//
//  WindHCDataSource.h
//  WindHTTPCache
//
//  Created by Single on 2017/8/11.
//  Copyright © 2017年 Single. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "WindHCRange.h"

@protocol WindHCDataSource <NSObject>

@property (nonatomic, copy, readonly) NSError *error;

@property (nonatomic, readonly, getter=isPrepared) BOOL prepared;
@property (nonatomic, readonly, getter=isFinished) BOOL finished;
@property (nonatomic, readonly, getter=isClosed) BOOL closed;

@property (nonatomic, readonly) WindHCRange range;
@property (nonatomic, readonly) long long readedLength;

- (void)prepare;
- (void)close;

- (NSData *)readDataOfLength:(NSUInteger)length;

@end