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POoauth2client/appengine.py returns "InvalidResponseError: header values must be str, got 'unicode'" with webapp2/python27/wsgi
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copied!<p>Beforehand, my problem is similar to question <a href="https://stackoverflow.com/questions/9934923/pyramid-on-app-engine-gets-invalidresponseerror-header-values-must-be-str-got"><em>Pyramid on App Engine gets "InvalidResponseError: header values must be str, got 'unicode'</em></a>, and several <a href="http://code.google.com/p/google-api-python-client/issues/list" rel="nofollow noreferrer">google-api-python-client bugs</a>, but none helped in my case. Also, I had no answer on <a href="http://code.google.com/p/google-api-python-client/issues/detail?id=254" rel="nofollow noreferrer">issue #254</a> (which itself looks similar to <a href="http://code.google.com/p/google-api-python-client/issues/detail?id=111" rel="nofollow noreferrer">#111</a>, so I'm trying here.</p> <p>On a local GAE, the simple example below (a simplified & python27-ified version of <a href="http://code.google.com/p/google-api-python-client/source/browse/samples/appengine/main.py" rel="nofollow noreferrer">this sample</a>) returns <code>InvalidResponseError: header values must be str, got 'unicode'</code>, though my code is <em>not</em> doing any unicode header setting. More precisely, I'm expecting result <code>Hello</code>, and instead I have:</p> <pre><code>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' </code></pre> <p>Any idea? I am using GAE 1.7.5 on Python 2.7.3 on Ubuntu 12.10 x64.</p> <p><strong>EDIT</strong>: Jonas provided an answer in <a href="http://code.google.com/p/google-api-python-client/issues/detail?id=254" rel="nofollow noreferrer">issue #254</a>: <em>"it should be relatively easy to add some str() into the methods on OAuth2WebServerFlow that generates URLs. Wrap with str() before return on line 830 in oauth2client/client.py"</em>.<br> → That looks great, but how am I supposed to implement that? I agree that I can modify the file on my local machine where I installed GAE, but once deployed it will be Google's GAE that will be used, right? How can I override it? (and sorry for the newbie question)</p> <p>Thanks for your help!</p> <hr> <p><strong>app.yaml</strong>:</p> <pre><code>application: yourapp version: 1 runtime: python27 api_version: 1 threadsafe: true handlers: - url: / script: yourapp.main libraries: - name: webapp2 version: latest </code></pre> <hr> <p><strong>yourapp.py</strong>:</p> <pre><code>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) </code></pre>

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