HttpFileDownload.java
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|---|---|---|
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phex.download.handler |
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Phex |
View: Reasons, Metrics, Source Code
These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
| Metric | Description | |
|---|---|---|
| EXEC_COMMENTS | Comments in executable code |  |
| LINE_COMMENT | Number of line comments | |
| EXITS | Procedure exits | |
| SIZE | Size of the file in bytes | |
| COMPARISONS | Number of comparison operators | |
| LOC | Lines of code | |
| UNIQUE_OPERANDS | Number of unique operands | |
| OPERANDS | Number of operands | |
| LOGICAL_LINES | Number of statements | |
| ELOC | Effective lines of code | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| PROGRAM_LENGTH | Halstead program length | |
| OPERATORS | Number of operators | |
| LINES | Number of lines in the source file | |
| CYCLOMATIC | Cyclomatic complexity | |
| BLOCKS | Number of blocks | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| JAVA0177 | JAVA0177 Variable declaration missing initializer | |
| RETURNS | Number of return points from functions | |
| UNIQUE_OPERATORS | Number of unique operators | |
| JAVA0076 | JAVA0076 Use of magic number | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| NEST_DEPTH | Maximum nesting depth | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0043 | JAVA0043 Inner class does not use outer class | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0287 | JAVA0287 Unnecessary null check | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0254 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| DECL_COMMENTS | Comments in declarations | |
| DOC_COMMENT | Number of javadoc comment lines | |
| JAVA0270 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/*
* PHEX - The pure-java Gnutella-servent.
* Copyright (C) 2001 - 2008 Phex Development Group
*
* 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
*
* --- SVN Information ---
* $Id: HttpFileDownload.java 4205 2008-06-18 09:49:16Z gregork $
*/
package phex.download.handler;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.StringTokenizer;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.httpclient.ChunkedInputStream;
import phex.common.AltLocContainer;
import phex.common.AlternateLocation;
import phex.common.URN;
import phex.common.address.AddressUtils;
import phex.common.address.DestAddress;
import phex.common.address.IpAddress;
import phex.common.address.MalformedDestAddressException;
import phex.common.log.NLogger;
import phex.download.DataDownloadScope;
import phex.download.DownloadEngine;
import phex.download.FileNotAvailableException;
import phex.download.HostBusyException;
import phex.download.MemoryFile;
import phex.download.RangeUnavailableException;
import phex.download.ReconnectException;
import phex.download.RemotelyQueuedException;
import phex.download.ThexVerificationData;
import phex.download.WrongHTTPHeaderException;
import phex.download.swarming.SWDownloadCandidate;
import phex.download.swarming.SWDownloadConstants;
import phex.download.swarming.SWDownloadFile;
import phex.download.swarming.SWDownloadSegment;
import phex.download.swarming.SWDownloadSet;
import phex.download.swarming.SWDownloadWorker;
import phex.download.swarming.SWDownloadCandidate.CandidateStatus;
import phex.host.UnusableHostException;
import phex.http.GnutellaHeaderNames;
import phex.http.GnutellaRequest;
import phex.http.HTTPCodes;
import phex.http.HTTPHeader;
import phex.http.HTTPHeaderNames;
import phex.http.HTTPMessageException;
import phex.http.HTTPProcessor;
import phex.http.HTTPRangeSet;
import phex.http.HTTPRequest;
import phex.http.HTTPResponse;
import phex.http.HTTPRetryAfter;
import phex.http.XQueueParameters;
import phex.io.buffer.ByteBuffer;
import phex.net.connection.Connection;
import phex.net.repres.PresentationManager;
import phex.prefs.core.DownloadPrefs;
import phex.prefs.core.NetworkPrefs;
import phex.prefs.core.UploadPrefs;
import phex.security.PhexSecurityManager;
import phex.servent.Servent;
import phex.utils.IOUtil;
import phex.utils.LengthLimitedInputStream;
public class HttpFileDownload extends AbstractHttpDownload
{
private static final int BUFFER_LENGTH = 16 * 1024;
private InputStream inStream;
private ContentRange replyContentRange;
private long replyContentLength;
private boolean isDownloadSuccessful;
public HttpFileDownload( DownloadEngine engine )
{
super( engine );
}
/**
* Performs download pre process operations.
* @throws DownloadHandlerException in case no segment is found to allocate.
*/
public void preProcess() throws DownloadHandlerException
{
SWDownloadSet downloadSet = downloadEngine.getDownloadSet();
SWDownloadSegment segment = downloadSet.allocateSegment( );
if ( segment == null )
{// no more segments found...
