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81b4598487
yacy_search_server/htroot/CrawlURLFetchStack_p.java
orbiter 861f41e67e redesigned NURL-handling: 
- the general NURL-index for all crawl stack types was splitted into separate indexes for these stacks
- the new NURL-index is managed by the crawl balancer
- the crawl balancer does not need an internal index any more, it is replaced by the NURL-index
- the NURL.Entry was generalized and is now a new class plasmaCrawlEntry
- the new class plasmaCrawlEntry replaces also the preNURL.Entry class, and will also replace the switchboardEntry class in the future
- the new class plasmaCrawlEntry is more accurate for date entries (holds milliseconds) and can contain larger 'name' entries (anchor tag names)
- the EURL object was replaced by a new ZURL object, which is a container for the plasmaCrawlEntry and some tracking information
- the EURL index is now filled with ZURL objects
- a new index delegatedURL holds ZURL objects about plasmaCrawlEntry obects to track which url is handed over to other peers
- redesigned handling of plasmaCrawlEntry - handover, because there is no need any more to convert one entry object into another
- found and fixed numerous bugs in the context of crawl state handling
- fixed a serious bug in kelondroCache which caused that entries could not be removed
- fixed some bugs in online interface and adopted monitor output to new entry objects
- adopted yacy protocol to handle new delegatedURL entries
all old crawl queues will disappear after this update!

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@3483 6c8d7289-2bf4-0310-a012-ef5d649a1542
2007-03-16 13:25:56 +00:00

301 lines
14 KiB
Java
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// CrawlURLFetchStack_p.java
// -------------------------------------
// part of YACY
//
// (C) 2007 by Franz Brausse
//
// last change: $LastChangedDate: $ by $LastChangedBy: $
//
// 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.
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Writer;
import java.net.MalformedURLException;
import java.util.HashMap;
import java.util.Iterator;
import de.anomic.data.URLFetcherStack;
import de.anomic.htmlFilter.htmlFilterContentScraper;
import de.anomic.htmlFilter.htmlFilterWriter;
import de.anomic.http.httpHeader;
import de.anomic.net.URL;
import de.anomic.plasma.plasmaCrawlEntry;
import de.anomic.plasma.plasmaCrawlNURL;
import de.anomic.plasma.plasmaSwitchboard;
import de.anomic.plasma.urlPattern.plasmaURLPattern;
import de.anomic.server.serverFileUtils;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
import de.anomic.server.logging.serverLog;
public class CrawlURLFetchStack_p {
public static final HashMap /* of PeerName, sent URLs */ fetchMap = new HashMap();
private static URLFetcherStack stack = null;
public static int maxURLsPerFetch = 50;
public static URLFetcherStack getURLFetcherStack(serverSwitch env) {
if (stack == null) try {
stack = new URLFetcherStack(env.getConfig(plasmaSwitchboard.DBPATH, plasmaSwitchboard.DBPATH_DEFAULT));
} catch (IOException e) {
serverLog.logSevere("URLFETCHER", "Couldn't initialize URL stack: " + e.getMessage());
}
return stack;
}
public static final String STREAM_CMD_ADDURLS_ = "ADD URLS: ";
public static final String STREAM_CMD_ADDURLSBLCHK_ = "ADD URLS CHECK BLACKLIST: ";
public static final String STREAM_CMD_END = "END";
public static final String STREAM_RESP_OK_ADDURLS_ = "FAILED URLS: ";
public static final String STREAM_RESP_OK = "OK";
