[pmwiki-users] Cookbook Recipe Attachtable problem

Thu Jul 6 15:21:23 CDT 2017

There is an infinite loop somewhere when a markup directive called by 
MarkupToHTML calls MarkupToHTML itself (attachtable.php line 169). To 
the server quickly runs out of memory with a fatal PHP error or a 500 
Internal Server Error, or with 503 Service Unavailable. On production 
servers you may not see the error message but a blank page.

This fixes it, in config.php, before the "switch" line:

   $AttachtableProperReferenceLookupMaxPages = 0;

This way Attachtable will use its own function to search for file links, 
instead of calling MarkupToHTML. This is the default setting if there 
are more than 8 pages in your group. I assume most people have more 
pages and have not noticed the bug.

Petko

---
Change log     :  http://www.pmwiki.org/wiki/PmWiki/ChangeLog
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If you upgrade :  http://www.pmwiki.org/wiki/PmWiki/Upgrades

On 2017-07-06 21:15, Monte Padget wrote:
> The following is the information from test site.
> 
> 
> Server: 000webhost
> 
> PmWiki: pmwiki-2.2.99
> 
> PHP: 7.1.6
> 
> Attachtable: attachtable-php55.zip with attachtable-getid3-more.tar.gz
> 
> Added to config.php (sample-config.php copied to local and renamed):
> 
> $WikiTitle = 'TestWiki';
> 
> $UploadPrefixFmt = '/$Group/$Name';
> $UploadMaxSize = 5000000;
> 
> $EnablePathInfo = 1;
> 
> $DefaultPasswords['admin'] = pmcrypt('secret');
> 
> $EnableGUIButtons = 1;
> 
> 
> $WikiTitle = 'TestWiki';
> 
> $EnableUpload = 1;
> $UploadPermAdd = 0;
> $DefaultPasswords['upload'] = pmcrypt('secret');
> 
> switch($action) {
>   case 'delattach':
>   case 'renameattach':
>   case 'downloaddeleted':
>     
> include_once("$FarmD/cookbook/attachtable/attachtable-actions.php");
>     break;
>   case 'fileinfo':
>   case 'thumbnail':
>     include_once("$FarmD/cookbook/attachtable/fileinfo.php");
>     break;
>   case 'upload':
>   default:
>     include_once("$FarmD/cookbook/attachtable/attachtable.php");
>     break;
> }
> 
> 
> WikiSandbox (-> Works verified files in the uploads/Main/WikiSandbox 
> directory):
> 
> Attach:bd1b2eaac1ee68222e2c74b693aec3b1.jpg\\
> 
> Attach:landing_bg.jpg\\
> 
> Attach:bg_newsletter_1483052655.jpg\\
> 
> 
> Addition of following to WikiSandbox (-> Save gives blank screen,
> preview shows correctly);
> 
> (:attachtable:)
> 
> 
> Source Images:
> 
> 
> https://s-media-cache-ak0.pinimg.com/736x/bd/1b/2e/bd1b2eaac1ee68222e2c74b693aec3b1.jpg
> https://bubbleup.vo.llnwd.net/o2/margaritaville/margaritaville2014/landing_bg.jpg
> https://s3.amazonaws.com/busites_www/mville2017/user_data/5/uploads/bg_newsletter_1483052655.jpg
> 
> 
> 
> ________________________________
> From: pmwiki-users <pmwiki-users-bounces at pmichaud.com> on behalf of
> Monte Padget <m_padget at hotmail.com>
> Sent: Thursday, July 6, 2017 2:20 PM
> To: pmwiki-users at pmichaud.com
> Subject: Re: [pmwiki-users] Cookbook Recipe Attachtable problem
> 
> 
> I have started a fresh install on 000webhost with pmwiki-2.2.99.
> 
> 
> I'll start setting up a new one from scratch to see what I can find.
> I'll post what I find.
> 
> 
> I wasn't listing any audio files, the only ones I had so far where a
> couple of image files.
> 
> 
> Thanks,
> 
> Monte
> 
> 
> ________________________________
> From: pmwiki-users <pmwiki-users-bounces at pmichaud.com> on behalf of
> Petko Yotov <5ko at 5ko.fr>
> Sent: Thursday, July 6, 2017 12:57 PM