NLogger.debug( SWDownloadWorker.class, "No segment to allocate found.");
downloadSet.getCandidate().addToCandidateLog(
"No segment to allocate found." );
downloadSet.getCandidate().setStatus( CandidateStatus.WAITING );
throw new DownloadHandlerException( "No segment found to allocate." );
}
}
public void processHandshake()
throws IOException, UnusableHostException, HTTPMessageException
{
isDownloadSuccessful = false;
Connection connection = downloadEngine.getConnection();
SWDownloadSet downloadSet = downloadEngine.getDownloadSet();
Servent servent = downloadSet.getServent();
PhexSecurityManager securityService = servent.getSecurityService();
SWDownloadCandidate candidate = downloadSet.getCandidate();
SWDownloadFile downloadFile = downloadSet.getDownloadFile();
SWDownloadSegment segment = downloadSet.getDownloadSegment();
long downloadOffset = segment.getTransferStartPosition();
OutputStreamWriter writer = new OutputStreamWriter(
connection.getOutputStream() );
// reset to default input stream
inStream = connection.getInputStream();
String requestUrl = candidate.getDownloadRequestUrl();
HTTPRequest request = new HTTPRequest( "GET", requestUrl, true );
request.addHeader( new HTTPHeader( HTTPHeaderNames.HOST,
candidate.getHostAddress().getFullHostName() ) );
long segmentEndOffset = segment.getEnd();
if ( segmentEndOffset == -1 )
{// create header with open end
request.addHeader( new HTTPHeader( HTTPHeaderNames.RANGE,
"bytes=" + downloadOffset + "-" ) );
}
else
{
request.addHeader( new HTTPHeader( HTTPHeaderNames.RANGE,
"bytes=" + downloadOffset + "-" + segmentEndOffset ) );
}
request.addHeader( new HTTPHeader( GnutellaHeaderNames.X_QUEUE,
"0.1" ) );
// request a HTTP keep alive connection, needed for queuing to work.
request.addHeader( new HTTPHeader( HTTPHeaderNames.CONNECTION,
"Keep-Alive" ) );
if ( candidate.isG2FeatureAdded() )
{
request.addHeader( new HTTPHeader( "X-Features",
"g2/1.0" ) );
}
buildAltLocRequestHeader( downloadFile, candidate, request,
servent.getLocalAddress(), servent.isFirewalled() );
DestAddress localAdress = servent.getLocalAddress();
IpAddress myIp = localAdress.getIpAddress();
if ( !servent.isFirewalled() && ( myIp == null || !myIp.isSiteLocalIP() ) )
{
request.addHeader( new HTTPHeader( GnutellaHeaderNames.X_NODE,
localAdress.getFullHostName() ) );
if ( NetworkPrefs.AllowChatConnection.get().booleanValue() )
{
request.addHeader( new HTTPHeader( "Chat", localAdress.getFullHostName() ) );
}
}
String httpRequestStr = request.buildHTTPRequestString();
NLogger.debug( DownloadEngine.class,
"HTTP Request to: " + candidate.getHostAddress() + "\n" + httpRequestStr );
candidate.addToCandidateLog( "HTTP Request:\n" + httpRequestStr );
// write request...
writer.write( httpRequestStr );
writer.flush();
HTTPResponse response = HTTPProcessor.parseHTTPResponse( connection );
if ( NLogger.isDebugEnabled( DownloadEngine.class ) )
{
NLogger.debug( DownloadEngine.class,
"HTTP Response from: " + candidate.getHostAddress() + "\n"
+ response.buildHTTPResponseString() );
}
if ( DownloadPrefs.CandidateLogBufferSize.get().intValue() > 0 )
{
candidate.addToCandidateLog( "HTTP Response:\n"
+ response.buildHTTPResponseString() );
}
HTTPHeader header = response.getHeader( HTTPHeaderNames.SERVER );
if ( header != null )
{
candidate.setVendor( header.getValue() );
}
header = response.getHeader( HTTPHeaderNames.TRANSFER_ENCODING );
if ( header != null )
{
if ( header.getValue().equals("chunked") )
{
inStream = new ChunkedInputStream( connection.getInputStream() );
}
}
replyContentRange = null;
header = response.getHeader( HTTPHeaderNames.CONTENT_RANGE );
if ( header != null )
{
replyContentRange = parseContentRange( header.getValue() );
// startPos of -1 indicates '*' (free to choose)
if ( replyContentRange.startPos != -1 &&
replyContentRange.startPos != downloadOffset )
{
throw new IOException( "Invalid 'CONTENT-RANGE' start offset." );
}
}
replyContentLength = -1;
header = response.getHeader( HTTPHeaderNames.CONTENT_LENGTH );
if ( header != null )
{
try
{
replyContentLength = header.longValue();
}
catch ( NumberFormatException exp )
{ //unknown
}
}
header = response.getHeader( GnutellaHeaderNames.X_THEX_URI );
handleThexUriHeader( downloadFile, candidate, header );
List<HTTPHeader> contentURNHeaders = new ArrayList<HTTPHeader>();
header = response.getHeader( GnutellaHeaderNames.X_GNUTELLA_CONTENT_URN );
if ( header != null )
{
contentURNHeaders.add( header );
}
// Shareaza 1.8.10.4 send also a bitprint urn in multiple X-Content-URN headers!
