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I am using the wp-polls plugin on my website. This plugin relies on using AJAX requests of the form http://www.myfakewebsiteurl.com/wp-admin/admin-ajax.php?action=polls&view=process&poll_id=2&poll_2=8&poll_2_nonce=420d75e659

When I log in, this request works fine: it pulls the poll results from the server, and then displays them on the desired web page.

However, when I log out, this request redirects me to the home page. Thus, instead of the poll results appearing, I get the home page loaded where the poll results are supposed to be.

Why would admin-ajax.php redirect visitors to my Wordpress-powered site who are not logged in to the home page of my website?

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up vote 3 down vote accepted

It only redirects when accessed directly, as do all files located in wp-admin/. AJAX requests should work fine regardless of authentication status.

Edit: wp-admin/admin-ajax.php should not redirect in any situation. Perhaps a plugin is redirecting all unauthenticated users to the homepage? By default, accessing files inside wp-admin/ when not logged in should redirect to the login page.

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Thank you, but I'm not visiting the URL directly in my browser address bar. I'm retrieving the URL via AJAX in jQuery code. That should work, right? –  David Faux Dec 8 '12 at 3:36
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Yes, it should. Perhaps a plugin is redirecting unauthenticated users to the homepage? By default, accessing files inside wp-admin/ when not logged in should redirect to the login page. –  bungeshea Dec 8 '12 at 3:38
    
OMG! You're right! I've been debugging this for 5 days, and I never suspected that! Apparently, one of my plugins was redirecting visitors if they were not logged in to the home page. I found this out by performing grep -R 'redirect' . in my plugins folder. I am still confused though. Why would code in another plugin be called? The AJAX request wasn't even relevant to this plugin ... –  David Faux Dec 8 '12 at 3:59
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It depends on how the redirect is handled - if they check for the WP_ADMIN constant or use the is_admin() function, then it will trigger on any AJAX request or any wp-admin page –  bungeshea Dec 8 '12 at 4:27
    
Thank you! That makes sense. admin-ajax.php is an admin file. –  David Faux Dec 8 '12 at 4:53
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