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yacy_search_server/htroot/CrawlURLFetchStack_p.java
orbiter daf0f74361 joined anomic.net.URL, plasmaURL and url hash computation: 
search profiling showed, that a major amount of time is wasted by computing url hashes. The computation does an intranet-check, which needs a DNS lookup. This caused that each urlhash computation needed 100-200 milliseconds, which caused remote searches to delay at least 1 second more that necessary. The solution to this problem is to attach a URL hash to the URL data structure, because that means that the url hash value can be filled after retrieval of the URL from the database. The redesign of the url/urlhash management caused a major redesign of many parts of the software. Since some parts had been decided to be given up they had been removed during this change to avoid unnecessary maintenance of unused code.

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4074 6c8d7289-2bf4-0310-a012-ef5d649a1542
2007-09-05 09:01:35 +00:00

300 lines
14 KiB
Java
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// CrawlURLFetchStack_p.java
// -------------------------------------
// part of YACY
//
// (C) 2007 by Franz Brausze
//
// 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.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;
import de.anomic.yacy.yacyURL;
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;
}
/* =================================================================
* '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 yacyURL(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;
yacyURL url;
while (it.hasNext()) try {
url = new yacyURL((String) it.next(), null);
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;
yacyURL u = new yacyURL(url, null);
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, false);
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 yacyURL(url, null));
count++;
} catch (MalformedURLException e) {
serverLog.logInfo("URLFETCHER", "retrieved invalid url for adding to the stack: " + url);
}
}
return count;
}
}
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