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.
427 lines
18 KiB
427 lines
18 KiB
// plasmaSwitchboardQueueEntry.java
|
|
// --------------------------------
|
|
// part of YaCy
|
|
// (C) by Michael Peter Christen; mc@anomic.de
|
|
// first published on http://www.anomic.de
|
|
// Frankfurt, Germany, 2005
|
|
// last major change: 04.07.2005
|
|
//
|
|
// 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
|
|
//
|
|
// Using this software in any meaning (reading, learning, copying, compiling,
|
|
// running) means that you agree that the Author(s) is (are) not responsible
|
|
// for cost, loss of data or any harm that may be caused directly or indirectly
|
|
// by usage of this softare or this documentation. The usage of this software
|
|
// is on your own risk. The installation and usage (starting/running) of this
|
|
// software may allow other people or application to access your computer and
|
|
// any attached devices and is highly dependent on the configuration of the
|
|
// software which must be done by the user of the software; the author(s) is
|
|
// (are) also not responsible for proper configuration and usage of the
|
|
// software, even if provoked by documentation provided together with
|
|
// the software.
|
|
//
|
|
// Any changes to this file according to the GPL as documented in the file
|
|
// gpl.txt aside this file in the shipment you received can be done to the
|
|
// lines that follows this copyright notice here, but changes must not be
|
|
// done inside the copyright notive above. A re-distribution must contain
|
|
// the intact and unchanged copyright notice.
|
|
// Contributions and changes to the program code must be marked as such.
|
|
|
|
package de.anomic.plasma;
|
|
|
|
import java.io.File;
|
|
import java.io.IOException;
|
|
import java.net.MalformedURLException;
|
|
import java.net.URL;
|
|
import java.util.Date;
|
|
|
|
import de.anomic.htmlFilter.htmlFilterContentScraper;
|
|
import de.anomic.http.httpHeader;
|
|
import de.anomic.kelondro.kelondroStack;
|
|
import de.anomic.server.serverCodings;
|
|
import de.anomic.yacy.yacySeedDB;
|
|
|
|
public class plasmaSwitchboardQueue {
|
|
|
|
private kelondroStack sbQueueStack;
|
|
private plasmaCrawlProfile profiles;
|
|
private plasmaHTCache htCache;
|
|
private plasmaCrawlLURL lurls;
|
|
|
|
public plasmaSwitchboardQueue(plasmaHTCache htCache, plasmaCrawlLURL lurls, File sbQueueStackPath, int bufferkb, plasmaCrawlProfile profiles) throws IOException {
|
|
this.profiles = profiles;
|
|
this.htCache = htCache;
|
|
this.lurls = lurls;
|
|
|
|
if (sbQueueStackPath.exists())
|
|
sbQueueStack = new kelondroStack(sbQueueStackPath, 0);
|
|
else
|
|
sbQueueStack = new kelondroStack(sbQueueStackPath, 0, new int[] {
|
|
plasmaURL.urlStringLength,
|
|
plasmaURL.urlHashLength,
|
|
11,
|
|
1,
|
|
yacySeedDB.commonHashLength,
|
|
plasmaURL.urlCrawlDepthLength,
|
|
plasmaURL.urlCrawlProfileHandleLength,
|
|
plasmaURL.urlDescrLength
|
|
});
|
|
|
|
}
|
|
|
|
public int size() {
|
|
return sbQueueStack.size();
|
|
}
|
|
|
|
public void push(Entry entry) throws IOException {
|
|
sbQueueStack.push(new byte[][]{
|
|
entry.url.toString().getBytes(),
|
|
(entry.referrerHash == null) ? plasmaURL.dummyHash.getBytes() : entry.referrerHash.getBytes(),
|
|
serverCodings.enhancedCoder.encodeBase64Long((entry.ifModifiedSince == null) ? 0 : entry.ifModifiedSince.getTime(), 11).getBytes(),
|
|
new byte[entry.flags],
|
|
(entry.initiator == null) ? plasmaURL.dummyHash.getBytes() : entry.initiator.getBytes(),
|
|
serverCodings.enhancedCoder.encodeBase64Long((long) entry.depth, plasmaURL.urlCrawlDepthLength).getBytes(),
|
|
(entry.profileHandle == null) ? plasmaURL.dummyHash.getBytes() : entry.profileHandle.getBytes(),
|
|
(entry.anchorName == null) ? "-".getBytes() : entry.anchorName.getBytes()
|
|
});
|
|
}
|
|
|
|
public Entry pop() throws IOException {
|
|
if (sbQueueStack.size() == 0) return null;
|
|
return new Entry(sbQueueStack.pot());
|
|
}
|
|
|
|
public Entry get(int index) throws IOException {
|
|
if ((index < 0) || (index >= sbQueueStack.size())) throw new ArrayIndexOutOfBoundsException();
|
