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.
323 lines
16 KiB
323 lines
16 KiB
//HTTPLoader.java
|
|
//------------------------
|
|
//part of YaCy
|
|
//(C) by Michael Peter Christen; mc@yacy.net
|
|
//first published on http://www.anomic.de
|
|
//Frankfurt, Germany, 2006
|
|
//
|
|
// $LastChangedDate$
|
|
// $LastChangedRevision$
|
|
// $LastChangedBy$
|
|
//
|
|
//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
|
|
|
|
package de.anomic.crawler.retrieval;
|
|
|
|
import java.io.IOException;
|
|
import java.util.Date;
|
|
|
|
import net.yacy.kelondro.logging.Log;
|
|
|
|
import de.anomic.crawler.Latency;
|
|
import de.anomic.data.Blacklist;
|
|
import de.anomic.document.Parser;
|
|
import de.anomic.http.client.Client;
|
|
import de.anomic.http.metadata.HeaderFramework;
|
|
import de.anomic.http.metadata.RequestHeader;
|
|
import de.anomic.http.metadata.ResponseContainer;
|
|
import de.anomic.kelondro.text.Segments;
|
|
import de.anomic.search.Switchboard;
|
|
import de.anomic.yacy.yacyURL;
|
|
|
|
public final class HTTPLoader {
|
|
|
|
private static final String DEFAULT_ENCODING = "gzip,deflate";
|
|
private static final String DEFAULT_LANGUAGE = "en-us,en;q=0.5";
|
|
private static final String DEFAULT_CHARSET = "ISO-8859-1,utf-8;q=0.7,*;q=0.7";
|
|
private static final long DEFAULT_MAXFILESIZE = 1024 * 1024 * 10;
|
|
public static final int DEFAULT_CRAWLING_RETRY_COUNT = 5;
|
|
public static final String crawlerUserAgent = "yacybot (" + Client.getSystemOST() +") http://yacy.net/bot.html";
|
|
public static final String yacyUserAgent = "yacy (" + Client.getSystemOST() +") yacy.net";
|
|
|
|
/**
|
|
* The socket timeout that should be used
|
|
*/
|
|
private final int socketTimeout;
|
|
|
|
/**
|
|
* The maximum allowed file size
|
|
*/
|
|
//private long maxFileSize = -1;
|
|
|
|
//private String acceptEncoding;
|
|
//private String acceptLanguage;
|
|
//private String acceptCharset;
|
|
private final Switchboard sb;
|
|
private final Log log;
|
|
|
|
public HTTPLoader(final Switchboard sb, final Log theLog) {
|
|
this.sb = sb;
|
|
this.log = theLog;
|
|
|
|
// refreshing timeout value
|
|
this.socketTimeout = (int) sb.getConfigLong("crawler.clientTimeout", 10000);
|
|
}
|
|
|
|
public Response load(final Request entry, final boolean acceptOnlyParseable) throws IOException {
|
|
long start = System.currentTimeMillis();
|
|
Response doc = load(entry, acceptOnlyParseable, DEFAULT_CRAWLING_RETRY_COUNT);
|
|
Latency.update(entry.url().hash().substring(6), entry.url().getHost(), System.currentTimeMillis() - start);
|
|
return doc;
|
|
}
|
|
|
|
private Response load(final Request request, boolean acceptOnlyParseable, final int retryCount) throws IOException {
|
|
|
|
if (retryCount < 0) {
|
|
sb.crawlQueues.errorURL.newEntry(request, sb.peers.mySeed().hash, new Date(), 1, "redirection counter exceeded").store();
|
|
throw new IOException("Redirection counter exceeded for URL " + request.url().toString() + ". Processing aborted.");
|
|
}
|
|
|
|
final String host = request.url().getHost();
|
|
if (host == null || host.length() < 2) throw new IOException("host is not well-formed: '" + host + "'");
|
|
final String path = request.url().getFile();
|
|
