private void ExecuteImpl()
{
Exception err = null;
bool fileOpenError = false;
try {
OpenLocalStream();
} catch (UnauthorizedAccessException e) {
err = e;
error = HttpFileDownloadErrors.UnauthorizedFileAccess;
} catch (IOException e) {
err = e;
error = HttpFileDownloadErrors.SharingViolation; // Probably
} catch (Exception e) {
err = e;
error = HttpFileDownloadErrors.Unknown;
}
if (error != HttpFileDownloadErrors.None)
{
fileOpenError = true;
}
if (err == null)
{
try {
InitWebClient();
wc.DownloadFileAsync(remoteUri, localStream);
} catch (Exception e) {
err = e;
}
}
if (err != null)
{
//Console.WriteLine ("DT: {0}", err.Message);
if (!fileOpenError)
{
CloseLocalStream(true);
}
DestroyWebClient();
SetStatus(TaskStatus.Failed);
OnTaskCompleted(err, false);
}
}
private void OnDownloadFileCompletedHandler(object sender,
AsyncCompletedEventArgs e)
{
bool retry = false;
lock (SyncRoot) {
executing = false;
TaskStatus newStatus = Status;
try {
if (e.Error != null) {
Hyena.Log.WarningFormat ("HttpDownloadTask {0} Error: {1}", this.Name, e.Error);
WebException we = e.Error as WebException;
if (we != null) {
if(we.Status == WebExceptionStatus.ProtocolError) {
HttpWebResponse resp = we.Response as HttpWebResponse;
if (resp != null) {
httpStatus = resp.StatusCode;
// This is going to get triggered if the file on disk is complete.
// Maybe request range-1 and see if a content length of 0 is returned.
if (resp.StatusCode ==
HttpStatusCode.RequestedRangeNotSatisfiable) {
if (rangeError++ == 0) {
retry = true;
}
}
}
}
}
if (!retry) {
error = HttpFileDownloadErrors.HttpError;
newStatus = TaskStatus.Failed;
}
} else if (modified > 0) {
if (modified == 1) {
retry = true;
} else {
newStatus = TaskStatus.Failed;
}
} else if (canceled) {
newStatus = TaskStatus.Cancelled;
} else if (paused) {
newStatus = TaskStatus.Paused;
} else if (stopped) {
newStatus = TaskStatus.Stopped;
} else {
newStatus = TaskStatus.Succeeded;
}
} catch/* (Exception ex)*/ {
//Console.WriteLine ("Error__________________{0}", ex.Message);
} finally {
if (retry) {
CloseLocalStream (true);
DestroyWebClient ();
ExecuteImpl ();
} else if (SetCompleted ()) {
switch (newStatus) {
case TaskStatus.Cancelled: goto case TaskStatus.Failed;
case TaskStatus.Failed:
CloseLocalStream (true);
break;
case TaskStatus.Paused:
completed = false;
goto case TaskStatus.Succeeded;
case TaskStatus.Stopped: goto case TaskStatus.Succeeded;
case TaskStatus.Succeeded:
CloseLocalStream (false);
break;
default: goto case TaskStatus.Succeeded;
}
DestroyWebClient ();
SetStatus (newStatus);
OnTaskCompleted (e.Error, canceled);
if (mre != null) {
mre.Set ();
}
}
}
}
}
private void ExecuteImpl()
{
Exception err = null;
bool fileOpenError = false;
try {
OpenLocalStream ();
} catch (UnauthorizedAccessException e) {
err = e;
error = HttpFileDownloadErrors.UnauthorizedFileAccess;
} catch (IOException e) {
err = e;
error = HttpFileDownloadErrors.SharingViolation; // Probably
} catch (Exception e) {
err = e;
error = HttpFileDownloadErrors.Unknown;
}
if (error != HttpFileDownloadErrors.None) {
fileOpenError = true;
}
if (err == null) {
try {
InitWebClient ();
wc.DownloadFileAsync (remoteUri, localStream);
} catch (Exception e) {
err = e;
}
}
if (err != null) {
//Console.WriteLine ("DT: {0}", err.Message);
if (!fileOpenError) {
CloseLocalStream (true);
}
DestroyWebClient ();
SetStatus (TaskStatus.Failed);
OnTaskCompleted (err, false);
}
}
private void OnDownloadFileCompletedHandler(object sender,
AsyncCompletedEventArgs e)
{
bool retry = false;
lock (SyncRoot) {
executing = false;
TaskStatus newStatus = Status;
try {
if (e.Error != null)
{
Hyena.Log.WarningFormat("HttpDownloadTask {0} Error: {1}", this.Name, e.Error);
WebException we = e.Error as WebException;
if (we != null)
{
if (we.Status == WebExceptionStatus.ProtocolError)
{
HttpWebResponse resp = we.Response as HttpWebResponse;
if (resp != null)
{
httpStatus = resp.StatusCode;
// This is going to get triggered if the file on disk is complete.
// Maybe request range-1 and see if a content length of 0 is returned.
if (resp.StatusCode ==
HttpStatusCode.RequestedRangeNotSatisfiable)
{
if (rangeError++ == 0)
{
retry = true;
}
}
}
}
}
if (!retry)
{
error = HttpFileDownloadErrors.HttpError;
newStatus = TaskStatus.Failed;
}
}
else if (modified > 0)
{
if (modified == 1)
{
retry = true;
}
else
{
newStatus = TaskStatus.Failed;
}
}
else if (canceled)
{
newStatus = TaskStatus.Cancelled;
}
else if (paused)
{
newStatus = TaskStatus.Paused;
}
else if (stopped)
{
newStatus = TaskStatus.Stopped;
}
else
{
newStatus = TaskStatus.Succeeded;
}
} catch /* (Exception ex)*/ {
//Console.WriteLine ("Error__________________{0}", ex.Message);
} finally {
if (retry)
{
CloseLocalStream(true);
DestroyWebClient();
ExecuteImpl();
}
else if (SetCompleted())
{
switch (newStatus)
{
case TaskStatus.Cancelled: goto case TaskStatus.Failed;
case TaskStatus.Failed:
CloseLocalStream(true);
break;
case TaskStatus.Paused:
completed = false;
goto case TaskStatus.Succeeded;
case TaskStatus.Stopped: goto case TaskStatus.Succeeded;
case TaskStatus.Succeeded:
CloseLocalStream(false);
break;
default: goto case TaskStatus.Succeeded;
}
DestroyWebClient();
SetStatus(newStatus);
OnTaskCompleted(e.Error, canceled);
if (mre != null)
{
mre.Set();
}
}
}
}
}
