Question

I want to check if a web host is available so i used the code down below, it works, but sometimes if the site is slow in response it keep waiting, how do i implant a timeout into it? if no response from the host withen 2-3 second, return false also. Please help me out

- (BOOL)isDataSourceAvailable {

    static BOOL checkNetwork = YES;
    static BOOL _isDataSourceAvailable = NO;
    if (checkNetwork) { // Since checking the reachability of a host can be expensive, cache the result and perform the reachability check once.
        checkNetwork = NO;
        Boolean success;
        const char *host_name = "google.com"; //HOST
        SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithName(NULL, host_name);
        SCNetworkReachabilityFlags flags;
        success = SCNetworkReachabilityGetFlags(reachability, &flags);
        _isDataSourceAvailable = success && (flags & kSCNetworkFlagsReachable) && !(flags & kSCNetworkFlagsConnectionRequired);
        CFRelease(reachability);
    }
    return _isDataSourceAvailable;
}

Answer 1

Its quite simple

Just implement NSTimer

Example

[NSTimer scheduledTimerWithTimeInterval:2.0
    target:self
    selector:@selector(targetMethod:)
    userInfo:nil
    repeats:NO];

if targetMethod: is called, then its timeout.

Here don’t forget to call

[myTimer invalidate];
myTimer = nil;

if you receive response from server.

Hope this helps you.