python requests handle error 302?

Question

I am trying to make a http request using requests library to the redirect url (in response headers-Location). When using Chrome inspection, I can see the response status is 302.

However, in python, requests always returns a 200 status. I added the allow_redirects=False, but the status is still always 200.

The url is https://api.weibo.com/oauth2/authorize?redirect_uri=http%3A//oauth.weico.cc&response_type=code&client_id=211160679
the first line entered the test account: moyan429@hotmail.com
the second line entered the password: 112358

and then click the first button to login.

My Python code:

import requests

user_agent = 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.152 Safari/537.36'
session = requests.session()
session.headers['User-Agent'] = user_agent
session.headers['Host'] = 'api.weibo.com'
session.headers['Origin']='https://api.weibo.com'
session.headers['Referer'] ='https://api.weibo.com/oauth2/authorize?redirect_uri=http%3A//oauth.weico.cc&response_type=code&client_id=211160679'
session.headers['Connection']='keep-alive'

data = {
    'client_id': api_key,
    'redirect_uri': callback_url,
    'userId':'moyan429@hotmail.com',
    'passwd': '112358',
    'switchLogin': '0',
    'action': 'login',
    'response_type': 'code',
    'quick_auth': 'null'
}

resp = session.post(
    url='https://api.weibo.com/oauth2/authorize',
    data=data,
    allow_redirects=False
)
code = resp.url[-32:]
print code

That's because you get an error; something is wrong with your request still. — Martijn Pieters, May 15 '15 at 17:51
To everyone pointing out the username and password: the *API key* is missing, and the OP stated this is a *test account*. — Martijn Pieters, May 15 '15 at 17:53
I also notice there is a Captcha on the page, as well as other parameters you did not specify. Have you tried looking for documentation as to what their oauth2 API requires? — Martijn Pieters, May 15 '15 at 18:02
this thread helped me https://stackoverflow.com/questions/22150023/http-redirection-code-3xx-in-python-requests _italic_ — Edwin Paz ss. -, Oct 15 '21 at 23:31
Thank you for apprising me for the `allow_redirects` arg, I was not able to get the necessary cookies because the page that provided them was being redirected away — Amon, Jun 08 '23 at 20:10

score 7 · Accepted Answer · answered May 15 '15 at 17:55

7

You are probably getting an API error message. Use print resp.text to see what the server tells you is wrong here.

Note that you can always inspect resp.history to see if there were any redirects; if there were any you'll find a list of response objects.

Do not set the Host or Connection headers; leave those to requests to handle. I doubt the Origin or Referer headers here needed either. Since this is an API, the User-Agent header is probably also overkill.

answered May 15 '15 at 17:55

Martijn Pieters

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thanks for your response. I checked the resp.history, it's empty. and the content of resp.text showed that it still stay in the same page. But when I used browser to login this url, the redirect will happen. – Guixing Wei May 15 '15 at 20:12
@GuixingWei: so you are missing something else. Perhaps the page uses CSRF tokens? Perhaps you need to `GET` the login page first to get the session cookie? – Martijn Pieters May 15 '15 at 20:21
appreciate a lot for your suggestion. I fixed this problem. Yes,your idea is right. I need to get the cookie from login page, and then use the cookie to get the authorization page. Thanks so much for this idea!! – Guixing Wei May 16 '15 at 16:41

python requests handle error 302?

1 Answers1