HTTPHeader[] headers = response.getHeaders( GnutellaHeaderNames.X_CONTENT_URN );
CollectionUtils.addAll( contentURNHeaders, headers );
handleContentUrnHeaders( downloadFile, contentURNHeaders );
// check Limewire chat support header.
header = response.getHeader( GnutellaHeaderNames.CHAT );
if ( header != null )
{
candidate.setChatSupported( true );
}
// read out REMOTE-IP header... to update my IP
header = response.getHeader( GnutellaHeaderNames.REMOTE_IP );
if ( header != null )
{
byte[] remoteIP = AddressUtils.parseIP( header.getValue() );
if ( remoteIP != null )
{
IpAddress ip = new IpAddress( remoteIP );
DestAddress address = PresentationManager.getInstance().createHostAddress(ip, -1);
servent.updateLocalAddress( address );
}
}
int httpCode = response.getStatusCode();
// read available ranges
header = response.getHeader( GnutellaHeaderNames.X_AVAILABLE_RANGES );
if ( header != null )
{
HTTPRangeSet availableRanges =
HTTPRangeSet.parseHTTPRangeSet( header.getValue(), false );
if ( availableRanges == null )
{// failed to parse... give more detailed error report
NLogger.error( DownloadEngine.class,
"Failed to parse X-Available-Ranges in "
+ candidate.getVendor() + " request: "
+ response.buildHTTPResponseString() );
}
candidate.setAvailableRangeSet( availableRanges );
}
else if ( httpCode >= 200 && httpCode < 300
&& downloadFile.getTotalDataSize() != SWDownloadConstants.UNKNOWN_FILE_SIZE)
{// OK header and no available range header.. we assume candidate
// shares the whole file
candidate.setAvailableRangeSet( new HTTPRangeSet(
0, downloadFile.getTotalDataSize() - 1) );
}
URN downloadFileURN = downloadFile.getFileURN();
// collect alternate locations...
List<AlternateLocation> altLocList = new ArrayList<AlternateLocation>();
headers = response.getHeaders( GnutellaHeaderNames.ALT_LOC );
List<AlternateLocation> altLocTmpList = AltLocContainer.parseUriResAltLocFromHeaders( headers,
securityService );
altLocList.addAll( altLocTmpList );
headers = response.getHeaders( GnutellaHeaderNames.X_ALT_LOC );
altLocTmpList = AltLocContainer.parseUriResAltLocFromHeaders( headers,
securityService );
altLocList.addAll( altLocTmpList );
headers = response.getHeaders( GnutellaHeaderNames.X_ALT );
altLocTmpList = AltLocContainer.parseCompactIpAltLocFromHeaders( headers,
downloadFileURN, securityService );
altLocList.addAll( altLocTmpList );
// TODO1 huh?? dont we pare X-NALT????
Iterator<AlternateLocation> iterator = altLocList.iterator();
while( iterator.hasNext() )
{
downloadFile.addDownloadCandidate( iterator.next() );
}
// collect push proxies.
// first the old headers..
headers = response.getHeaders( "X-Pushproxies" );
handlePushProxyHeaders( candidate, headers, securityService );
headers = response.getHeaders( "X-Push-Proxies" );
handlePushProxyHeaders( candidate, headers, securityService );
// now the standard header
headers = response.getHeaders( GnutellaHeaderNames.X_PUSH_PROXY );
handlePushProxyHeaders( candidate, headers, securityService );
updateKeepAliveSupport( response );
if ( httpCode >= 200 && httpCode < 300 )
{// code accepted
// check if we can accept the urn...
if ( contentURNHeaders.size() == 0
&& requestUrl.startsWith(GnutellaRequest.GNUTELLA_URI_RES_PREFIX) )
{// we requested a download via /uri-res resource urn.
// we expect that the result contains a x-gnutella-content-urn
// or Shareaza X-Content-URN header.
throw new IOException(
"Response to uri-res request without valid Content-URN header." );
}
// check if we need and can update our file and segment size.
if ( downloadFile.getTotalDataSize() == SWDownloadConstants.UNKNOWN_FILE_SIZE )
{
// we have a file with an unknown data size. For aditional check assert
// certain parameters
assert( segment.getTotalDataSize() == -1 );
// Now verify if we have the great chance to update our file data!
if ( replyContentRange != null &&
replyContentRange.totalLength != SWDownloadConstants.UNKNOWN_FILE_SIZE )
{
downloadFile.setFileSize( replyContentRange.totalLength );
// we learned the file size. To allow normal segment use
// interrupt the download!
stopDownload();
throw new ReconnectException();
}
}
// connection successfully finished
NLogger.debug( DownloadEngine.class,
"HTTP Handshake successfull.");
return;
}
// check error type
else if ( httpCode == 503 )
{// 503 -> host is busy (this can also be returned when remotly queued)
header = response.getHeader( GnutellaHeaderNames.X_QUEUE );
XQueueParameters xQueueParameters = null;
if ( header != null )
{
xQueueParameters = XQueueParameters.parseXQueueParameters( header.getValue() );
}
// check for persistent connection (gtk-gnutella uses queuing with 'Connection: close')
if ( xQueueParameters != null && isKeepAliveSupported )
{
throw new RemotelyQueuedException( xQueueParameters );
}
else
{
header = response.getHeader( HTTPHeaderNames.RETRY_AFTER );
if ( header != null )
{
int delta = HTTPRetryAfter.parseDeltaInSeconds( header );
if ( delta > 0 )
{
throw new HostBusyException( delta );
}
}
throw new HostBusyException();
}
}
else if ( httpCode == HTTPCodes.HTTP_401_UNAUTHORIZED
|| httpCode == HTTPCodes.HTTP_403_FORBIDDEN )
{
if ( "Network Disabled".equals( response.getStatusReason() ) )
{
if ( candidate.isG2FeatureAdded() )
{
// already tried G2 but no success.. better give up and dont hammer..
