public static void CreateOCREngine()
{
if (_ocrEngine != null)
{
_ocrEngine.Dispose();
}
// Reset the OCR Engine Status
_OcrEngineStatus = OcrEngineStatus.Unset;
var engineTypeString = ServiceHelper.GetSettingValue(ServiceHelper.Key_Ocr_EngineType);
if (string.IsNullOrEmpty(engineTypeString))
{
return;
}
var engineType = OcrEngineType.LEAD;
try
{
// not necessary since we set to LEAD OCR above, but here as an example.
if (engineTypeString.Equals("lead", StringComparison.OrdinalIgnoreCase))
{
engineType = OcrEngineType.LEAD;
}
else if (engineTypeString.Equals("omnipage", StringComparison.OrdinalIgnoreCase))
{
engineType = OcrEngineType.OmniPage;
}
}
catch
{
// Error with engine type
_OcrEngineStatus = OcrEngineStatus.Error;
return;
}
// Check for a location of the OCR Runtime
var runtimeDirectory = ServiceHelper.GetSettingValue(ServiceHelper.Key_Ocr_RuntimeDirectory);
runtimeDirectory = ServiceHelper.GetAbsolutePath(runtimeDirectory);
if (string.IsNullOrEmpty(runtimeDirectory))
{
runtimeDirectory = CheckOCRRuntimeDirectory();
}
// Use LEAD OCR engine
var ocrEngine = OcrEngineManager.CreateEngine(engineType, true);
try
{
// Start it up
ocrEngine.Startup(null, null, null, runtimeDirectory);
_ocrEngine = ocrEngine;
_OcrEngineStatus = OcrEngineStatus.Ready;
}
catch
{
ocrEngine.Dispose();
_OcrEngineStatus = OcrEngineStatus.Error;
System.Diagnostics.Trace.WriteLine("The OCR Engine could not be started. This application will continue to run, but without OCR functionality.");
}
}
public static void InitializeService()
{
/* This method is called by Application_Start of the web service
* We will initialize the global and static objects used through out the demos and
* Each controller will be able to use these same objects.
* Controller-specific initialization is performed in InitializeController
*/
// Set the license, initialize the cache and various objects
// For the license, the TestController.Ping method is used to check the status of this
// So save the values here to get them later
try
{
SetLicense();
IsKernelExpired = RasterSupport.KernelExpired;
}
catch
{
IsKernelExpired = true;
}
if (!IsKernelExpired)
{
// The license is OK, continue
try
{
// This setting disables disk access when creating temp files
if (!GetSettingBoolean(Key_Application_AllowTempFilesFromDisk))
{
RasterDefaults.TempFileMode = LeadTempFileMode.Memory;
}
string tempDirectory = GetSettingValue(ServiceHelper.Key_Application_TempDirectory);
if (!string.IsNullOrEmpty(tempDirectory))
{
tempDirectory = ServiceHelper.GetAbsolutePath(tempDirectory);
RasterDefaults.TemporaryDirectory = tempDirectory;
}
SetMultiplatformSupport();
CreateCache();
PreCacheHelper.CreatePreCache();
SetRasterCodecsOptions(DocumentFactory.RasterCodecsTemplate, 0);
LoadMimeTypesWhitelist();
if (GetSettingBoolean(Key_Document_OnlyAllowedMimeTypes))
{
/*
* If true, all unspecified mimeTypes are automatically considered "denied".
* This effectively means that only mimeTypes in the "allowed" list are accepted.
*/
DocumentFactory.MimeTypes.DefaultStatus = DocumentMimeTypeStatus.Denied;
}
_autoUpdateHistory = GetSettingBoolean(Key_Document_AutoUpdateHistory);
_returnRequestUserData = GetSettingBoolean(Key_Application_ReturnRequestUserData);
}
catch
{
// Let this pass, it is checked again in TestController.Ping
}
CreateOCREngine();
CreateAnnRenderingEngine();
}
}