Can't edit default.py after upgrade to 2.8.2

[Richard Brown]

I am running Web2py on a Raspberry Pi and accessing the Admin Interface via a browser on a Windows 8.1 PC. Since upgrading to the latest version I can no longer edit default.py. When I try I get a 'blank' edit screen with the 'Files Toggle', + A -' etc buttons at the top and the 'Powered by Web2py' footer - but nothing in between. I can edit my Views, db files and Modules, and I can peek default.py but always this blank screen whenever I try to edit it. It is my longest file at just over 800 lines, but it worked fine before I upgraded.

I have tried both IE and Chrome with the same results. Any ideas?

Richard

[Massimo Di Pierro]

In Chrome, can you check the JavaScript Console? Does it show any error?

[Richard Brown]

Thanks for the reply - there are no errors in the Console tab, just a warning:

event.returnValue is deprecated. Please use the standard event.preventDefault() instead.     jquery.js:4

...but this appears for any page within the Administrative Interface. However, if I click the Network tab there is this message:

My default.py is 822 lines long - I don't know if that is a contributing factor?

Richard

[Richard Brown]

Sorry, the message image did not display in my last post, I've attached it as a file.

[Richard Brown]

A quick update - I tried creating a new file under controllers and that can't be opened for editing either so it has got nothing to do with file size or content, just any file in the controllers folder.

Any additional help or workaround for this would be much appreciated. I have been working on this project in my spare time for almost a year now and am close to completion so it is pretty frustrating not to able to continue!

Thanks, Richard 

[Niphlod]

silly question: have you checked that the file indeed exists and is readable on the raspberry ? (i.e. file permissions are ok)

[Richard Brown]

Yes, it was working fine until I upgraded Web2py. I can open it to view (peek) and it's all there OK, but if I try to edit I get a blank page. If I create a new file from the Admin Interface in the 'controllers' group it behaves in exactly the same way - and this is created by Web2py. I can also see the files and their privileges via WinSCP.

I can edit any other file in my design (views, modules, databases, database admin etc) just not anything in controllers.

The 'Network' tab in Chrome's JavaScript console (see earlier post) shows the file in red and the Status as 'cancelled'.

[Leonel Câmara]

What happens if you do an "inspect element" on the blank part of the screen?

[Larry Weinberg]

This is happening periodically for me for the last several releases of web2py.  Using apache on centos.  

Sometimes I reload the editing page and it works.  Often the tab for the file will show up with no contents.  If I click on the tab, the contents sometimes show up.

Seems like some ajax calls may be crossing paths or something because it's not consistent.

[Richard Brown]

Another update... today I cannot open any files for Editing- including views - in either Chrome, IE or Torch. And on another PC.

All files can be opened for viewing.

I have attached the output from Inspect Element and the Debugger as I load the page.

Help!

[Paolo Valleri]

Please, let us know what you have changed in the last days, if today nothing work and in the early days only default.py.

@devs we should try to update response.static_version for each new major release at least.

Paolo

[jc]

Same problem for me using Chrome and Midori on Linux after upgrading to 2.8.2 However I try to launch the editor I get a blank screen. In the java console I get a load of this type of error:

GET http://127.0.0.1:8000/admin/static/-2.7.3/codemirror/lib/codemirror.css 404 (NOT FOUND)

So although I am on 2.8.2 the system is looking for files in 2.7.3.

I have deleted browser cache (and tried a different browser), deleted sessions in admin. I'm sure there's a simple fix. Anybody know what it is?

Thanks.

P.S. Update: I have just created a new repository by hg cloning web2py, making sure I am running version 2.8.2 (by checking the VERSION file), creating a new test app, editing the existing menu.py and it all works, BUT the static file url's are all of the form /admin/static/_2.7.3/js...

Something to do with using hg to clone web2py?

[LightDot]

Hm. It should be looking for "/admin/static/_2.7.3/codemirror/lib/codemirror.css", so _2.7.3 and not -2.7.3.

I don't think this dash is a direct typo in the web2py code. A rewrite rule somewhere, regex gone wrong?

BTW, the number there is only indirectly related to the web2py version, it isn't the problem in itself. It's this feature in effect:
http://web2py.com/books/default/chapter/29/04/the-core#Static-asset-management
 
Regards

On Monday, December 16, 2013 5:31:49 PM UTC+1, jc wrote:

Same problem for me using Chrome and Midori on Linux after upgrading to 2.8.2 However I try to launch the editor I get a blank screen. In the java console I get a load of this type of error:

GET http://127.0.0.1:8000/admin/static/-2.7.3/codemirror/lib/codemirror.css 404 (NOT FOUND)

So although I am on 2.8.2 the system is looking for files in 2.7.3.