public static final String STREAM_RESP_FAILED = "FAILED";
public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch env) {
final serverObjects prop = new serverObjects();
plasmaSwitchboard sb = (plasmaSwitchboard)env;
if (((String)header.get(httpHeader.CONNECTION_PROP_PATH)).endsWith(".stream")) {
/* =================================================================
* .stream request
* ================================================================= */
InputStream in = (InputStream)header.get(httpHeader.CONNECTION_PROP_INPUTSTREAM);
OutputStream out = (OutputStream)header.get(httpHeader.CONNECTION_PROP_OUTPUTSTREAM);
BufferedReader inrb = new BufferedReader(new InputStreamReader(in));
PrintWriter outw = new PrintWriter(out);
String line;
int addurls = 0, cururl = 0;
boolean[] status = new boolean[0];
boolean blchk = false;
URLFetcherStack stack = getURLFetcherStack(env);
try {
while ((line = inrb.readLine()) != null) {
// commands
if (line.startsWith(STREAM_CMD_ADDURLS_)) {
try {
addurls = Integer.parseInt(line.substring(STREAM_CMD_ADDURLS_.length()));
status = new boolean[addurls];
cururl = 0;
blchk = false;
outw.println(STREAM_RESP_OK);
} catch (NumberFormatException e) {
outw.println(STREAM_RESP_FAILED);
}
} else if (line.startsWith(STREAM_CMD_ADDURLSBLCHK_)) {
try {
addurls = Integer.parseInt(line.substring(STREAM_CMD_ADDURLSBLCHK_.length()));
status = new boolean[addurls];
cururl = 0;
blchk = true;
outw.println(STREAM_RESP_OK);
} catch (NumberFormatException e) {
outw.println(STREAM_RESP_FAILED);
}
} else if (line.equals(STREAM_CMD_END)) {
break;
} else {
if (cururl < addurls) // add url
status[cururl++] = addURL(line, blchk, stack);
if (cururl > 0 && cururl == addurls ) {
// done with parsing the passed URL count, now some status output: i.e. 'FAILED URLS: 5 of 8'
outw.print(STREAM_RESP_OK_ADDURLS_);
StringBuffer stat = new StringBuffer();
for (int i=0; i<status.length; i++)
if (!status[i]) stat.append(i).append(", ");
outw.print(stat.substring(0, stat.length() - 2));
outw.print(" of ");
outw.println(status.length);
cururl = 0;
addurls = 0;
}
}
}
} catch (IOException e) { e.printStackTrace(); }
outw.flush();
return null;
} else {
/* =================================================================
* 'normal' request
* ================================================================= */
if (post != null) {
if (post.containsKey("addurls")) {
prop.put("addedUrls", 1);
prop.put("addedUrls_added", addURLs(post, post.getInt("addurls", -1), getURLFetcherStack(env)));
}
else if (post.containsKey("setMaxSize")) {
final int count = post.getInt("maxSize", maxURLsPerFetch);
if (count > 0) {
maxURLsPerFetch = count;
prop.put("set", 1);
prop.put("set_value", maxURLsPerFetch);
} else {
prop.put("set", 2);
prop.put("set_value", count);
}
}
else if (post.containsKey("shiftlcq")) {
final int count = Math.min(post.getInt("shiftloc", 0), sb.noticeURL.stackSize(plasmaCrawlNURL.STACK_TYPE_CORE));
final int failed = shiftFromNotice(sb.noticeURL, plasmaCrawlNURL.STACK_TYPE_CORE, getURLFetcherStack(env), count);
prop.put("shiftloc", 1);
prop.put("shiftloc_value", count - failed);
prop.put("shiftloc_failed", failed);
}
else if (post.containsKey("shiftrcq")) {
final int count = post.getInt("shiftrem", 0);
final int failed = shiftFromNotice(sb.noticeURL, plasmaCrawlNURL.STACK_TYPE_LIMIT, getURLFetcherStack(env), count);
prop.put("shiftrem", 1);
prop.put("shiftrem_value", count - failed);
prop.put("shiftrem_failed", failed);
}
else if (post.containsKey("subupload")) {
if (post.get("upload", "").length() == 0) {
