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.
253 lines
10 KiB
253 lines
10 KiB
// CrawlerWorker.java
|
|
// -------------------------------------
|
|
// part of YACY
|
|
// (C) by Michael Peter Christen; mc@anomic.de
|
|
// first published on http://www.anomic.de
|
|
// Frankfurt, Germany, 2006
|
|
//
|
|
// This file ist contributed by Martin Thelian
|
|
//
|
|
// $LastChangedDate: 2006-02-20 23:57:42 +0100 (Mo, 20 Feb 2006) $
|
|
// $LastChangedRevision: 1715 $
|
|
// $LastChangedBy: theli $
|
|
//
|
|
// 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.crawler;
|
|
|
|
import java.io.ByteArrayOutputStream;
|
|
import java.io.File;
|
|
import java.io.FileOutputStream;
|
|
import java.io.PrintStream;
|
|
import java.io.PrintWriter;
|
|
import java.util.Date;
|
|
|
|
import de.anomic.net.ftpc;
|
|
import de.anomic.plasma.plasmaCrawlEURL;
|
|
import de.anomic.plasma.plasmaCrawlEntry;
|
|
import de.anomic.plasma.plasmaHTCache;
|
|
import de.anomic.plasma.plasmaParser;
|
|
import de.anomic.plasma.plasmaSwitchboard;
|
|
import de.anomic.plasma.cache.ftp.ResourceInfo;
|
|
import de.anomic.server.logging.serverLog;
|
|
|
|
public class plasmaFTPLoader {
|
|
|
|
private plasmaSwitchboard sb;
|
|
private serverLog log;
|
|
|
|
public plasmaFTPLoader(plasmaSwitchboard sb, serverLog log) {
|
|
this.sb = sb;
|
|
this.log = log;
|
|
}
|
|
|
|
protected plasmaHTCache.Entry createCacheEntry(plasmaCrawlEntry entry, String mimeType, Date fileDate) {
|
|
return plasmaHTCache.newEntry(
|
|
new Date(),
|
|
entry.depth(),
|
|
entry.url(),
|
|
entry.name(),
|
|
"OK",
|
|
new ResourceInfo(
|
|
entry.url(),
|
|
sb.getURL(entry.referrerhash()),
|
|
mimeType,
|
|
fileDate
|
|
),
|
|
entry.initiator(),
|
|
sb.profilesActiveCrawls.getEntry(entry.profileHandle())
|
|
);
|
|
}
|
|
|
|
public plasmaHTCache.Entry load(plasmaCrawlEntry entry) {
|
|
|
|
ByteArrayOutputStream bout = new ByteArrayOutputStream();
|
|
PrintStream out = new PrintStream(bout);
|
|
|
|
ByteArrayOutputStream berr = new ByteArrayOutputStream();
|
|
PrintStream err = new PrintStream(berr);
|
|
|
|
// create a new ftp client
|
|
ftpc ftpClient = new ftpc(System.in, out, err);
|
|
|
|
// get username and password
|
|
String userInfo = entry.url().getUserInfo();
|
|
String userName = "anonymous", userPwd = "anonymous";
|
|
if (userInfo != null) {
|
|
int pos = userInfo.indexOf(":");
|
|
if (pos != -1) {
|
|
userName = userInfo.substring(0,pos);
|
|
userPwd = userInfo.substring(pos+1);
|
|
}
|
|
}
|
|
|
|
// get server name, port and file path
|
|
String host = entry.url().getHost();
|
|
String fullPath = entry.url().getPath();
|
|
int port = entry.url().getPort();
|
|
|
|
plasmaHTCache.Entry htCache = null;
|
|
try {
|
|
// open a connection to the ftp server
|
|
if (port == -1) {
|
|
ftpClient.exec("open " + host, false);
|
|
} else {
|
|
ftpClient.exec("open " + host + " " + port, false);
|
|
}
|
|
|
|
// login to the server
|
|
ftpClient.exec("user " + userName + " " + userPwd, false);
|
|
|
|
// change transfer mode to binary
|
|
ftpClient.exec("binary", false);
|
|
|
|
// determine filename and path
|
|
String file, path;
|
|
if (fullPath.endsWith("/")) {
|
|
file = "";
|
|
path = fullPath;
|
|
} else {
|
|
int pos = fullPath.lastIndexOf("/");
|
|
if (pos == -1) {
|
|
file = fullPath;
|
|
path = "/";
|
|
} else {
|
|
path = fullPath.substring(0,pos+1);
|
|
file = fullPath.substring(pos+1);
|
|
}
|
|
}
|
|
|
|
// testing if the specified file is a directory
|
|
if (file.length() > 0) {
|
|
ftpClient.exec("cd \"" + path + "\"", false);
|
|
|
|
// testing if the current name is a directoy
|
|
boolean isFolder = ftpClient.isFolder(file);
|
|
if (isFolder) {
|
|
fullPath = fullPath + "/";
|
|
file = "";
|
|
}
|
|
}
|
|
|
|
// creating a cache file object
|
|
File cacheFile = plasmaHTCache.getCachePath(entry.url());
|
|
|
|
// TODO: aborting download if content is to long ...
