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// IndexImportMediawiki.java
// -------------------------
// (C) 2009 by Michael Peter Christen; mc@yacy.net
// first published 04.05.2009 on http://yacy.net
// Frankfurt, Germany
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// 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
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.time.Instant;
import java.util.Date;
import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import net.yacy.cora.date.GenericFormatter;
import net.yacy.cora.document.encoding.UTF8;
import net.yacy.cora.document.id.MultiProtocolURL;
import net.yacy.cora.protocol.ClientIdentification;
import net.yacy.cora.protocol.HeaderFramework;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.cora.protocol.http.HTTPClient;
import net.yacy.cora.util.ConcurrentLog;
import net.yacy.data.TransactionManager;
import net.yacy.data.WorkTables;
import net.yacy.document.importer.MediawikiImporter;
import net.yacy.kelondro.blob.Tables.Row;
import net.yacy.search.Switchboard;
import net.yacy.server.serverObjects;
import net.yacy.server.serverSwitch;
/**
* Import of MediaWiki dump files in the local index.
*/
public class IndexImportMediawiki_p {
/**
* Run conditions :
* - no MediaWiki import thread is running : allow to start a new import by filling the "file" parameter
* - the MediaWiki import thread is running : returns monitoring information.
* @param header servlet request header
* @param post request parameters. Supported keys :
* <ul>
* <li>file : a dump URL or file path on this YaCy server local file system</li>
* <li>iffresh : when set to true, the dump file is imported only if its last modified date is unknown or after the last import trial date on this same file. </li>
* <li>report : when set, display the currently running thread monitoring info, or the last import report when no one is running.
* Ignored when no import thread is known.</li>
* </ul>
* @param env server environment
* @return the servlet answer object
*/
public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
final serverObjects prop = new serverObjects();
final Switchboard sb = (Switchboard) env;
if (MediawikiImporter.job != null && (MediawikiImporter.job.isAlive() || (post != null && post.containsKey("report")))) {
/* one import is running, or report was explicitly requested : no option to insert anything */
prop.put("import", 1);
/* Only refresh automatically when the job is running */
prop.put("refresh", MediawikiImporter.job.isAlive() ? 1 : 0);
final String jobErrorMessage = MediawikiImporter.job.status();
if( jobErrorMessage != null && !jobErrorMessage.isEmpty()) {
prop.put("import_status", 1);
prop.put("import_status_message", jobErrorMessage);
}
prop.put("import_thread", MediawikiImporter.job.isAlive() ? 2 : 0);
prop.put("import_dump", MediawikiImporter.job.source());
prop.put("import_count", MediawikiImporter.job.count());
prop.put("import_speed", MediawikiImporter.job.speed());
prop.put("import_runningHours", (MediawikiImporter.job.runningTime() / 60) / 60);
prop.put("import_runningMinutes", (MediawikiImporter.job.runningTime() / 60) % 60);
prop.put("import_remainingHours", (MediawikiImporter.job.remainingTime() / 60) / 60);
prop.put("import_remainingMinutes", (MediawikiImporter.job.remainingTime() / 60) % 60);
} else {
prop.put("import", 0);
prop.put("refresh", 0);
prop.put("import_prevReport", MediawikiImporter.job != null ? 1 : 0);
if (post == null) {
prop.put("import_status", 0);
/* Acquire a transaction token for the next POST form submission */
final String token = TransactionManager.getTransactionToken(header);
prop.put(TransactionManager.TRANSACTION_TOKEN_PARAM, token);
prop.put("import_" + TransactionManager.TRANSACTION_TOKEN_PARAM, token);
} else {
if (post.containsKey("file")) {
/* Check the transaction is valid */
TransactionManager.checkPostTransaction(header, post);
String file = post.get("file");
MultiProtocolURL sourceURL = null;
int status = 0;
String sourceFilePath = "";
