network.m

 NSString *url = @"https://www.google.com";
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    //   [request setValue:@"api.example.com" forHTTPHeaderField:@"Host"];
    [request setValue:@"http://www.examplegood.com/" forHTTPHeaderField:@"Referer"];
    [request setURL:[NSURL URLWithString:url]];
    [request setHTTPMethod: @"GET"];
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
        NSLog(@"%@",response);
        NSLog(@"%@",error);
        NSString* resultStr = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
        NSLog(@"result:%@",resultStr);
    }];