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added configuration to switch off redirection following in crawler

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This commit is contained in:
Michael Peter Christen 2012-05-15 12:25:46 +02:00
parent 2717c1b749
commit e7e381d110
3 changed files with 47 additions and 37 deletions
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1
defaults/yacy.init
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@ -698,6 +698,7 @@ crawler.http.acceptEncoding=gzip
crawler.http.acceptLanguage=en-us,en;q=0.5
crawler.http.acceptCharset=ISO-8859-1,utf-8;q=0.7,*;q=0.7
crawler.http.maxFileSize=10485760
crawler.http.FollowRedirects=true;
# ftp crawler specific settings; size in bytes
crawler.ftp.maxFileSize=10485760

82
source/de/anomic/crawler/retrieval/HTTPLoader.java
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@ -38,6 +38,7 @@ import net.yacy.kelondro.io.ByteCount;
import net.yacy.kelondro.logging.Log;
import net.yacy.repository.Blacklist;
import net.yacy.search.Switchboard;
import net.yacy.search.SwitchboardConstants;
import net.yacy.search.index.Segments;
import de.anomic.crawler.CrawlProfile;
import de.anomic.crawler.Latency;
@ -127,13 +128,15 @@ public final class HTTPLoader {
client.setRedirecting(false); // we want to handle redirection ourselves, so we don't index pages twice
client.setTimout(this.socketTimeout);
client.setHeader(requestHeader.entrySet());
// send request
final byte[] responseBody = client.GETbytes(url, maxFileSize);
final ResponseHeader header = new ResponseHeader(client.getHttpResponse().getAllHeaders());
final int code = client.getHttpResponse().getStatusLine().getStatusCode();
if (code > 299 && code < 310) {
// redirection (content may be empty)
// send request
final byte[] responseBody = client.GETbytes(url, maxFileSize);
final ResponseHeader header = new ResponseHeader(client.getHttpResponse().getAllHeaders());
final int code = client.getHttpResponse().getStatusLine().getStatusCode();
if (code > 299 && code < 310) {
// redirection (content may be empty)
if (this.sb.getConfigBool(SwitchboardConstants.CRAWLER_FOLLOW_REDIRECTS, true)) {
if (header.containsKey(HeaderFramework.LOCATION)) {
// getting redirection URL
String redirectionUrlString = header.get(HeaderFramework.LOCATION);
@ -172,40 +175,45 @@ public final class HTTPLoader {
this.sb.crawlQueues.errorURL.push(request, this.sb.peers.mySeed().hash.getBytes(), new Date(), 1, FailCategory.TEMPORARY_NETWORK_FAILURE, "no redirection url provided", code);
throw new IOException("REJECTED EMTPY REDIRECTION '" + client.getHttpResponse().getStatusLine() + "' for URL " + request.url().toString());
}
} else if (responseBody == null) {
// no response, reject file
this.sb.crawlQueues.errorURL.push(request, this.sb.peers.mySeed().hash.getBytes(), new Date(), 1, FailCategory.TEMPORARY_NETWORK_FAILURE, "no response body", code);
throw new IOException("REJECTED EMPTY RESPONSE BODY '" + client.getHttpResponse().getStatusLine() + "' for URL " + request.url().toString());
} else if (code == 200 || code == 203) {
// the transfer is ok
} else {
// we don't want to follow redirects
this.sb.crawlQueues.errorURL.push(request, this.sb.peers.mySeed().hash.getBytes(), new Date(), 1, FailCategory.FINAL_PROCESS_CONTEXT, "redirection not wanted", code);
throw new IOException("REJECTED UNWANTED REDIRECTION '" + client.getHttpResponse().getStatusLine() + "' for URL " + request.url().toString());
}
} else if (responseBody == null) {
// no response, reject file
this.sb.crawlQueues.errorURL.push(request, this.sb.peers.mySeed().hash.getBytes(), new Date(), 1, FailCategory.TEMPORARY_NETWORK_FAILURE, "no response body", code);
throw new IOException("REJECTED EMPTY RESPONSE BODY '" + client.getHttpResponse().getStatusLine() + "' for URL " + request.url().toString());
} else if (code == 200 || code == 203) {
// the transfer is ok
// we write the new cache entry to file system directly
final long contentLength = responseBody.length;
ByteCount.addAccountCount(ByteCount.CRAWLER, contentLength);
// we write the new cache entry to file system directly
final long contentLength = responseBody.length;
ByteCount.addAccountCount(ByteCount.CRAWLER, contentLength);
// check length again in case it was not possible to get the length before loading
if (maxFileSize > 0 && contentLength > maxFileSize) {
this.sb.crawlQueues.errorURL.push(request, this.sb.peers.mySeed().hash.getBytes(), new Date(), 1, FailCategory.FINAL_PROCESS_CONTEXT, "file size limit exceeded", code);
throw new IOException("REJECTED URL " + request.url() + " because file size '" + contentLength + "' exceeds max filesize limit of " + maxFileSize + " bytes. (GET)");
}
// create a new cache entry
final CrawlProfile profile = this.sb.crawler.getActive(request.profileHandle().getBytes());
response = new Response(
request,
requestHeader,
header,
Integer.toString(code),
profile,
responseBody
);
return response;
} else {
// if the response has not the right response type then reject file
this.sb.crawlQueues.errorURL.push(request, this.sb.peers.mySeed().hash.getBytes(), new Date(), 1, FailCategory.TEMPORARY_NETWORK_FAILURE, "wrong http status code", code);
throw new IOException("REJECTED WRONG STATUS TYPE '" + client.getHttpResponse().getStatusLine() + "' for URL " + request.url().toString());
// check length again in case it was not possible to get the length before loading
if (maxFileSize > 0 && contentLength > maxFileSize) {
this.sb.crawlQueues.errorURL.push(request, this.sb.peers.mySeed().hash.getBytes(), new Date(), 1, FailCategory.FINAL_PROCESS_CONTEXT, "file size limit exceeded", code);
throw new IOException("REJECTED URL " + request.url() + " because file size '" + contentLength + "' exceeds max filesize limit of " + maxFileSize + " bytes. (GET)");
}
// create a new cache entry
final CrawlProfile profile = this.sb.crawler.getActive(request.profileHandle().getBytes());
response = new Response(
request,
requestHeader,
header,
Integer.toString(code),
profile,
responseBody
);
return response;
} else {
// if the response has not the right response type then reject file
this.sb.crawlQueues.errorURL.push(request, this.sb.peers.mySeed().hash.getBytes(), new Date(), 1, FailCategory.TEMPORARY_NETWORK_FAILURE, "wrong http status code", code);
throw new IOException("REJECTED WRONG STATUS TYPE '" + client.getHttpResponse().getStatusLine() + "' for URL " + request.url().toString());
}
}
public static Response load(final Request request) throws IOException {

1
source/net/yacy/search/SwitchboardConstants.java
View File

@ -296,6 +296,7 @@ public final class SwitchboardConstants {
* <p>Name of the setting how many active crawler-threads may maximal be running on the same time</p>
*/
public static final String CRAWLER_THREADS_ACTIVE_MAX = "crawler.MaxActiveThreads";
public static final String CRAWLER_FOLLOW_REDIRECTS = "crawler.http.FollowRedirects";
public static final String YACY_MODE_DEBUG = "yacyDebugMode";
/**