URLHelper (htsjdk 2.24.1 API)

All Known Implementing Classes:

FTPHelper, HTTPHelper, RemoteURLHelper
```
public interface URLHelper
```
Interface defining a helper class for dealing with URL resources. The purpose of this class is to provide the flexibility to use alternative http implementations, for example Apache HTTPClient, and secondly to provide a hook for clients to inject custom headers, for example oAuth tokens, into the requests. An instance of URLHelper is created for a URL (there is a 1-1 relation between a URL and HRLHelper).

See Also:

HTTPHelper, FTPHelper

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`exists()`
`long`	`getContentLength()`
`URL`	`getUrl()`
`InputStream`	`openInputStream()`	Open an InputStream to stream the contents of the resource
`InputStream`	`openInputStreamForRange(long start, long end)`	Open an InputStream to stream a slice (range) of the resource.

- Method Detail
  - getUrl
```
URL getUrl()
```
    Returns:
    
    URL of the associated resource
  - getContentLength
```
long getContentLength()
               throws IOException
```
    Returns:
    
    content length of the resource, or -1 if not available
    
    Throws:
    
    IOException
  - openInputStream
```
InputStream openInputStream()
                     throws IOException
```
    Open an InputStream to stream the contents of the resource
    
    Returns:
    
    Throws:
    
    IOException
  - openInputStreamForRange
```
InputStream openInputStreamForRange(long start,
                                    long end)
                             throws IOException
```
    Open an InputStream to stream a slice (range) of the resource. May throw an OperationUnsupportedException
    
    Parameters:
    
    start -
    
    end -
    
    Returns:
    
    Throws:
    
    IOException
  - exists
```
boolean exists()
        throws IOException
```
    Throws:
    
    IOException