You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
262 lines
11 KiB
262 lines
11 KiB
// Request.java
|
|
// (C) 2007 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
|
|
// first published 14.03.2007 on http://yacy.net
|
|
//
|
|
// This is a part of YaCy, a peer-to-peer based web search engine
|
|
//
|
|
// $LastChangedDate$
|
|
// $LastChangedRevision$
|
|
// $LastChangedBy$
|
|
//
|
|
// LICENSE
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 2 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
package de.anomic.crawler.retrieval;
|
|
|
|
import java.io.IOException;
|
|
import java.util.Date;
|
|
|
|
import net.yacy.cora.document.UTF8;
|
|
import net.yacy.kelondro.data.meta.DigestURI;
|
|
import net.yacy.kelondro.data.word.Word;
|
|
import net.yacy.kelondro.index.Row;
|
|
import net.yacy.kelondro.order.Base64Order;
|
|
import net.yacy.kelondro.order.Bitfield;
|
|
import net.yacy.kelondro.order.NaturalOrder;
|
|
import net.yacy.kelondro.workflow.WorkflowJob;
|
|
|
|
public class Request extends WorkflowJob {
|
|
|
|
// row definition for balancer-related NURL-entries
|
|
public final static Row rowdef = new Row(
|
|
"String urlhash-" + Word.commonHashLength + ", " + // the url's hash
|
|
"String initiator-" + Word.commonHashLength + ", " + // the crawling initiator
|
|
"String urlstring-256, " + // the url as string
|
|
"String refhash-" + Word.commonHashLength + ", " + // the url's referrer hash
|
|
"String urlname-80, " + // the name of the url, from anchor tag <a>name</a>
|
|
"Cardinal appdate-8 {b256}, " + // the date of the resource; either file date or first appearance
|
|
"String profile-" + Word.commonHashLength + ", " + // the name of the prefetch profile handle
|
|
"Cardinal depth-2 {b256}, " + // the prefetch depth so far, starts at 0
|
|
"Cardinal parentbr-3 {b256}, " + // number of anchors of the parent
|
|
"Cardinal forkfactor-4 {b256}, " + // sum of anchors of all ancestors
|
|
"byte[] flags-4, " + // flags
|
|
"Cardinal handle-4 {b256}, " + // handle (NOT USED)
|
|
"Cardinal loaddate-8 {b256}, " + // NOT USED
|
|
"Cardinal lastmodified-8 {b256}, " + // NOT USED
|
|
"Cardinal size-8 {b256}", // size of resource in bytes (if known) or 0 if not known
|
|
Base64Order.enhancedCoder
|
|
);
|
|
|
|
private byte[] initiator; // the initiator hash, is NULL or "" if it is the own proxy;
|
|
// if this is generated by a crawl, the own peer hash in entered
|
|
private byte[] refhash; // the url's referrer hash
|
|
private DigestURI url; // the url as string
|
|
private String name; // the name of the url, from anchor tag <a>name</a>
|
|
private long appdate; // the time when the url was first time appeared.
|
|
private String profileHandle; // the name of the fetch profile
|
|
private int depth; // the prefetch depth so far, starts at 0
|
|
private int anchors; // number of anchors of the parent
|
|
private int forkfactor; // sum of anchors of all ancestors
|
|
private Bitfield flags;
|
|
private long size; // size of resource in bytes (if known) or 0 if not known
|
|
private String statusMessage;
|
|
private int initialHash; // to provide a object hash that does not change even if the url changes because of redirection
|
|
|
|
/**
|
|
* convenience method for 'full' request object
|
|
* @param url
|
|
* @param referrerhash
|
|
*/
|
|
public Request(final DigestURI url, final byte[] referrerhash) {
|
|
this(null, url, referrerhash, null, null, null, 0, 0, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* A Request Entry is a object that is created to provide
|
|
* all information to load a specific resource.
|
|
*
|
|
* @param initiator the hash of the initiator peer
|
|
* @param url the {@link URL} to crawl
|
|
* @param referrer the hash of the referrer URL
|
|
* @param name the name of the document to crawl
|
|
* @param appdate the time when the url was first time appeared
|
|
* @param profileHandle the name of the prefetch profile. This must not be null!
