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When using Joomla through a secure conection (https://example.com/administrator), the Install from Web option in the Extension manager gives an error:

Cannot connect to the Joomla! server. Please try again later.

Google Chrome Developer tools gives the following error:

Mixed Content: The page at 'https://example.com/administrator/index.php?option=com_installer' was loaded over HTTPS, but requested an insecure script 'http://appscdn.joomla.org/webapps/index.php?format=json&option=com_apps&view=My3z&dev_level=Ng==&list=grid&pv=MS3wLjU=&callback=jedapps_jsonpcallback'. This request has been blocked; the content must be served over HTTPS.

The error is also reported several times, e.g. here and here, and even said to be solved, but I just confirmed this behavior on several different Joomla 3.3.6 pages on different servers.

Are there any workarounds? Or any particular reason why this still is an issue?

  • Super solution, I had thad same problem. Take a look ad your site with firefox and the developer menu ( F12 ) There u can find out ( with the network tab ) witch image had mixed content and is not secure.( enough ) Probably it is your seo tool or page cache that holds an old image. Firefox makes a list where you can search te problem. Regards Rob – Rob Knol Feb 9 '16 at 11:46
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I found a (partially) working solution, but it is a core hack, and thus not a good option.

Locate the file plugins/installer/webinstaller/webinstaller.php, on change line 21:

public $appsBaseUrl = 'http://appscdn.joomla.org/webapps/'; // will be https once CDN is setup for SSL

and change it to https://:

public $appsBaseUrl = 'https://appscdn.joomla.org/webapps/';    // will be https once CDN is setup for SSL

The Install from web tab will now work, but images still seems to be loaded through a non-secure connection, giving a Mixed content error for every image:

Mixed Content: The page at 'https://example.com/administrator/index.php?option=com_installer' was loaded over HTTPS, but requested an insecure image 'http://extensionscdn.joomla.org/components/com_example/img/listings/s/40281.png'. This content should also be served over HTTPS.

  • It seem that you should create an issue on issues tracker. – Dmitry Rekun Jan 9 '15 at 15:59

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