throw new UnusableHostException( "Request Forbidden" );
}
else
{
// we have not tried G2 but we could..
candidate.setG2FeatureAdded( true );
throw new HostBusyException( 60 * 5 );
}
}
else
{
throw new UnusableHostException( "Request Forbidden" );
}
}
else if ( httpCode == 408 )
{
// 408 -> Time out. Try later?
throw new HostBusyException();
}
else if ( httpCode == 404 || httpCode == 410 )
{// 404: File not found / 410: Host not sharing
throw new FileNotAvailableException();
}
else if ( httpCode == 416 )
{// 416: Requested Range Unavailable
header = response.getHeader( HTTPHeaderNames.RETRY_AFTER );
if ( header != null )
{
int delta = HTTPRetryAfter.parseDeltaInSeconds( header );
if ( delta > 0 )
{
throw new RangeUnavailableException( delta );
}
}
throw new RangeUnavailableException();
}
else if ( httpCode == 500 )
{
throw new UnusableHostException( "Internal Server Error" );
}
else
{
throw new IOException( "Unknown HTTP code: " + httpCode );
}
}
public void processDownload() throws IOException
{
SWDownloadSet downloadSet = downloadEngine.getDownloadSet();
SWDownloadCandidate candidate = downloadSet.getCandidate();
SWDownloadFile downloadFile = downloadSet.getDownloadFile();
SWDownloadSegment segment = downloadSet.getDownloadSegment();
String snapshotOfSegment;
NLogger.debug( DownloadEngine.class, "Download Engine starts download.");
LengthLimitedInputStream downloadStream = null;
try
{
segment.downloadStartNotify();
snapshotOfSegment = segment.toString();
// determine the length to download, we start with the MAX
// which would cause a download until the stream ends.
long downloadLengthLeft = Long.MAX_VALUE;
// maybe we know the file size
if ( replyContentRange != null && replyContentRange.totalLength != -1 )
{
downloadLengthLeft = replyContentRange.totalLength;
}
// maybe we know a reply content length
if ( replyContentLength != -1 )
{
downloadLengthLeft = Math.min( replyContentLength, downloadLengthLeft );
}
// maybe the segment has a smaler length (usually not the case)
long segmentDataSizeLeft = segment.getTransferDataSizeLeft();
if ( segmentDataSizeLeft != -1 )
{
downloadLengthLeft = Math.min( segmentDataSizeLeft, downloadLengthLeft );
}
downloadStream = new LengthLimitedInputStream(
inStream, downloadLengthLeft );
MemoryFile memoryFile = downloadFile.getMemoryFile();
long fileOffset = segment.getStart() + segment.getTransferredDataSize();
long lengthDownloaded = segment.getTransferredDataSize();
int len;
byte[] buffer = new byte[BUFFER_LENGTH];
while( (len = downloadStream.read( buffer, 0, BUFFER_LENGTH )) > 0 )
{
if ( NLogger.isDebugEnabled( DownloadEngine.class ) )
{
NLogger.debug( DownloadEngine.class, "Reading in " + len + "bytes." );
candidate.addToCandidateLog( "Reading in " + len + "bytes." );
}
synchronized (segment)
{
long tmpCheckLength = lengthDownloaded + len;
if ( tmpCheckLength < segment.getTransferredDataSize() )
{
NLogger.error( DownloadEngine.class,
"TransferredDataSize would be going down! " +
" ll " + downloadLengthLeft + " l " + len + " ld "
+ lengthDownloaded + " gtds "
+ segment.getTransferredDataSize()
+ " seg: " + segment
+ " originally: " + snapshotOfSegment);
throw new IOException( "TransferredDataSize would be going down!" );
}
else if (segment.getTransferDataSize() > -1
&& tmpCheckLength > segment.getTransferDataSize())
{
NLogger.error( DownloadEngine.class,
"TransferredDataSize would be larger then segment! " +
" ll " + downloadLengthLeft + " l " + len + " ld "
+ lengthDownloaded + " gtds "
+ segment.getTransferredDataSize()
+ " seg: " + segment
+ " originally: " + snapshotOfSegment);
throw new IOException( "TransferredDataSize would be larger then segment!" );
}
// this will request buffers between 1KB and 16KB of length.
// don't release or clear directByteBuffer this will be done
// by MemoryFile and DownloadDataWriter
ByteBuffer byteBuffer = ByteBuffer.allocate( len );
byteBuffer.put( buffer, 0, len );
byteBuffer.flip();
DataDownloadScope dataScope = new DataDownloadScope( fileOffset,
fileOffset + len - 1, byteBuffer );
if ( NLogger.isDebugEnabled( DownloadEngine.class ) )
{
NLogger.debug( DownloadEngine.class, "Buffering " + len + "bytes." );
candidate.addToCandidateLog( "Buffering in " + len + "bytes." );
}
memoryFile.bufferDataScope(dataScope);
if ( NLogger.isDebugEnabled( DownloadEngine.class ) )
{
NLogger.debug( DownloadEngine.class, "Buffered " + len + "bytes." );
candidate.addToCandidateLog( "Buffered " + len + "bytes." );
}
fileOffset += len;
lengthDownloaded += len;
segment.setTransferredDataSize( lengthDownloaded );
candidate.incTotalDownloadSize( len );
// get transfer size since it might have changed in the meantime.