prop.put("uploadError", 1);
} else {
final File file = new File(post.get("upload", ""));
final String content = new String((byte[])post.get("upload$file"));
final String type = post.get("uploadType", "");
final boolean blCheck = post.containsKey("blacklistCheck");
if (type.equals("plain")) {
prop.put("upload_added", addURLs(content.split("\n"), blCheck, getURLFetcherStack(env)));
prop.put("upload_failed", 0);
prop.put("upload", 1);
} else if (type.equals("html")) {
try {
final htmlFilterContentScraper scraper = new htmlFilterContentScraper(new URL(file));
final Writer writer = new htmlFilterWriter(null, null, scraper, null, false);
serverFileUtils.write(content, writer);
writer.close();
final Iterator it = ((HashMap)scraper.getAnchors()).keySet().iterator();
int added = 0, failed = 0;
URL url;
while (it.hasNext()) try {
url = new URL((String)it.next());
if (blCheck && plasmaSwitchboard.urlBlacklist.isListed(plasmaURLPattern.BLACKLIST_CRAWLER, url)) {
failed++;
continue;
}
getURLFetcherStack(env).push(url);
added++;
} catch (MalformedURLException e) { failed++; }
prop.put("upload", 1);
prop.put("upload_added", added);
prop.put("upload_failed", failed);
} catch (Exception e) {
e.printStackTrace();
prop.put("upload", 2);
prop.put("upload_error", e.getMessage());
}
}
}
}
}
}
putFetched(prop);
prop.put("urlCount", getURLFetcherStack(env).size());
prop.put("totalFetched", getURLFetcherStack(env).getPopped());
prop.put("totalAdded", getURLFetcherStack(env).getPushed());
prop.put("maxSize", maxURLsPerFetch);
prop.put("locurls", sb.noticeURL.stackSize(plasmaCrawlNURL.STACK_TYPE_CORE));
prop.put("remurls", sb.noticeURL.stackSize(plasmaCrawlNURL.STACK_TYPE_LIMIT));
prop.put("locurlsVal", Math.min(sb.noticeURL.stackSize(plasmaCrawlNURL.STACK_TYPE_CORE), 500));
prop.put("remurlsVal", Math.min(sb.noticeURL.stackSize(plasmaCrawlNURL.STACK_TYPE_LIMIT), 500));
return prop;
}
private static void putFetched(serverObjects prop) {
Iterator it = fetchMap.keySet().iterator();
int count = 0;
while (it.hasNext()) {
String key = (String)it.next();
prop.put("peers_" + count + "_peer", key);
prop.put("peers_" + count + "_amount", ((Integer)fetchMap.get(key)).intValue());
count++;
}
prop.put("peers", count);
}
private static int addURLs(String[] urls, boolean blCheck, URLFetcherStack stack) {
int count = -1;
for (int i=0; i<urls.length; i++)
if (addURL(urls[i], blCheck, stack)) count++;
return count;
}
private static boolean addURL(String url, boolean blCheck, URLFetcherStack stack) {
try {
if (url == null || url.length() == 0) return false;
URL u = new URL(url);
if (blCheck && plasmaSwitchboard.urlBlacklist.isListed(plasmaURLPattern.BLACKLIST_CRAWLER, u)) return false;
stack.push(u);
return true;
} catch (MalformedURLException e) { return false; }
}
private static int shiftFromNotice(plasmaCrawlNURL nurl, int fromStackType, URLFetcherStack stack, int count) {
plasmaCrawlEntry entry;
int failed = 0;
for (int i=0; i<count; i++) try {
entry = nurl.pop(fromStackType);
stack.push(entry.url());
} catch (IOException e) { failed++; }
return failed;
}
private static int addURLs(serverObjects post, int amount, URLFetcherStack stack) {
int count = 0;
String url;
for (int i=0; i<amount; i++) {
url = post.get("url" + i, null);
if (url == null || url.length() == 0) continue;
try {
stack.push(new URL(url));
count++;
} catch (MalformedURLException e) {
serverLog.logInfo("URLFETCHER", "retrieved invalid url for adding to the stack: " + url);
}
}
return count;
}
}
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