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/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.mobicents.servlet.sip.router;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Map.Entry;
import javax.servlet.sip.ar.SipApplicationRouterInfo;
import javax.servlet.sip.ar.SipApplicationRoutingRegion;
import javax.servlet.sip.ar.SipApplicationRoutingRegionType;
import javax.servlet.sip.ar.SipRouteModifier;
import org.apache.log4j.Logger;
/**
* This is a utility class used for parsing the default application router file as defined in Appendix C of JSR289.
*
*/
public class DefaultApplicationRouterParser {
private static final int SIP_APPLICATION_ROUTER_INFO_PARAM_NB = 6;
// the logger
private static Logger log = Logger.getLogger(DefaultApplicationRouterParser.class);
private Properties properties;
public DefaultApplicationRouterParser() {
properties = new Properties();
}
public void init(Properties props) {
properties = props;
}
/**
* Load the configuration file as defined in JSR289 Appendix C ie as a system property "javax.servlet.sip.dar"
*
* @throws IllegalArgumentException if anything goes wrong when trying to load the configuration file
*/
public void init() {
// load the configuration file
String darConfigurationFileLocation = getDarConfigurationFileLocation();
if (log.isDebugEnabled()) {
log.debug("Default Application Router file Location : " + darConfigurationFileLocation);
}
File darConfigurationFile = null;
// hack to get around space char in path see http://weblogs.java.net/blog/kohsuke/archive/2007/04/how_to_convert.html,
// we create a URL since it's permissive enough
URL url = null;
try {
url = new URL(darConfigurationFileLocation);
} catch (MalformedURLException e) {
log.fatal("Cannot find the default application router file ! ", e);
throw new IllegalArgumentException("The Default Application Router file Location : " + darConfigurationFileLocation
+ " is not valid ! ", e);
}
try {
darConfigurationFile = new File(new URI(darConfigurationFileLocation));
} catch (URISyntaxException e) {
// if the uri contains space this will fail, so getting the path will work
darConfigurationFile = new File(url.getPath());
}
FileInputStream fis = null;
try {
fis = new FileInputStream(darConfigurationFile);
properties.load(fis);
} catch (FileNotFoundException e) {
log.fatal("Cannot find the default application router file ! ", e);
throw new IllegalArgumentException("The Default Application Router file Location : " + darConfigurationFileLocation
+ " is not valid ! ", e);
} catch (IOException e) {
log.fatal("Cannot load the default application router file ! ", e);
throw new IllegalArgumentException("The Default Application Router file Location : " + darConfigurationFileLocation
+ " cannot be loaded ! ", e);
} finally {
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
log.error("fail to close the following file " + darConfigurationFile.getAbsolutePath(), e);
}
}
}
}
/**
* Parse the global default application router file from the loaded properties file from the init method
*
* @return a Map of key as sip method and value as a list of SipApplicationRouterInfo
* @throws ParseException if anything goes wrong during the parsing
*/
public Map> parse() throws ParseException {
Map> sipApplicationRoutingInfo = new HashMap>();
Iterator darEntriesIterator = properties.entrySet().iterator();
while (darEntriesIterator.hasNext()) {
Entry darEntry = (Entry) darEntriesIterator.next();
// get the key
String sipMethod = darEntry.getKey();
String sipApplicationRouterInfosStringified = darEntry.getValue();
// parse the corresponding value
List sipApplicationRouterInfoList = parseSipApplicationRouterInfos(sipApplicationRouterInfosStringified);
sipApplicationRoutingInfo.put(sipMethod, sipApplicationRouterInfoList);
}
return sipApplicationRoutingInfo;
}
/**
* Same method as above, but loads DAR configuration from a string.
*
* @param configuration
* @return
* @throws ParseException
*/
public Map> parse(String configuration) throws ParseException {
Properties tempProperties = new Properties();
// tempProperties.load(new StringReader(configuration)); // This needs Java 1.6
ByteArrayInputStream stringStream = new ByteArrayInputStream(configuration.getBytes());
try {
tempProperties.load(stringStream);
} catch (IOException e) {
log.warn("Failed to update AR configuration. Will use the old properties.");
return null;
}
this.properties = tempProperties;
return parse();
}
/**
* Same method as above, but loads DAR configuration from properties.