|
return new Entry(sbQueueStack.bot(index));
|
|
}
|
|
|
|
public void close() {
|
|
if (sbQueueStack != null) try {
|
|
sbQueueStack.close();
|
|
} catch (IOException e) {
|
|
|
|
}
|
|
sbQueueStack = null;
|
|
}
|
|
|
|
public void finalize() {
|
|
close();
|
|
}
|
|
|
|
public Entry newEntry(URL url, String referrer, Date ifModifiedSince, boolean requestWithCookie,
|
|
String initiator, int depth, String profilehandle, String anchorName) {
|
|
return new Entry(url, referrer, ifModifiedSince, requestWithCookie, initiator, depth, profilehandle, anchorName);
|
|
}
|
|
|
|
public class Entry {
|
|
private URL url; // plasmaURL.urlStringLength
|
|
private String referrerHash; // plasmaURL.urlHashLength
|
|
private Date ifModifiedSince; // 6
|
|
private byte flags; // 1
|
|
private String initiator; // yacySeedDB.commonHashLength
|
|
private int depth; // plasmaURL.urlCrawlDepthLength
|
|
private String profileHandle; // plasmaURL.urlCrawlProfileHandleLength
|
|
private String anchorName; // plasmaURL.urlDescrLength
|
|
|
|
// computed values
|
|
private plasmaCrawlProfile.entry profileEntry;
|
|
private httpHeader responseHeader;
|
|
private URL referrerURL;
|
|
|
|
public Entry(URL url, String referrer, Date ifModifiedSince, boolean requestWithCookie,
|
|
String initiator, int depth, String profileHandle, String anchorName) {
|
|
this.url = url;
|
|
this.referrerHash = referrer;
|
|
this.ifModifiedSince = ifModifiedSince;
|
|
this.flags = (requestWithCookie) ? (byte) 1 : (byte) 0;
|
|
this.initiator = initiator;
|
|
this.depth = depth;
|
|
this.profileHandle = profileHandle;
|
|
this.anchorName = anchorName;
|
|
|
|
this.profileEntry = null;
|
|
this.responseHeader = null;
|
|
this.referrerURL = null;
|
|
}
|
|
|
|
public Entry(byte[][] row) {
|
|
long ims = serverCodings.enhancedCoder.decodeBase64Long(new String(row[2]));
|
|
byte flags = row[3][0];
|
|
try {
|
|
this.url = new URL(new String(row[0]));
|
|
} catch (MalformedURLException e) {
|
|
this.url = null;
|
|
}
|
|
this.referrerHash = new String(row[1]);
|
|
this.ifModifiedSince = (ims == 0) ? null : new Date(ims);
|
|
this.flags = ((flags & 1) == 1) ? (byte) 1 : (byte) 0;
|
|
this.initiator = new String(row[4]);
|
|
this.depth = (int) serverCodings.enhancedCoder.decodeBase64Long(new String(row[5]));
|
|
this.profileHandle = new String(row[6]);
|
|
this.anchorName = new String(row[7]);
|
|
|
|
this.profileEntry = null;
|
|
this.responseHeader = null;
|
|
this.referrerURL = null;
|
|
}
|
|
|
|
public URL url() {
|
|
return url;
|
|
}
|
|
|
|
public String normalizedURLString() {
|
|
return htmlFilterContentScraper.urlNormalform(url);
|
|
}
|
|
|
|
public String urlHash() {
|
|
return plasmaURL.urlHash(url);
|
|
}
|
|
|
|
public boolean requestedWithCookie() {
|
|
return (flags & 1) == 1;
|
|
}
|
|
|
|
public File cacheFile() {
|
|
return htCache.getCachePath(url);
|
|
}
|
|
|
|
public boolean proxy() {
|
|
return (initiator == null) || (initiator.equals(plasmaURL.dummyHash));
|
|
}
|
|
|
|
public String initiator() {
|
|
return initiator;
|
|
}
|
|
|
|
public int depth() {
|
|
return depth;
|
|
}
|
|
|
|
public long size() {
|
|
if (cacheFile().exists()) return cacheFile().length(); else return 0;
|
|
}
|
|
|
|
public plasmaCrawlProfile.entry profile() {
|
|
if (profileEntry == null) profileEntry = profiles.getEntry(profileHandle);
|
|
return profileEntry;
|
|
}
|
|
|
|
public httpHeader responseHeader() {
|
|
if (responseHeader == null) try {
|
|
responseHeader = htCache.getCachedResponse(plasmaURL.urlHash(url));
|
|
} catch (IOException e) {
|
|
e.printStackTrace();
|
|
return null;
|
|
}
|
|
return responseHeader;
|
|
}
|
|
|
|
public URL referrerURL() {
|
|
if (referrerURL == null) {
|
|
if ((referrerHash == null) || (referrerHash.equals(plasmaURL.dummyHash))) return null;
|
|
referrerURL = lurls.getEntry(referrerHash).url();
|
|
}
|
|
return referrerURL;
|
|
}
|
|
|
|
public String anchorName() {
|
|
return anchorName;
|
|
}
|
|
|
|
public String shallIndexCacheForProxy() {
|
|
// decide upon header information if a specific file should be indexed
|
|
// this method returns null if the answer is 'YES'!
