org.apache.nutch.protocol.httpclient

Class Http

java.lang.Object

org.apache.nutch.protocol.http.api.HttpBase

org.apache.nutch.protocol.httpclient.Http

All Implemented Interfaces:

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

public class Http
extends HttpBase

This class is a protocol plugin that configures an HTTP client for Basic, Digest and NTLM authentication schemes for web server as well as proxy server. It takes care of HTTPS protocol as well as cookies in a single fetch session.

Author:

Susam Pal

Field Summary

Fields

Modifier and Type	Field and Description
static org.slf4j.Logger	LOG

Fields inherited from class org.apache.nutch.protocol.http.api.HttpBase

accept, acceptLanguage, BUFFER_SIZE, maxContent, maxCrawlDelay, proxyHost, proxyPort, RESPONSE_TIME, responseTime, timeout, useHttp11, useProxy, userAgent

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

CHECK_BLOCKING, CHECK_ROBOTS, X_POINT_ID

Constructor Summary

Constructors

Constructor and Description
Http() Constructs this plugin.

Method Summary

Methods

Modifier and Type	Method and Description
protected Response	getResponse(URL url, CrawlDatum datum, boolean redirect) Fetches the url with a configured HTTP client and gets the response.
static void	main(String[] args) Main method.
void	setConf(org.apache.hadoop.conf.Configuration conf) Reads the configuration from the Nutch configuration files and sets the configuration.

Methods inherited from class org.apache.nutch.protocol.http.api.HttpBase

getAccept, getAcceptLanguage, getConf, getMaxContent, getProtocolOutput, getProxyHost, getProxyPort, getRobotRules, getTimeout, getUseHttp11, getUserAgent, logConf, main, processDeflateEncoded, processGzipEncoded, useProxy

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

Http

public Http()

Constructs this plugin.

Method Detail

setConf

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

Reads the configuration from the Nutch configuration files and sets the configuration.

Specified by:

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

Overrides:

setConf in class HttpBase

Parameters:

conf - Configuration

main

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

Main method.

Parameters:

args - Command line arguments

Throws:

Exception

getResponse

protected Response getResponse(URL url,
                   CrawlDatum datum,
                   boolean redirect)
                        throws ProtocolException,
                               IOException

Fetches the url with a configured HTTP client and gets the response.

Specified by:

getResponse in class HttpBase

Parameters:

url - URL to be fetched

datum - Crawl data

redirect - Follow redirects if and only if true

Returns:

HTTP response

Throws:

ProtocolException

IOException