Question

I have some code here:

(...)
NSURLConnection *theConnection = [[NSURLConnection alloc] 
                initWithRequest:theRequest delegate:self];
if( theConnection )
{
    webData = [[NSMutableData data] retain];
}

and delegate methods:

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{   
    NSLog(@"zero");
   [webData setLength: 0];
}

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    NSLog(@"got %d", [data length]);
    [webData appendData:data];
}

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    NSLog(@"ERROR with theConenction");
    [connection release];
    [webData release];
}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{

    NSLog(@"DONE. Received Bytes: %d", [webData length]);
    [connection release];
    [webData release];      
}

It works pretty good untill more data has to come.
Than NSURLConnection “stop working” (with no error, no exception, no quit). I can still use my app.
I noticed that problem begin when didReceiveData is being called more than once during the connection.

How it looks like step by step from debugger:

1. I call theRequest
2. Delegate call didReceiveResponse

2010-06-21 18:10:16.708 MyApp[9477:207] zero

3. Delegate call didReceiveData

2010-06-21 18:10:16.709 MyApp[9477:207] got 6912

(gdb) continue

4. Delegate call didReceiveData (once again)

2010-06-21 18:10:18.027 MyApp[9477:207] got 114067

(gdb) continue

--> and here is the problem <--

main loop continue with no breakpoint, and connectionDidFinishLoading is not called.
Everything is ok when didRecieveData is being called just once.

5. Delegate call didFailWithError (after 5 min!)

2010-06-21 18:15:18.041 MyApp[9477:207] ERROR with theConenction
Connection failed! Error – The operation couldn’t be completed. Connection reset by peer

(gdb) continue

=============== UPDATE ====================

Finally, I have discovered one important thing: True problem is that remote host doesn’t finish connection in proper way sometimes (ie. big amount of data), so delegate connectionDidFinishLoading can’t be called and after 5 min remote host reset connection.

Has anyone the problem too and can help?

Answer 1

Finally, I’ve workarounded the issue using ASIHTTPRequest