[ pywikipediabot-Support Requests-3019475 ] No JSON object could be decoded - Pywikipedia-bugs

22 Jun 2010


      Support Requests item #3019475, was opened at 2010-06-22 08:59
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Category: Install Problem
Group: None
Status: Open
Priority: 5
Private: No
Submitted By: https://www.google.com/accounts ()
Assigned to: Nobody/Anonymous (nobody)
Summary: No JSON object could be decoded
Initial Comment:
On Ubuntu 10.04, Karmic LAMP (PHP 5.2) Python 2.6.5, pywikipediabot from 2010-05-29 SVN, using identical server and bot configuration files as on a Mac setup (however, in this case, pywikipediabot reports an IP address, so I didn't need to hack httpd.conf), I get the following:
"Logging into FamilyName:en as UserName via API
Error downloading data: No JSON object could be decoded
Request en:/scriptpath/api.php?
Retrying in x seconds
I changed this to milliseconds to timely see the final error message, which is:
ERROR: ApiGetDataParse cause error No JSON object could be decoded
The program also creates a dump file containing the following:
Error reported: No JSON object could be decoded
127.0.0.1
/scriptpath/api.php?
<feff>{"login":{"result":"NeedToken","token":"[some md5-looking hash]"}}
Any ideas?
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Comment By: https://www.google.com/accounts ()
Date: 2010-06-22 17:21
Message:
Thanks for the suggestions and thanks for taking a look.
I'm using the stock 3321-byte api.php from MediaWiki 1.15.4, downloaded
straight from mediawiki.org, dated 2009-05-05 (extracted from the tarball
via tar zxf). I am using a default (apt-get) install of python 2.6.4 on a
fresh install of Ubuntu 10.04, and I just checked out the latest
pywikipediabot from svn via svn co
http://svn.wikimedia.org/svnroot/pywikipedia/trunk/pywikipedia pywikipedia
several hours ago. I've disabled the confusing mess that is AppArmor, so
there should be no issues there.  My terminal is set to UTF-8 encoding.
I get the same problem with python 2.5.4 (e.g., "python2.5 login.py"), but
only on this particular machine.
I have made no changes to urllib2, which is what login.py imports by
default, and I have made no changes to urllib, which is what a default
family file imports.
The family file I am using was created on a Mac in vim. As far as I know,
vim doesn't add UTF-16 BOMs unless explicitly asked to do so, and I have
not explicitly done that. Just in case, on the linux box, I created a new
file and copy-pasted the family file text into it, renamed the old one,
renamed the new one properly, deleted all .pyc files, and I still get this
error. I have changed urllib2 to urllib and vice versa in each, both, and
neither of login.py and the family file, all with the same result.
Here is some more error output, although I am not sure if it helps:
ERROR: ApiGetDataParse caused error No JSON object could be decoded
127.0.0.1
/scriptpath/api.php?. Dump
ApiGetDataParse_FamilyName_en__Tue_Jun_22_18-54-23_2010.dump created.
Traceback (most recent call last):
  File "login.py", line 437, in <module>
    main()
  File "login.py", line 433, in main
    loginMan.login()
  File "login.py", line 320, in login
    cookiedata = self.getCookie(api)
  File "login.py", line 182, in getCookie
    response, data = query.GetData(predata, self.site, sysop=self.sysop,
back_response = True)
  File "/home/user/bots/pywikipedia/query.py", line 170, in GetData
    raise lastError
ValueError: No JSON object could be decoded
It looks like BeautifulSoup.py (starting at 1828) should strip out any
<feff> BOMs and replace them with null characters, but it doesn't seem to
be doing that.
I'm using completely stock installs of everything, straight from svn,
repositories, and official websites. My family file is built straight from
the template, and it is identical to the one that works on the Mac and on
an Ubuntu 8.04 install of the same wiki.
I have tried
python login.py -v -clean
and I get the following when viewing the dumpfile via cat:
Error reported: No JSON object could be decoded
127.0.0.1
/hcrscript/api.php?action=logout&format=json
[]
and this, when viewing the dumpfile in vim:
Error reported: No JSON object could be decoded
127.0.0.1
/hcrscript/api.php?action=logout&format=json
<feff>[]
As for other potentially-relevant info, I am using short URLs via
httpd.conf aliases, but this should make no difference at all, as it works
on other systems running php 5.2 and apache 2.2.
alias /scriptpath /path/to/scriptpath
alias /wiki /path/to/scriptpath/index.php
I have /scriptpath set as as the scriptpath in my family file, and my
api.php call is to '%s/api.php' (I have also tried u'%s/api.php' to try to
get BeautifulSoup to convert any errant unicode - I still get the identical
errors).
My syslog and /var/log/messages show no errors, and apache reports "POST
/hcrscript/api.php HTTP/1.1" 200".
I've tried uncommenting the "raise NotImplementedError" line in my family
file and commenting out use_api_login = True in my user-config.py file (or
leaving it as-is), but this just returns:
API disabled because this site does not support.
Retrying by ordinary way...
Logging in to Wiki:en as UserName
Login failed. Wrong password or CAPTCHA answer?
I'm completely stumped.
Thanks for any suggestions/advice you may have....
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Comment By: Merlijn S. van Deen (valhallasw)
Date: 2010-06-22 09:59
Message:
The <feff> is a UTF-16 BOM. Either urllib was changed, or you made some
change to api.php, accidentally adding it. Could you double-check if your
api.php is unchanged from the original mediawiki files (in other words:
replace it with an orginal from SVN/release)?
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Comment By: https://www.google.com/accounts ()
Date: 2010-06-22 09:06
Message:
Looking at some earlier logs, I see that this problem first appeared when I
upgraded from Python 2.6.1 to 2.6.2 in May. I am surprised that I seem to
be the only person having this problem.
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