Wednesday, July 27, 2011

Blank page when accessing streamed pdf file over https

If you receive a blank page on your Internet Explorer when you try to open streamed pdf document, and you have tried almost anything including resetting the browser, re-installing Adobe Reader (pre-registering active-x plug-in), installing the latest version of Adobe Reader ...and still you're receiving white blank page, try opening the same streamed pdf document via http (if you're hosting the web server, or someone can provide that for you). In my case I could successfully open streamed pdf document when the document was provided via http. So, I started digging deeper and bumped on the following article http://support.microsoft.com/kb/323308 "Internet Explorer file downloads over SSL do not work with the cache control headers". In my scenario the client is running on XP with IE 8 and Adobe reader 8, and the web server IIS 7.5. In Microsoft's KB there is a solution for IE 8, where I have added the following key "BypassSSLNoCacheCheck"=Dword:00000001 and the IE has finally showed the streamed pdf file ! But you must be aware that the server is using "cache-control:no-store", check with your developers !
In order not to change (add registry settings) on all workstations, I have pushed developers to change their code to response.setHeader("Cache-Control","private") , and the case was successfully closed.

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