Streaming webservice call in flex - apache-flex

Question

I am trying to create a file upload in a flex/air application that sends information to a .NET wcf SOAP webservice. The file upload also has to have progress indicating events. The service uses a Stream as a MessageBodyMember to allow streaming upload. My input looks a little like this:
[MessageContract]
public class SendFileRequestMessage : IDisposable
{
public string UserName;
[MessageBodyMember(Order = 1)]
public Stream FileData;
}
and the service looks like this:
public interface IFileTransferService
{
[OperationContract]
SendFileResponseMessage SendFile(SendFileRequestMessage request);
}
Now when i create a proxy class in VS2010 i get a Stream object for FileData. If I do the same in Flash Builder 4.7 the FileData is interpreted as a ByteArray. I already looked into FileUpload and UrlLoader in my client but i can't get the body member set. My action script now looks like this
not working
var dataToSave:XML = <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:q0="http://mystuff/uploadservice/v1"><soapenv:Body><q0:SendFile/></soapenv:Body></soapenv:Envelope>
var request:URLRequest = new URLRequest("http://localhost:31454/Uploadhandler.svc");
request.requestHeaders = new Array(new URLRequestHeader("SOAPAction", "http://mystuff/uploadservice/v1/IFileTransferService/SendFile"));
request.data = dataToSave;
request.contentType = "text/xml; charset=utf-8";
request.method = URLRequestMethod.POST;
var loader:URLLoader = new URLLoader();
loader.load(request);
So how can do a streaming file upload to a soap service from flex? Any help would be very appreciated.

Answer 1

I'm not familiar with .NET SOAP model, but if it expects standard http content dispositions for file data you can try getting FileReference object for your file and then pass your URLRequiest in its upload method. In your case this could be like
... Create class level variable ...
var fr:FileReference = new FileReference();
... Obtain file reference somewhere ...
//Set handlers for Filereference events
fr.browse(); //Obtain actual file reference
... Somewhere in selectHandler chain....
var dataToSave:XML = <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:q0="http://mystuff/uploadservice/v1"><soapenv:Body><q0:SendFile/></soapenv:Body></soapenv:Envelope>
var request:URLRequest = new URLRequest("http://localhost:31454/Uploadhandler.svc");
request.requestHeaders = new Array(new URLRequestHeader("SOAPAction", "http://mystuff/uploadservice/v1/IFileTransferService/SendFile"));
request.data = dataToSave;
request.contentType = "text/xml; charset=utf-8";
request.method = URLRequestMethod.POST;
//Do POST
fr.upload(request);
This Documentation contains examples for using FileReference.