package de.danoeh.antennapod.core.syndication.handler;
import android.util.Log;
import org.apache.commons.io.input.XmlStreamReader;
import org.jsoup.Jsoup;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.Reader;
import de.danoeh.antennapod.core.feed.Feed;
/** Gets the type of a specific feed by reading the root element. */
public class TypeGetter {
private static final String TAG = "TypeGetter";
public enum Type {
RSS20, RSS091, ATOM, INVALID
}
private static final String ATOM_ROOT = "feed";
private static final String RSS_ROOT = "rss";
public Type getType(Feed feed) throws UnsupportedFeedtypeException {
XmlPullParserFactory factory;
if (feed.getFile_url() != null) {
Reader reader = null;
try {
factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
XmlPullParser xpp = factory.newPullParser();
reader = createReader(feed);
xpp.setInput(reader);
int eventType = xpp.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG) {
String tag = xpp.getName();
switch (tag) {
case ATOM_ROOT:
feed.setType(Feed.TYPE_ATOM1);
Log.d(TAG, "Recognized type Atom");
return Type.ATOM;
case RSS_ROOT:
String strVersion = xpp.getAttributeValue(null, "version");
if (strVersion != null) {
if (strVersion.equals("2.0")) {
feed.setType(Feed.TYPE_RSS2);
Log.d(TAG, "Recognized type RSS 2.0");
return Type.RSS20;
} else if (strVersion.equals("0.91")
|| strVersion.equals("0.92")) {
Log.d(TAG, "Recognized type RSS 0.91/0.92");
return Type.RSS091;
}
}
throw new UnsupportedFeedtypeException(Type.INVALID);
default:
Log.d(TAG, "Type is invalid");
throw new UnsupportedFeedtypeException(Type.INVALID, tag);
}
} else {
eventType = xpp.next();
}
}
} catch (XmlPullParserException e) {
e.printStackTrace();
// XML document might actually be a HTML document -> try to parse as HTML
String rootElement = null;
try {
if (Jsoup.parse(new File(feed.getFile_url()), null) != null) {
rootElement = "html";
}
} catch (IOException e1) {
e1.printStackTrace();
} finally {
throw new UnsupportedFeedtypeException(Type.INVALID, rootElement);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if(reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
Log.d(TAG, "Type is invalid");
throw new UnsupportedFeedtypeException(Type.INVALID);
}
private Reader createReader(Feed feed) {
Reader reader;
try {
reader = new XmlStreamReader(new File(feed.getFile_url()));
} catch (FileNotFoundException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
return reader;
}
}