I create a stream containing PDF using ASPOSE.WORD (.net) on server and sent the stream to a client.
On the client I can successfully save the stream to a file if I use Docment.Save but not if I directly save the stream to a file. In the example below file xxxx.pdf is a valid pdf. But file yyyy.pdf is not a valid pdf.
The client will not have the ASPOSE dll. I need to be able to save the stream containing the pdf to disk with using ASPOSE.
var content = await response.Content.ReadAsStreamAsync();
var pdfFileStream = File.Create(@"C:\temp\doc\yyyy.pdf");
await content.CopyToAsync(pdfFileStream);
var pdfDoc = new Document(pdfFileStream);
PdfSaveOptions options = new PdfSaveOptions();
options.TextCompression = PdfTextCompression.None;
pdfDoc.Save(@"C:\temp\doc\xxxx.pdf", options);
On the server the stream is created as follows where buffer contains a docx (word) document.
Stream stream = new MemoryStream();
stream.Write(buffer, 0, buffer.Length);
var pdfDoc = new Document(stream);
pdfDoc.Save(stream, SaveFormat.Pdf);
I discovered the pdf file is partially ok when opening with Word. When opening with word there is an option to do a recover. When I recover the file contains are intact EXCEPT for the following (I am evaluating)
“Evaluation Only. Created with Aspose.Words. Copyright 2003-2017 Aspose Pty Ltd”
So it seems using Document.Save is doing some more then just saving. As I mentioned saving the stream directly to file and the file appears corrupt.
Work around
On the server use Document.Save to write a pdf file to disk
Read the file backing into a stream. On the client side I can save the stream directly to disk and successfully create a PDF file. If I create a Document object with the same stream the result is…
Aspose.Words.UnsupportedFileFormatException: Unknown file format: Unknown
at Aspose.Words.Document.
(Stream 
, LoadOptions )
at Aspose.Words.Document.(Stream , LoadOptions )
at Aspose.Words.Document…ctor(Stream stream, LoadOptions loadOptions)
at Aspose.Words.Document…ctor(Stream stream)
at FileServiceClient.Docx2PdfClient.d__4.MoveNext() in
So it seems streams created by Aspose do not just contain a pdf document.