vdirsyncer fails on a DAV server with authentication (radicale 0.9-1)

[legrostdg]

vdirsyncer fails on a DAV server with authentication (radicale 0.9-1)

$ .local/bin/vdirsyncer --version
vdirsyncer, version 0.3.1
$ .local/bin/vdirsyncer --verbosity debug sync
debug: Using 0 maximal workers.

Traceback (most recent call last):
  File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/cli.py", line 164, in storage_instance_from_config
    return cls(**config)
  File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/dav.py", line 488, in __init__
    super(CaldavStorage, self).__init__(**kwargs)
  File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/dav.py", line 264, in __init__
    dav_header=self.dav_header)
  File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/dav.py", line 172, in __init__
    'auth': prepare_auth(auth, username, password),
  File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/http.py", line 27, in prepare_auth
    import requests_toolbelt
  File "build/bdist.linux-x86_64/egg/requests_toolbelt/__init__.py", line 21, in <module>
  File "build/bdist.linux-x86_64/egg/requests_toolbelt/multipart/__init__.py", line 16, in <module>
  File "build/bdist.linux-x86_64/egg/requests_toolbelt/multipart/encoder.py", line 12, in <module>
ImportError: cannot import name iter_field_objects

Traceback (most recent call last):
  File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/cli.py", line 164, in storage_instance_from_config
    return cls(**config)
  File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/dav.py", line 488, in __init__
    super(CaldavStorage, self).__init__(**kwargs)
  File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/dav.py", line 264, in __init__
    dav_header=self.dav_header)
  File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/dav.py", line 172, in __init__
    'auth': prepare_auth(auth, username, password),
  File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/http.py", line 27, in prepare_auth
    import requests_toolbelt
  File "build/bdist.linux-x86_64/egg/requests_toolbelt/__init__.py", line 21, in <module>
  File "build/bdist.linux-x86_64/egg/requests_toolbelt/multipart/__init__.py", line 16, in <module>
  File "build/bdist.linux-x86_64/egg/requests_toolbelt/multipart/encoder.py", line 12, in <module>
ImportError: cannot import name iter_field_objects
critical: Failed to initialize my_calendars_remote.
critical: Failed to initialize my_calendars_remote.

cadaver works:

$ cadaver https://dav.example.com
Authentication required for Radicale - Password Required on server `dav.example.com':
Username: user
Password: 
dav:/> ls
Listing collection `/': succeeded.
Coll:   user                                  0  Jan  1  1970

[untitaker]

How did you install vdirsyncer?

[legrostdg]

pip install --user --force-reinstall git+https://github.com/untitaker/vdirsyncer.git

[untitaker]

How did you install vdirsyncer before you reported #138?

[legrostdg]

By cloning khal git repo, and running:

 python setup.py --install --prefix $HOME

[untitaker]

Alright, please try:

pip uninstall requests_toolbelt
pip install --user requests_toolbelt

[legrostdg]

no change :(

[untitaker]

Could you try removing the build directory? I wonder why that is showing up in the traceback.

[legrostdg]

OK. There is a problem in requests_toolbelt or in my version of requests (2.4.3-5).

$ .local/bin/vdirsyncer sync
...
 File "/home/user/.local/lib/python2.7/site-packages/requests_toolbelt/multipart/encoder.py", line 12, in <module>
    from requests.packages.urllib3.filepost import iter_field_objects
ImportError: cannot import name iter_field_objects

$ python
Python 2.7.8 (default, Oct 18 2014, 12:50:18) 
[GCC 4.9.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from requests.packages.urllib3.filepost import iter_field_objects
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name iter_field_objects

[untitaker]

1. Are you on Ubuntu or Debian? If yes, you'll have to take a look at https://vdirsyncer.readthedocs.org/en/latest/problems.html#error-messages
2. Try: pip install --user --upgrade requests requests_toolbelt

[legrostdg]

1. Debian (sid, so python-requests is 2.4.3-5). I don't have the issues listed there https://vdirsyncer.readthedocs.org/en/latest/problems.html#error-messages

2. $ pip install --user --upgrade requests requests_toolbelt
   Requirement already up-to-date: requests in /usr/lib/python2.7/dist-packages
   Requirement already up-to-date: requests-toolbelt in ./.local/lib/python2.7/site-packages
   Cleaning up...

   $ .local/bin/vdirsyncer --verbosity debug sync
   debug: Using 0 maximal workers.

   Traceback (most recent call last):
   File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/cli.py", line 164, in storage_instance_from_config
   return cls(**config)
   File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/dav.py", line 488, in init
   super(CaldavStorage, self).init(**kwargs)
   File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/dav.py", line 264, in init
   dav_header=self.dav_header)
   File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/dav.py", line 172, in init
   'auth': prepare_auth(auth, username, password),
   File "/home/user/.local/lib/python2.7/site-packages/vdirsyncer/storage/http.py", line 27, in prepare_auth
   import requests_toolbelt
   File "/home/user/.local/lib/python2.7/site-packages/requests_toolbelt/init.py", line 21, in
   from .multipart import (
   File "/home/user/.local/lib/python2.7/site-packages/requests_toolbelt/multipart/init.py", line 16, in
   from .encoder import MultipartEncoder, MultipartEncoderMonitor
   File "/home/user/.local/lib/python2.7/site-packages/requests_toolbelt/multipart/encoder.py", line 12, in
   from requests.packages.urllib3.filepost import iter_field_objects
   ImportError: cannot import name iter_field_objects
   critical: Failed to initialize my_calendars_remote.

[legrostdg]

But I don't understand why I can't import iter_field_objects from requests.packages.urllib3.filepost. The funtion is defined in /usr/lib/python2.7/dist-packages/requests/packages/urllib3/filepost.py...

[untitaker]

I honestly think you do have that problem, but with a different error message... can you do:

$ python
Python 3.4.2 (default, Oct  8 2014, 13:44:52)
[GCC 4.9.1 20140903 (prerelease)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests.packages.urllib3.filepost
>>>

[untitaker]

Maybe you have a different version installed as user... take a look at /home/user/.local/lib/python2.7/, and try pip uninstall requests.

[legrostdg]

The system version of requests is the only one I have installed.

That's weird:

$ python
Python 2.7.8 (default, Oct 18 2014, 12:50:18)
[GCC 4.9.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests.packages.urllib3.filepost
>>> requests.packages.urllib3.filepost.iter_field_objects
<function iter_field_objects at 0x7f9759d4f8c0>
>>>> from requests.packages.urllib3.filepost import iter_field_objects
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name iter_field_objects

[legrostdg]

OK, I found the bug: on Debian, /usr/lib/python2.7/dist-packages/requests/packages/urllib3 is a symlink to ../../urllib3, which (I don't know why) don't behave the same as the original urllib3...

$ ls -l /usr/lib/python2.7/dist-packages/requests/packages/urllib3
lrwxrwxrwx. 1 root root 13 Oct 21 10:25 /usr/lib/python2.7/dist-packages/requests/packages/urllib3 -> ../../urllib3

python interpreter:

>>> from urllib3.filepost import iter_field_objects
>>> iter_field_objects
<function iter_field_objects at 0x7f82cfbf0848>
>>> from requests.packages.urllib3.filepost import iter_field_objects
>>> Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name iter_field_objects