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What is the referer when using Save to PDF link?

brianz wrote on 2011-05-30:
I have a secured site I'd like to allow access to pdfcrowd for the Save to PDF link to bypass the login screen.

I want to use PHP to check the referer and allow the request coming from pdfcrowd to bypass login, what would I put as the referer?

So the code would be:

if ($_SERVER['http_referer'] == 'source of pdfcrowd request goes here') {
//code to bypass login goes here

Question is what is the source of the pdfcrowd request?

support wrote on 2011-05-30:
The referrer is a generic one:
Mozilla/5.0 (X11; U; Linux; en-US) AppleWebKit/531.2 (KHTML, like Gecko) Safari/531.2

So you may want to check the IP as well:
brianz wrote on 2011-06-25:
Wonderful thanks! :)
quotientapp wrote on 2012-03-31:
I'd like to make a request/suggestion, would you be able to add a unique header? Such as:

I know it's not really being used to describe a proxy service as per the spec (see, ) but it could be something test-able that's guaranteed not to change in the future :)

Thanks for the excellent service, keep up the great work!
support wrote on 2012-04-01:
Thanks for the suggestion. We will be considering this for the future.