/// <summary>
///
/// </summary>
/// <param name="requestFilter"></param>
internal MimeParser(RequestFilter requestFilter)
{
_RequestFilter = requestFilter;
//iInstanceCount++;
}
private void OnPreRequestHandlerExecute(object sender, EventArgs e)
{
HttpApplication objHttpApplication = sender as HttpApplication;
System.Diagnostics.Debug.Assert(objHttpApplication != null);
HttpRequest objHttpRequest = objHttpApplication.Request;
System.Diagnostics.Debug.Assert(objHttpRequest != null);
if (objHttpRequest != null && UploadHttpModule.IsUploadRequest(objHttpRequest))
{
#if (TRACE)
ThreadLog.WriteLine("Entered OnPreRequestHandlerExecute for an upload request");
#endif
HttpContext objHttpContext = objHttpApplication.Context;
System.Diagnostics.Debug.Assert(objHttpContext != null);
HttpWorkerRequest objHttpWorkerRequest = UploadHttpModule.GetWorkerRequest(objHttpContext);
System.Diagnostics.Debug.Assert(objHttpWorkerRequest != null);
if (objHttpWorkerRequest != null)
{
//long lContentLength = objHttpRequest.ContentLength;
long lContentLength = long.Parse(objHttpWorkerRequest.GetKnownRequestHeader(HttpWorkerRequest.HeaderContentLength), CultureInfo.InvariantCulture);
if (lContentLength <= 0) //This is for Flash 8 FileReference which tests an empty post before sending a large upload
{
#if (TRACE)
ThreadLog.WriteLine("No content, maybe Flash");
#endif
HealthMonitoringManager.LogSucessEvent(
Resources.ExceptionZeroContentLength,
null, //<- no upload data yet
UploadRequestSuccessEvent.RuntimeUploadSuccessZeroContentLength);
objHttpApplication.Response.StatusCode = 200; //OK
objHttpApplication.CompleteRequest();
//See: http://support.microsoft.com/kb/312629
//objHttpApplication.Response.End();
return;
}
//Initialize an upload monitor
string sUploadID = UploadHttpModule.GetUploadID(objHttpRequest);
if (String.IsNullOrEmpty(sUploadID))
{
#if (TRACE)
ThreadLog.WriteLine("No upload ID");
#endif
HttpException objHttpException = new HttpException(400, Resources.ExceptionNullOrEmptyUploadId);
HealthMonitoringManager.LogErrorEvent(
Resources.ExceptionNullOrEmptyUploadId,
null, //<- no upload data yet
UploadRequestErrorEvent.RuntimeErrorMissingUploadID,
objHttpException);
UploadHttpModule.CloseConnectionAfterError(objHttpApplication.Response);
throw objHttpException;
//See comment in relation with MaxRequestLength here below
//objHttpApplication.Response.StatusCode = 400; //Bad request
//objHttpApplication.Response.StatusDescription = Resources.ExceptionNullOrEmptyUploadId;
//objHttpApplication.Response.Write(String.Format(Resources.Culture, Resources.ErrorPage, 400, Resources.ExceptionNullOrEmptyUploadId));
//objHttpApplication.CompleteRequest();
//See: http://support.microsoft.com/kb/312629
//objHttpApplication.Response.End();
}
UploadData objUploadData = UploadMonitor.SetUploadData(objHttpContext, sUploadID);
System.Diagnostics.Debug.Assert(objUploadData != null);
//Check whether we should read MaxRequestLength from httpRuntime section of web.config (true)
bool bMaximizeRequestLength = UploadHttpModule.GetForceHttpMaxRequestLength(objHttpRequest);
//Check the upload size and end request if file is too big
long lMaxRequestLength = UploadHttpModule.GetMaxRequestLengthBytes(objHttpContext, bMaximizeRequestLength);
if ((lMaxRequestLength >= 0) && (lContentLength > lMaxRequestLength))
{
#if (TRACE)
ThreadLog.WriteLine("Post request is too large");
#endif
HttpException objHttpException = new HttpException(413, Resources.ExceptionPostTooLarge);
HealthMonitoringManager.LogErrorEvent(
Resources.ExceptionPostTooLarge,
objUploadData,
UploadRequestErrorEvent.RuntimeErrorPostTooLarge,
objHttpException);
objUploadData.ReportFailed(objHttpException);
UploadHttpModule.CloseConnectionAfterError(objHttpApplication.Response);
throw objHttpException;
//There are 3 possible options
//1) Do nothing and let httpRuntime/maxRequestlength do its job
//2) Do something like
// objHttpApplication.Response.StatusCode = 413;
// objHttpApplication.Response.StatusDescription = Resources.ExceptionPostTooLarge;
// objHttpApplication.Response.Write(String.Format(Resources.Culture, Resources.ErrorPage, 413, Resources.ExceptionPostTooLarge));
// objHttpApplication.CompleteRequest();
// See: http://support.microsoft.com/kb/312629
// //objHttpApplication.Response.End();
// return;
//3) Raise an HttpException
//Option 1 is no more an option since we have implemented uploadRuntime
//Option 2 sometimes aborts and closes the connection with an IE error page,
//sometimes displays a blank page. When the IE page appears, we get
//an ERROR_INTERNET_CONNECTION_ABORTED, when the blank page is displayed
//the post returns a 413 status code. To get some content we would need
//to write to the response _Input using something like objHttpApplication.Response.Write
//HttpRequest.GetEntireRawContent implements option 3). Actually it triggers
//throw new HttpException(SR.GetString("Max_request_length_exceeded"), null, 0xbbc);
//after calling HttpResponse.CloseConnectionAfterError(). In this case an unhdandled
//exception is thrown abd we can rely on Application_Error and Custom Errors which
//is the best option.
