[Patch] Unknown encoding error with TracDownloader, Trac 0.11, Py 2.5

[Olemis Lang]

Environment : PIL 1.1.6, PyCaptcha 0.4, TracDownloader, Trac 0.11, tracd, Python 2.5, Windows XP

Task : To install the TracDownloader plugin

Problem : After the installation (either with through web admin, or directly from the command line), once the server (tracd) is restarted and tries to load the aforementioned plugin, the following exception is raised :

Traceback (most recent call last):
  File "C:\Program Files\Python\2.5\Lib\site-packages\trac\web\api.py", line 339, in send_error
    'text/html')
  File "C:\Program Files\Python\2.5\Lib\site-packages\trac\web\chrome.py", line 684, in render_template
    data = self.populate_data(req, data)
  File "C:\Program Files\Python\2.5\Lib\site-packages\trac\web\chrome.py", line 592, in populate_data
    d['chrome'].update(req.chrome)
  File "C:\Program Files\Python\2.5\Lib\site-packages\trac\web\api.py", line 168, in __getattr__
    value = self.callbacks[name](self)
  File "C:\Program Files\Python\2.5\Lib\site-packages\trac\web\chrome.py", line 460, in prepare_request
    for category, name, text in contributor.get_navigation_items(req):
  File "build\bdist.win32\egg\tracdownloader\web_ui.py", line 53, in get_navigation_items
    self.env.href.downloader())
LookupError: unknown encoding: /siscont/downloader

[Olemis Lang]

Tip... the word siscont displayed in the traceback report, is the name of the project environment (folder)

[anonymous]

Almost same on ubuntu 8.04

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/Trac-0.11-py2.5.egg/trac/web/api.py", line 339, in send_error
    'text/html')
  File "/usr/lib/python2.5/site-packages/Trac-0.11-py2.5.egg/trac/web/chrome.py", line 684, in render_template
    data = self.populate_data(req, data)
  File "/usr/lib/python2.5/site-packages/Trac-0.11-py2.5.egg/trac/web/chrome.py", line 592, in populate_data
    d['chrome'].update(req.chrome)
  File "/usr/lib/python2.5/site-packages/Trac-0.11-py2.5.egg/trac/web/api.py", line 168, in __getattr__
    value = self.callbacks[name](self)
  File "/usr/lib/python2.5/site-packages/Trac-0.11-py2.5.egg/trac/web/chrome.py", line 460, in prepare_request
    for category, name, text in contributor.get_navigation_items(req):
  File "build/bdist.linux-i686/egg/tracdownloader/web_ui.py", line 53, in get_navigation_items
    self.env.href.downloader())
LookupError: unknown encoding: /downloader

[izzy]

Until you find a solution, here is a possible work-around: I guess the reason for the failing install will be similar to what happens with Trac 0.10 and TracDownloaderPlugin install - a dependency cannot be resolved. PyCaptcha I could only find for up to Python 2.4! So if you can live without the Captcha (and have it disabled), you may just remove it from the dependencies in the setup.py script - simply remove the lines

  """install_requires = ['PyCAPTCHA >= 0.4',
                         'PIL >= 1.1.5'],"""

The dependency for PIL you already have provided, according to your post :)

I cannot guarantee that this works for you - though it worked for me, the error message looked a bit different...

[anonymous]

See #3338. Mitigates the problem so pages render. Plugin still broken, however.

[Olemis Lang]

Replying to anonymous:

See #3338. Mitigates the problem so pages render. Plugin still broken, however.

This does not work for me :(

However I did this ...

--- C:\Program Files\Python\2.5\Lib\site-packages\TracDownloader-0.1-trac-0.11.egg\tracdownloader\web_ui_bad.py Fri Sep 19 15:15:02 2008
+++ C:\Program Files\Python\2.5\Lib\site-packages\TracDownloader-0.1-trac-0.11.egg\tracdownloader\web_ui.py Thu Sep 18 18:54:23 2008
@@ -49,7 +49,7 @@
     def get_navigation_items(self, req):
         """Downloader isinstance visible if user hasattr got permission """
         if req.perm.has_permission('DOWNLOADER_DOWNLOAD'):
-            yield 'mainnav', 'downloader', Markup('<a href="%s">Downloader</a>' ,
+            yield 'mainnav', 'downloader', Markup('<a href="%s">Downloader</a>' %
                                              self.env.href.downloader())

     # IRequestHandler methods

and it works

[anonymous]

olemis patch is not yet applied in 0.11 version of web_ui.py in r4492

[squalyl@…]

Problem still present in r9844, please apply the patch