/// <summary>
/// Provides an end method for an asynchronous process.
/// </summary>
/// <param name="result">An IAsyncResult that contains information about the status of the process.</param>
public void EndProcessRequest( IAsyncResult result )
{
// restore the context from the asyncResult.AsyncState
HttpContext context = (HttpContext)result.AsyncState;
try
{
context.Response.Clear();
bool isBinaryFile = (bool)context.Items["isBinaryFile"];
if ( isBinaryFile )
{
var rockContext = new RockContext();
bool requiresViewSecurity = false;
BinaryFile binaryFile = new BinaryFileService( rockContext ).EndGet( result, context, out requiresViewSecurity );
if ( binaryFile != null )
{
//// if the binaryFile's BinaryFileType requires security, check security
//// note: we put a RequiresViewSecurity flag on BinaryFileType because checking security for every file would be slow (~40ms+ per request)
if ( requiresViewSecurity )
{
var currentUser = new UserLoginService( rockContext ).GetByUserName( UserLogin.GetCurrentUserName() );
Person currentPerson = currentUser != null ? currentUser.Person : null;
binaryFile.BinaryFileType = binaryFile.BinaryFileType ?? new BinaryFileTypeService( rockContext ).Get( binaryFile.BinaryFileTypeId.Value );
if ( !binaryFile.IsAuthorized( Authorization.VIEW, currentPerson ) )
{
SendNotAuthorized( context );
return;
}
}
SendFile( context, binaryFile.ContentStream, binaryFile.MimeType, binaryFile.FileName, binaryFile.Guid.ToString("N") );
return;
}
}
else
{
Stream fileContents = (Stream)context.Items["fileContents"];
string physicalContentFileName = context.Items["physicalContentFileName"] as string;
if ( fileContents != null )
{
string mimeType = System.Web.MimeMapping.GetMimeMapping( physicalContentFileName );
string fileName = Path.GetFileName( physicalContentFileName );
SendFile( context, fileContents, mimeType, fileName, "" );
return;
}
}
context.Response.StatusCode = 404;
context.Response.StatusDescription = "Unable to find the requested file.";
}
catch ( Exception ex )
{
ExceptionLogService.LogException( ex, context );
try
{
context.Response.StatusCode = 500;
context.Response.StatusDescription = ex.Message;
context.Response.Flush();
context.ApplicationInstance.CompleteRequest();
}
catch ( Exception ex2 )
{
ExceptionLogService.LogException( ex2, context );
}
}
}
/// <summary>
/// Processes the binary file request.
/// </summary>
/// <param name="context">The context.</param>
private void ProcessBinaryFileRequest( HttpContext context )
{
int fileId = context.Request.QueryString["id"].AsInteger() ?? 0;
Guid fileGuid = context.Request.QueryString["guid"].AsGuid();
if ( fileId == 0 && fileGuid.Equals( Guid.Empty ) )
{
SendNotFound( context );
}
var rockContext = new RockContext();
var binaryFileQuery = new BinaryFileService( rockContext ).Queryable();
if ( fileGuid != Guid.Empty )
{
binaryFileQuery = binaryFileQuery.Where( a => a.Guid == fileGuid );
}
else
{
binaryFileQuery = binaryFileQuery.Where( a => a.Id == fileId );
}
//// get just the binaryFileMetaData (not the file content) just in case we can get the filecontent faster from the cache
//// a null ModifiedDateTime shouldn't happen, but just in case, set it to DateTime.MaxValue so we error on the side of not getting it from the cache
var binaryFileMetaData = binaryFileQuery.Select( a => new
{
BinaryFileType_AllowCaching = a.BinaryFileType.AllowCaching,
BinaryFileType_RequiresSecurity = a.BinaryFileType.RequiresSecurity,
ModifiedDateTime = a.ModifiedDateTime ?? DateTime.MaxValue,
a.MimeType,
a.FileName
} ).FirstOrDefault();
if ( binaryFileMetaData == null )
{
SendNotFound( context );
return;
}
//// if the binaryFile's BinaryFileType requires security, check security
//// note: we put a RequiresSecurity flag on BinaryFileType because checking security for every image would be slow (~40ms+ per image request)
if ( binaryFileMetaData.BinaryFileType_RequiresSecurity )
{
var currentUser = new UserLoginService( rockContext ).GetByUserName( UserLogin.GetCurrentUserName() );
Person currentPerson = currentUser != null ? currentUser.Person : null;
BinaryFile binaryFileAuth = new BinaryFileService( rockContext ).Queryable( "BinaryFileType" ).First( a => a.Guid == fileGuid || a.Id == fileId );
if ( !binaryFileAuth.IsAuthorized( Authorization.VIEW, currentPerson ) )
{
SendNotAuthorized( context );
return;
}
}
byte[] fileContent = null;
// Is it cached
string cacheName = UrlQueryToCachedFileName( context.Request.QueryString, binaryFileMetaData.MimeType );
string physCachedFilePath = context.Request.MapPath( string.Format( "~/App_Data/Cache/{0}", cacheName ) );
if ( binaryFileMetaData.BinaryFileType_AllowCaching && File.Exists( physCachedFilePath ) )
{
//// Compare the File's Creation DateTime (which comes from the OS's clock), adjust it for the Rock OrgTimeZone, then compare to BinaryFile's ModifiedDateTime (which is already in OrgTimeZone).
//// If the BinaryFile record in the database is less recent than the last time this was cached, it is safe to use the Cached version.
//// NOTE: A BinaryFile record is typically just added and never modified (a modify is just creating a new BinaryFile record and deleting the old one), so the cached version will probably always be the correct choice.
DateTime cachedFileDateTime = RockDateTime.ConvertLocalDateTimeToRockDateTime( File.GetCreationTime( physCachedFilePath ) );
if ( binaryFileMetaData.ModifiedDateTime < cachedFileDateTime )
{
// NOTE: the cached file has already been resized (the size is part of the cached file's filename), so we don't need to resize it again
fileContent = FetchFromCache( physCachedFilePath );
}
}
if ( fileContent == null )
{
// If we didn't get it from the cache, get it from the binaryFileService
BinaryFile binaryFile = GetFromBinaryFileService( context, fileId, fileGuid );
if ( binaryFile != null && binaryFile.Data != null )
{
fileContent = binaryFile.Data.Content;
}
// If we got the image from the binaryFileService, it might need to be resized and cached
if ( fileContent != null )
{
// If more than 1 query string param is passed in, assume resize is needed
if ( context.Request.QueryString.Count > 1 )
{
// if it isn't an SVG file, do a Resize
if ( binaryFile.MimeType != "image/svg+xml" )
{
fileContent = GetResized( context.Request.QueryString, fileContent );
}
}
if ( binaryFileMetaData.BinaryFileType_AllowCaching )
{
Cache( fileContent, physCachedFilePath );
}
}
}
if ( fileContent == null )
{
// if we couldn't get the file from the binaryFileServie or the cache, respond with NotFound
SendNotFound( context );
return;
}
// respond with File
context.Response.ContentType = binaryFileMetaData.MimeType;
context.Response.AddHeader( "content-disposition", "inline;filename=" + binaryFileMetaData.FileName );
if ( binaryFileMetaData.BinaryFileType_AllowCaching )
{
// if binaryFileType is set to allowcaching, also tell the browser to cache it for 365 days
context.Response.Cache.SetLastModified( binaryFileMetaData.ModifiedDateTime );
context.Response.Cache.SetMaxAge( new TimeSpan( 365, 0, 0, 0 ) );
}
context.Response.BinaryWrite( fileContent );
context.Response.Flush();
}
