Re: Detecting Internet

FROM : Jerry Krinock
DATE : Sat Jul 15 02:01:17 2006

on 06/07/14 14:06, Gerriet M. Denkmann at <email_removed> wrote:

> On 14.07.2006, at 17:49, Jerry Krinock <<email_removed>> wrote:


>> Create and load an NSURLConnection.  If you're not connected to the
>> internet, you immediately get an NSURLResponse with a -1009 status
>> code.

>
> Just tried it.... [describes something different]


No, Garriet, you did not try what I said.  Here is some code to get you
started:

NSURL* url = [NSURL urlWithString:@"http://www.apple.com"] ;
NSURLRequest* request=[NSURLRequest requestWithURL:url
                            cachePolicy:NSURLRequestReloadIgnoringCacheData
                      timeoutInterval:65536.0];
// since timeoutInterval is broken, I set it to a large value and
// use an "external" NSTimer to time out.

NSURLConnection* connection = [NSURLConnection
          connectionWithRequest:mutableRequest delegate:self] ;

In the documentation for these methods you'll find a link to  the "URL
Loading System" document which you should read.  Short answer: After
executing the above code, your delegate will recieve one of two messages,
either -connection:didReceiveResponse: or -connect:didFailWithError:.  If
you don't have an internet connection, you'll get the latter, within
milliseconds, and when you unpack the status code of that "error" (the
second argument), you'll find that it is -1009.  Bingo.  No internet
connection.

If you're not using that NSURLConnection for anything else, it's a kludge,
but it works.