public ActionResult <PreviewResponse> PreviewPdf(Stream stream, int pageIndex)
{
try
{
if (stream.Length == 0)
{
throw new Exception("Поток не может быть пуст");
}
if (pageIndex < 0)
{
throw new Exception("Номер страницы не может быть меньше 0");
}
_logger.LogDebug($"Start create preview");
PreviewResponse responsePreview = new PreviewResponse();
PreviewFileResponse previewResult = _fileInfoPdf.Preview(stream, pageIndex);
responsePreview.Values.Add(previewResult);
_logger.LogDebug("PdfController.PreviewPdf() OK");
return(Ok(responsePreview));
}
catch (Exception e)
{
_logger.LogError(e.Message);
return(BadRequest(e.Message));
}
}
public ActionResult <ProcessResponse> Process(IFormFile file)
{
_logger.LogDebug($"Process response");
ProcessResponse response = new ProcessResponse();
string fileExtension = Path.GetExtension(file.FileName).Trim('.');
try
{
using (Stream stream = file.OpenReadStream())
{
if (file.Length == 0)
{
throw new Exception("Файл не может быть пуст");
}
if (CheckFileExtension.GetFileExtension(fileExtension) == FileExtension.Extensions.Unknown)
{
throw new Exception("Неподдерживаемый тип файла");
}
if (CheckFileExtension.GetFileExtension(fileExtension) == FileExtension.Extensions.Pdf)
{
ExtractTextFileResponse extractResult = _fileInfoPdf.Extract(stream);
PreviewFileResponse previewResult = _fileInfoPdf.Preview(stream, 0);
ProcessFileResponse result = new ProcessFileResponse {
Image = previewResult.Image, TextValues = extractResult.Values
};
response.Values.Add(result);
return(response);
}
else
{
byte[] resultPdf = _fileInfoPdf.Convert(stream, file.FileName);
using (Stream pdfStream = new MemoryStream(resultPdf))
{
ExtractTextFileResponse extractResult = _fileInfoPdf.Extract(pdfStream);
PreviewFileResponse previewResult = _fileInfoPdf.Preview(pdfStream, 0);
ProcessFileResponse result = new ProcessFileResponse {
Name = file.FileName, Pdf = resultPdf, TextValues = extractResult.Values, Image = previewResult.Image
};
response.Values.Add(result);
}
}
}
_logger.LogDebug("PdfController.Process() OK");
return(Ok(response));
}
catch (Exception e)
{
_logger.LogError(e.Message);
return(BadRequest($"Ошибка обработки файла '{file.FileName}'. Фаил неизвестного формата или файл поврежден"));
}
}
public PreviewFileResponse Preview(Stream stream, int pageIndex)
{
_logger.LogDebug($"Create first page preview from file");
using (MemoryStream streamImage = new MemoryStream())
using (PdfRenderer renderer = new PdfRenderer())
{
renderer.Load(stream);
using (Bitmap bitmapimage = renderer.ExportAsImage(pageIndex))
{
bitmapimage.Save(streamImage, ImageFormat.Jpeg);
PreviewFileResponse previewResult = new PreviewFileResponse {
Image = streamImage.ToArray()
};
_logger.LogDebug($"FileInfoPDFService.Preview....OK");
return(previewResult);
}
}
}