segmentDataSizeLeft = segment.getTransferDataSizeLeft();
if ( segmentDataSizeLeft != -1 )
{
downloadLengthLeft = Math.min( segmentDataSizeLeft, downloadLengthLeft );
downloadStream.setLengthLimit(downloadLengthLeft);
}
}
}
isDownloadSuccessful = true;
// if we successful downloaded and we still dont know the total file size,
// we can assume that the file was completly downloaded.
if ( downloadFile.getTotalDataSize() == SWDownloadConstants.UNKNOWN_FILE_SIZE )
{
// we have a file with an unknown data size. For aditional check assert
// certain parameters
assert( segment.getTotalDataSize() == -1 );
downloadFile.setFileSize( segment.getTransferredDataSize() );
}
}
finally
{// dont close managed file since it might be used by parallel threads.
segment.downloadStopNotify();
boolean isAcceptingNextSegment = isAcceptingNextRequest();
candidate.addToCandidateLog( "Is accepting next segment: " + isAcceptingNextSegment );
// this is for keep alive support...
if ( isAcceptingNextSegment && downloadStream != null )
{
// only need to close and consume left overs if we plan to
// continue using this connection.
downloadStream.close();
}
else
{
stopDownload();
}
}
}
public void postProcess()
{
// segment download completed, release segment
SWDownloadSet downloadSet = downloadEngine.getDownloadSet();
SWDownloadSegment downloadSegment = downloadSet.getDownloadSegment();
SWDownloadCandidate candidate = downloadSet.getCandidate();
if ( downloadSegment == null )
{
candidate.addToCandidateLog( "No download segment available." );
NLogger.debug( HttpFileDownload.class, "No download segment available." );
}
else
{
candidate.addToCandidateLog(
"Completed a segment which started at " + downloadSegment.getStart()
+ " and was downloaded at a rate of " + downloadSegment.getLongTermTransferRate() );
NLogger.debug( HttpFileDownload.class,
"Completed a segment which started at " + downloadSegment.getStart()
+ " and was downloaded at a rate of " + downloadSegment.getLongTermTransferRate());
}
NLogger.debug( HttpFileDownload.class,
"Releasing DownloadSegment: " + downloadSet.toString()
+ " - " + this);
downloadSet.releaseDownloadSegment();
}
public void stopDownload()
{
IOUtil.closeQuietly( inStream );
SWDownloadSegment segment = downloadEngine.getDownloadSet().getDownloadSegment();
if ( segment != null )
{
segment.downloadStopNotify();
}
}
/**
* Indicates whether the connection is keept alive and the next request can
* be send.
* @return true if the next request can be send on this connection
*/
public boolean isAcceptingNextRequest()
{
return isDownloadSuccessful && isKeepAliveSupported && replyContentLength != -1;
}
private static void handleContentUrnHeaders(SWDownloadFile downloadFile, List<HTTPHeader> headerList)
throws IOException
{
URN downloadFileURN = downloadFile.getFileURN();
if ( downloadFileURN != null )
{
for ( HTTPHeader urnHeader : headerList )
{
String contentURNStr = urnHeader.getValue();
// check if I can understand urn.
if ( URN.isValidURN( contentURNStr ) )
{
URN contentURN = new URN( contentURNStr );
if ( contentURN.isBitprintNid() )
{
ThexVerificationData thexVerificationData = downloadFile.getThexVerificationData();
String expectedRootHash = thexVerificationData.getRootHash();
if ( expectedRootHash != null &&
!expectedRootHash.equals( contentURN.getTigerTreeRootNss() ) )
{
throw new IOException(
"Required TTR and content URN TTR do not match:" +
expectedRootHash + " " + contentURN.getTigerTreeRootNss() );
}
}
if ( !downloadFileURN.equals( contentURN ) )
{
throw new IOException(
"Required URN and content URN do not match." );
}
}
}
}
}
private static void handleThexUriHeader(SWDownloadFile downloadFile,
SWDownloadCandidate candidate, HTTPHeader header)
{
if ( header == null )
{
return;
}
String value = header.getValue();
int idx = value.indexOf( ";" );
if ( idx < 0 )
{
return;
}
String thexUri = value.substring( 0, idx );
String root = value.substring( idx + 1 );
ThexVerificationData thexVerificationData = downloadFile.getThexVerificationData();
String expectedRootHash = thexVerificationData.getRootHash();
if ( expectedRootHash == null )
{// learn the hash for this download
thexVerificationData.setRootHash( root );
}
candidate.setThexUriRoot( thexUri, root );
}
private static void buildAltLocRequestHeader( SWDownloadFile downloadFile,
SWDownloadCandidate candidate, HTTPRequest request,
DestAddress serventAddress, boolean isFirewalled )
{
URN downloadFileURN = downloadFile.getFileURN();
if ( downloadFileURN == null )
{
return;
}
// add good alt loc http header
AltLocContainer altLocContainer = new AltLocContainer(
downloadFileURN );
// downloadFile.getGoodAltLocContainer() always returns a alt-loc container
// when downloadFileURN != null
altLocContainer.addContainer( downloadFile.getGoodAltLocContainer() );
// create a temp copy of the container and add local alt location
// if partial file sharing is active and we are not covered by a firewall
if ( !isFirewalled && UploadPrefs.SharePartialFiles.get().booleanValue() )
{
// add the local peer to the alt loc on creation, but only if its
// not a site local address.
