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*) adding first version of postscript parser

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git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@3535 6c8d7289-2bf4-0310-a012-ef5d649a1542
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theli 18 years ago
parent def0d6124e
commit 24ea4ca631
2 changed files with 352 additions and 0 deletions
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45
source/de/anomic/plasma/parser/ps/build.xml
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<?xml version="1.0"?>
<project name="YACY - psParser" default="dist">
<description>A class to parse ps files</description>
<property name="parserShortName" value="ps"/>
<property name="parserVersion" value="0.1"/>
<property name="parserLongName" value="yacyContentParser_${parserShortName}"/>
<property name="parserArchive" location="${release}/${parserLongName}_${parserVersion}.tgz"/>
<target name="compile">
<javac srcdir="${src}/de/anomic/plasma/parser/${parserShortName}" destdir="${build}" source="${javacSource}" target="${javacTarget}" debug="true" debuglevel="lines,vars,source">
<classpath>
<pathelement location="${build}" />
</classpath>
</javac>
</target>
<target name="zip" depends="compile">
<tar destfile="${parserArchive}" compression="gzip">
<tarfileset dir="${src}/de/anomic/plasma/parser/${parserShortName}"
prefix="${releaseDir}/source/de/anomic/plasma/parser/${parserShortName}"
dirmode="755" mode="644"/>
<tarfileset dir="${build}/de/anomic/plasma/parser/${parserShortName}"
prefix="${releaseDir}/classes/de/anomic/plasma/parser/${parserShortName}"
dirmode="755" mode="644"/>
</tar>
</target>
<target name="copy" depends="compile">
<copy todir="${release}/source/de/anomic/plasma/parser/${parserShortName}">
<fileset dir="${src}/de/anomic/plasma/parser/${parserShortName}" includes="**/*"/>
</copy>
<copy todir="${release}/classes/de/anomic/plasma/parser/${parserShortName}">
<fileset dir="${build}/de/anomic/plasma/parser/${parserShortName}" includes="**/*"/>
</copy>
</target>
<target name="dist" depends="compile,zip" description="Compile and zip the parser"/>
</project>

307
source/de/anomic/plasma/parser/ps/psParser.java
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//psParser.java
//------------------------
//part of YaCy
//(C) by Michael Peter Christen; mc@anomic.de
//first published on http://www.anomic.de
//Frankfurt, Germany, 2007
//
//this file is contributed by Martin Thelian
//last major change: 15.09.2005
//
//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.parser.ps;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Hashtable;
import de.anomic.net.URL;
import de.anomic.plasma.plasmaParserDocument;
import de.anomic.plasma.parser.AbstractParser;
import de.anomic.plasma.parser.Parser;
import de.anomic.plasma.parser.ParserException;
import de.anomic.server.serverFileUtils;
public class psParser extends AbstractParser implements Parser {
/**
* a list of mime types that are supported by this parser class
* @see #getSupportedMimeTypes()
*/
public static final Hashtable SUPPORTED_MIME_TYPES = new Hashtable();
static {
SUPPORTED_MIME_TYPES.put("application/postscript","ps");
SUPPORTED_MIME_TYPES.put("text/postscript","ps");
}
/**
* a list of library names that are needed by this parser
* @see Parser#getLibxDependences()
*/
private static final String[] LIBX_DEPENDENCIES = new String[] {};
private static Object modeScan = new Object();
private static boolean modeScanDone = false;
private static String parserMode = "java";
public psParser() {
super(LIBX_DEPENDENCIES);
this.parserName = "PostScript Document Parser";
if (!modeScanDone) synchronized (modeScan) {
if (testForPs2Ascii()) parserMode = "ps2ascii";
else parserMode = "java";
modeScanDone = true;
}
}
public Hashtable getSupportedMimeTypes() {
return SUPPORTED_MIME_TYPES;
}
public boolean testForPs2Ascii() {
try {
String procOutputLine = null;
StringBuffer procOutput = new StringBuffer();
Process ps2asciiProc = Runtime.getRuntime().exec(new String[]{"ps2ascii", "--version"});
BufferedReader stdOut = new BufferedReader(new InputStreamReader(ps2asciiProc.getInputStream()));
while ((procOutputLine = stdOut.readLine()) != null) {
procOutput.append(procOutputLine).append(", ");
}
int returnCode = ps2asciiProc.waitFor();
return (returnCode == 0);
} catch (Exception e) {
this.theLogger.logInfo("ps2ascii not found. Switching to java parser mode.");
return false;
}
}
public plasmaParserDocument parse(URL location, String mimeType, String charset, File sourceFile) throws ParserException, InterruptedException {
File outputFile = null;
try {
// creating a temp file for the output
outputFile = super.createTempFile("ascii.txt");
// decide with parser mode to use
