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* Calendar/CalDAV: store huge iCal attributes compressed to fix stalled sync of Outlook/Exchange events

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X-ALT-DESC from Outlook/Exchange gets easy over 16k of our table, but it's nicely compressable ;)
This commit is contained in:
Ralf Becker 2018-12-09 13:48:35 +01:00
parent 8a0ae8f01d
commit d65194fce3
1 changed files with 27 additions and 1 deletions
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28
calendar/inc/class.calendar_ical.inc.php
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@ -848,8 +848,14 @@ class calendar_ical extends calendar_boupdate
{
if (substr($name, 0, 2) == '##')
{
if (($attr = json_decode($value, true)) && is_array($attr))
if ($value[0] === '{' && ($attr = json_decode($value, true)) && is_array($attr))
{
// check if attribute was stored compressed --> uncompress it
if (count($attr) === 1 && !empty($attr['gzcompress']))
{
$attr = json_decode(gzuncompress(base64_decode($attr['gzcompress'])), true);
if (!is_array($attr)) continue;
}
$vevent->setAttribute(substr($name, 2), $attr['value'], $attr['params'], true, $attr['values']);
}
else
@ -2980,6 +2986,26 @@ class calendar_ical extends calendar_boupdate
}
$event['##'.$attributes['name']] = $attributes['params'] || count($attributes['values']) > 1 ?
json_encode($attributes) : $attributes['value'];
// check if json_encoded attribute is to big for our table
if (($attributes['params'] || count($attributes['values']) > 1) &&
strlen($event['##'.$attributes['name']]) >
Api\Db::get_column_attribute('cal_extra_value', 'egw_cal_extra', 'calendar', 'precision'))
{
// store content compressed (Outlook/Exchange HTML garbadge is very good compressable)
if (function_exist('gzcompress'))
{
$event['##'.$attributes['name']] = json_encode(array(
'gzcompress' => base64_encode(gzcompress($event['##'.$attributes['name']]))
));
}
// if that's not enough --> unset it, as truncating the json gives nothing
if (strlen($event['##'.$attributes['name']]) >
Api\Db::get_column_attribute('cal_extra_value', 'egw_cal_extra', 'calendar', 'precision'))
{
unset($event['##'.$attributes['name']]);
}
}
break;
}
}