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# NSURLRequest.CachePolicy

The constants used to specify interaction with the cached responses.

```
enum CachePolicy
```

## Overview

The default policy is [`NSURLRequest.CachePolicy.useProtocolCachePolicy`](/documentation/Foundation/NSURLRequest/CachePolicy-swift.enum/useProtocolCachePolicy).

## Topics

### Policies

[`NSURLRequest.CachePolicy.useProtocolCachePolicy`](/documentation/Foundation/NSURLRequest/CachePolicy-swift.enum/useProtocolCachePolicy)

Use the caching logic defined in the protocol implementation, if any, for a particular URL load request.

[`NSURLRequest.CachePolicy.reloadIgnoringLocalCacheData`](/documentation/Foundation/NSURLRequest/CachePolicy-swift.enum/reloadIgnoringLocalCacheData)

The URL load should be loaded only from the originating source.

[`NSURLRequest.CachePolicy.reloadIgnoringLocalAndRemoteCacheData`](/documentation/Foundation/NSURLRequest/CachePolicy-swift.enum/reloadIgnoringLocalAndRemoteCacheData)

Ignore local cache data, and instruct proxies and other intermediates to disregard their caches so far as the protocol allows.

[`reloadIgnoringCacheData`](/documentation/Foundation/NSURLRequest/CachePolicy-swift.enum/reloadIgnoringCacheData)

Replaced by [`NSURLRequest.CachePolicy.reloadIgnoringLocalCacheData`](/documentation/Foundation/NSURLRequest/CachePolicy-swift.enum/reloadIgnoringLocalCacheData).

[`NSURLRequest.CachePolicy.returnCacheDataElseLoad`](/documentation/Foundation/NSURLRequest/CachePolicy-swift.enum/returnCacheDataElseLoad)

Use existing cache data, regardless or age or expiration date, loading from originating source only if there is no cached data.

[`NSURLRequest.CachePolicy.returnCacheDataDontLoad`](/documentation/Foundation/NSURLRequest/CachePolicy-swift.enum/returnCacheDataDontLoad)

Use existing cache data, regardless or age or expiration date, and fail if no cached data is available.

[`NSURLRequest.CachePolicy.reloadRevalidatingCacheData`](/documentation/Foundation/NSURLRequest/CachePolicy-swift.enum/reloadRevalidatingCacheData)

Use cache data if the origin source can validate it; otherwise, load from the origin.


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