How can I specify a file name for a Visualforce generated PDF

What can I do on a Visualforce page that is a renderAs="pdf" that will result in the name of the file that shows up when the user clicks Save As... to not be the name of the Visualforce page.

The page is generated via a GET request coming from clicking a custom button.

Below is some code that is representative of the PDF.

 <apex:page standardController="Account" extensions="AccountPdf" 
         showHeader="false" 
         sidebar="false" 
         renderAs="PDF"
         title="AccountReport.pdf"
         contentType="application/pdf#AccountReport.pdf"
         <head>
             <title>AccountReport.pdf</title>
         </head>
         <apex:outputText value="Hello World"/>
 </apex:page>

The browser bar does not have the title value in it and when the user clicks Save As... the name of the file is the name of the Visualforce page (e.g., myPageName). If I remove the renderAs="pdf" the file downloads automatically with the correct file name due to the contentType, but the actual content type doesn’t appear to be a PDF.

Answer

You would need to set the Content-Disposition header.

In constructor of the Visualforce controller:

Apexpages.currentPage().getHeaders().put('content-disposition', 'attachment; filename=AccountReport.pdf');

If you want to make the file name dynamic you will need to refer to several RFCs on how to correctly encode the filename. E.g. if it contains spaces it will need to be quoted. If there are non-ASCII characters or it is longer than 78 characters it needs to be Hex encoded (RFC 2184).

Attribution
Source : Link , Question Author : Peter Knolle , Answer Author : Daniel Ballinger

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