I have deleted browser cache (and tried a different browser), deleted sessions in admin. I'm sure there's a simple fix. Anybody know what it is?

Thanks.

On Friday, 13 December 2013 09:27:04 UTC, Richard Brown wrote:

[jc]

On Monday, 16 December 2013 17:06:28 UTC, LightDot wrote:

Hm. It should be looking for "/admin/static/_2.7.3/codemirror/lib/codemirror.css", so _2.7.3 and not -2.7.3.

I don't think this dash is a direct typo in the web2py code. A rewrite rule somewhere, regex gone wrong?

I have map_hyphen = 'True' in routes.py to allow url's with hyphens. Maybe related to that, though it seems odd.

 

BTW, the number there is only indirectly related to the web2py version, it isn't the problem in itself. It's this feature in effect:
http://web2py.com/books/default/chapter/29/04/the-core#Static-asset-management
 

Thank you I was trying to find that in the book. 

I have now set the version explicitly (response.static_version = '2.8.2') in applications/admin/0.py (it was set to 2.7.3) and I have commented out the map_hyphen = 'True' in my routes.py and I can edit files again.

 

Regards

[Richard Brown]

OK, to answer Paolo's question on Friday as to what had changed to make it not work at all - nothing, only the passage of time. So as an experiment I rebooted my RPi once again and behold it all sprang into life. I have rebooted several times since the Web2py upgrade and each time it works to some extent for a while, and then stops. I was then away until Sunday evening but it was still working when I tried it then, and so I was actually able to do some development work. However tonight when I logged in - nothing again. Not a single file at all will open for editing.

Could this be some sort of timing (or timeout) problem rather than a hard 'bug'? File loading, when it does work, seems much slower than with the previous version. I've supplied some debug info in previous posts, but if there is anything else I can look at then please let me know.

[paolo....@gmail.com]

Hi Richard, 

which webserver are you using? Let us know more info about the infrastructure you have build on the rpi

 Paolo

2013/12/16 Richard Brown <rab...@gmail.com>

OK, to answer Paolo's question on Friday as to what had changed to make it not work at all - nothing, only the passage of time. So as an experiment I rebooted my RPi once again and behold it all sprang into life. I have rebooted several times since the Web2py upgrade and each time it works to some extent for a while, and then stops. I was then away until Sunday evening but it was still working when I tried it then, and so I was actually able to do some development work. However tonight when I logged in - nothing again. Not a single file at all will open for editing.

Could this be some sort of timing (or timeout) problem rather than a hard 'bug'? File loading, when it does work, seems much slower than with the previous version. I've supplied some debug info in previous posts, but if there is anything else I can look at then please let me know.

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[Richard Brown]

Hi Paolo, as a C programming, PC-using hardware engineer bumbling around in Linux-land I came across this sequence of commands:

wget http://web2py.googlecode.com/hg/scripts/setup-web2py-ubuntu.sh
chmod +x setup-web2py-ubuntu.sh
sudo ./setup-web2py-ubuntu.sh

So whatever it does that is what I have installed. The webserver is Apache. I first ran this install a year or so ago and it was all working fine until I had some database locking problems when using the Scheduler so I tried to upgrade Web2py to see if it fixed it. However I kept getting tickets and couldn't work out what was wrong, so I reran the above commands, which presumably re-installed everything, and it all sprang into life - but with the file editing problem currently under discussion.

The RPi is running Debian, but not the latest version as I didn't want to change anything that was working at the time. Maybe I should update now.

Hope this helps, Richard.

[paolo....@gmail.com]

the editor requires several files, I'm just wondering if you get all of them, can you check if there are error in Chrome console?

Moreover, please check apache logs, if something is not working there. 

have you enabled map_hyphen ?

 Paolo

2013/12/17 Richard Brown <rab...@gmail.com>

--

[Leonel Câmara]

BTW Richard, the scheduler db locking problems are to be expected if you're using sqlite, what you should do is to use one sqlite database for the scheduler and another for the rest of your app. 

[Richard Brown]

Hi Paolo, there are no error messages in the Chrome Console, just a 'cancelled' status against the file to be edited under the Network tab. The details are in my posts  on Dec 10 in response to Massimo's question.

I will try map_hyphen this evening - is this to be added to 'routes.py' as described in one of jc's posts? If this was the problem wouldn't it either work or not work consistently?

Could you please explain where to find/how to view the Apache logs.

