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POCan't OAuth with Facebook; what are my next debugging steps?
 

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  1. POCan't OAuth with Facebook; what are my next debugging steps?
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    <p>I've got a Django template that initiates the <a href="https://developers.facebook.com/docs/authentication/" rel="nofollow">Facebook OAuth process</a> by doing:</p> <pre><code>window.location='https://www.facebook.com/dialog/oauth?client_id=MY_CLIENT_ID&amp;redirect_uri=http%3A//localhost%3A8000/fbpanel/explore-python' </code></pre> <p>Then, in my Django view, I get the resulting code as follows:</p> <pre><code>import cgi import urllib # [...] code = request.GET['code'] args = { 'client_id': MY_CLIENT_ID, 'redirect_uri': 'http://localhost:8000/fbpanel/explore_python' 'client_secret': MY_CLIENT_SECRET, 'code': code, } url = 'https://graph.facebook.com/oauth/access_token?' + \ urllib.urlencode(args) raw_response = urllib.urlopen(url).read() response = cgi.parse_qs(raw_response) if response: error = '' if response['access_token']: access_token = response['access_token'][0] if response['expires']: expires = response['expires'][0] else: access_token = 'No access token returned' expires = 'No expiration given' error = raw_response </code></pre> <p>Invariably, <code>response</code> is <code>None</code> and <code>raw_response</code> contains <code>Error: {"error":{"message":"Error validating verification code.","type":"OAuthException"}}</code></p> <p>The same credentials validate fine with the <a href="https://developers.facebook.com/docs/reference/javascript/" rel="nofollow">JavaScript SDK</a>. I was binding my server to <code>localhost</code> in that case too, and have <code>localhost:8000</code> set in my official app domain. Before I did that, the JavaScript wouldn't work. After, it did. So I don't think <code>localhost</code> is the issue.</p> <p>I've manually stepped through the code, printing the <code>code</code> returned by FB out, then manually running the above code line by line in the python interpreter, and I can't see anything I'm doing wrong. What are my next debugging steps? The FB documentation offers little guidance if you receive an <code>OAuthException</code>.</p>
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      1. POCan't OAuth with Facebook; what are my next debugging steps?
      1. USHumble Learner
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    1. COI don't see anything wrong with your code either, although I'm not great with python. I also doubt the localhost is the problem, as I would expect the error message to mention redirect_uri in that case (which it should do if you mangle the redirect_uri param on purpose as a test). Have you tried printing out the value of `url` and entering it manually into the browser location bar?
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      1. USFloyd Wilburn
    2. COI just noticed...you have `explore-python` (with a hyphen) in one place and `explore_python` (with an underscore) in another...is that in the actual code?
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      1. POCan't OAuth with Facebook; what are my next debugging steps?
      1. USFloyd Wilburn
    3. COThat was it, @FloydWilburn. If your redirect_uri doesn't *exactly* match in the token request and the code request, FB will fail to authenticate you. If you move your suggestion to an answer, I'll accept it.
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      1. USObscureRobot
 

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