mahara-contributors team mailing list archive

[Yaju Mahida <1792272@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

We believe that following enhancements and fixing identified issues will
make session handling more robust. We have already implemented some of
these enhancements and most probably next month will be sending over
patches once we complete all these suggested enhancements.

1.      Duplication with slight differences

-       The Memcached and Redis session storage functionality is
duplicated with slight differences in auth/session.php and
auth/saml/lib.php which can be combined into session.php and can be
called from there. For server configs, it relies on the main config.php.

2.      Memcached server connectivity test is broken on RHEL 7 or newer
systems

-       session.php uses nc utility with option –z (link to Linux ncat
utility) to check server connectivity which should be avoided and it is
already broken on RedHat 7.x or higher system where –Z option is no
longer available and it fails yet allowed to go past this point without
any error message

-       This can be avoided using fsockopen which we have already
implemented as a separate function in web.php which can be used for this
sort of purposes.

+
+/**
+ * Is the host reachable on specified port
+ *
+ * @param string    $host    The host to check
+ * @param string    $port    The port to check
+ *
+ * @return bool
+ */
+function host_reachable($host, $port) {
+   $fp = fsockopen($host, $port);
+
+   if($fp) {
+       fclose ($fp);
+       return true;
+    } else {
+       return false;
+    }
+}

-       Implement Memcached connection check function in session.php as
part of is_memcache_configured


3.	auth/saml still uses memcache extension which is obsolete. We have fixed this issue for our implementation and it is now using memcached extension

** Affects: mahara
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1792272

Title:
  Enhance Memcached & Redis session storage functionality for both
  Mahara & SAML authentication

Status in Mahara:
  New

Bug description:
  We believe that following enhancements and fixing identified issues
  will make session handling more robust. We have already implemented
  some of these enhancements and most probably next month will be
  sending over patches once we complete all these suggested
  enhancements.

  1.      Duplication with slight differences

  -       The Memcached and Redis session storage functionality is
  duplicated with slight differences in auth/session.php and
  auth/saml/lib.php which can be combined into session.php and can be
  called from there. For server configs, it relies on the main
  config.php.

  2.      Memcached server connectivity test is broken on RHEL 7 or
  newer systems

  -       session.php uses nc utility with option –z (link to Linux ncat
  utility) to check server connectivity which should be avoided and it
  is already broken on RedHat 7.x or higher system where –Z option is no
  longer available and it fails yet allowed to go past this point
  without any error message

  -       This can be avoided using fsockopen which we have already
  implemented as a separate function in web.php which can be used for
  this sort of purposes.

  +
  +/**
  + * Is the host reachable on specified port
  + *
  + * @param string    $host    The host to check
  + * @param string    $port    The port to check
  + *
  + * @return bool
  + */
  +function host_reachable($host, $port) {
  +   $fp = fsockopen($host, $port);
  +
  +   if($fp) {
  +       fclose ($fp);
  +       return true;
  +    } else {
  +       return false;
  +    }
  +}

  -       Implement Memcached connection check function in session.php
  as part of is_memcache_configured

  
  3.	auth/saml still uses memcache extension which is obsolete. We have fixed this issue for our implementation and it is now using memcached extension

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