CODEWITHSUNDEEP
objective-cioswifi
Marc
Marc

Reputation: 1541

Detect that a WiFi network needs authentication

I am writing an iOS app that used a HTTP web service to get its data. If a user is connected to a WiFi network that requires the user login using some kind of web form (think Starbucks or Wi-Fi at airports) then my app fails with an error 500.

I notice Safari can detect this and launches the authentication page for the user. Is there a standard I can use on to provide this experience, or at least show the user a message asking them to open safari and log in?

Upvotes: 3

Views: 1113

Answers (2)

Cyrille
Cyrille

Reputation: 25144

The basic method is: try to download a file somewhere, that you know will never move, and whose contents you already know. Compare the downloaded content with the content that should be downloaded, and you'll know you're on a captive hotspot or not.

Upvotes: 1

Frank
Frank

Reputation: 15641

You can try with this version of reachability...

It has following intresting methods that can get you started:

// WWAN may be available, but not active until a connection has been established.
// WiFi may require a connection for VPN on Demand.
-(BOOL)isConnectionRequired; // Identical DDG variant.
-(BOOL)connectionRequired; // Apple's routine.
// Dynamic, on demand connection?
-(BOOL)isConnectionOnDemand;
// Is user intervention required?
-(BOOL)isInterventionRequired;

Upvotes: 1

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