How to open PDF in Delphi’s Webbrowser?

Question

How to open PDF in Delphi’s Webbrowser?

Asked 7 years, 1 month ago

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1

In the Webbrowser of Delphi, run a file .html, which is a PDF reader. I need when the reader is opened to load a PDF stored in a Delphi string variable.

procedure TForm2.Button1Click(Sender: TObject);
var arquivo : string;
begin
 arquivo := 'teste.pdf';
 WebBrowser1.Navigate('C:\zLocal2016\src_Teste\PDF_atual\pdf\web\viewer.html');
end;

Note: I am using the pdf.js library: https://mozilla.github.io/pdf.js/

Have you tried WebBrowser1.Navigate('PDFJS.getDocument('+QuotedStr(teste.pdf)+')'

– Andrey

2017/09/27 at 14:43
And where do I step the . html file path? @Andrey

– user75204

2017/09/27 at 14:48

1 answer

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by Guilherme Nascimento • **98,651** points · Answer 1 · 2017-09-30T01:50:56+00:00

PDF.js will not open in the protocol file:///, due to security issues with XmlHttpRequest (ajax), the only way I see of making this work is to create a protocol of its own (if possible) in Delphi, or to create a mini HTTP server that only for the use of PDF.js

A simple example of an HTTP server would be this:

procedure TMainForm.HTTPServerCommandGet(AContext: TIdContext;
  ARequestInfo: TIdHTTPRequestInfo; AResponseInfo: TIdHTTPResponseInfo);
begin
  AResponseInfo.ContentType := 'text/html';
  AResponseInfo.CharSet := 'utf-8';
  AResponseInfo.ContentStream := TMemoryStream.Create;

  TMemoryStream(AResponseInfo.ContentStream).LoadFromFile(ExtractFilePath(Application.ExeName) + 'pdf.html');
end;

The command contains pdf.js html:

ExtractFilePath(Application.ExeName) + 'pdf.html'