** Changed in: mahara
Milestone: 17.10.0 => 18.04.0
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https://bugs.launchpad.net/bugs/1422837
Title:
XML RPC simpleXML limits payload size
Status in Mahara:
Confirmed
Bug description:
Operating System: Ubuntu 14.04.1 LTS
Mahara version: 1.9.3
Database: mysql
Browser: chrome 40.0.2214.111
------------------------------
Steps to reproduce - you need a system capable of XMLRPC communication
with Mahara (e.g. Moodle)
1) With Moodle - set up mahara networking / portfolios.
2) Open a course with a forum
3) Add 2 entries. One with an attachment under 5 MB. One with an attachment
over 5 MB. On Each click "Export to portfolio" in the bottom. 4) Go through the
screens to start export - ask it to do it now (i.e. not wait for cron).
5) Check the Mahara site to see what made it through successfully.
------------------------------
simpleXML may not be the best parser for XMLRPC payloads
in api/xmlrpc/lib.php
function parse_payload($payload) {
try {
$xml = new SimpleXMLElement($payload);
return $xml;
} catch (Exception $e) {
throw new MaharaException('Encrypted payload is not a valid XML
document', 6002);
}
}
This means if you send a large file (in our tests greater than approx 7mb)
base 64 encoded over XMLRPC it will fail to parse.
It didn't seem to make any difference if we increased the memory limit to
800M in php.ini or even by setting the php memory limit to 800M via PHP ini_set
in function parse_payload - this suggests that there is a limit to what
SimpleXML can handle regardless of the PHP memory limit.
Note - 932 in my source code is the 'throw new exception' following
$xml = new SimpleXMLElement($payload);
called at [/vagrant/www/maharadev/mahara/lib/errors.php:465] #1
exception(MaharaException Object ([] => 1,[] => Encrypted payload is not a
valid XML document,[] => ,[] => 6002,[] =>
/vagrant/www/maharadev/mahara/api/xmlrpc/lib.php,[] => 932,[] => Array ([0] =>
Array ([file] => /vagrant/www/maharadev/mahara/api/xmlrpc/lib.php,[line] =>
921,[function] => parse_payload,[args] => Array ([0] =>ERROR 4:
4: remote server error: code: , message: A nonrecoverable error occurred.
This probably means you have encountered a bug in the system #0
MaharaException->handle_exception() called at
[/vagrant/www/maharadev/mahara/lib/errors.php:465] #1 exception(MaharaException
Object ([] => 1,[] => Encrypted payload is not a valid XML document,[] => ,[]
=> 6002,[] => /vagrant/www/maharadev/mahara/api/xmlrpc/lib.php,[] => 932,[] =>
Array ([0] => Array ([file] =>
/vagrant/www/maharadev/mahara/api/xmlrpc/lib.php,[line] => 921,[function] =>
parse_payload,[args] => Array ([0] =>
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