public override Stream CreateDownloadStream(IStorageProviderSession session, ICloudFileSystemEntry fileSystemEntry)
{
// build the url
string url = GetResourceUrl(session, fileSystemEntry, null);
// get the session creds
ICredentials creds = session.SessionToken as ICredentials;
// Build the service
DavService svc = new DavService();
// create the webrequest
WebRequest request = svc.CreateWebRequest(url, WebRequestMethodsEx.Http.Get, creds.GetCredential(null, null), false, null);
// create the response
WebResponse response = svc.GetWebResponse(request);
// get the data
Stream orgStream = svc.GetResponseStream(response);
BaseFileEntryDownloadStream dStream = new BaseFileEntryDownloadStream(orgStream, fileSystemEntry);
// put the disposable on the stack
dStream._DisposableObjects.Push(response);
// go ahead
return(dStream);
}
private WebResponse CreateDownloadResponse(string url, ICredentials creds)
{
// Build the service
var svc = new DavService();
// create the webrequest
var request = svc.CreateWebRequest(url, WebRequestMethodsEx.Http.Get, creds, false, null);
try
{
// create the response
var response = svc.GetWebResponse(request);
return(response);
}
catch (WebException e)
{
if (e.Response is HttpWebResponse)
{
var code = (e.Response as HttpWebResponse).StatusCode;
if (code == HttpStatusCode.Moved)
{
// get the new uri
var newUri = e.Response.Headers["Location"];
// redo it
return(CreateDownloadResponse(newUri, creds));
}
NetworkCredential networkCredential;
if (code == HttpStatusCode.Unauthorized && (networkCredential = creds as NetworkCredential) != null)
{
var search = new Regex(@"^\w+", RegexOptions.Singleline | RegexOptions.IgnoreCase);
// get authentication method
var authMethod = search.Match(e.Response.Headers["WWW-Authenticate"]).Value;
var newCredentials = new CredentialCache {
{ new Uri((new Uri(url)).GetLeftPart(UriPartial.Authority)), authMethod, networkCredential }
};
// redo it
return(CreateDownloadResponse(url, newCredentials));
}
}
throw;
}
}
