// urls.java
// (C) 2007 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
// first published 22.08.2007 on http://yacy.net
//
// This is a part of YaCy, a peer-to-peer based web search engine
//
// $LastChangedDate: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
// $LastChangedRevision: 1986 $
// $LastChangedBy: orbiter $
//
// 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
import java.io.IOException;
import java.util.Date;
import net.yacy.cora.date.GenericFormatter;
import net.yacy.cora.document.ASCII;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.kelondro.data.meta.DigestURI;
import net.yacy.kelondro.data.meta.URIMetadataRow;
import de.anomic.crawler.NoticedURL;
import de.anomic.crawler.ZURL.FailCategory;
import de.anomic.crawler.retrieval.Request;
import de.anomic.search.Segments;
import de.anomic.search.Switchboard;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
import de.anomic.yacy.yacyNetwork;
public class urls {
public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
final Switchboard sb = (Switchboard) env;
// insert default values
final serverObjects prop = new serverObjects();
prop.put("iam", sb.peers.mySeed().hash);
prop.put("response", "rejected - insufficient call parameters");
prop.put("channel_title", "");
prop.put("channel_description", "");
prop.put("channel_pubDate", "");
prop.put("item", "0");
if ((post == null) || (env == null)) return prop;
if (!yacyNetwork.authentifyRequest(post, env)) return prop;
if (post.get("call", "").equals("remotecrawl")) {
// perform a remote crawl url handover
final NoticedURL.StackType stackType = NoticedURL.StackType.LIMIT;
int maxCount = Math.min(100, post.getInt("count", 10));
long maxTime = Math.min(20000, Math.max(1000, post.getInt("time", 10000)));
long timeout = System.currentTimeMillis() + maxTime;
int c = 0;
Request entry;
DigestURI referrer;
while ((maxCount > 0) &&
(System.currentTimeMillis() < timeout) &&
(sb.crawlQueues.noticeURL.stackSize(stackType) > 0)) {
try {
entry = sb.crawlQueues.noticeURL.pop(stackType, false, sb.crawler);
} catch (final IOException e) {
break;
}
if (entry == null) break;
// find referrer, if there is one
referrer = sb.getURL(Segments.Process.PUBLIC, entry.referrerhash());
// place url to notice-url db
sb.crawlQueues.delegatedURL.push(
entry,
sb.peers.mySeed().hash.getBytes(),
new Date(),
0,
FailCategory.FINAL_PROCESS_CONTEXT,
"client=____________",
-1);
// create RSS entry
prop.put("item_" + c + "_title", "");
prop.putXML("item_" + c + "_link", entry.url().toNormalform(true, false));
prop.putXML("item_" + c + "_referrer", (referrer == null) ? "" : referrer.toNormalform(true, false));
prop.putXML("item_" + c + "_description", entry.name());
prop.put("item_" + c + "_author", "");
prop.put("item_" + c + "_pubDate", GenericFormatter.SHORT_SECOND_FORMATTER.format(entry.appdate()));
prop.put("item_" + c + "_guid", entry.url().hash());
c++;
maxCount--;
}
prop.put("item", c);
prop.putXML("response", "ok");
}
if (post.get("call", "").equals("urlhashlist")) {
// retrieve a list of urls from the LURL-db by a given list of url hashes
final String urlhashes = post.get("hashes", "");
if (urlhashes.length() % 12 != 0) return prop;
final int count = urlhashes.length() / 12;
int c = 0;
URIMetadataRow entry;
URIMetadataRow.Components metadata;
DigestURI referrer;
for (int i = 0; i < count; i++) {
entry = sb.indexSegments.urlMetadata(Segments.Process.PUBLIC).load(ASCII.getBytes(urlhashes.substring(12 * i, 12 * (i + 1))));
if (entry == null) continue;
// find referrer, if there is one
referrer = sb.getURL(Segments.Process.PUBLIC, entry.referrerHash());
// create RSS entry
metadata = entry.metadata();
prop.put("item_" + c + "_title", metadata.dc_title());
prop.putXML("item_" + c + "_link", metadata.url().toNormalform(true, false));
prop.putXML("item_" + c + "_referrer", (referrer == null) ? "" : referrer.toNormalform(true, false));
prop.putXML("item_" + c + "_description", metadata.dc_title());
prop.put("item_" + c + "_author", metadata.dc_creator());
prop.put("item_" + c + "_pubDate", GenericFormatter.SHORT_SECOND_FORMATTER.format(entry.moddate()));
prop.put("item_" + c + "_guid", ASCII.String(entry.hash()));
c++;
}
prop.put("item", c);
prop.putXML("response", "ok");
}
// return rewrite properties
return prop;
}
}