Spot any errors? let me know, but Unleash your pedant politely please.

Wednesday, 30 January 2013

Not so stupid after all

Further to Sometimes I Feel Stupid and Still feeling a bit stupid, a small victory has been made in using requests with the ProjectPlace API.  I still have to make some significant changes, but main hurdle of actually getting a response has been, er, hurdled.

Nothing clever on my part at all, other then patience, the work of others and a tiny epiphany.  Where by 'epiphany', I mean to say I used my noodle briefly.

Having noticed that Requests was up to 1.1.0, I installed this new version…

$ sudo pip install requests --upgrade

This didn't work.  Fortunately though, I'd logged the errors I was getting in the previous posts. The error has regressed. I took a look at the documentation for Oauth, which reminded me that the Oauth gubbins that requests uses had been split out to requests-oauthlib.

I done another pip [sic]…

$ sudo pip install requests-oauthlib --upgrade

This time I got ValueError, which was new…

Traceback (most recent call last):
  File "/Users/bob/Dropbox/Coding/Python/ProjectPlace (requests)/requests_test.py", line 26, in 
    r = requests.get(u'https://api.projectplace.com/1/user/me/profile.json', auth=auth)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/requests/api.py", line 55, in get
    return request('get', url, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/requests/api.py", line 44, in request
    return session.request(method=method, url=url, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/requests/sessions.py", line 276, in request
    prep = req.prepare()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/requests/models.py", line 227, in prepare
    p.prepare_auth(self.auth)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/requests/models.py", line 400, in prepare_auth
    r = auth(self)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/requests_oauthlib/core.py", line 53, in __call__
    unicode(r.url), unicode(r.method), None, r.headers)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/oauthlib/oauth1/rfc5849/__init__.py", line 228, in sign
    raise ValueError('Body signatures may only be used with form-urlencoded content')
ValueError: Body signatures may only be used with form-urlencoded content

Had I been paying attention, there was a pretty big clue at the end…

ValueError: Body signatures may only be used with form-urlencoded content

I wasn't paying attention though, so I added an exception handler to ensure that I would run through all signature types. and to get a bit more information. This wasn't a complete waste of time…

Running this code…

import requests
from requests_oauthlib import OAuth1


#Hywel:
consumer_key        = "That"
consumer_secret     = "would"
access_token_key    = "be"
access_token_secret = "telling"

for signature_type in ('auth_header','body','query'):
    auth = OAuth1(client_key            = consumer_key,
                  client_secret         = consumer_secret,
                  resource_owner_key    = access_token_key,
                  resource_owner_secret = access_token_secret,
                  signature_type        = signature_type)
    try:
       r = requests.get(u'https://api.projectplace.com/1/user/me/profile.json', auth=auth)
    except ValueError,e:
       print 'Exception for %s:%s'%(signature_type,e)
       print
    else:
        print 'No Exception for %s'%signature_type
           
    print signature_type
    print r.encoding
    print r.text
    print r.json


Gave me these very useful results…


No Exception for auth_header
auth_header
None
{"province": "", "city": "", "first_name": "Hywel", "last_name": "Thomas", "address2": "", "home_phone": "", "language": "english", "title": "Software Tester", "work_phone": "", "address1": "", "description": "", "id": that, "email": "would", "mobile_phone": "+be", "avatar": "/images/00/1f/34/da6c-a6d5a995.jpeg", "country_code": "GB", "organisation_homepage": "", "sort_name": "Thomas, Hywel", "homepage": "", "organisation_name": "Telling", "zip_code": ""}
[bound method Response.json of [Response [200]]


Exception for body:Body signatures may only be used with form-urlencoded content

body
None
{"province": "", "city": "", "first_name": "Hywel", "last_name": "Thomas", "address2": "", "home_phone": "", "language": "english", "title": "Software Tester", "work_phone": "", "address1": "", "description": "", "id": that, "email": "would", "mobile_phone": "+be", "avatar": "/images/00/1f/34/da6c-a6d5a995.jpeg", "country_code": "GB", "organisation_homepage": "", "sort_name": "Thomas, Hywel", "homepage": "", "organisation_name": "Telling", "zip_code": ""}
[bound method Response.json of [Response [200]]


No Exception for query
query
None
{"province": "", "city": "", "first_name": "Hywel", "last_name": "Thomas", "address2": "", "home_phone": "", "language": "english", "title": "Software Tester", "work_phone": "", "address1": "", "description": "", "id": that, "email": "would", "mobile_phone": "+be", "avatar": "/images/00/1f/34/da6c-a6d5a995.jpeg", "country_code": "GB", "organisation_homepage": "", "sort_name": "Thomas, Hywel", "homepage": "", "organisation_name": "Telling", "zip_code": ""}
[bound method Response.json of [Response [200]]

I don't fully understand what Body signatures may only be used with form-urlencoded content means at the moment, but I kind of don't care. I think I just need to know that with the latest versions of requests and requests-oauthlib installed and a signature_type of 'auth_header' or 'query', I should be good to go.

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