public void GetBlobAsync(string entityId, BlobOperationComplete onComplete)
{
SsdsBlobEntity blob = null;
Exception exception = null;
BackgroundWorker worker = new BackgroundWorker();
worker.DoWork += new DoWorkEventHandler(delegate(object sender, DoWorkEventArgs e)
{
try
{
blob = this.GetBlob(entityId);
}
catch (Exception ex)
{
exception = ex;
}
});
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(delegate(object sender, RunWorkerCompletedEventArgs e)
{
if (onComplete != null)
{
onComplete(blob, exception);
}
});
worker.RunWorkerAsync();
}
public void InsertAsync(SsdsBlobEntity blob, BlobOperationComplete onComplete)
{
Exception exception = null;
BackgroundWorker worker = new BackgroundWorker();
worker.DoWork += new DoWorkEventHandler(delegate(object sender, DoWorkEventArgs e)
{
try
{
this.Insert(blob);
}
catch (Exception ex)
{
exception = ex;
}
});
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(delegate(object sender, RunWorkerCompletedEventArgs e)
{
if (onComplete != null)
{
onComplete(blob, exception);
}
});
worker.RunWorkerAsync();
}
public SsdsBlobEntity GetBlob(string entityId)
{
SsdsBlobEntity blob = null;
WebRequest request = this.CreateRequest(new Uri(String.Format(CultureInfo.InvariantCulture, "{0}/{1}", this.scope, entityId)), HttpVerbs.Get);
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
blob = new SsdsBlobEntity();
blob.Append(response.GetResponseStream());
blob.MimeType = response.Headers[HttpResponseHeader.ContentType];
blob.ContentDisposition = response.Headers["Content-Disposition"];
blob.Version = response.Headers[HttpResponseHeader.ETag];
blob.Id = entityId;
}
return(blob);
}
private HttpWebRequest CreateStreamingRequest(Uri containerUri, string verb, SsdsBlobEntity entity)
{
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(containerUri);
request.Method = verb;
request.ContentLength = entity.Length;
request.ContentType = entity.MimeType;
request.Timeout = 30000;
System.Net.Mime.ContentDisposition contentDisposition = new System.Net.Mime.ContentDisposition();
contentDisposition.FileName = entity.ContentDisposition;
request.Headers["Content-Disposition"] = contentDisposition.ToString();
// Disable buffering by the client so that we get true streaming.
request.AllowWriteStreamBuffering = false;
// Construct the Authorization header for this request manually since there is a known
// issue on HttpWebRequest with streaming authenticated requests which don't use the GET verb.
byte[] credentialBuffer = new UTF8Encoding().GetBytes(String.Format(CultureInfo.InvariantCulture, "{0}:{1}", this.userName, this.password));
request.Headers.Add(HttpRequestHeader.Authorization, "Basic " + Convert.ToBase64String(credentialBuffer));
return(request);
}
private string InsertOrUpdate(SsdsBlobEntity blob, string verb, ConcurrencyPattern concurrencyPattern)
{
string locationResult = String.Empty;
IAsyncResult asyncResult = null;
Exception backgroundError = null;
blob.InitRead();
Uri containerScope = this.scope;
if (verb == HttpVerbs.Put)
{
containerScope = new Uri(String.Format(CultureInfo.InvariantCulture, "{0}/{1}", this.scope, blob.Id));
}
HttpWebRequest uploadRequest = CreateStreamingRequest(containerScope, verb, blob);
if (verb == HttpVerbs.Post)
{
uploadRequest.Headers["Slug"] = blob.Id;
}
if (concurrencyPattern == ConcurrencyPattern.IfMatch)
{
uploadRequest.Headers.Add("if-match", blob.Version);
}
else if (concurrencyPattern == ConcurrencyPattern.IfNoneMatch)
{
uploadRequest.Headers.Add("if-none-match", blob.Version);
}
try
{
using (Stream requestStream = uploadRequest.GetRequestStream())
{
while (blob.ReadBuffer() > 0)
{
requestStream.Write(blob.Buffer, 0, blob.ReadSize);
if (asyncResult == null)
{
asyncResult = uploadRequest.BeginGetResponse((IAsyncResult res) =>
{
HttpWebRequest req = (HttpWebRequest)res.AsyncState;
try
{
using (HttpWebResponse response = (HttpWebResponse)req.EndGetResponse(res))
{
locationResult = response.Headers[HttpResponseHeader.Location];
}
}
catch (Exception ex)
{
backgroundError = ex;
}
}, uploadRequest);
}
}
}
if (asyncResult != null)
{
asyncResult.AsyncWaitHandle.WaitOne();
if (backgroundError != null)
{
throw backgroundError;
}
}
}
catch (WebException ex)
{
string errorMsg = ex.Message;
if (ex.Response != null)
{
using (HttpWebResponse errorResponse = (HttpWebResponse)ex.Response)
{
errorMsg = ReadResponse(errorResponse);
}
}
throw new ApplicationException(errorMsg);
}
return(locationResult);
}
public string Insert(SsdsBlobEntity blob)
{
return(this.InsertOrUpdate(blob, HttpVerbs.Post, ConcurrencyPattern.Always));
}
public void Update(SsdsBlobEntity blob, ConcurrencyPattern concurrencyPattern)
{
this.InsertOrUpdate(blob, HttpVerbs.Put, concurrencyPattern);
}
public string Insert(SsdsBlobEntity blob)
{
SsdsRestFacade facade = this.CreateFacade();
return(facade.Insert(blob));
}
public void UpdateAsync(SsdsBlobEntity blob, BlobOperationComplete onComplete)
{
this.UpdateAsync(blob, ConcurrencyPattern.Always, onComplete);
}
public void Update(SsdsBlobEntity blob, ConcurrencyPattern concurrencyPattern)
{
SsdsRestFacade facade = this.CreateFacade();
facade.Update(blob, concurrencyPattern);
}
public void Update(SsdsBlobEntity blob)
{
Update(blob, ConcurrencyPattern.Always);
}
public void Delete(SsdsBlobEntity entity, ConcurrencyPattern concurrencyPattern)
{
this.Delete(entity.Id, concurrencyPattern, entity.Version);
}
