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copied!<p>I don't see any reference to .NET in your question, but I'm going to provide a related solution. Hopefully you can take from it what you need, and developers assuming your question pertains to .NET might find value in it, too.</p> <p>Here's a method I've used before to render in-browser PDFs, via HTTPS, without** caching.</p> <pre><code> private void RenderPdfToResponse(byte[] documentBytes) { Response.BufferOutput = true; Response.ClearContent(); Response.ClearHeaders(); Response.AddHeader("Cache-control", "no-store"); Response.ContentType = "application/pdf"; Response.AddHeader("Content-Length", documentBytes.Length.ToString()); Response.BinaryWrite(documentBytes); Response.Flush(); HttpContext.Current.ApplicationInstance.CompleteRequest(); } </code></pre> <p>** There is a <em>pseudo-cache</em> that occurs, just long enough for Adobe Reader to load the PDF file. I looked for a reference describing what I'm talking about, and a <a href="http://www.anetforums.com/posts.aspx?ThreadIndex=19895" rel="nofollow noreferrer">random forum thread</a> is the best I could do:</p> <blockquote> <p>IE stores the PDF in allocated 'volatile' memory and places a pointer in %system% Temp. This is the only place the file is stored. The pointer is deleted and allocated memory is freed as soon as Adobe Reader is closed.</p> </blockquote> <p>I can't vouch for the technical accuracy of that, but it does reflect what I've observed using the method above. In fact, I think that file disappears the moment it's finished loading in Adobe Reader (in the browser).</p>

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