> To: pmwiki-users at pmichaud.com
> Subject: Re: [pmwiki-users] Cookbook Recipe Attachtable problem
> 
> You don't mention your PmWiki version and your PHP version. I assume 
> you
> installed the latest PmWiki version.
> 
> These symptoms suggest an older PmWiki installation, and/or an older
> recipe that calls the function "htmlspecialchars" directly, while the
> text contains what PHP considers invalid bytes. See:
> 
>    http://www.pmwiki.org/wiki/PmWiki/Troubleshooting#blank_sections
> 
> PmWiki | PmWiki /
> Troubleshooting<http://www.pmwiki.org/wiki/PmWiki/Troubleshooting#blank_sections>
> www.pmwiki.org
> PmWiki is pretty robust and can automatically adapt to a very wide
> variety of environments. However, sometimes things don't go as we
> expect, so we're cataloging ...
> 
> 
> 
> 
> Attachtable doesn't appear to call this function but the file
> getid3.lib.php calls "htmlentities" 3 times and it may also suffer from
> the bug - I suspect it may happen if you list audio/video files whose
> metadata has a different charset than the wiki.
> 
> It could be another recipe or a skin. To check it, disable all recipes
> then test the wiki: if the bug persists, it could be a PmWiki bug and
> I'd be very interested to test and review that installation and fix the
> bug. Re-enable one recipe at a time and check the wiki for the bug: at
> some point it will re-appear and you'll know the recipe you just 
> enabled
> is the culprit. There may be more than one -- we can fix them all.
> 
> Petko
> 
> On 2017-07-06 17:38, Monte Padget wrote:
>> I am able to preview the (:attachtable:) and it shows correctly, but
>> if I try to save, the page is blank. Not sure what I'm missing at this
>> point. I'll post more when I can find something.
>> 
>> 
>> Been reading through the Talk page, but unable to find what I need.
>> 
>> 
>> Are there any nuggets of wisdom that I might be missing?
>> 
>> 
>> -Monte
>> 
>> 
>> ________________________________
>> From: pmwiki-users <pmwiki-users-bounces at pmichaud.com> on behalf of
>> Monte Padget <m_padget at hotmail.com>
>> Sent: Thursday, July 6, 2017 10:48 AM
>> To: Pmwiki-users at pmichaud.com
>> Subject: Re: [pmwiki-users] Cookbook Recipe Attachtable problem
>> 
>> 
>> I think I found a problem. With all the checking I was doing, I had
>> commented out the password at some point and forgot to un-comment. I'm
>> not sure if it is completely working yet, but it is progressing again.
>> 
>> 
>> Thanks,
>> 
>> Monte
>> 
>> 
>> ________________________________
>> From: pmwiki-users <pmwiki-users-bounces at pmichaud.com> on behalf of
>> Monte Padget <m_padget at hotmail.com>
>> Sent: Thursday, July 6, 2017 9:48 AM
>> To: Pmwiki-users at pmichaud.com
>> Subject: [pmwiki-users] Cookbook Recipe Attachtable problem
>> 
>> 
>> I'm in the process of setting up a site on 000webhost and am having
>> problems getting the Cookbook Recipe Attachtable to work.
>> 
>> 
>> This recipe I have used in the past and want to use it still, but the
>> wiki won't load.
>> 
>> 
>> Following the steps, when I get to the step to edit the
>> Site.UploadQuickReference, I am not able to edit. I am prompted for
>> the password, but it won't go beyond that screen. I have verified my
>> password several times, I have verified the permissions of the wiki.d
>> directory. I do have uploads allowed. Could that be the problem? Not
>> being allowed to edit this Site?
>> 
>> 
>> -Monte
> 
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