Geek asks and answers

Oauth2client / appengine.py returns "InvalidResponseError: header values ​​must be str, received" unicode "" using webapp2 / python27 / wsgi

Previously, my problem is similar to the question Pyramid on App Engine gets the value InvalidResponseError: the header values ​​must be str, received "unicode" and several google-api-python-client errors , but none of them helped me in this matter. Also, I did not have an answer to issue # 254 (which in itself is similar to # 111 , so I am trying here.

In local GAE, the simple example below (a simplified version of this sample ) returns InvalidResponseError: header values must be str, got 'unicode', although my code does not configure the unicode header. More precisely, I expect a result Hello, and instead I have:

Internal Server Error
    The server has either erred or is incapable of performing the requested operation.
    Traceback (most recent call last):
      File "/home/ronj/.gae/lib/webapp2-2.5.2/webapp2.py", line 1546, in __call__
        return response(environ, start_response)
      File "/home/ronj/.gae/lib/webob_0_9/webob/__init__.py", line 2000, in __call__
        start_response(self.status, self.headerlist)
      File "/home/ronj/.gae/google/appengine/runtime/wsgi.py", line 156, in _StartResponse
        (_GetTypeName(value), value, name))
    InvalidResponseError: header values must be str, got 'unicode' (u'https://accounts.google.com/o/oauth2/auth?state=http%3A%2F%2Flocalhost%3A8080%2F&redirect_uri=http%3A%2F%2Flocalhost%3A8080%2Foauth2callback&response_type=code&client_id=xxxxxxxxxxxx.apps.googleusercontent.com&scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fyoutube&access_type=offline') for 'Location'

Any idea? I am using GAE 1.7.5 on Python 2.7.3 on Ubuntu 12.10 x64.

EDIT: Jonas issue # 254: " str() OAuth2WebServerFlow, URL-. str() 830 oauth2client/client.py".
→ , ? , , GAE, Google GAE, ? ? ( )

!

app.yaml

application: yourapp
version: 1
runtime: python27
api_version: 1
threadsafe: true

handlers:

- url: /
  script: yourapp.main

libraries:
- name: webapp2
  version: latest

yourapp.py

import webapp2, os, httplib2
from apiclient.discovery import build
from oauth2client.appengine import oauth2decorator_from_clientsecrets
from google.appengine.api import memcache

CLIENT_SECRETS = os.path.join(os.path.dirname(__file__), 'client_secrets.json')
MISSING_CLIENT_SECRETS_MESSAGE = "Warning: Please configure OAuth 2.0"
YOUTUBE_READ_WRITE_SCOPE = "https://www.googleapis.com/auth/youtube"
YOUTUBE_API_SERVICE_NAME = "youtube"
YOUTUBE_API_VERSION = "v3"

http = httplib2.Http(memcache)
youtube = build(YOUTUBE_API_SERVICE_NAME, YOUTUBE_API_VERSION, http=http)
decorator = oauth2decorator_from_clientsecrets(
    CLIENT_SECRETS,
    scope=YOUTUBE_READ_WRITE_SCOPE,
    message=MISSING_CLIENT_SECRETS_MESSAGE)


class MainPage(webapp2.RequestHandler):

  @decorator.oauth_required
  def get(self):
    self.response.headers['Content-Type'] = 'text/plain'
    self.response.write('Hello')

main = webapp2.WSGIApplication([('/', MainPage)], debug=True)
+5
3

GAE API- python, , -, . google-api-python-client-1.1, , , .

0

, apiclient.

, , , http://code.google.com/p/google-api-python-client/issues/detail?id=254

flow = client.flow_from_clientsecrets(CLIENT_SECRETS,scope=scopes)
callback = self.request.relative_url('/oauth2callback')
auth_url = flow.step1_get_authorize_url(callback)
return self.redirect(auth_url)


flow = client.flow_from_clientsecrets(CLIENT_SECRETS,scope=scopes)
callback = self.request.relative_url('/oauth2callback')
auth_url = str(flow.step1_get_authorize_url(callback))
return self.redirect(auth_url)

, str() flow.step1_get_authorize_url

+4

Another answer ... adding str () fixes the problem, but not the root cause. I spent several hours trying to understand why one particular redirect raised this error, while others did not, before I noticed that the source "/" was not in the URL for poor redirects.

I have no idea why this is so - perhaps the incomplete path is processed differently than the full path. But if you click this error, try changing:

self.redirect('home.view')

at

self.redirect('/home.view')
+2
source

More articles:


All Articles