int port = request.url().getPort();
|
|
final boolean ssl = request.url().getProtocol().equals("https");
|
|
if (port < 0) port = (ssl) ? 443 : 80;
|
|
|
|
// if not the right file type then reject file
|
|
if (acceptOnlyParseable) {
|
|
String supportError = Parser.supportsExtension(request.url());
|
|
if (supportError != null) {
|
|
sb.crawlQueues.errorURL.newEntry(request, sb.peers.mySeed().hash, new Date(), 1, supportError);
|
|
throw new IOException("REJECTED WRONG EXTENSION TYPE: " + supportError);
|
|
}
|
|
}
|
|
|
|
// check if url is in blacklist
|
|
final String hostlow = host.toLowerCase();
|
|
if (Switchboard.urlBlacklist.isListed(Blacklist.BLACKLIST_CRAWLER, hostlow, path)) {
|
|
sb.crawlQueues.errorURL.newEntry(request, sb.peers.mySeed().hash, new Date(), 1, "url in blacklist").store();
|
|
throw new IOException("CRAWLER Rejecting URL '" + request.url().toString() + "'. URL is in blacklist.");
|
|
}
|
|
|
|
// take a file from the net
|
|
Response response = null;
|
|
final long maxFileSize = sb.getConfigLong("crawler.http.maxFileSize", DEFAULT_MAXFILESIZE);
|
|
|
|
// create a request header
|
|
final RequestHeader requestHeader = new RequestHeader();
|
|
requestHeader.put(HeaderFramework.USER_AGENT, crawlerUserAgent);
|
|
yacyURL refererURL = null;
|
|
if (request.referrerhash() != null) refererURL = sb.getURL(Segments.Process.LOCALCRAWLING, request.referrerhash());
|
|
if (refererURL != null) requestHeader.put(RequestHeader.REFERER, refererURL.toNormalform(true, true));
|
|
requestHeader.put(HeaderFramework.ACCEPT_LANGUAGE, sb.getConfig("crawler.http.acceptLanguage", DEFAULT_LANGUAGE));
|
|
requestHeader.put(HeaderFramework.ACCEPT_CHARSET, sb.getConfig("crawler.http.acceptCharset", DEFAULT_CHARSET));
|
|
requestHeader.put(HeaderFramework.ACCEPT_ENCODING, sb.getConfig("crawler.http.acceptEncoding", DEFAULT_ENCODING));
|
|
|
|
// HTTP-Client
|
|
final Client client = new Client(socketTimeout, requestHeader);
|
|
|
|
ResponseContainer res = null;
|
|
try {
|
|
// send request
|
|
res = client.GET(request.url().toString(), maxFileSize);
|
|
// FIXME: 30*-handling (bottom) is never reached
|
|
// we always get the final content because httpClient.followRedirects = true
|
|
|
|
if (res.getStatusCode() == 200 || res.getStatusCode() == 203) {
|
|
// the transfer is ok
|
|
|
|
if (acceptOnlyParseable) {
|
|
// if the response has not the right file type then reject file
|
|
String supportError = Parser.supports(request.url(), res.getResponseHeader().mime());
|
|
if (supportError != null) {
|
|
sb.crawlQueues.errorURL.newEntry(request, sb.peers.mySeed().hash, new Date(), 1, supportError);
|
|
throw new IOException("REJECTED WRONG MIME TYPE: " + supportError);
|
|
}
|
|
}
|
|
|
|
// we write the new cache entry to file system directly
|
|
res.setAccountingName("CRAWLER");
|
|
final byte[] responseBody = res.getData();
|
|
long contentLength = responseBody.length;
|
|
|
|
// check length again in case it was not possible to get the length before loading
|
|
if (maxFileSize > 0 && contentLength > maxFileSize) {
|
|
sb.crawlQueues.errorURL.newEntry(request, sb.peers.mySeed().hash, new Date(), 1, "file size limit exceeded");
|
|
