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 auth/saml still uses memcache extension which is obsolete.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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