misc: make http_request intercept SSL certificate errors (#14527)

wcs/qommon/misc.py

@@ -23,6 +23,7 @@ import time
 import httplib
 import urllib
 import socket
+import ssl
 import base64
 import json
 import subprocess
@@ -287,6 +288,9 @@ def _http_request(url, method='GET', body=None, headers={}, timeout=None):
     except socket.error, err:
         conn.close()
         raise ConnectionError('error while fetching the page : %s' % err)
+    except ssl.CertificateError, err:
+        conn.close()
+        raise ConnectionError('certificate error when connecting (%s)' % err)
     else:
         data = response.read()
         status = response.status