|
|
// if the answer is 'NO' (do not index), it returns a string with the reason
|
|
// to reject the crawling demand in clear text
|
|
|
|
// check profile
|
|
if (!(profile().localIndexing())) return "Indexing_Not_Allowed";
|
|
|
|
// -CGI access in request
|
|
// CGI access makes the page very individual, and therefore not usable in caches
|
|
if ((plasmaHTCache.isPOST(normalizedURLString())) && (!(profile().crawlingQ()))) return "Dynamic_(POST)";
|
|
if ((plasmaHTCache.isCGI(normalizedURLString())) && (!(profile().crawlingQ()))) return "Dynamic_(CGI)";
|
|
|
|
// -authorization cases in request
|
|
// we checked that in shallStoreCache
|
|
|
|
// -ranges in request
|
|
// we checked that in shallStoreCache
|
|
|
|
// a picture cannot be indexed
|
|
if (plasmaHTCache.noIndexingURL(normalizedURLString())) return "Media_Content_(forbidden)";
|
|
|
|
// -cookies in request
|
|
// unfortunately, we cannot index pages which have been requested with a cookie
|
|
// because the returned content may be special for the client
|
|
if (requestedWithCookie()) {
|
|
//System.out.println("***not indexed because cookie");
|
|
return "Dynamic_(Requested_With_Cookie)";
|
|
}
|
|
|
|
// -set-cookie in response
|
|
// the set-cookie from the server does not indicate that the content is special
|
|
// thus we do not care about it here for indexing
|
|
|
|
if (responseHeader() != null) {
|
|
|
|
// a picture cannot be indexed
|
|
if (plasmaHTCache.isPicture(responseHeader())) return "Media_Content_(Picture)";
|
|
if (!(plasmaHTCache.isText(responseHeader()))) return "Media_Content_(not_text)";
|
|
|
|
// -if-modified-since in request
|
|
// if the page is fresh at the very moment we can index it
|
|
if ((ifModifiedSince != null) && (responseHeader().containsKey(httpHeader.LAST_MODIFIED))) {
|
|
// parse date
|
|
Date d = responseHeader().lastModified();
|
|
if (d == null) d = new Date();
|
|
// finally, we shall treat the cache as stale if the modification time is after the if-.. time
|
|
if (d.after(ifModifiedSince)) {
|
|
//System.out.println("***not indexed because if-modified-since");
|
|
return "Stale_(Last-Modified>Modified-Since)";
|
|
}
|
|
}
|
|
|
|
// -pragma in cached response
|
|
if ((responseHeader().containsKey(httpHeader.PRAGMA)) &&
|
|
(((String) responseHeader().get(httpHeader.PRAGMA)).toUpperCase().equals("NO-CACHE"))) return "Denied_(pragma_no_cache)";
|
|
|
|
// see for documentation also:
|
|
// http://www.web-caching.com/cacheability.html
|
|
|
|
|
|
// calculate often needed values for freshness attributes
|
|
Date date = responseHeader().date();
|
|
Date expires = responseHeader().expires();
|
|
Date lastModified = responseHeader().lastModified();
|
|
String cacheControl = (String) responseHeader.get(httpHeader.CACHE_CONTROL);
|
|
|
|
// look for freshnes information
|
|
|
|
// -expires in cached response
|
|
// the expires value gives us a very easy hint when the cache is stale
|
|
// sometimes, the expires date is set to the past to prevent that a page is cached
|
|
// we use that information to see if we should index it
|
|
if (expires != null) {
|
|
Date yesterday = new Date((new Date()).getTime() - plasmaHTCache.oneday);
|
|
if (expires.before(yesterday)) return "Stale_(Expired)";
|
|
}
|
|
|
|
// -lastModified in cached response
|
|
// this information is too weak to use it to prevent indexing
|
|
// even if we can apply a TTL heuristic for cache usage
|
|
|
|
// -cache-control in cached response
|
|
// the cache-control has many value options.