if ( !serventAddress.isSiteLocalAddress() )
{
AlternateLocation newAltLoc = new AlternateLocation( serventAddress,
downloadFileURN );
altLocContainer.addAlternateLocation( newAltLoc );
}
}
HTTPHeader header = altLocContainer.getAltLocHTTPHeaderForAddress(
GnutellaHeaderNames.X_ALT, candidate.getHostAddress(),
candidate.getSendAltLocsSet() );
if ( header != null )
{
request.addHeader( header );
}
// add bad alt loc http header
// downloadFile.getBadAltLocContainer() always returns a alt-loc container
// when downloadFileURN != null
altLocContainer = downloadFile.getBadAltLocContainer();
header = altLocContainer.getAltLocHTTPHeaderForAddress(
GnutellaHeaderNames.X_NALT, candidate.getHostAddress(),
candidate.getSendAltLocsSet() );
if ( header != null )
{
request.addHeader( header );
}
}
private static void handlePushProxyHeaders( SWDownloadCandidate candidate,
HTTPHeader[] headers, PhexSecurityManager securityService )
{
if ( headers == null || headers.length == 0 )
{
return;
}
List<DestAddress> proxyList = new ArrayList<DestAddress>();
StringTokenizer tokenizer;
for ( int i = 0; i < headers.length; i++ )
{
HTTPHeader header = headers[i];
tokenizer = new StringTokenizer( header.getValue(), ",");
while( tokenizer.hasMoreTokens() )
{
String addressStr = tokenizer.nextToken().trim();
DestAddress address;
try
{
// includes security validation.
address = AddressUtils.parseAndValidateAddress(
addressStr, false, securityService );
proxyList.add( address );
}
catch (MalformedDestAddressException exp)
{
NLogger.debug( DownloadEngine.class,
"Malformed alt-location URL: " + exp.getMessage() );
}
}
}
if ( proxyList.size() == 0 )
{
return;
}
DestAddress[] pushProxyAddresses = new DestAddress[ proxyList.size() ];
proxyList.toArray( pushProxyAddresses );
candidate.setPushProxyAddresses( pushProxyAddresses );
}
/**
* We only care for the start offset since this is the importent point to
* begin the download from. Wherever it ends we try to download as long as we
* stay connected or until we reach our goal.
*
* Possible Content-Range Headers ( maybe not complete / header is upper
* cased by Phex )
*
* Content-range:bytes abc-def/xyz
* Content-range:bytes abc-def/*
* Content-range:bytes *\/xyz
* Content-range: bytes=abc-def/xyz (wrong but older Phex version and old clients use this)
*
* @param contentRangeLine the content range value
* @throws WrongHTTPHeaderException if the content range line has wrong format.
* @return the content range start offset.
*/
private ContentRange parseContentRange( String contentRangeLine )
throws WrongHTTPHeaderException
{
try
{
ContentRange range = new ContentRange();
String line = contentRangeLine.toLowerCase();
// skip over bytes plus extra char
int idx = line.indexOf( "bytes" ) + 6;
String rangeStr = line.substring( idx ).trim();
int slashIdx = rangeStr.indexOf('/');
String leadingPart = rangeStr.substring(0, slashIdx);
String trailingPart = rangeStr.substring( slashIdx + 1 );
// ?????/*
if ( trailingPart.charAt(0) == '*' )
{
range.totalLength = -1;
}
else // ?????/789
{
long fileLength = Long.parseLong(trailingPart);
range.totalLength = fileLength;
}
// */???
if ( leadingPart.charAt( 0 ) == '*' )
{
// startPos of -1 indicates '*' (free to choose)
range.startPos = -1;
range.endPos = range.totalLength;
}
else
{
// 123-456/???
