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FIX: Mixed security warning message appears when the POST method is used to stream a PDF file over HTTPS

View products that this article applies to.


When you use a POST method over HTTPS to access a server script that streams back a Portable Document Format (PDF) file, you may receive the following warning message:
This page contains both secure and non-secure items. Do you want to display the non-secure items?

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To resolve this problem, obtain the latest service pack for Microsoft Internet Explorer 6.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
328548 How to obtain the latest service pack for Internet Explorer 6
After you apply the fix, you must make sure that the Web server that you download the PDF file from sends "Accept-Ranges: bytes" in the HTTP Response Header. However, this problem still occurs when the header is sent if the PDF file is less than 8 KB.

To work around the problem in this case and send the header, pad the PDF file so that its size is greater than or equal to 8 KB.

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.

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Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.

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Keywords: KB321532, kbie600sp1fix, kbbug, kbfix

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Article Info
Article ID : 321532
Revision : 8
Created on : 4/4/2005
Published on : 4/4/2005
Exists online : False
Views : 306