final Row lastExecutedCall = WorkTables.selectLastExecutedApiCall("IndexImportMediawiki_p.html", post, sb);
Date lastExecutionDate = null;
if (lastExecutedCall != null) {
lastExecutionDate = lastExecutedCall.get(WorkTables.TABLE_API_COL_DATE_LAST_EXEC, (Date) null);
}
try {
sourceURL = new MultiProtocolURL(file);
if(sourceURL.isFile()) {
final File sourcefile = sourceURL.getFSFile();
sourceFilePath = sourcefile.getAbsolutePath();
if (!sourcefile.exists()) {
status = 2;
} else if (!sourcefile.canRead()) {
status = 3;
} else if (sourcefile.isDirectory()) {
status = 4;
}
}
if (status == 0 && post.getBoolean("iffresh")) {
long lastModified = getLastModified(sourceURL);
if (lastExecutionDate != null && lastModified != 0L && Instant.ofEpochMilli(lastModified)
.isBefore(lastExecutionDate.toInstant())) {
status = 5;
prop.put("import_status_lastImportDate", GenericFormatter
.formatSafely(lastExecutionDate.toInstant(), GenericFormatter.FORMAT_SIMPLE));
/* the import is not performed, but we increase here the api call count */
if(sb.tables != null) {
byte[] lastExecutedCallPk = lastExecutedCall.getPK();
if(lastExecutedCallPk != null && !post.containsKey(WorkTables.TABLE_API_COL_APICALL_PK)) {
post.add(WorkTables.TABLE_API_COL_APICALL_PK, UTF8.String(lastExecutedCallPk));
}
sb.tables.recordAPICall(post, "IndexImportMediawiki_p.html", WorkTables.TABLE_API_TYPE_DUMP, "MediaWiki Dump Import for " + sourceURL);
}
}
}
} catch (MalformedURLException e) {
status = 1;
}
if (status == 0) {
/* store this call as an api call */
if(sb.tables != null) {
/* We avoid creating a duplicate of any already recorded API call with the same parameters */
if(lastExecutedCall != null && !post.containsKey(WorkTables.TABLE_API_COL_APICALL_PK)) {
byte[] lastExecutedCallPk = lastExecutedCall.getPK();
if(lastExecutedCallPk != null) {
post.add(WorkTables.TABLE_API_COL_APICALL_PK, UTF8.String(lastExecutedCallPk));
}
}
sb.tables.recordAPICall(post, "IndexImportMediawiki_p.html", WorkTables.TABLE_API_TYPE_DUMP, "MediaWiki Dump Import for " + sourceURL);
}
MediawikiImporter.job = new MediawikiImporter(sourceURL, sb.surrogatesInPath);
MediawikiImporter.job.start();
prop.put("import_dump", MediawikiImporter.job.source());
prop.put("import_thread", 1);
prop.put("import", 1);
prop.put("refresh", 1);
} else {
prop.put("import_status", status);
prop.put("import_status_sourceFile", sourceFilePath);
/* Acquire a transaction token for the next POST form submission */
final String token = TransactionManager.getTransactionToken(header);
prop.put(TransactionManager.TRANSACTION_TOKEN_PARAM, token);
prop.put("import_" + TransactionManager.TRANSACTION_TOKEN_PARAM, token);
}
prop.put("import_count", 0);
prop.put("import_speed", 0);
prop.put("import_runningHours", 0);
prop.put("import_runningMinutes", 0);
prop.put("import_remainingHours", 0);
prop.put("import_remainingMinutes", 0);
}
}
}
return prop;
}
/**
* @param fileURL the file URL. Must not be null.
* @return the last modified date for the file at fileURL, or 0L when unknown or when an error occurred
*/
private static long getLastModified(MultiProtocolURL fileURL) {
try {
if (fileURL.isHTTP() || fileURL.isHTTPS()) {
/* http(s) : we do not use MultiprotocolURL.lastModified() which always returns 0L for these protocols */
try (HTTPClient httpClient = new HTTPClient(ClientIdentification.yacyInternetCrawlerAgent)) {
HttpResponse headResponse = httpClient.HEADResponse(fileURL, false);
if (headResponse != null && headResponse.getStatusLine() != null
&& headResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
Header lastModifiedHeader = headResponse
.getFirstHeader(HeaderFramework.LAST_MODIFIED);
if (lastModifiedHeader != null) {
Date lastModifiedDate = HeaderFramework.parseHTTPDate(lastModifiedHeader.getValue());
if(lastModifiedDate != null) {
return lastModifiedDate.getTime();
}
}
}
}
} else {
return fileURL.lastModified();
}
} catch (IOException ignored) {
ConcurrentLog.warn("IndexImportMediawiki_p", "Could not retrieve last modified date for dump file at " + fileURL);
}
return 0l;
}
}
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