int dashIdx = rangeStr.indexOf( '-' );
String startOffsetStr = leadingPart.substring( 0, dashIdx );
long startOffset = Long.parseLong( startOffsetStr );
String endOffsetStr = leadingPart.substring( dashIdx+1 );
long endOffset = Long.parseLong( endOffsetStr );
range.startPos = startOffset;
range.endPos = endOffset;
}
return range;
}
catch ( NumberFormatException exp )
{
NLogger.warn( DownloadEngine.class, exp, exp);
throw new WrongHTTPHeaderException(
"Number error while parsing content range: " + contentRangeLine );
}
catch ( IndexOutOfBoundsException exp )
{
throw new WrongHTTPHeaderException(
"Error while parsing content range: " + contentRangeLine );
}
}
private class ContentRange
{
/**
* startPos of -1 indicates '*' (free to choose)
*/
long startPos;
long endPos;
long totalLength;
}
}
The table below shows all metrics for HttpFileDownload.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 104.00 | Number of blocks | |
| BLOCK_COMMENT | 21.00 | Number of block comment lines | |
| COMMENTS | 113.00 | Comment lines | |
| COMMENT_DENSITY | 0.22 | Comment density | |
| COMPARISONS | 108.00 | Number of comparison operators | |
| CYCLOMATIC | 106.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 5.00 | Comments in declarations | |
| DOC_COMMENT | 29.00 | Number of javadoc comment lines | |
| ELOC | 503.00 | Effective lines of code | |
| EXEC_COMMENTS | 49.00 | Comments in executable code | |
| EXITS | 131.00 | Procedure exits | |
| FUNCTIONS | 12.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 88.13 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 67.00 | Interface complexity | |
| JAVA0001 | 0.00 | JAVA0001 Package name does not contain only lower case letters | |
| JAVA0002 | 1.00 | JAVA0002 Package name does not begin with a top level domain name or country code | |
| JAVA0003 | 0.00 | JAVA0003 Minimize use of on-demand (.*) imports | |
| JAVA0004 | 0.00 | JAVA0004 Unnecessary import from java.lang | |
| JAVA0005 | 0.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 0.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 0.00 | JAVA0008 Empty catch block | |
| JAVA0009 | 0.00 | JAVA0009 Protected member in final class | |
| JAVA0010 | 0.00 | JAVA0010 Non-instantiable class does not contain a non-private static member | |
| JAVA0011 | 0.00 | JAVA0011 Abstract class does not contain an abstract method | |
| JAVA0012 | 0.00 | JAVA0012 Non-constructor method with same name as declaring class | |
| JAVA0013 | 0.00 | JAVA0013 Non-blank final field is not static | |
| JAVA0014 | 0.00 | JAVA0014 Class with only static members has non-private constructor | |
| JAVA0015 | 0.00 | JAVA0015 Package class contains public nested type | |
| JAVA0016 | 0.00 | JAVA0016 Abstract class contains public constructor | |
| JAVA0017 | 0.00 | JAVA0017 Class name does not have required form | |
| JAVA0018 | 0.00 | JAVA0018 Method name does not have required form | |
| JAVA0019 | 0.00 | JAVA0019 Interface name does not have required form | |
| JAVA0020 | 0.00 | JAVA0020 Field name does not have required form | |
| JAVA0021 | 0.00 | JAVA0021 Interface method name does not have required form | |
| JAVA0022 | 0.00 | JAVA0022 Static final field name does not have required form | |
| JAVA0023 | 0.00 | JAVA0023 Empty finalize method | |
| JAVA0024 | 0.00 | JAVA0024 Empty class | |
| JAVA0025 | 0.00 | JAVA0025 Method override is empty | |
| JAVA0026 | 0.00 | JAVA0026 Finalize method with parameters | |
| JAVA0029 | 0.00 | JAVA0029 Private method not used | |
| JAVA0030 | 0.00 | JAVA0030 Private field not used | |
| JAVA0031 | 0.00 | JAVA0031 Case statement not properly closed | |
| JAVA0032 | 0.00 | JAVA0032 Switch statement missing default | |
| JAVA0033 | 0.00 | JAVA0033 default: not last case in switch statement | |
| JAVA0034 | 0.00 | JAVA0034 Missing braces in if statement | |
| JAVA0035 | 0.00 | JAVA0035 Missing braces in for statement | |
| JAVA0036 | 0.00 | JAVA0036 Missing braces in while statement | |
| JAVA0038 | 0.00 | JAVA0038 Non-case label in switch statement | |
| JAVA0039 | 0.00 | JAVA0039 Break statement with label | |
| JAVA0040 | 0.00 | JAVA0040 Switch statement contains N cases (maximum: M) | |
| JAVA0041 | 0.00 | JAVA0041 Nested synchronized block | |
| JAVA0042 | 0.00 | JAVA0042 Empty synchronized statement | |
| JAVA0043 | 1.00 | JAVA0043 Inner class does not use outer class | |
| JAVA0044 | 0.00 | JAVA0044 Serializable class with no instance variables | |
| JAVA0045 | 0.00 | JAVA0045 Serializable class with only transient fields | |
| JAVA0046 | 0.00 | JAVA0046 Name of class not derived from Exception ends with 'Exception' | |
| JAVA0047 | 0.00 | JAVA0047 Serializable class derives from invalid base class | |
| JAVA0048 | 0.00 | JAVA0048 Name of class derived from Exception does not end with 'Exception' | |
| JAVA0049 | 1.00 | JAVA0049 Nested block at depth N (maximum: M) | |
| JAVA0050 | 0.00 | JAVA0050 Class derives from java.lang.Error | |
| JAVA0051 | 0.00 | JAVA0051 Class derives from java.lang.RuntimeException | |
| JAVA0052 | 0.00 | JAVA0052 Class derives from java.lang.Throwable | |
| JAVA0053 | 0.00 | JAVA0053 Unused label | |
| JAVA0054 | 0.00 | JAVA0054 Inheritance depth N exceeds maximum M | |
| JAVA0055 | 0.00 | JAVA0055 Class should be interface | |
| JAVA0056 | 0.00 | JAVA0056 Unnecessary abstract modifier for interface or annotation | |
| JAVA0057 | 0.00 | JAVA0057 Unnecessary default constructor | |
| JAVA0058 | 0.00 | JAVA0058 Constructor calls super() | |
| JAVA0059 | 0.00 | JAVA0059 Method override only calls super() | |
| JAVA0061 | 0.00 | JAVA0061 Inaccessible member in anonymous class | |
| JAVA0062 | 0.00 | JAVA0062 Public class missing public member or protected constructor | |
