMessageBodyStyle.WrappedRequest
to
WebMessageBodyStyle.Bare
Related
I'm trying to send some data to wcf server using restsharp and xamarine and get return value.Here's code on server side:
public interface IRestService
{
[OperationContract(Name = "Login")]
[WebInvoke(UriTemplate = "/Login/", Method = "POST", BodyStyle = WebMessageBodyStyle.Wrapped, ResponseFormat = WebMessageFormat.Json,RequestFormat = WebMessageFormat.Json)]
Boolean Login(String username);
and implementation of Login:
Boolean IRestService.Login(string username)
{
if (string.IsNullOrEmpty(username))
return false;
else
return true;
}
here is how i'm trying to make connection on client side:
var client = new RestClient("http://192.168.0.187:9226/RestService.svc");
client.AddDefaultHeader("ContentType", "application/json");
var request = new RestRequest(String.Format("/Login/", "198440"));
request.Method = Method.POST;
request.AddParameter("username", "blabla");
request.RequestFormat = DataFormat.Json;
IRestResponse response1 = client.Execute<Boolean>(request);
When I'm tracing my wcf, i keep getting "The incoming message has an unexpected message format 'Raw'. The expected message formats for the operation are 'Xml', 'Json'."
Any help?
You should not use AddParamater. This create a form encoded body for the POST
instead:
request.RequestFormat = DataFormat.Json;
request.AddBody(new { "username" = "blabla"}));
Have created a Restful WCF service with webHTTPBinding
While consuming the service in my client application, am facing with this error
The remote server returned an error: (400) Bad Request. (Have already tried solution like setting maxReceivedMessageSize and others mentioned online)
Scenario :
2 methods in client side
1) Working fine ** GET request**
private static void GenerateGETRequest()
{
HttpWebRequest GETRequest = (HttpWebRequest)WebRequest.Create(url);
GETRequest.Method = "GET";
GETRequest.ContentType = "application/json";
Console.WriteLine("Sending GET Request");
HttpWebResponse GETResponse = (HttpWebResponse)GETRequest.GetResponse();
Stream GETResponseStream = GETResponse.GetResponseStream();
StreamReader sr = new StreamReader(GETResponseStream);
Console.WriteLine("Response from Restful Service");
Console.WriteLine(sr.ReadToEnd());
}
2) Exception ****** (PUT request with response)**
private static void GeneratePUTRequest()
{
byte[] dataByte = CreateJSONObject(Object); //this custom method converts object that I pass to JSON serialized object
HttpWebRequest PUTRequest = (HttpWebRequest)HttpWebRequest.Create(Url);
PUTRequest.Method = "PUT";
**//PUTRequest.ContentType = "application/json"; //error 400 when un-commenting this**
PUTRequest.ContentLength = dataByte.Length;
Stream PUTRequestStream = PUTRequest.GetRequestStream();
PUTRequestStream.Write(dataByte, 0, dataByte.Length);
**HttpWebResponse PUTResponse = (HttpWebResponse)PUTRequest.GetResponse(); // this is where i get the exception when un-commenting above line**
Stream PUTResponseStream = PUTResponse.GetResponseStream();
StreamReader sr = new StreamReader(PUTResponseStream);
Console.WriteLine("Response from Restful Service");
Console.WriteLine(sr.ReadToEnd());
}
2 method throws the xception when i un-comment the line mentioned in the comment (in code). The place where exception is thrown is also mentioned in the comment (in code above).
The second method works fine with desired output (if i comment the mentioned line).
Additional resource
[OperationContract]
[WebInvoke(Method = "PUT",
RequestFormat = WebMessageFormat.Json,
ResponseFormat = WebMessageFormat.Json,
BodyStyle = WebMessageBodyStyle.Wrapped,
UriTemplate = "Controller")]
In order to send data through a POST or PUT, you need to construct your data correctly according to the WCF service. Here is basically what you need (Just change the POST to PUT for your application)
1) WCF Service Interface
[OperationContract]
[WebInvoke(Method = "POST",
UriTemplate = "GetData",
RequestFormat = WebMessageFormat.Xml,
BodyStyle = WebMessageBodyStyle.Bare)]
string GetData(DataRequest parameter);
2) WCF Service Implementation
public string GetData(DataRequest parameter)
{
//Do stuff
return "your data here";
}
3) Data Contract in your WCF service (In this case it's DataRequest)
[DataContract(Namespace = "YourNamespaceHere")]
public class DataRequest
{
[DataMember]
public string ID{ get; set; }
[DataMember]
public string Data{ get; set; }
}
4) Client sending the data must have the data constructed properly! (C# console app in this case)
static void Main(string[] args)
{
ASCIIEncoding encoding = new ASCIIEncoding();
string SampleXml = "<DataRequest xmlns=\"YourNamespaceHere\">" +
"<ID>" +
yourIDVariable +
"</ID>" +
"<Data>" +
yourDataVariable +
"</Data>" +
"</DataRequest>";
string postData = SampleXml.ToString();
byte[] data = encoding.GetBytes(postData);
string url = "http://localhost:62810/MyService.svc/GetData";
string strResult = string.Empty;
// declare httpwebrequet wrt url defined above
HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(url);
// set method as post
webrequest.Method = "POST";
// set content type
webrequest.ContentType = "application/xml";
// set content length
webrequest.ContentLength = data.Length;
// get stream data out of webrequest object
Stream newStream = webrequest.GetRequestStream();
newStream.Write(data, 0, data.Length);
newStream.Close();
//Gets the response
WebResponse response = webrequest.GetResponse();
//Writes the Response
Stream responseStream = response.GetResponseStream();
StreamReader sr = new StreamReader(responseStream);
string s = sr.ReadToEnd();
return s;
}
Here is how I try to call the DELETE method from my WCF service:
string tmpUrl1 = "http://localhost:1234/MyService.svc/EndPoint/MyMethod";
WebRequest request1 = WebRequest.Create(tmpUrl1);
request1.Method = "DELETE";
byte[] byteArray1 = Encoding.UTF8.GetBytes("{\"idName\":" + newIdName + "}");
request1.ContentType = "application/json";
request1.ContentLength = byteArray1.Length;
Stream dataStream1 = request1.GetRequestStream();
dataStream1.Write(byteArray1, 0, byteArray1.Length);
dataStream1.Close();
WebResponse response1 = request1.GetResponse();
But I get error 400.
