akkabin

#import <Foundation/Foundation.h>

@class AsyncURLWrapper;

@protocol AsyncURLWrapperDelegate <NSObject>
@optional
- (void) didFinish: (NSData*) data sender: (AsyncURLWrapper*) urlWrapper response: (NSHTTPURLResponse*) response;
- (void) didFail: (NSError*) error sender: (AsyncURLWrapper*) urlWrapper;
- (void) beforeRetry: (NSError*) error sender: (AsyncURLWrapper*) urlWrapper;
- (void) didUpdateProgress: (float) percentCompleted sender: (AsyncURLWrapper*) urlWrapper;

akkabin

implicit def ClosableLoan[C <: { def close(): Unit }] = new Loan[C] {

  override def using[A](closable: C)(block: C => A) = try {
    block(closable)
  } finally { closable.close }
}