}
#if (TRACE)
ThreadLog.WriteLine("Start parsing upload _Input");
#endif
Encoding objEncoding = objHttpRequest.ContentEncoding;
string sContentType = objHttpRequest.ContentType;
int iPos = sContentType.ToLowerInvariant().IndexOf(Constants.MultiPartBoundary);
if (iPos < 0)
{
#if (TRACE)
ThreadLog.WriteLine("Bad request");
#endif
HttpException objHttpException = new HttpException(400, Resources.ExceptionMalformedContentType);
HealthMonitoringManager.LogErrorEvent(
Resources.ExceptionMalformedContentType,
objUploadData,
UploadRequestErrorEvent.RuntimeErrorMalformedContentType,
objHttpException
);
objUploadData.ReportFailed(objHttpException);
UploadHttpModule.CloseConnectionAfterError(objHttpApplication.Response);
throw objHttpException;
//See comment in relation with MaxRequestLength here above
//objHttpApplication.Response.StatusCode = 400; //Bad request
//objHttpApplication.Response.StatusDescription = Resources.ExceptionMultipartBoundaryNotFound;
//objHttpApplication.Response.Write(String.Format(Resources.Culture, Resources.ErrorPage, 400, Resources.ExceptionMultipartBoundaryNotFound));
//objHttpApplication.CompleteRequest();
//See: http://support.microsoft.com/kb/312629
//objHttpApplication.Response.End();
//return;
}
string sMultiPartBoundary = Constants.BoundaryPrefix + sContentType.Substring(iPos + Constants.MultiPartBoundary.Length);
#if (TRACE)
ThreadLog.WriteLine("Identified boundary = " + sMultiPartBoundary);
#endif
RequestStream objRequestStream = null;
RequestFilter objRequestFilter = null;
try
{
HashAlgorithm objHashAlgorithm = CryptoConfig.CreateFromName(Constants.HashAlgorithmName) as HashAlgorithm;
//objHashAlgorithm.Initialize(); Done in RequestFilter
objRequestStream = new RequestStream(objHttpWorkerRequest);
objRequestFilter = new RequestFilter(objRequestStream, objHashAlgorithm, lContentLength, objEncoding, sMultiPartBoundary, objUploadData);
#if (TRACE)
ThreadLog.WriteLine("Started parsing");
#endif
//Parse the request to filter input files
MimeParser objMimeParser = new MimeParser(objRequestFilter);
objMimeParser.Parse();
//Get the filtered request
byte[] arrFilteredRequest = objRequestFilter.Encoding.GetBytes(objRequestFilter.FilteredRequest);
//Redirect the filtered request
RedirectFilteredRequest(objHttpApplication, objHttpWorkerRequest, arrFilteredRequest);
#if (TRACE)
ThreadLog.WriteLine("Filtered request redirected");
#endif
HealthMonitoringManager.LogSucessEvent(
Resources.MessageUploadCompleted,
objUploadData,
UploadRequestSuccessEvent.RuntimeUploadSuccessCompleted
);
}
catch (Exception Ex)
{
#if (TRACE)
ThreadLog.WriteLine("Parsing error");
#endif
HealthMonitoringManager.LogErrorEvent(
Resources.ExceptionUnhandled + "\r\n" + objHttpWorkerRequest.GetKnownRequestHeader(HttpWorkerRequest.HeaderUserAgent),
objUploadData,
UploadRequestErrorEvent.RuntimeErrorExceptionUnhandled,
Ex);
objUploadData.ReportFailed(Ex);
UploadHttpModule.CloseConnectionAfterError(objHttpApplication.Response);
if ((Ex is HttpException) || (Ex is System.Net.WebException))
{
throw;
}
else
{
throw new HttpException(500, Resources.ExceptionUnhandled, Ex);
}
//objHttpApplication.Response.StatusCode = 500; //Error
//objHttpApplication.Response.StatusDescription = Resources.ExceptionUnhandled;
//objHttpApplication.Response.Write(String.Format(Resources.Culture, Resources.ErrorPage, 500, Ex.Message));
//objHttpApplication.CompleteRequest();
//See: http://support.microsoft.com/kb/312629
//objHttpApplication.Response.End();
}
finally
{
#if (TRACE)
ThreadLog.WriteLine("Disposing of resources");
#endif
if (objRequestFilter != null)
{
objRequestFilter.Dispose();
}
if (objRequestStream != null)
{
objRequestStream.Dispose();
}
if (objUploadData != null)
{
if (objUploadData.ProgressStatus != UploadProgressStatus.Completed)
{
this.DeleteUploadFiles(objUploadData.UploadFiles);
}
//Too soon to release here: let sliding expiration work for us
//UploadMonitor.Release(objHttpContext, objUploadData.UploadId);
}
}
}
#if (TRACE)
ThreadLog.WriteLine("Exit OnPreRequestHandlerExecute");
#endif
}
}