问题
I am running the android app HelloFacebookSample from Facebook on my phone.
The native Facebook app is NOT installed.
When I try to login via my WiFi network the login process stalls at > D/FacebookSDK.WebDialog(6404): Webview loading URL: https://m.facebook.com/dialog/oauth?display=touch&client_id=XXX38988221028&scope=&type=user_agent&redirect_uri=fbconnect%3A%2F%2Fsuccess <
...and all I get is this blank white dialog popup with the close button (x) in the upper left corner.
So far so bad, but when I switch off the wireless on my phone and force a connection via 3G it works.
I know it sounds crazy but that's how it is. If I switch to Wi-Fi it stalls, with 3G it works again.
If I put the "https://m.facebook.com/dialog/..." url in mobile Chrome I get an Internal Server Error 500 when I am on Wi-FI and I get the expected login page when I am on the 3G.
Now I am just looking for ideas as to why this could be so.
Could it be that Facebook is blocking my IP? (Id did many repeated tests, allowing, removing the app etc.)
NOTE: The "https://m.facebook.com/dialog/..." url works from my desktop browser over said Wi-Fi connection. So if there was blocking of any kind it would have to be against a combination of IP and user agent.
UPDATE: I also tried it from another Wi-Fi network and it worked as expected. So it really seems that I got a specific "Internal Server 500" from Facebook from that IP/device?!
回答1:
The reason in my case must have been the IP/User-Agent combination that was blacklisted by Facebook:
When I tried with the same device from another Wi-Fi network (i.e. with another IP) then the connection to Facebook worked as expected.
Or if I used the same Wi-Fi with another User-Agent (i.e. other browser) then it worked as expected too.
来源：https://stackoverflow.com/questions/15589114/internal-server-500-from-facebook-with-sepcific-ip-user-agent-combination