Occasionally header gets corrupted about mbwebsocketserver HOT 3 OPEN

// MBWebSocketServer.m
    NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

    // This is a check to see if there are duplicate headers
    [self fixDuplicateHeader:&string];

// MBWebSocketServer.m
- (void)fixDuplicateHeader:(NSString **)headerString {
    // Setup
    NSString *lastHandshake = @"";
    NSString *getStr = @"GET / HTTP/1.1\r\n";
    NSScanner *scanner = [NSScanner scannerWithString:*headerString];

    [scanner scanUpToString:getStr intoString:&lastHandshake]; // Scan all characters before GET str
    if (lastHandshake) {
        while (![scanner isAtEnd]) {
            [scanner setScanLocation:([scanner scanLocation]+getStr.length)];
            //[scanner scanString:@"GET / HTTP/1.1\r\n" intoString:nil]; // Scan the GET str
            [scanner scanUpToString:getStr intoString:&lastHandshake]; // Scan all characters before next GET str
        }
        *headerString = [NSString stringWithFormat:@"%@%@",getStr,lastHandshake];
        NSLog(@"[Server] Removed a duplicate header sent from client");
    }
}