Django应用Facebook OAuth登录重定向URL配置问题求助

Hey there, let’s work through this Facebook login issue together—it’s totally frustrating when you’ve already added the redirect URL and still hit errors. Let’s break down some common fixes and checks you might have missed:

1. Verify the Redirect URL Protocol (HTTPS vs HTTP) #

Facebook requires production redirect URLs to use HTTPS (with rare exceptions for local development). Your current URL uses http://, but Heroku apps support HTTPS out of the box. Try updating the redirect URI in your Facebook Developer Dashboard to:
https://byzantium-travel.herokuapp.com/auth/complete/facebook/

Also, add this setting to your Django settings.py to ensure your app generates HTTPS-compliant redirects:

SOCIAL_AUTH_REDIRECT_IS_HTTPS = True

This tells Django’s social auth library to match Facebook’s HTTPS requirement.

2. Double-Check Facebook Developer Dashboard Settings #

Small details here often cause big issues—let’s confirm:

• Navigate to Products > Facebook Login > Settings
• Ensure your full HTTPS redirect URL is listed under Valid OAuth Redirect URIs (no typos, extra slashes, or missing segments)
• Check if your app is stuck in Development Mode: if it is, only users added as "Test Users" can log in. Toggle to Live Mode once you’re ready for broader access.

3. Validate Django’s Core Configurations #

• Make sure byzantium-travel.herokuapp.com is included in your ALLOWED_HOSTS in settings.py:

  ALLOWED_HOSTS = ['byzantium-travel.herokuapp.com', 'localhost'] # add other hosts as needed
  

• Confirm your Facebook auth credentials are correctly set:

  SOCIAL_AUTH_FACEBOOK_KEY = 'your-facebook-app-id'
  SOCIAL_AUTH_FACEBOOK_SECRET = 'your-facebook-app-secret'
  

4. Rule Out Cached Data Interference #

Old browser cookies or cached auth sessions can throw off the flow. Try:

• Clearing your browser’s cache and cookies
• Testing the login flow in an incognito/private window to bypass cached data

5. Dig Into Specific Error Logs #

If none of the above works, get precise details from logs:

• Check your Django app’s Heroku logs via heroku logs --tail for error codes or descriptions tied to the Facebook auth flow
• In the Facebook Developer Dashboard, go to Events Manager > Login Events to see detailed logs of failed attempts—this will often flag issues like invalid redirects, missing permissions, or misconfigured app settings

Give these steps a shot, and let me know if you find a specific error message or if one of these fixes resolves the issue!

内容的提问来源于stack exchange，提问作者Lennie