private PdfOCRResponse HandleOCRPDF(PDFApi pdfApiInstance, PDFOCRActionConfiguration actionConfiguration, FileToProcess fileToProcess, string fileID, int workerNumber)
{
// First get the number of page of the PDF
PdfGetInfoResponse getInfoResponse = PassportPDFRequestsUtilities.SendGetInfoRequest(pdfApiInstance, new PdfGetInfoParameters(fileID), workerNumber, fileToProcess.FileAbsolutePath, FileOperationStartEventHandler);// todo: use appropriate event handler
if (getInfoResponse.Error != null)
{
return(null);
}
PdfOCRParameters ocrParameters = PassportPDFParametersUtilities.GetOCRParameters(actionConfiguration, fileID);
int pageCount = getInfoResponse.PageCount;
int chunkLength = Math.Min(getInfoResponse.PageCount, FrameworkGlobals.PAGE_CHUNK_LENGTH_FOR_OCR_ACTION);
int chunkCount = getInfoResponse.PageCount > FrameworkGlobals.PAGE_CHUNK_LENGTH_FOR_OCR_ACTION ? (int)Math.Ceiling((double)getInfoResponse.PageCount / FrameworkGlobals.PAGE_CHUNK_LENGTH_FOR_OCR_ACTION) : 1;
PdfOCRResponse ocrResponse = null;
for (int chunkNumber = 1; chunkNumber <= chunkCount; chunkNumber++)
{
ocrParameters.PageRange = PassportPDFParametersUtilities.GetChunkProcessingPageRange(pageCount, chunkLength, chunkNumber, chunkCount);
ocrResponse = PassportPDFRequestsUtilities.SendOCRRequest(pdfApiInstance, ocrParameters, workerNumber, fileToProcess.FileAbsolutePath, ocrParameters.PageRange, pageCount, FileChunkProcessingProgressEventHandler);
if (_cancellationPending || ocrResponse == null)
{
return(ocrResponse);
}
}
return(ocrResponse);
}
public static PdfOCRResponse SendOCRRequest(PDFApi apiInstance, PdfOCRParameters ocrParameters, int workerNumber, string inputFilePath, string pageRange, int pageCount, OperationsManager.ChunkProgressDelegate chunkProgressEventHandler)
{
Exception e = null;
int pausems = 5000;
for (int i = 0; i < FrameworkGlobals.MAX_RETRYING_REQUESTS; i++)
{
chunkProgressEventHandler.Invoke(workerNumber, inputFilePath, pageRange, pageCount, i);
try
{
PdfOCRResponse response = apiInstance.OCR(ocrParameters);
return(response);
}
catch (Exception ex)
{
if (i < FrameworkGlobals.MAX_RETRYING_REQUESTS - 1)
{
Thread.Sleep(pausems); //marking a pause in case of cnx temporarily out and to avoid overhead.
pausems += 2000;
}
else
{//last iteration
e = ex;
}
}
}
throw e;
}
