Package org.apache.nutch.protocol.file

Class FileResponse

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?

Constructor Summary

Constructors

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

Method Summary

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 Details

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 Details

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()