throw new IOException("REJECTED URL " + request.url() + " because file size '" + contentLength + "' exceeds max filesize limit of " + maxFileSize + " bytes. (GET)");
|
|
}
|
|
|
|
// create a new cache entry
|
|
response = new Response(
|
|
request,
|
|
requestHeader,
|
|
res.getResponseHeader(),
|
|
res.getStatusLine(),
|
|
sb.crawler.profilesActiveCrawls.getEntry(request.profileHandle()),
|
|
responseBody
|
|
);
|
|
|
|
return response;
|
|
} else if (res.getStatusLine().startsWith("30")) {
|
|
if (res.getResponseHeader().containsKey(HeaderFramework.LOCATION)) {
|
|
// getting redirection URL
|
|
String redirectionUrlString = res.getResponseHeader().get(HeaderFramework.LOCATION);
|
|
redirectionUrlString = redirectionUrlString.trim();
|
|
|
|
if (redirectionUrlString.length() == 0) {
|
|
sb.crawlQueues.errorURL.newEntry(request, sb.peers.mySeed().hash, new Date(), 1, "redirection header empy");
|
|
throw new IOException("CRAWLER Redirection of URL=" + request.url().toString() + " aborted. Location header is empty.");
|
|
}
|
|
|
|
// normalizing URL
|
|
final yacyURL redirectionUrl = yacyURL.newURL(request.url(), redirectionUrlString);
|
|
|
|
// restart crawling with new url
|
|
this.log.logInfo("CRAWLER Redirection detected ('" + res.getStatusLine() + "') for URL " + request.url().toString());
|
|
this.log.logInfo("CRAWLER ..Redirecting request to: " + redirectionUrl);
|
|
|
|
// if we are already doing a shutdown we don't need to retry crawling
|
|
if (Thread.currentThread().isInterrupted()) {
|
|
sb.crawlQueues.errorURL.newEntry(request, sb.peers.mySeed().hash, new Date(), 1, "server shutdown");
|
|
throw new IOException("CRAWLER Retry of URL=" + request.url().toString() + " aborted because of server shutdown.");
|
|
}
|
|
|
|
// generating url hash
|
|
final String urlhash = redirectionUrl.hash();
|
|
|
|
// check if the url was already indexed
|
|
final String dbname = sb.urlExists(Segments.Process.LOCALCRAWLING, urlhash);
|
|
if (dbname != null) {
|
|
sb.crawlQueues.errorURL.newEntry(request, sb.peers.mySeed().hash, new Date(), 1, "redirection to double content");
|
|
throw new IOException("CRAWLER Redirection of URL=" + request.url().toString() + " ignored. The url appears already in db " + dbname);
|
|
}
|
|
|
|
// retry crawling with new url
|
|
request.redirectURL(redirectionUrl);
|
|
return load(request, acceptOnlyParseable, retryCount - 1);
|
|
}
|
|
} else {
|
|
// if the response has not the right response type then reject file
|
|
sb.crawlQueues.errorURL.newEntry(request, sb.peers.mySeed().hash, new Date(), 1, "wrong http status code " + res.getStatusCode() + ")");
|
|
throw new IOException("REJECTED WRONG STATUS TYPE '" + res.getStatusLine() + "' for URL " + request.url().toString());
|
|
}
|
|
} finally {
|
|
if(res != null) {
|
|
// release connection
|
|
res.closeStream();
|
|
}
|
|
}
|
|
return response;
|
|
}
|
|
|
|
public static Response load(final Request request) throws IOException {
|
|
return load(request, 3);
|
|
}
|
|
|
|
private static Response load(final Request request, int retryCount) throws IOException {
|
|
|
|
if (retryCount < 0) {
|
|
throw new IOException("Redirection counter exceeded for URL " + request.url().toString() + ". Processing aborted.");
|
|
}
|
|
|
|
final String host = request.url().getHost();
