AttributeError: 'module' object has no attribute 'urlsafe_b64encode'

[peter@…]

How to Reproduce

While doing a GET operation on /admin, Trac issued an internal error.

This error is thrown on all pages if the TracAccountManager plugin is installed. Disabling the plugin resolves the issue.

Request parameters:

{'cat_id': None, 'panel_id': None, 'path_info': None}

User Agent was: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10_5_3; en-us) AppleWebKit/525.18 (KHTML, like Gecko) Version/3.1.1 Safari/525.20

System Information

Trac	0.11
Python	2.3.5 (#2, Oct 16 2006, 19:19:48) [GCC 3.3.5 (Debian 1:3.3.5-13)]
setuptools	0.6c8
MySQL	server: "5.0.24a-standard-log", client: "5.0.16", thread-safe: 1
MySQLdb	1.2.2
Genshi	0.5
Pygments	0.9
Subversion	1.4.2 (r22196)
jQuery:	1.2.3

Python Traceback

Traceback (most recent call last):
  File "/home/.omaha/padams/packages/lib/python2.3/site-packages/Trac-0.11-py2.3.egg/trac/web/main.py", line 423, in _dispatch_request
    dispatcher.dispatch(req)
  File "/home/.omaha/padams/packages/lib/python2.3/site-packages/Trac-0.11-py2.3.egg/trac/web/main.py", line 208, in dispatch
    template, data, content_type = \
  File "/home/.omaha/padams/packages/lib/python2.3/site-packages/Trac-0.11-py2.3.egg/trac/web/main.py", line 299, in _post_process_request
    resp = f.post_process_request(req, *resp)
  File "build/bdist.linux-i686/egg/acct_mgr/web_ui.py", line 537, in post_process_request
  File "build/bdist.linux-i686/egg/acct_mgr/web_ui.py", line 574, in _gen_token
AttributeError: 'module' object has no attribute 'urlsafe_b64encode'

[Jonas Borgström]

Why was this resolved as fixed?

[Noah Kantrowitz]

Error is coming from the accountmanager plugin, not Trac. Please file a ticket on trac-hacks for this.

[Noah Kantrowitz]

Just because I looked in to the issue anyway, the function in question wasn't added until Python 2.4. From the documentation of the base64 module I don't see a workaround, so this functionality (email verification) will not be available to 2.3 users.

[ravi.chhabra@…]

I tried to resolve this by adding the doing this:

ln -s /usr/bin/python2.3 $HOME/bin/python
export PATH="$HOME/bin:$PATH"

After doing this my trac installer script correctly tries to get packages for 2.4 and install trac and I get it running. Yet I can't change or add emails to user and the error still occurs. The output from trac is still showing Python version is 2.3. It is possible that somewhere in trac source the shebang is hardcoded to use /usr/bin/python instead of /bin/python? If so where do I change this? Thanks.

[pbass98@…]

Confirmed ravi's report, with trac 11.2.1. Installed fine using local (pathed) python 2.4.4, but reverts to python 2.3.5 (I assume /usr/bin) in shared hosting environment.

User Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.5) Gecko/2008121623 Ubuntu/8.10 (intrepid) Firefox/3.0.5 Trac: 0.11.2.1 Python: 2.3.5 (#2, Oct 16 2006, 19:19:48) [GCC 3.3.5 (Debian 1:3.3.5-13)] setuptools: 0.6c9 SQLite: 3.2.1 pysqlite: 2.0.5 Genshi: 0.5.1 Pygments: 1.0 Subversion: 1.4.2 (r22196) jQuery: 1.2.6

[Noah Kantrowitz]

To repeat, the accountmanager plugin isn't compatible with 2.3. This is not an issue with Trac, but with the plugin.

[John Hampton]

This can be avoided by adding the following to the [components] section of your trac.ini

acct_mgr.web_ui.emailverificationmodule = disabled
acct_mgr.web_ui.registrationmodule = disabled