|
|
* @param depth the crawling depth of the entry
|
|
* @param anchors number of anchors of the parent
|
|
* @param forkfactor sum of anchors of all ancestors
|
|
*/
|
|
public Request(
|
|
final byte[] initiator,
|
|
final DigestURI url,
|
|
final byte[] referrerhash,
|
|
final String name,
|
|
final Date appdate,
|
|
final String profileHandle,
|
|
final int depth,
|
|
final int anchors,
|
|
final int forkfactor,
|
|
final long size
|
|
) {
|
|
// create new entry and store it into database
|
|
assert url != null;
|
|
assert profileHandle == null || profileHandle.length() == Word.commonHashLength : profileHandle + " != " + Word.commonHashLength;
|
|
url.removeRef(); // remove anchor reference
|
|
this.initiator = (initiator == null) ? null : ((initiator.length == 0) ? null : initiator);
|
|
this.url = url;
|
|
this.refhash = referrerhash;
|
|
this.name = (name == null) ? "" : name;
|
|
this.appdate = (appdate == null) ? 0 : appdate.getTime();
|
|
this.profileHandle = profileHandle; // must not be null
|
|
this.depth = depth;
|
|
this.anchors = anchors;
|
|
this.forkfactor = forkfactor;
|
|
this.flags = new Bitfield(rowdef.width(10));
|
|
this.statusMessage = "loaded(args)";
|
|
this.initialHash = url.hashCode();
|
|
this.status = WorkflowJob.STATUS_INITIATED;
|
|
this.size = size;
|
|
}
|
|
|
|
public Request(final Row.Entry entry) throws IOException {
|
|
assert (entry != null);
|
|
insertEntry(entry);
|
|
}
|
|
|
|
private void insertEntry(final Row.Entry entry) throws IOException {
|
|
final String urlstring = entry.getColUTF8(2);
|
|
if (urlstring == null) throw new IOException ("url string is null");
|
|
this.initiator = entry.getColBytes(1, true);
|
|
this.initiator = (this.initiator == null) ? null : ((this.initiator.length == 0) ? null : this.initiator);
|
|
this.url = new DigestURI(urlstring, entry.getPrimaryKeyBytes());
|
|
this.refhash = (entry.empty(3)) ? null : entry.getColBytes(3, true);
|
|
this.name = (entry.empty(4)) ? "" : entry.getColUTF8(4).trim();
|
|
this.appdate = entry.getColLong(5);
|
|
this.profileHandle = (entry.empty(6)) ? null : entry.getColASCII(6).trim();
|
|
this.depth = (int) entry.getColLong(7);
|
|
this.anchors = (int) entry.getColLong(8);
|
|
this.forkfactor = (int) entry.getColLong(9);
|
|
this.flags = new Bitfield(entry.getColBytes(10, true));
|
|
//this.loaddate = entry.getColLong(12);
|
|
//this.lastmodified = entry.getColLong(13);
|
|
this.size = entry.getColLong(14);
|
|
this.statusMessage = "loaded(kelondroRow.Entry)";
|
|
this.initialHash = this.url.hashCode();
|
|
return;
|
|
}
|
|
|
|
public int hashCode() {
|
|
// overloads Object.hashCode()
|
|
return this.initialHash;
|
|
}
|
|
|
|
public void setStatus(final String s, final int code) {
|
|
//System.out.println("***DEBUG*** crawler status " + s + ", " + code + " for " + this.url.toNormalform(true, false));
|
|
this.statusMessage = s;
|
|
this.status = code;
|
|
}
|
|
|
|
public String getStatus() {
|
|
return this.statusMessage;
|
|
}
|
|
|
|
public Row.Entry toRow() {
|
|
final byte[] appdatestr = NaturalOrder.encodeLong(this.appdate, rowdef.width(5));
|
|
final byte[] loaddatestr = NaturalOrder.encodeLong(0 /*loaddate*/, rowdef.width(12));
|
|
final byte[] serverdatestr = NaturalOrder.encodeLong(0 /*lastmodified*/, rowdef.width(13));
|
|
final byte[] sizestr = NaturalOrder.encodeLong(this.size, rowdef.width(14));
|
|
// store the hash in the hash cache
|
|
final byte[] namebytes = UTF8.getBytes(this.name);
|
|
final byte[][] entry = new byte[][] {
|
|
this.url.hash(),
|
|
this.initiator,
|
|
this.url.toString().getBytes(),
|
|
this.refhash,
|
|
namebytes,
|
|
appdatestr,
|
|
(this.profileHandle == null) ? null : this.profileHandle.getBytes(),
|
|
NaturalOrder.encodeLong(this.depth, rowdef.width(7)),
|
|
NaturalOrder.encodeLong(this.anchors, rowdef.width(8)),
|
|
NaturalOrder.encodeLong(this.forkfactor, rowdef.width(9)),
|
|
this.flags.bytes(),
|
|
NaturalOrder.encodeLong(0, rowdef.width(11)),
|
|
loaddatestr,
|
|
serverdatestr,
|
|
sizestr};
|
|
return rowdef.newEntry(entry);
|
|
}
|
|
|
|
public DigestURI url() {
|
|
// the url
|
|
return this.url;
|
|
}
|
|
|
|
public void redirectURL(final DigestURI redirectedURL) {
|
|
// replace old URL by new one. This should only be used in case of url redirection
|
|
this.url = redirectedURL;
|
|
}
|
|
|
|
public byte[] referrerhash() {
|
|
// the urlhash of a referer url
|
|
return this.refhash;
|
|
}
|
|
|
|
public byte[] initiator() {
|
|
// returns the hash of the initiating peer
|
|
return this.initiator;
|
|
}
|
|
|
|
public boolean proxy() {
|
|
// true when the url was retrieved using the proxy
|
|
return (initiator() == null || initiator().length == 0);
|
|
}
|
|
|
|
public Date appdate() {
|
|
// the date when the url appeared first
|
|
return new Date(this.appdate);
|
|
}
|
|
/*
|
|
public Date loaddate() {
|
|
// the date when the url was loaded
|
|
return new Date(this.loaddate);
|
|
}
|
|
|
|
public Date lastmodified() {
|
|
// the date that the server returned as document date
|
|
return new Date(this.lastmodified);
|
|
}
|
|
*/
|
|
public long size() {
|
|
// the date that the client (browser) send as ifModifiedSince in proxy mode
|
|
return this.size;
|
|
}
|
|
|
|
public String name() {
|
|
// return the anchor name (text inside <a> tag)
|
|
return this.name;
|
|
}
|
|
|
|
public int depth() {
|
|
// crawl depth where the url appeared
|
|
return this.depth;
|
|
}
|
|
|
|
public String profileHandle() {
|
|
// the handle of the crawl profile
|
|
assert this.profileHandle.length() == Word.commonHashLength : this.profileHandle + " != " + Word.commonHashLength;
|
|
return this.profileHandle;
|
|
}
|
|
|
|
} |