|
|
|
|
// TODO: invalid file path check
|
|
|
|
// testing if the file already exists
|
|
if (cacheFile.isFile()) {
|
|
// delete the file if it already exists
|
|
plasmaHTCache.deleteURLfromCache(entry.url());
|
|
} else {
|
|
// create parent directories
|
|
cacheFile.getParentFile().mkdirs();
|
|
}
|
|
|
|
String mimeType;
|
|
Date fileDate;
|
|
if (file.length() == 0) {
|
|
// getting the dirlist
|
|
mimeType = "text/html";
|
|
fileDate = new Date();
|
|
|
|
// create a htcache entry
|
|
htCache = createCacheEntry(entry, mimeType, fileDate);
|
|
|
|
// generate the dirlist
|
|
StringBuffer dirList = ftpClient.dirhtml(fullPath);
|
|
|
|
if (dirList != null && dirList.length() > 0) try {
|
|
// write it into a file
|
|
PrintWriter writer = new PrintWriter(new FileOutputStream(cacheFile),false);
|
|
writer.write(dirList.toString());
|
|
writer.flush();
|
|
writer.close();
|
|
} catch (Exception e) {
|
|
this.log.logInfo("Unable to write dirlist for URL " + entry.url().toString());
|
|
htCache = null;
|
|
}
|
|
} else {
|
|
// determine the mimetype of the resource
|
|
String extension = plasmaParser.getFileExt(entry.url());
|
|
mimeType = plasmaParser.getMimeTypeByFileExt(extension);
|
|
|
|
// if the mimetype and file extension is supported we start to download the file
|
|
if (plasmaParser.supportedContent(plasmaParser.PARSER_MODE_CRAWLER, entry.url(), mimeType)) {
|
|
|
|
// TODO: determine the real file date
|
|
fileDate = new Date();
|
|
|
|
// create a htcache entry
|
|
htCache = createCacheEntry(entry, mimeType, fileDate);
|
|
|
|
// change into working directory
|
|
ftpClient.exec("cd \"" + fullPath + "\"", false);
|
|
|
|
// download the remote file
|
|
ftpClient.exec("get \"" + file + "\" \"" + cacheFile.getAbsolutePath() + "\"", false);
|
|
} else {
|
|
// if the response has not the right file type then reject file
|
|
this.log.logInfo("REJECTED WRONG MIME/EXT TYPE " + mimeType + " for URL " + entry.url().toString());
|
|
sb.crawlQueues.errorURL.newEntry(entry, null, new Date(), 1, plasmaCrawlEURL.DENIED_WRONG_MIMETYPE_OR_EXT);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// pass the downloaded resource to the cache manager
|
|
if (berr.size() > 0 || htCache == null) {
|
|
// if the response has not the right file type then reject file
|
|
this.log.logWarning("Unable to download URL " + entry.url().toString() + "\nErrorlog: " + berr.toString());
|
|
sb.crawlQueues.errorURL.newEntry(entry, null, new Date(), 1, plasmaCrawlEURL.DENIED_SERVER_DOWNLOAD_ERROR);
|
|
|
|
// an error has occured. cleanup
|
|
if (cacheFile.exists()) cacheFile.delete();
|
|
} else {
|
|
// announce the file
|
|
plasmaHTCache.writeFileAnnouncement(cacheFile);
|
|
}
|
|
|
|
return htCache;
|
|
} finally {
|
|
// closing connection
|
|
ftpClient.exec("close", false);
|
|
ftpClient.exec("exit", false);
|
|
}
|
|
}
|
|
|
|
|
|
}
|