org.tinymediamanager.scraper.kodi.KodiScraperParser Maven / Gradle / Ivy
/*
* Copyright 2012 - 2016 Manuel Laggner
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.tinymediamanager.scraper.kodi;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.text.translate.EntityArrays;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
/**
* This class parses the Kodi scraper and extracts the functions
*
* @author Manuel Laggner, Myron Boyle
*/
class KodiScraperParser {
private static final Logger LOGGER = LoggerFactory.getLogger(KodiScraperParser.class);
public KodiScraper parseScraper(KodiScraper scraper, List common) throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder parser = factory.newDocumentBuilder();
File scraperFile = new File(scraper.getFolder(), scraper.getScraperXml());
String xmlFile = FileUtils.readFileToString(scraperFile, "UTF-8");
xmlFile = KodiUtil.fixXmlHeader(xmlFile);
Document xml;
try {
InputStream stream = new ByteArrayInputStream(xmlFile.getBytes(StandardCharsets.UTF_8));
xml = parser.parse(stream);
}
catch (SAXException e) {
LOGGER.warn("Error parsing " + scraperFile + " - trying fallback");
// eg FilmAffinity.com scraper
// replace all known entities with their unicode notation
// this fixes the "entity 'Iacute' was referenced, but not declared" parsing problems, since we do not have to add doctype entity declarations
// might replace too much; so this is only a fallback
for (String[] ent : EntityArrays.ISO8859_1_UNESCAPE()) {
xmlFile = xmlFile.replace(ent[0], ent[1]);
}
InputStream stream = new ByteArrayInputStream(xmlFile.getBytes(StandardCharsets.UTF_8));
xml = parser.parse(stream);
}
Element docEl = xml.getDocumentElement();
NodeList nl = docEl.getChildNodes();
for (int i = 0; i < nl.getLength(); i++) {
Node n = nl.item(i);
if (n.getNodeType() == Node.ELEMENT_NODE) {
Element el = (Element) n;
ScraperFunction func = new ScraperFunction();
func.setName(el.getNodeName());
func.setClearBuffers(parseBoolean(el.getAttribute("clearbuffers"), true));
func.setAppendBuffer(parseAppendBuffer(el.getAttribute("dest")));
func.setDest(parseInt(el.getAttribute("dest")));
scraper.addFunction(func);
// functions contain regexp expressions, so let's get those.
processRegexps(func, el);
}
}
// get all common scraper functions
readScraperFunctions(scraper, common);
return scraper;
}
private boolean parseAppendBuffer(String attribute) {
if (attribute == null)
return false;
if (attribute.trim().endsWith("+"))
return true;
return false;
}
private void processRegexps(RegExpContainer container, Element el) {
NodeList regEls = el.getChildNodes();
int regElsLen = regEls.getLength();
for (int k = 0; k < regElsLen; k++) {
Node nn = regEls.item(k);
if ("RegExp".equals(nn.getNodeName())) {
Element expEl = (Element) nn;
RegExp regexp = new RegExp();
regexp.setInput(expEl.getAttribute("input"));
regexp.setOutput(expEl.getAttribute("output"));
regexp.setAppendBuffer(parseAppendBuffer(expEl.getAttribute("dest")));
regexp.setDest(parseInt(expEl.getAttribute("dest")));
regexp.setConditional(expEl.getAttribute("conditional"));
container.addRegExp(regexp);
processRegexps(regexp, (Element) nn);
}
else if ("expression".equals(nn.getNodeName())) {
Element expEl = (Element) nn;
try {
RegExp regexp = (RegExp) container; // cannot cast - exception see below
Expression exp = new Expression();
exp.setExpression(nn.getTextContent());
exp.setNoClean(expEl.getAttribute("noclean"));
exp.setRepeat(parseBoolean(expEl.getAttribute("repeat"), false));
exp.setClear(parseBoolean(expEl.getAttribute("clear"), false));
regexp.setExpression(exp);
}
catch (Exception e) {
LOGGER.warn("unparseable expression! " + container);
// happens here (kino.de) - the last empty expression.
// maybe no RegExp around?
//
//
//
// <url>([^<]*)</url>
//
//
}
}
else {
// skip nodest that we don't know about
// System.out.println("Skipping Node: " + nn);
}
}
}
private int parseInt(String attribute) {
if (attribute == null || attribute.trim().length() == 0)
return 0;
if (attribute.endsWith("+")) {
attribute = attribute.substring(0, attribute.length() - 1);
}
return Integer.parseInt(attribute);
}
private boolean parseBoolean(String attribute, boolean defaultNull) {
if (attribute == null || attribute.trim().length() == 0)
return defaultNull;
if ("yes".equalsIgnoreCase(attribute))
return true;
if ("no".equalsIgnoreCase(attribute))
return false;
return Boolean.parseBoolean(attribute);
}
private void readScraperFunctions(KodiScraper scraper, List common) {
for (File file : common) {
// System.out.println("parsing common file: " + file);
try {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder parser = factory.newDocumentBuilder();
Document xml = parser.parse(file);
Element docEl = xml.getDocumentElement();
// only process xml files with scraperfunctions
if ("scraperfunctions".equals(docEl.getNodeName())) {
NodeList nl = docEl.getChildNodes();
// extract all scraperfunctions
for (int i = 0; i < nl.getLength(); i++) {
Node n = nl.item(i);
if (n.getNodeType() == Node.ELEMENT_NODE) {
Element el = (Element) n;
ScraperFunction func = new ScraperFunction();
func.setName(el.getNodeName());
func.setClearBuffers(parseBoolean(el.getAttribute("clearbuffers"), true));
func.setAppendBuffer(parseAppendBuffer(el.getAttribute("dest")));
func.setDest(parseInt(el.getAttribute("dest")));
scraper.addFunction(func);
// functions contain regexp expressions, so let's get those.
processRegexps(func, el);
}
}
}
}
catch (Exception e) {
LOGGER.error("problem parsing scraper function", e);
}
}
}
}