A sketch for an implementation of a better NSURLConnection, NiceURLConnection

NiceURLConnection.m

// by Colin Barrett (colin at springs and struts dot com)
// I release this sketch to the community under the MIT License.

// No really this is just a sketch I haven't even compiled it or anything.

// Other ides:
// - Failure & success completion selectors ?
// - Single delegate method called on both success and failure.

@interface NiceURLConnection : NSURLConnection {
@private
    id delegate;
    NSData *data;
    NSURLResponse *response;
    NSError *error; 

    BOOL finished;
}

@property (readonly) NSData *data;
@property (readonly) NSURLResponse *response;
@property (readonly) NSError *error;

@property (readonly, getter=isFinished) BOOL finished;

@end

// -------

@interface NiceURLConnection ()
@property (readwrite, getter=isFinished) BOOL finished;
@end

@implementation NiceURLConnection

- (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate startImmediately:(BOOL)startImmediately
{
    if (self = [super initWithRequest:request delegate:self startImmediately:startImmediately]) {
        delegate = delegate;
    }
    return self;
}

- (void)dealloc
{
    [data release]; data = nil;
    [response release]; response = nil;
    [error release]; error = nil;
    
    [super dealloc];
}

@synthesize data;
@synthesize response;
@synthesize error;
@synthesize finished;

#pragma mark -
#pragma mark Delegate

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)inResponse
{
    [data release];
    data = [[NSMutableData alloc] init];
    
    [response release];
    response = [inResponse retain];
    
    if (delegate && [delegate respondsToSelector:@selector(connection:didReceiveResponse:)]) {
        [delegate connection:connection didReceiveResponse:inResponse];
    }
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)inData
{
    [data appendData:inData];
    
    if (delegate && [delegate respondsToSelector:@selector(connection:didReceiveData:)]) {
        [delegate connection:connection didReceiveData:inData];
    }
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    [self setFinished:YES];
    
    if (delegate && [delegate respondsToSelector:@selector(connectionDidFinishLoading:)]) {
        [delegate connectionDidFinishLoading:connection];
    }
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)inError
{
    [self setFinished:YES];
    error = [inError copy];

    if (delegate && [delegate respondsToSelector:@selector(connection:didFailWithError:)]) {
        [delegate connection:connection didFailWithError:inError];
    }
}

// XXX forward all remaining delegate methods with forwardInvocation or just paste them in.

@end