Hello everyone:

I hope to get the http header info(file size) in asynchronous mode.

So I initialize as codes:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(processReadResponseHeaders:) name:@"readResponseHeaders"
                                           object:nil];

my codes to read the http header

-(void)processReadResponseHeaders: (ASIHTTPRequest *)request ;//(id)sender;
{


    unsigned long long contentLength = [request contentLength]; //error occurs here

}

It has to change the source code of ASIHTTPRequest.m

I did add my codes in function readResponseHeaders to notify the event is triggered )

- (void)readResponseHeaders
{
     //.........................
    [[NSNotificationCenter defaultCenter]  postNotificationName:@"readResponseHeaders"  object:self];//

}

the log file reports:

2010-05-15 13:47:38.034 myapp[2187:6a63] * -[NSConcreteNotification contentLength]: unrecognized selector sent to instance 0x46e5bb0

Welcome any comment

Thanks interdev