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Message from discussion Securing uploaded documents
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Dan  
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 More options Jun 2 2010, 8:49 am
Newsgroups: microsoft.public.inetserver.asp.general
From: "Dan" <n...@worldofspack.com>
Date: Wed, 2 Jun 2010 13:49:12 +0100
Local: Wed, Jun 2 2010 8:49 am
Subject: Re: Securing uploaded documents
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"Bwig Zomberi" <zomberiMAPSONNOS...@gmail.com> wrote in message

news:hu5ein$4qs$1@speranza.aioe.org...

> Dean g wrote:
>> Damn, 2 out of 3 problems solved is still good.

>> Thanks for the help guys, i just wish i knew why half the pdf
>> files display garbage on the screen even though they are
>> genuine pdf's. i guess thats a question for another group
>> though.

> I had this problem with Opera. In a newer version, it got solved.

> Just ensure that you set the content type properly on the server-side and
> you are not writing anything other than what is in the PDF to the browser.
> To be sure that the entire ASP code is between one set of <% and %>. Do
> not use nested code. Do not write any HTML or set any cookies.

> On the client side, ensure that Adobe Reader is installed properly and
> plugins are available for all browsers.

> If the problems persist, then it is problem with the PDFs. You could go to
> alt.txt.pdf. However, you will need to host the PDF and provide a link so
> they can check it out.

The other thing you can do is use Response.Buffer = true, and then prior to
sending the headers clear the buffer first just in case there are any CR/LF
characters from inline ASP above that piece of code. Or just make sure you
always put inline ASP code fully inline, eg.

<%
blah blah
%>
<%
more blah
write headers
write binary data
%>

will actually put a single CR/LF combination before the data, because there
is a CRLF outside of the ASP tags. The same can be written as

<%
blah blah
%><%
more blah
write headers
write binary data
%>

and not insert the CR/LF.

It's also worth checking this wherever you send out a DOCTYPE headers in
normal HTML, if the DOCTYPE isn't on the first line of the output then some
browsers will ignore it.

--
Dan


 
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