I have written Java application that, when user click on the button, it 
opens new location in the same window in which it shows new HTML page 
and opens new popup window using window.open() JavaScript code. In the 
popup window Java outputs PDF using following headers:

ContentType - application/pdf
ContentLength - 1000
Content-Disposition - attachment; filename=My.pdf

With above settings IE8 doesn't show open/save dialog for my PDF. Above 
code works fine with IE6, IE7 and Firefox. If I change "attachment" to 
"inline", then IE8 shows PDF in the popup window, but this is not what I 
want. Tested on two PCs and with Acrobat Reader and Foxit PDF clients.

Milan <user@exampl.net> wrote:
>
> I have written Java application that, when user click on the button, it 
> opens new location in the same window in which it shows new HTML page 
> and opens new popup window using window.open() JavaScript code. In the 
> popup window Java outputs PDF using following headers:
>
> ContentType - application/pdf
> ContentLength - 1000
> Content-Disposition - attachment; filename=My.pdf
>
> With above settings IE8 doesn't show open/save dialog for my PDF. Above 
> code works fine with IE6, IE7 and Firefox. If I change "attachment" to 
> "inline", then IE8 shows PDF in the popup window, but this is not what I 
> want. Tested on two PCs and with Acrobat Reader and Foxit PDF clients.

I tested this on IE8 and it works fine.
(without the fake contentLength)

So it probably is some setting that you changed.

Rob, very kind from you but...

>
> I tested this on IE8 and it works fine.
> (without the fake contentLength)

it doesn't work... I'll try to attach here sample tomcat/java project in 
my next post.

Milan <user@exampl.net> wrote:
>
> Rob, very kind from you but...
>
>>
>> I tested this on IE8 and it works fine.
>> (without the fake contentLength)
>
> it doesn't work... I'll try to attach here sample tomcat/java project in 
> my next post.

I have a php script on my website that, for each .pdf file, allows the user
the choice to just open it or to offer it for download.  In that case
these headers are added:

    header('Content-Type: application/pdf');
    header('Content-disposition: attachment; filename="'.$file.'"');
    header('Last-Modified: '.gmdate('D, d M Y H:i:s',filemtime($file)).' GMT');

It works fine.  Also with IE8.  I get a popup that allows me to open,
save, or cancel.
When using the other option, I omit the Content-disposition header and 
it opens in the Adobe Reader plugin without asking questions.

No problem in IE8 apparently.  Maybe a problem in your site or in your
settings of IE8.

See replies to your identical post in IE forum.
http://social.answers.microsoft.com/Forums/en-US/InternetExplorer/threads 

Milan wrote:
> I have written Java application that, when user click on the button, it
> opens new location in the same window in which it shows new HTML page
> and opens new popup window using window.open() JavaScript code. In the
> popup window Java outputs PDF using following headers:
> 
> ContentType - application/pdf
> ContentLength - 1000
> Content-Disposition - attachment; filename=My.pdf
> 
> With above settings IE8 doesn't show open/save dialog for my PDF. Above
> code works fine with IE6, IE7 and Firefox. If I change "attachment" to
> "inline", then IE8 shows PDF in the popup window, but this is not what I
> want. Tested on two PCs and with Acrobat Reader and Foxit PDF clients.

On 23.3.2010 23:32, PA Bear [MS MVP] wrote:
> See replies to your identical post in IE forum.
> http://social.answers.microsoft.com/Forums/en-US/InternetExplorer/threads

I can't find any replies there. I have posted this on Microsoft Connect 
with 0 comments, 0 workarounds and 0 replies, so far. Can you please 
give me a link to those replies? I can't find them.

On 23.3.2010 23:32, PA Bear [MS MVP] wrote:
> See replies to your identical post in IE forum.
> http://social.answers.microsoft.com/Forums/en-US/InternetExplorer/threads

This is my MS Connect link:

https://connect.microsoft.com/IE/feedback/details/543929/ie8-doesnt-show-pdf

Developer-specific resources include:

MSDN IE Development Forum (post such questions here instead)
http://social.msdn.microsoft.com/Forums/en-US/iewebdevelopment/threads

Tip: When posting in Developer forums, always include a link to your web 
site or test pages in your first post.

IE Developer Center
http://msdn.microsoft.com/en-us/ie/default.aspx

Learn IE8
http://msdn.microsoft.com/en-us/ie/aa740473.aspx

HTML and DHTML Overviews and Tutorials
http://msdn.microsoft.com/en-us/library/ms537623.aspx and

Cascading Style Sheets (CSS)
http://msdn2.microsoft.com/en-us/ie/aa740476.aspx

Expression Web SuperPreview for Internet Explorer (free, stand-alone visual 
debugging tool for IE6, IE7, and IE8)
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=8e6ac106-525d-45d0-84db-dccff3fae677

Expression Web SuperPreview Release Notes
http://www.microsoft.com/expression/products/Web_SuperPreviewReleaseNotes.aspx

Validators:
http://validator.w3.org/
http://jigsaw.w3.org/css-validator/


Milan wrote:
> On 23.3.2010 23:32, PA Bear [MS MVP] wrote:
>> See replies to your identical post in IE forum.
>> http://social.answers.microsoft.com/Forums/en-US/InternetExplorer/threads
>
> This is my MS Connect link:
>
> https://connect.microsoft.com/IE/feedback/details/543929/ie8-doesnt-show-pdf