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From "Andrus" <>
Subject [users@httpd] RE: IE6+Adobe Reader 5 will not open a PDF File
Date Wed, 09 Apr 2003 11:44:37 GMT
As I wrote earlier, I have an application using my custom web server which
does exactly which I want:

display PDF files in IE 6.  It does to use CGI.

My web server does not use Location:, it returns bata directly to the

However, exactly the same PDF file is not displayed from Apache server.

According to a

if I use Content-disposition: Inline, then IE 6 displays PDF INSIDE browser

If PDF file does not start with %PDF-  , Acrobat reader displays error
message about this.
If PDF file is corrupted, Acrobat reader displays error message also.

What sniffer to use in Windows ? or is it possible to log packets from
Apache side ?
Opening the created pdf file from c: dirive displays it in reader without

I think Apache adds some headers which confuses IE or Reader.

Any help ?

>From: Lauralyn Ninow <>

>I don't know what to say, other than I don't think POST/GET matters. As
>as you are writting your headers and data correctly.  Look at the specs for
>HTTP and get a sniffer to see the data (the contents of the PDF file) you
>are sending.  You may be sending wrong data or something.  A PDF file
>start with %PDF-1.4% and end with a %%EOF

>The only way I could write the data is by writing the file out in binary
>chunks to the browser. The speed is what you'd expect for large files, so
>for your CGI program to do this really wouldn't be a big deal.

>What are you trying to accomplish?  are you wanting the person to download
>the PDF file? or do you wnat the PDF file to open in the person's browser?
>You can't really control this unless you pass an uncommon mime-type. Most
>browsers will prompt to download an unknown mime-type. But for PDF files,
>you can bet that people have that configured to open in their browsers.

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