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I receive this error: Extension download error The CiviCRM public extensions directory at https://civicrm.org/extdir/ver=4.7.9|cms=Drupal could not be contacted - please check your webserver can make external HTTP requests or contact CiviCRM team on CiviCRM forum. However, from the browser I can go to that page and see a listing of extension.xml files. I'm trying to get the twilio sms extension installed. Drupal 7.5 CiviCRM 4.7.9

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In this situation, some possibilities to evaluate:

  • There is a problem on civicrm.org, but it only occurs on a subpage. For example, in v4.7.x (and maybe 4.6.x), it fetches the subpage /single (e.g. https://civicrm.org/extdir/ver=4.7.9|cms=Drupal/single).
  • There was a problem on civicrm.org and the failure got somehow cached. You could wait a while and try again -- or clear the caches. (Maybe use the "Support => Developer => API Explorer" to run Extension.refresh or System.flush.)
  • Something in the web server environment is preventing it from making the request, e.g.
    • A security system (such as a firewall, suhosin, or php ini setting) interferes with outgoing requests.
    • The curl/http layer has a broken HTTP/SSL configuration.

In this particular case, I believe there was a change on civicrm.org which prevented it from correctly reading several of the XML files needed for /single, but that issue is now resolved.

(See also: https://issues.civicrm.org/jira/browse/CRM-19090 )

  • Confirming that the issue has indeed been resolved. – KarinG - Semper IT Jul 15 '16 at 1:56
  • I have used it and it works well for me. Do we know why this would happen about once a week? – Josh May 10 '17 at 22:58
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There have been intermittent connectivity issues with our civicrm.org server this week. We've observed this ourselves as well for a number of our projects.

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It is working fine today. Must have been a temporary access issue.

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