org.apache.nutch.protocol.file
Class File

java.lang.Object
  org.apache.nutch.protocol.file.File

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, FieldPluggable, Pluggable, Protocol

public class File
extends Object
implements Protocol

This class is a protocol plugin used for file: scheme. It creates FileResponse object and gets the content of the url from it. Configurable parameters are file.content.limit and file.crawl.parent in nutch-default.xml defined under "file properties" section.

Field Summary

static org.slf4j.Logger

LOG

Fields inherited from interface org.apache.nutch.protocol.Protocol

CHECK_BLOCKING, CHECK_ROBOTS, X_POINT_ID

Constructor Summary

File()

Method Summary

org.apache.hadoop.conf.Configuration	getConf() Get the Configuration object
Collection<WebPage.Field>	getFields()
ProtocolOutput	getProtocolOutput(String url, WebPage page) Creates a FileResponse object corresponding to the url and return a ProtocolOutput object as per the content received
crawlercommons.robots.BaseRobotRules	getRobotRules(String url, WebPage page) No robots parsing is done for file protocol.
static void	main(String[] args) Quick way for running this class.
void	setConf(org.apache.hadoop.conf.Configuration conf) Set the Configuration object
void	setMaxContentLength(int maxContentLength) Set the point at which content is truncated.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

File

public File()

Method Detail

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)

Set the Configuration object

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

getConf

public org.apache.hadoop.conf.Configuration getConf()

Get the Configuration object

Specified by:

getConf in interface org.apache.hadoop.conf.Configurable

setMaxContentLength

public void setMaxContentLength(int maxContentLength)

Set the point at which content is truncated.

getProtocolOutput

public ProtocolOutput getProtocolOutput(String url,
                                        WebPage page)

Creates a FileResponse object corresponding to the url and return a ProtocolOutput object as per the content received

Specified by:

getProtocolOutput in interface Protocol

Parameters:

url - Text containing the url

datum - The CrawlDatum object corresponding to the url

Returns:

ProtocolOutput object for the content of the file indicated by url

getFields

public Collection<WebPage.Field> getFields()

Specified by:

getFields in interface FieldPluggable

main

public static void main(String[] args)
                 throws Exception

Quick way for running this class. Useful for debugging.

Throws:

Exception

getRobotRules

public crawlercommons.robots.BaseRobotRules getRobotRules(String url,
                                                          WebPage page)

No robots parsing is done for file protocol. So this returns a set of empty rules which will allow every url.

Specified by:

getRobotRules in interface Protocol

Parameters:

url - url to check

Returns:

robot rules (specific for this url or default), never null