FileResponse (apache-nutch 1.20 API)

java.lang.Object
- org.apache.nutch.protocol.file.FileResponse

```
public class FileResponse
extends Object
```
FileResponse.java mimics file replies as http response. It tries its best to follow http's way for headers, response codes as well as exceptions. Comments: (1) java.net.URL and java.net.URLConnection can handle file: scheme. However they are not flexible enough, so not used in this implementation. (2) java.io.File is used for its abstractness across platforms. Warning: java.io.File API (1.4.2) does not elaborate on how special files, such as /dev/* in unix and /proc/* on linux, are treated. Tests show (a) java.io.File.isFile() return false for /dev/* (b) java.io.File.isFile() return true for /proc/* (c) java.io.File.length() return 0 for /proc/* We are probably oaky for now. Could be buggy here. How about special files on windows? (3) java.io.File API (1.4.2) does not seem to know unix hard link files. They are just treated as individual files. (4) No funcy POSIX file attributes yet. May never need?

Author:

John Xing

Constructor Summary

Constructors
Constructor Description

FileResponse(URL url, CrawlDatum datum, File file, Configuration conf)
Default public constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`getCode()`	Get the response code.
`byte[]`	`getContent()`
`String`	`getHeader(String name)`	Returns the value of a named header.
`Content`	`toContent()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FileResponse
```
public FileResponse(URL url,
                    CrawlDatum datum,
                    File file,
                    Configuration conf)
             throws FileException,
                    IOException
```
    Default public constructor
    
    Parameters:
    
    url - the canonical URL associated with the response
    
    datum - crawl information for the URL
    
    file - the actual File containing content for the url
    
    conf - a populated Configuration
    
    Throws:
    
    FileException - if the input file does not use file protocol
    
    IOException - if there is a fatal I/O error obtaining the input file
- Method Detail
  - getCode
```
public int getCode()
```
    Get the response code.
    
    Returns:
    
    the int response code
  - getHeader
```
public String getHeader(String name)
```
    Returns the value of a named header.
    
    Parameters:
    
    name - header key to retrieve a value for
    
    Returns:
    
    the header value
  - getContent
```
public byte[] getContent()
```
  - toContent
```
public Content toContent()
```