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Build pdf downloader in Flex/As3 through java container

Posted on 2011-03-25
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Last Modified: 2012-05-11
Hi there,

I need help in building a pdf downloader in flex for a webpage that has java script handling the pdf presentation in page. The exact page is like this: link

I have this class for downloading simple stuff but the thing is: I want it to be able to download the pdf from that page so that I can, in future, automatize it to crawl for all pages. Can anyone help me build the code in flex/as3 for the pdf downloading?



THanks in advance!
package classes
	{
		import flash.display.Sprite;
		import flash.net.FileReference;
		import flash.net.URLRequest;
		import flash.net.URLRequestMethod;
		import flash.net.URLVariables;
		
		public class DownloadFileExample extends Sprite
		{
			private var fileToDownload:FileReference;
			public function DownloadFileExample()
			{
				var request:URLRequest = new URLRequest();
				request.url = "http://www.in.gov.br/visualiza/index.jsp?data=25/03/2011&jornal=1&pagina=2&totalArquivos=224";
				request.method = URLRequestMethod.GET;
				request.data = new URLVariables("id=2");
				fileToDownload = new FileReference();
				try
				{
					fileToDownload.download(request, "file2.pdf");
				}
				catch (error:Error)
				{
					trace("Unable to download file.");
				}
			}
		}
	}

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Question by:C_Schlottfeldt
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LVL 29

Expert Comment

by:dgofman
ID: 35219625
Do you want to download and save on disk or open via Google Docs / Adobe Viewer or open in the Flash Player?
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Expert Comment

by:dgofman
ID: 35219677
I know two products for working with PDF file

1) import PDF file http://www.adobe.com/products/flashpaper/
2) generate PDF file http://alivepdf.bytearray.org/

Check both
David
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Author Comment

by:C_Schlottfeldt
ID: 35223599
I want to download and save on disk, like a download manager.... pdf is just a format of the file to download in this case....
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Expert Comment

by:dgofman
ID: 35223630
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Author Comment

by:C_Schlottfeldt
ID: 35223666
The code works just as the one above, the problem is that I cant download the file because the file is called directly by a javascript function (I think...). To see it try the link : http://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=1&pagina=1&data=25/03/2011
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LVL 29

Expert Comment

by:dgofman
ID: 35223757
Hi C_Schlottfeldt,
The link what you are providing is not a PDF file, looks like its servlet.
And on the server side they are implementing validation to download outside the domain.

Example:

<html><head><title>INPDFViewer (application/pdf Object)</title></head><body marginwidth="0" marginheight="0"><embed height="100%" width="100%" name="plugin" src="http://www.in.gov.br/servlet/INPDFViewer?jornal=1&pagina=1&data=25/03/2011&captchafield=firistAccess" type="application/pdf"></body></html>

This how its loading PDF file on the web, if you will create HTML file and try to login from your domain you will get Errors.

Nothing wrong in your ActionScript code but you need to know FTP path to PDF file.

Sorry,
David
0
 
LVL 29

Expert Comment

by:dgofman
ID: 35223784
Open in the browser your link and save on the desktop.
Open HTML page using any browsers

Lista de erros:

- Sessão expirada ou tentativa de acesso direto ao componente.
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Author Comment

by:C_Schlottfeldt
ID: 35223882
I saw that error too. Do you know if there is any way to find out the FTP path to the pdf considering the information above ??
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Accepted Solution

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dgofman earned 500 total points
ID: 35224066
Its hard I check via Fiddler and Firefox/FireBug. I didn't see the direct request to FTP server or file.
But you can get this file from Temporary Temp Directory/Cache upload to your server and provide link to your customers. I attached that file.
INPDFViewer-1-.pdf
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Author Comment

by:C_Schlottfeldt
ID: 35224144
Thanks alot! That's indeed a clever workaround !!!! I'll try work that way but I'm gonna wait a little more to see if anyone else can contribute to discussion before closing the question, ok ?
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Expert Comment

by:dgofman
ID: 35224149
fine!
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Expert Comment

by:dgofman
ID: 35224153
but I don't think if anyone can find way downloading corrupted stream/file :)
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Author Closing Comment

by:C_Schlottfeldt
ID: 35236480
Very good solution
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