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# availableData

The data currently available in the receiver.

```
var availableData: Data { get }
```

## Discussion

The data currently available through the receiver, up to the maximum size that can be represented by an [`NSData`](/documentation/Foundation/NSData) object.

If the receiver is a file, this method returns the data obtained by reading the file from the current file pointer to the end of the file. If the receiver is a communications channel, this method reads up to a buffer of data and returns it; if no data is available, the method blocks. Returns an empty data object if the end of file is reached. This method raises `NSFileHandleOperationException` if attempts to determine the file-handle type fail or if attempts to read from the file or channel fail.

## See Also

[`-  readDataOfLength:`](/documentation/Foundation/FileHandle/readData(ofLength:))

Reads data synchronously up to the specified number of bytes.

[`-  readDataToEndOfFile`](/documentation/Foundation/FileHandle/readDataToEndOfFile())

Reads the available data synchronously up to the end of file or maximum number of bytes.


---

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