Here’s an example of how PDF files could be handled on Docker using Ghostscript, though the same idea could be adopted for any third party conversion tool.<\/p>\n
Note that this is using SoftekBarcodeNetStandard from NuGet<\/a>.<\/p>\n 1. Add the following to Dockerfile to install Ghostscript<\/strong><\/p>\n RUN apt-get update && apt-get install -y ghostscript<\/p>\n 2. Use code similar to the following<\/strong><\/p>\n SoftekBarcodeNetStandard.BarcodeReader barcode = new SoftekBarcodeNetStandard.BarcodeReader();<\/p>\n \/\/ This assumes that the input file is in a stream but it should be easy to adapt for a file already on disk int n;<\/p>\n if (imageFile.ContentType == “application\/pdf”) \/\/ Save the stream to disk – miss if file already available \/\/ Temp file for the TIF \/\/ Call gs to convert from PDF to TIF \/\/ Scan the barcode from the TIF \/\/ Delete the temp files – maybe not for the PDF if not using stream input }
\n\/\/ IFormFile imageFile
\nStream s = imageFile.OpenReadStream();<\/p>\n
\n{
\nString pdfFile = System.IO.Path.GetTempFileName();<\/p>\n
\nvar fileStream = System.IO.File.Create(pdfFile);
\ns.CopyTo(fileStream);
\nfileStream.Close();<\/p>\n
\nString tifFile = System.IO.Path.GetTempFileName();<\/p>\n
\nResult = ShellHelper.Bash(“gs -dNOPAUSE -r300 -sDEVICE=tiffscaled24 -sCompression=lzw -dBATCH -sOutputFile=” + tifFile + ” ” + pdfFile);<\/p>\n
\nn = barcode.ScanBarCode(tifFile);<\/p>\n
\nSystem.IO.File.Delete(pdfFile);
\nSystem.IO.File.Delete(tifFile);<\/p>\n
\nelse
\n{
\nn = barcode.ScanBarCodeFromStream(s);
\n}<\/p>\n