Thanks, Richard

[Paolo Valleri]

logs should be placed in /var/log/apache2/ and /var/log/wsgi

can you also check if the string after alias_match in /etc/apache2/sites-available/default matches the one mentioned here: https://github.com/web2py/web2py/blob/master/scripts/setup-web2py-ubuntu.sh#L148

Paolo

[Richard Brown]

Hi Paolo, I've attached the error.log and access.log files from /var/log/apache2 as requested. The logs were capture after a couple of failed attempts to edit files at about 20:18.The entries at around 19:30 were to the target site via my smartphone.

The folder /var/log/wsgi does not exist.

The AliasMatch parameter is exactly as per the script in the link.

I am about to reboot the RPi again to see if I can do some actual development.

********************

Leonel - I am aware of the concerns regarding db access from multiple threads, but my project (Heating Controller) specifically creates and modifies events which the Scheduler scans and acts upon so I'm not sure how separate databases would work. To avoid blurring the lines I was going to start a separate post on this topic once I am able to edit files... However, is there a high-level idiot's guide/explanation/diagram anywhere for novices like me as to how databases are stored and accessed?

Richard 

[paolo....@gmail.com]

You should locate the log of mod_wsgi, please post those as soon you find them, from the apache log everything seems to work well (I see 304 for cached stuff and 200 when you edit file), for example line 720-725.

Be aware that, you got a lot of requests from external ip which are sending against your apache fake/malformed messages, see lines 497, 498, 516 and so on

 Paolo

2013/12/17 Richard Brown <rab...@gmail.com>

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[Richard Brown]

Hi Paolo, I think I'm getting a bit out of my depth here... I can't specifically find any wsgi log files, I did a  'find'for filenames containing 'wsgi' and the results are attached, with the command I used for the search at the top of the file. Please tell me what I need to send.

Last night I rebooted my RPi and was able to work for a couple of hours before I got a 'Communication Error' when trying to revert a file and that was it - no more editing.

Could you recommend any useful tips/links regarding internet security please?

Thanks again,  Richard

[paolo....@gmail.com]

there are plenty how-to for improving the security of your network/rpi. I don't know your network configuration, given that I can't tell you what to do. 

Surely you have apache accessible from 'outside' if this is not intentional I would fix it as the first thing to do.

Moreover, I found this, maybe it could help http://two-bulls.com/2011/02/to-solve-invalid-method-request-x16x03x01/

Finally, in your error.log line 6-34 there are several sudo messages, check on google if you can find out more related to the rpi.

 Paolo

2013/12/18 Richard Brown <rab...@gmail.com>

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[Richard Brown]

Hi Paolo, this is a web site so presumably has to accessible from the outside?

We should probably keep this discussion separate and concentrate on the main issue - is there anything from my list of files with wsgi references which you need to see the errors?

[paolo....@gmail.com]

No but I am not a master of mod_wsgi.

everything works but the editor, right?

 Paolo

2013/12/19 Richard Brown <rab...@gmail.com>

Hi Paolo, this is a web site so presumably has to accessible from the outside?

We should probably keep this discussion separate and concentrate on the main issue - is there anything from my list of files with wsgi references which you need to see the errors?

--

[Richard Brown]

Yes, everything but editing. If I reboot the RPi it works for a while, then stops. It seems to me like it is a timing or timeout problem. Everything takes noticeably longer since the upgrade, including my application site which takes >15 seconds  to load even over my local network. perhaps that is why it has a 'Cancelled' message in the Java console's Network tab; because it timed out?

[Michael Sounhein]

Apparently there was a fix discovered here.

https://www.mail-archive.com/web...@googlegroups.com/msg129910.html

append the following line to /etc/apache2/apache2.conf

Header always append X-Frame-Options SAMEORIGIN

[Massimo Di Pierro]

Can you submit a patch to the scripts/setup-web2py-* scripts?

[Trevor Strauss]

I'm having this same problem since upgrading from 2.8.2 to 2.9.9  Error in console when loading a newly created file is...

Uncaught TypeError: Cannot read property 'length' of undefined comment-fold.js:24(anonymous function) comment-fold.js:24(anonymous function) foldcode.js:113getRange foldcode.js:18doFold foldcode.js:31(anonymous function) foldcode.js:69(anonymous function) VM977:23(anonymous function) jquery.js:2m.extend.globalEval jquery.js:2m.fn.extend.domManip jquery.js:3m.fn.extend.append jquery.js:3(anonymous function) ajax_editor.js:259j jquery.js:2k.fireWith jquery.js:2x jquery.js:4b

nginx webserver