|
|
if (cacheControl != null) {
|
|
cacheControl = cacheControl.trim().toUpperCase();
|
|
/* we have the following cases for cache-control:
|
|
"public" -- can be indexed
|
|
"private", "no-cache", "no-store" -- cannot be indexed
|
|
"max-age=<delta-seconds>" -- stale/fresh dependent on date
|
|
*/
|
|
if (cacheControl.startsWith("PUBLIC")) {
|
|
// ok, do nothing
|
|
} else if ((cacheControl.startsWith("PRIVATE")) ||
|
|
(cacheControl.startsWith("NO-CACHE")) ||
|
|
(cacheControl.startsWith("NO-STORE"))) {
|
|
// easy case
|
|
return "Stale_(denied_by_cache-control=" + cacheControl+ ")";
|
|
} else if (cacheControl.startsWith("MAX-AGE=")) {
|
|
// we need also the load date
|
|
if (date == null) return "Stale_(no_date_given_in_response)";
|
|
try {
|
|
long ttl = 1000 * Long.parseLong(cacheControl.substring(8)); // milliseconds to live
|
|
if ((new Date()).getTime() - date.getTime() > ttl) {
|
|
//System.out.println("***not indexed because cache-control");
|
|
return "Stale_(expired_by_cache-control)";
|
|
}
|
|
} catch (Exception e) {
|
|
return "Error_(" + e.getMessage() + ")";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
|
|
public String shallIndexCacheForCrawler() {
|
|
// decide upon header information if a specific file should be indexed
|
|
// this method returns null if the answer is 'YES'!
|
|
// if the answer is 'NO' (do not index), it returns a string with the reason
|
|
// to reject the crawling demand in clear text
|
|
|
|
// check profile
|
|
if (!(profile().localIndexing())) return "Indexing_Not_Allowed";
|
|
|
|
// -CGI access in request
|
|
// CGI access makes the page very individual, and therefore not usable in caches
|
|
if ((plasmaHTCache.isPOST(normalizedURLString())) && (!(profile().crawlingQ()))) return "Dynamic_(POST)";
|
|
if ((plasmaHTCache.isCGI(normalizedURLString())) && (!(profile().crawlingQ()))) return "Dynamic_(CGI)";
|
|
|
|
// -authorization cases in request
|
|
// we checked that in shallStoreCache
|
|
|
|
// -ranges in request
|
|
// we checked that in shallStoreCache
|
|
|
|
// a picture cannot be indexed
|
|
if (responseHeader() != null) {
|
|
if (plasmaHTCache.isPicture(responseHeader())) return "Media_Content_(Picture)";
|
|
if (!(plasmaHTCache.isText(responseHeader()))) return "Media_Content_(not_text)";
|
|
}
|
|
if (plasmaHTCache.noIndexingURL(normalizedURLString())) return "Media_Content_(forbidden)";
|
|
|
|
// -if-modified-since in request
|
|
// if the page is fresh at the very moment we can index it
|
|
// -> this does not apply for the crawler
|
|
|
|
// -cookies in request
|
|
// unfortunately, we cannot index pages which have been requested with a cookie
|
|
// because the returned content may be special for the client
|
|
// -> this does not apply for a crawler
|
|
|
|
// -set-cookie in response
|
|
// the set-cookie from the server does not indicate that the content is special
|
|
// thus we do not care about it here for indexing
|
|
// -> this does not apply for a crawler
|
|
|
|
// -pragma in cached response
|
|
// -> in the crawler we ignore this
|
|
|
|
// look for freshnes information
|
|
|
|
// -expires in cached response
|
|
// the expires value gives us a very easy hint when the cache is stale
|
|
// sometimes, the expires date is set to the past to prevent that a page is cached
|
|
// we use that information to see if we should index it
|
|
// -> this does not apply for a crawler
|
|
|
|
// -lastModified in cached response
|
|
// this information is too weak to use it to prevent indexing
|
|
// even if we can apply a TTL heuristic for cache usage
|
|
|
|
// -cache-control in cached response
|
|
// the cache-control has many value options.
|
|
// -> in the crawler we ignore this
|
|
|
|
return null;
|
|
}
|
|
|
|
}
|
|
}
|