| JAVA0063 | 0.00 | JAVA0063 Identifier name should not contain '$' | |
| JAVA0064 | 0.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 4.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 0.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 1.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 0.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 0.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 0.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 0.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 0.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 0.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 0.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 1.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 1.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 0.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 0.00 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0131 | 0.00 | JAVA0131 Compatible method does not override base | |
| JAVA0132 | 0.00 | JAVA0132 Method overload with compatible signature | |
| JAVA0133 | 0.00 | JAVA0133 Non-synchronized method overrides synchronized method | |
| JAVA0135 | 0.00 | JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method' | |
| JAVA0136 | 0.00 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0137 | 1.00 | JAVA0137 Non-abstract class missing constructor | |
| JAVA0138 | 0.00 | JAVA0138 N parameters defined for method (maximum: M) | |
| JAVA0139 | 0.00 | JAVA0139 Definition of main other than public static void main(java.lang.String[]) | |
| JAVA0141 | 0.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 0.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 0.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 1.00 | JAVA0145 Tab character used in source file | |
| JAVA0150 | 0.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 0.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 0.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 0.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 4.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 0.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 0.00 | JAVA0234 Class is Serializable but does not define serialVersionUID | |
| JAVA0235 | 0.00 | JAVA0235 Class defines serialVersionUID but does not implement Serializable | |
| JAVA0236 | 0.00 | JAVA0236 Attempt to clone an object which does not implement Cloneable | |
| JAVA0237 | 0.00 | JAVA0237 Class implements Cloneable but does not have public clone method | |
| JAVA0238 | 0.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 1.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 0.00 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0257 | 0.00 | JAVA0257 Use of 'Constant Interface' anti-pattern | |
| JAVA0258 | 0.00 | JAVA0258 Implement Iterable for foreach compatibility | |
| JAVA0259 | 0.00 | JAVA0259 Return of collection/array field | |
| JAVA0260 | 0.00 | JAVA0260 Use 'enum' instead of Enumerated Type pattern | |
| JAVA0261 | 0.00 | JAVA0261 Use specialized Enum collection types | |
| JAVA0262 | 0.00 | JAVA0262 Use of char in integer context | |
| JAVA0263 | 0.00 | JAVA0263 Long literal ends with 'l' instead of 'L' | |
| JAVA0264 | 0.00 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0265 | 0.00 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0266 | 0.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 0.00 | JAVA0267 Use of System.err | |
| JAVA0269 | 0.00 | JAVA0269 Contents of StringBuffer never used | |
| JAVA0270 | 1.00 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0271 | 0.00 | JAVA0271 Minimize use of on-demand (.*) static imports | |
| JAVA0272 | 0.00 | JAVA0272 Thread.run() called | |
| JAVA0273 | 0.00 | JAVA0273 Non-final derivative of Thread calls start() in constructor | |
| JAVA0274 | 0.00 | JAVA0274 Serializable class has a synchronized readObject() | |
| JAVA0275 | 0.00 | JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods | |
| JAVA0276 | 0.00 | JAVA0276 Unnecessary use of String constructor | |
| JAVA0277 | 0.00 | JAVA0277 Iterator.next() implementation does not throw NoSuchElementException | |
| JAVA0278 | 0.00 | JAVA0278 Unnecessary use of Boolean constructor | |
| JAVA0279 | 0.00 | JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method | |
| JAVA0280 | 0.00 | JAVA0280 IllegalMonitorStateException caught | |
| JAVA0281 | 0.00 | JAVA0281 Iterator.next() not called in loop | |
| JAVA0282 | 0.00 | JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext() | |
| JAVA0283 | 0.00 | JAVA0283 Control variable not updated in loop body | |
| JAVA0284 | 0.00 | JAVA0284 Explicit garbage collection | |
| JAVA0285 | 0.00 | JAVA0285 Dereference of potentially null variable | |
| JAVA0286 | 0.00 | JAVA0286 Dereference of null variable | |
| JAVA0287 | 1.00 | JAVA0287 Unnecessary null check | |
| JAVA0288 | 0.00 | JAVA0288 Inconsistent null check | |
| LINES | 889.00 | Number of lines in the source file | |
| LINE_COMMENT | 63.00 | Number of line comments | |
| LOC | 703.00 | Lines of code | |
| LOGICAL_LINES | 316.00 | Number of statements | |
| LOOPS | 4.00 | Number of loops | |
| NEST_DEPTH | 6.00 | Maximum nesting depth | |
| OPERANDS | 1471.00 | Number of operands | |
| OPERATORS | 2604.00 | Number of operators | |
| PARAMS | 15.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 4075.00 | Halstead program length | |
| PROGRAM_VOCAB | 514.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 52.00 | Number of return points from functions | |
| SIZE | 37610.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 459.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 55.00 | Number of unique operators | |
| WHITESPACE | 73.00 | Number of whitespace lines | |