if (parserMode.equals("ps2ascii")) {
parseUsingPS2ascii(sourceFile,outputFile);
} else {
parseUsingJava(sourceFile,outputFile);
}
// return result
plasmaParserDocument theDoc = new plasmaParserDocument(
location,
mimeType,
"UTF-8",
null,
null,
"",
null,
null,
outputFile,
null,
null);
return theDoc;
} catch (Exception e) {
if (e instanceof InterruptedException) throw (InterruptedException) e;
if (e instanceof ParserException) throw (ParserException) e;
// delete temp file
if (outputFile != null) outputFile.delete();
// throw exception
throw new ParserException("Unexpected error while parsing ps file. " + e.getMessage(),location);
}
}
public void parseUsingJava (File inputFile, File outputFile) throws Exception {
BufferedReader reader = null;
BufferedWriter writer = null;
try {
reader = new BufferedReader(new FileReader(inputFile));
writer = new BufferedWriter(new FileWriter(outputFile));
String versionInfoLine = reader.readLine();
String version = versionInfoLine.substring(versionInfoLine.length()-3);
int ichar = 0;
boolean isComment = false;
boolean isText = false;
if (version.startsWith("2")) {
boolean isConnector = false;
while ((ichar = reader.read()) > 0) {
if (isConnector) {
if (ichar < 108) {
writer.write(' ');
}
isConnector = false;
} else if (ichar == '%') {
isComment = true;
} else if (ichar == '\n' && isComment) {
isComment = false;
} else if (ichar == ')' && isText ) {
isConnector = true;
isText = false;
} else if (isText) {
writer.write((char)ichar);
} else if (ichar == '(' && !isComment) {
isText = true;
}
}
} else if (version.startsWith("3")) {
StringBuffer stmt = new StringBuffer();
boolean isBMP = false;
boolean isStore = false;
int store = 0;
while ((ichar = reader.read()) > 0) {
if (ichar == '%') {
isComment = true;
} else if (ichar == '\n' && isComment){
isComment = false;
} else if (ichar == ')' && isText ) {
isText = false;
} else if (isText && !isBMP) {
writer.write((char)ichar);
} else if (ichar == '(' && !isComment && !isBMP) {
isText = true;
} else if (isStore) {
if (store == 9 || ichar == ' ' || ichar == 10) {
isStore = false;
store = 0;
if (stmt.toString().equals("BEGINBITM")) {
isText = false;
isBMP = true;
} else if (stmt.toString().equals("ENDBITMAP")) {
isBMP = false;
}
stmt.delete(0,stmt.length());
}
else {
stmt.append((char)ichar);
store++;
}
} else if (!isComment && !isStore && (ichar == 66 || ichar == 69)) {
isStore = true;
stmt.append((char)ichar);
store++;
}
}
} else {
throw new Exception("Unsupported Postscript version '" + version + "'.");
}
} finally {
if (reader != null) try { reader.close(); } catch (Exception e) {/* */}
if (writer != null) try { writer.close(); } catch (Exception e) {/* */}
}
}
/**
* This function requires the ghostscript-library
* @param inputFile
* @param outputFile
* @throws Exception
*/
private void parseUsingPS2ascii(File inputFile, File outputFile) throws Exception {
int execCode = 0;
StringBuffer procErr = null;
try {
String procOutputLine = null;
StringBuffer procOut = new StringBuffer();
procErr = new StringBuffer();
Process ps2asciiProc = Runtime.getRuntime().exec(new String[]{"ps2ascii", inputFile.getAbsolutePath(),outputFile.getAbsolutePath()});
BufferedReader stdOut = new BufferedReader(new InputStreamReader(ps2asciiProc.getInputStream()));
BufferedReader stdErr = new BufferedReader(new InputStreamReader(ps2asciiProc.getErrorStream()));
while ((procOutputLine = stdOut.readLine()) != null) {
procOut.append(procOutputLine);
}
while ((procOutputLine = stdErr.readLine()) != null) {
procErr.append(procOutputLine);
}
execCode = ps2asciiProc.waitFor();
} catch (Exception e) {
String errorMsg = "Unable to convert ps to ascii. " + e.getMessage();
this.theLogger.logSevere(errorMsg);
throw new Exception(errorMsg);
}
if (execCode != 0) throw new Exception("Unable to convert ps to ascii. ps2ascii returned statuscode " + execCode + "\n" + procErr.toString());
}
public void reset() {
// Nothing todo here at the moment
super.reset();
}
public plasmaParserDocument parse(URL location, String mimeType, String charset, InputStream source) throws ParserException, InterruptedException {
File tempFile = null;
try {
// creating a tempfile
tempFile = super.createTempFile("temp.ps");
tempFile.deleteOnExit();
// copying inputstream into file
serverFileUtils.copy(source,tempFile);
// parsing the file
return parse(location,mimeType,charset,tempFile);
} catch (Exception e) {
if (e instanceof InterruptedException) throw (InterruptedException) e;
if (e instanceof ParserException) throw (ParserException) e;
throw new ParserException("Unable to parse the ps file. " + e.getMessage(),location, e);
} finally {
if (tempFile != null) try{ tempFile.delete(); }catch(Exception e) {/* */}
}
}
}
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