how to check if rtmp or hls urls are exist or they'll give 404 error in swift

Question

I need to parse some data from rss and open related links from parsed rss in swift 2, for example i want to check this link is valid or not:

rtmp://185.23.1         


        

Answer 1

An Obj-C variation for answer provided by @Moritz:

Note: I was preferring a function instead of a class, but the behavior is the same:

+(void)verifyURL:(NSString*)urlPath withCompletion:(void (^_Nonnull)(BOOL isOK))completionBlock
{
    NSURL *url = [NSURL URLWithString:urlPath];
    if (url) {
        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
        request.HTTPMethod = @"HEAD";
        //optional: request.timeoutInterval = 3;
        NSURLSessionDataTask *dataTask = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
        {
            BOOL isOK = NO;
            if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
                int code = (int)((NSHTTPURLResponse*)response).statusCode;
                //note: you may want to allow other http codes as well
                isOK = !error && (code == 200);
            }
            completionBlock(isOK);
        }];
        [dataTask resume];
    } else {
        completionBlock(NO);
    }
}

and here is a call with timestamps:

NSDate *date1 = [NSDate date];
[AppDelegate verifyURL:@"http://bing.com" withCompletion:^(BOOL isOK) {
    NSDate *date2 = [NSDate date];
    if (isOK) {
        NSLog(@"url is ok");
    } else {
        NSLog(@"url is currently not ok");
    }
    NSTimeInterval diff = [date2 timeIntervalSinceDate:date1];
    NSLog(@"time to return: %.3f", diff);
}];