Here is the method's name in the wcf:
[OperationContract]
[WebInvoke(
Method = "DELETE",
RequestFormat = WebMessageFormat.Json,
ResponseFormat = WebMessageFormat.Json,
UriTemplate = "/MyMethod/{deleteRP}/",
BodyStyle = WebMessageBodyStyle.Bare
)]
MyClass MyMethod(string deleteRP);
Where am I making a mistake?
Try enabling Tracing on your service and inspect the trace log for the actual error. Also your url address should have something like
"http://localhost:1234/MyService.svc/EndPoint/MyMethod/55"
rather than
"http://localhost:1234/MyService.svc/EndPoint/MyMethod"
UPDATE:
private static byte[] ToByteArrayUsingDataContractSer<T>(T requestBody)
{
byte[] bytes = null;
var serializer1 = new DataContractSerializer(typeof(T));
var ms1 = new MemoryStream();
serializer1.WriteObject(ms1, requestBody);
ms1.Position = 0;
var reader = new StreamReader(ms1);
bytes = ms1.ToArray();
return bytes;
}
Now replace the following line
byte[] byteArray1 = Encoding.UTF8.GetBytes("{\"idName\":" + newIdName + "}");
with
byte[] array = ToByteArrayUsingDataContractSer<string>("{\"idName\":" + newIdName + "}");
I have a simple resftul wcf service. The .svc file looks like this
<%# ServiceHost Service="NameSpace.RestfulService" Factory="System.ServiceModel.Activation.WebServiceHostFactory" %>
The interface method declaration
[OperationContract]
[WebInvoke(Method = "POST", UriTemplate = "test2", RequestFormat = WebMessageFormat.Json,ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare)]
List<MyObj> Test2(MyObj test);
Method implementation
public List<MyObj> Test2(MyObj test)
{
return new List<MyObj>() { new MyObj() { MyObjId = "1", RowVersion = 1 }, new MyObj() { MyObj= "2", RowVersion = 2 } };
}
Method on a wpf client to call the service
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(MyObj));
MemoryStream ms = new MemoryStream();
serializer.WriteObject(ms, new MyObj() { MyObjId = "A", RowVersion = 1 });
string jason = Encoding.Default.GetString(ms.ToArray());
//get a handle to the request stream to write data to it
WebRequest myRequest = WebRequest.Create("http://localhost/MyService.svc/test2");
myRequest.Method = "POST";
myRequest.ContentType = "application/jason; charset=utf-8";
StreamWriter sw = new StreamWriter(myRequest.GetRequestStream());
sw.Write(jason);
sw.Close();
//get a handle to the response stream from the server to read the response
WebResponse myResponse = myRequest.GetResponse();
DataContractJsonSerializer RecData = new DataContractJsonSerializer(typeof(List<MyObj>));
var result = (List<MyObj>)RecData.ReadObject(myResponse.GetResponseStream());
When I try to get the RequestStream "myRequest.GetRequestStream()" it says bad request error 400.
Any idea what might be causing this error?
Thanks
Your content type is "application/jason; charset=utf-8". JSON's MIME-type is "application/json" (no 'a'). This is my likely why it 400's when you send the initial headers (which is done when you call GetRequestStream) because the WCF service doesn't recognize the content-type and immediately rejects the request.
[WebInvoke(Method = "PUT", UriTemplate = "users/{username}")]
[OperationContract]
void PutUser(string username, User newValue);//update a user
I have a update user method defined as showed above. Then I use a HttpWebRequest to test the method, but how can I pass the User object with this HttpWebResquest?
The following code is what I got so far.
string uri = "http://localhost:8080/userservice/users/userA";
HttpWebRequest req = WebRequest.Create(uri) as HttpWebRequest;
req.Method = "PUT";
req.ContentType = " application/xml";
req.Proxy = null;
string uri = "http://localhost:8080/userservice/users/userA";
string user = "<User xmlns=\"http://schemas.datacontract.org/2004/07/RESTful\" xmlns:i=\"http://www.w3.org/2001/XMLSchema-instance\"><DOB>2009-01-18T00:00:00</DOB><Email>userA#example.com</Email><Id>1</Id><Name>Sample User</Name><Username>userA</Username></User>";
byte[] reqData = Encoding.UTF8.GetBytes(user);
HttpWebRequest req = WebRequest.Create(uri) as HttpWebRequest;
req.Method = "POST";
req.ContentType = " application/xml";
req.ContentLength = user.Length;
req.Proxy = null;
Stream reqStream = req.GetRequestStream();
reqStream.Write(reqData, 0, reqData.Length);
HttpWebResponse resp = req.GetResponse() as HttpWebResponse;
string code = resp.StatusCode.ToString();
//StreamReader sr = new StreamReader( resp.GetResponseStream());
//string respStr = sr.ReadToEnd();
Console.WriteLine(code);
Console.Read();
I found the solution, I need to construct the xml string I want to pass and then write it into stream
In WCF/REST you don't pass an object, you pass a message.
If I were doing this, as a first step, I would create a WCF client that interacts with the service. I would examine the messages passed on the wire by the WCF client, and then I'd replicate that message with the HttpWebRequest.