"TypeError: cannot concatenate 'str' and 'NoneType' objects" on request to get a file.

[athanassis]

I'm trying to download a file which is accessible (via a browser) on this URL:
https://test.sharepoint.com/sites/team/team documents/subfolder/document.docx

I'm using a ClientRequest object with the following code:

url = "https://test.sharepoint.com/sites/team"
username="[email protected]"
password="pass"
ctxAuth = AuthenticationContext(url)
if ctxAuth.acquire_token_for_user(username, password):
    print 'authentication successful, proceeding...'
    request = ClientRequest(ctxAuth)
    requestUrl="{0}/_api/web/getfilebyserverrelativeurl('team documents/subfolder/document.docx')"
    options=RequestOptions(requestUrl.format(url))
    data = request.execute_query_direct(options)

On running this, I'm getting the following trace:

$ python test.py
No handlers could be found for logger "client.office365.runtime.auth.saml_token_provider.SamlTokenProvider.process_service_token_response"
authentication successful, proceeding...
Traceback (most recent call last):
  File "test.py", line 14, in <module>
    data = request.execute_query_direct(options)
  File "/usr/lib/python2.7/site-packages/client/office365/runtime/client_request.py", line 77, in execute_query_direct
    self.context.authenticate_request(request_options)
  File "/usr/lib/python2.7/site-packages/client/office365/runtime/auth/authentication_context.py", line 20, in authenticate_request
    request_options.set_header('Cookie', self.provider.get_authentication_cookie())
  File "/usr/lib/python2.7/site-packages/client/office365/runtime/auth/saml_token_provider.py", line 65, in get_authentication_cookie
    return 'FedAuth=' + self.FedAuth + '; rtFa=' + self.rtFa
TypeError: cannot concatenate 'str' and 'NoneType' objects

Is there something wrong on how I use the module?

[jimr]

I had a similar problem because our SharePoint instance is running behind a proxy. I had to subclass the SamlTokenProvider to override the login url (self.sts) and cookie names. I think the issue is that during initialization, the code doesn't check the result of acquire_authentication_cookie so if authentication fails you don't hear about it until the cookies are used.

[kimchirichie]

I ran into the same issue. It seems like authentication failures are not handled by exceptions. It only bubbles up when cookies are queried. Check your credentials

[alibux]

Same issue. Checked credentials but issue persists. Any other thoughts? Thanks!

[kimchirichie]

I ended up using OAuth2Session to get oauth2 authentication and grab data from graph api. its been a while and i no longer remember the exact details.

[alibux]

Thanks will check it out.

[cigno5]

Hi, I have the same issue, but in my case I think it's because I have sharepoint configured with FormAuthentication method. No way it will work until the proper token provider is implemented

[exlibris]

I am bumping into this problem too but only if I am using an outlook.com account. I am hoping somebody can explain what is going on behind the scenes and perhaps offer a solution. Here is a brief explanation:

1. Our SharePoint site is in the cloud (https://mn365.sharepoint.com)
2. When I make the connection to the site using my State of Minnesota credentials, it connects just fine.
3. But since I don't want to have my own credentials embedded in my application, I created a "service account" along the lines of "[email protected]". This account fails.

What would be the different in authentication between using an outlook.com address and one issued by my organization (in this case [email protected]?

[wontfixthis]

Same problem here. We're using AD FS for authentication. Till now I didn't found any way to get any information from our sharepoint online server. I tried a lot of libraries but nothing worked for me.

[jvandenbroeck]

I had the same error because sharepoint was redirecting for authentication to the on-prem STS/ADFS.

We created a new O365 user directly in O365 so it doesn't use the redirect to the on-prem STS/ADFS. This resolved the error 👍

[wontfixthis]

I switched to sharepy, which runs ootb and covers my conditions

[ponnet]

Same here:
No handlers could be found for logger "office365.runtime.auth.saml_token_provider.SamlTokenProvider._process_service_token_response"

Any luck from others?

[henkmuller]

Maybe the following helps to narrow it down further.

I can successfully authenticate on the general sharepoint URL, but not on a URL that is pointing to a specific teams-channel. The following bit of code works fine:

url = "https://COMPANYNAME.sharepoint.com/"
username=raw_input("username: ")
password=raw_input("password: ")
ctx_auth = AuthenticationContext(url=url)
if ctx_auth.acquire_token_for_user(username=username, password=password):

But when I replace the URL with:

url = "https://COMPANYNAME.sharepoint.com/sites/TEAMSCHANNEL/"

then I get the following error::

No handlers could be found for logger "office365.runtime.auth.saml_token_provider.SamlTokenProvider.acquire_authentication_cookie"

Any work-around appreciated - in my browser I can see both of them just fine.

[BrennanGit]

We found a workaround for the above use case. Just use the base url for getting the AuthenticationContext. New ClientContext objects can be created using different urls.

base_url = "https://COMPANYNAME.sharepoint.com/"
ctx_auth = AuthenticationContext(url=base_url)
if not ctx_auth.acquire_token_for_user(username=user, password=password):
    sys.exit('Error in getting token - quitting')
url = base_url + "sites/TEAMSCHANNEL/"
ctx = ClientContext(url, ctx_auth)
..
..

[vgrem]

Hey guys!

Since the moment when this issue was reported until now the following improvements/bug fixes have been made in terms of support for SAML-based federated authentication with SharePoint Online:

• Unable to conect to Sharepoint(acquire_authentication_cookie error if federated) #210 - Unable to connect to SharePoint(acquire_authentication_cookie error if federated)
• An error occurred while retrieving token: AADSTS50126: Error validating credentials due to invalid username or password. #170 - An error occurred while retrieving token: AADSTS50126: Error validating credentials due to invalid username or password
• Using Office-365-REST with ADFS? #85 - Using Office-365-REST with ADFS
• Sites with on-premise STS does not authenticate (AADSTS70002) #84 - Sites with on-premise STS does not authenticate (AADSTS70002)

So, the provided error should no longer occur, just make sure to grab the latest version (2.1.10.1 or above).