|
|
if (host == null || host.length() < 2) throw new IOException("host is not well-formed: '" + host + "'");
|
|
final String path = request.url().getFile();
|
|
int port = request.url().getPort();
|
|
final boolean ssl = request.url().getProtocol().equals("https");
|
|
if (port < 0) port = (ssl) ? 443 : 80;
|
|
|
|
// check if url is in blacklist
|
|
final String hostlow = host.toLowerCase();
|
|
if (Switchboard.urlBlacklist != null && Switchboard.urlBlacklist.isListed(Blacklist.BLACKLIST_CRAWLER, hostlow, path)) {
|
|
throw new IOException("CRAWLER Rejecting URL '" + request.url().toString() + "'. URL is in blacklist.");
|
|
}
|
|
|
|
// take a file from the net
|
|
Response response = null;
|
|
|
|
// create a request header
|
|
final RequestHeader requestHeader = new RequestHeader();
|
|
requestHeader.put(HeaderFramework.USER_AGENT, crawlerUserAgent);
|
|
requestHeader.put(HeaderFramework.ACCEPT_LANGUAGE, DEFAULT_LANGUAGE);
|
|
requestHeader.put(HeaderFramework.ACCEPT_CHARSET, DEFAULT_CHARSET);
|
|
requestHeader.put(HeaderFramework.ACCEPT_ENCODING, DEFAULT_ENCODING);
|
|
|
|
// HTTP-Client
|
|
final Client client = new Client(20000, requestHeader);
|
|
|
|
ResponseContainer res = null;
|
|
try {
|
|
// send request
|
|
res = client.GET(request.url().toString(), Long.MAX_VALUE);
|
|
// FIXME: 30*-handling (bottom) is never reached
|
|
// we always get the final content because httpClient.followRedirects = true
|
|
|
|
if (res.getStatusCode() == 200 || res.getStatusCode() == 203) {
|
|
// the transfer is ok
|
|
|
|
// we write the new cache entry to file system directly
|
|
res.setAccountingName("CRAWLER");
|
|
final byte[] responseBody = res.getData();
|
|
|
|
// create a new cache entry
|
|
response = new Response(
|
|
request,
|
|
requestHeader,
|
|
res.getResponseHeader(),
|
|
res.getStatusLine(),
|
|
null,
|
|
responseBody
|
|
);
|
|
|
|
return response;
|
|
} else if (res.getStatusLine().startsWith("30")) {
|
|
if (res.getResponseHeader().containsKey(HeaderFramework.LOCATION)) {
|
|
// getting redirection URL
|
|
String redirectionUrlString = res.getResponseHeader().get(HeaderFramework.LOCATION);
|
|
redirectionUrlString = redirectionUrlString.trim();
|
|
|
|
if (redirectionUrlString.length() == 0) {
|
|
throw new IOException("CRAWLER Redirection of URL=" + request.url().toString() + " aborted. Location header is empty.");
|
|
}
|
|
|
|
// normalizing URL
|
|
final yacyURL redirectionUrl = yacyURL.newURL(request.url(), redirectionUrlString);
|
|
|
|
|
|
// if we are already doing a shutdown we don't need to retry crawling
|
|
if (Thread.currentThread().isInterrupted()) {
|
|
throw new IOException("CRAWLER Retry of URL=" + request.url().toString() + " aborted because of server shutdown.");
|
|
}
|
|
|
|
// retry crawling with new url
|
|
request.redirectURL(redirectionUrl);
|
|
return load(request, retryCount - 1);
|
|
}
|
|
} else {
|
|
// if the response has not the right response type then reject file
|
|
throw new IOException("REJECTED WRONG STATUS TYPE '" + res.getStatusLine() + "' for URL " + request.url().toString());
|
|
}
|
|
} finally {
|
|
if(res != null) {
|
|
// release connection
|
|
res.closeStream();
|
|
}
|
|
}
|
|
return response;
|
|
}
|
|
|
|
}
|