*
* @param configuration
* @return
* @throws ParseException
*/
public Map> parse(Properties properties) throws ParseException {
this.properties = properties;
return parse();
}
/**
* Parse a string corresponding to one or more definition of SipApplicationRouterInfo ex : ("SimpleSipServlet", "DAR:From",
* "ORIGINATING", "", "NO_ROUTE", "0"), ("SimpleSipServlet", "DAR:To", "TERMINATING", "", "NO_ROUTE", "1") and return the
* corresponding object list
*
* @param sipApplicationRouterInfosStringified the stringified list of SipApplicationRouterInfo
* @return a list of SipApplicationRouterInfo
* @throws ParseException if anything goes wrong during the parsing
*/
private List parseSipApplicationRouterInfos(String sipApplicationRouterInfosStringified)
throws ParseException {
List sipApplicationRouterInfos = new ArrayList();
while (sipApplicationRouterInfosStringified.indexOf("(") != -1) {
int indexOfLeftParenthesis = sipApplicationRouterInfosStringified.indexOf("(");
int indexOfRightParenthesis = sipApplicationRouterInfosStringified.indexOf(")");
if (indexOfLeftParenthesis == -1 || indexOfRightParenthesis == -1) {
throw new ParseException(
"Parenthesis expectected. Cannot parse the following string from the default application router file"
+ sipApplicationRouterInfosStringified, 0);
}
String sipApplicationRouterInfoStringified = sipApplicationRouterInfosStringified.substring(indexOfLeftParenthesis,
indexOfRightParenthesis + 1);
DefaultSipApplicationRouterInfo sipApplicationRouterInfo = parseSipApplicationRouterInfo(sipApplicationRouterInfoStringified);
// get the index order from the default application router properties file
sipApplicationRouterInfos.add(sipApplicationRouterInfo);
sipApplicationRouterInfosStringified = sipApplicationRouterInfosStringified.substring(indexOfRightParenthesis + 1);
}
// Sort based on the app number
Collections.sort(sipApplicationRouterInfos, new Comparator() {
public int compare(DefaultSipApplicationRouterInfo arg0, DefaultSipApplicationRouterInfo arg1) {
if (arg0.getOrder() == arg1.getOrder())
return 0;
if (arg0.getOrder() > arg1.getOrder())
return 1;
return -1;
}
});
return sipApplicationRouterInfos;
}
/**
* Parse a string corresponding to one definition of SipApplicationRouterInfo and return the corresponding Object ex :
* ("SimpleSipServlet", "DAR:From", "ORIGINATING", "", "NO_ROUTE", "0")
*
* @param sipApplicationRouterInfoStringified the stringified SipApplicationRouterInfo
* @return the corresponding SipApplicationRouterInfo
* @throws ParseException if anything goes wrong during the parsing
*/
private DefaultSipApplicationRouterInfo parseSipApplicationRouterInfo(String sipApplicationRouterInfoStringified)
throws ParseException {
// there will always have 6 parameters in a SipApplicationRouterInfo for the default applicationRouterInfo
String[] sipApplicationRouterInfoParameters = new String[SIP_APPLICATION_ROUTER_INFO_PARAM_NB];
for (int i = 0; i < SIP_APPLICATION_ROUTER_INFO_PARAM_NB; i++) {
int indexOfLeftQuote = sipApplicationRouterInfoStringified.indexOf("\"");
if (indexOfLeftQuote == -1) {
throw new ParseException(
"Left quote expected. Cannot parse the following string from the default application router file"
+ sipApplicationRouterInfoStringified, 0);
}
int indexOfRightQuote = sipApplicationRouterInfoStringified.substring(indexOfLeftQuote + 1).indexOf("\"");
if (indexOfRightQuote == -1) {
throw new ParseException(
"Right quote expected. Cannot parse the following string from the default application router file "
+ sipApplicationRouterInfoStringified, 0);
}
indexOfRightQuote += indexOfLeftQuote;
String sipApplicationRouterInfoParameter = sipApplicationRouterInfoStringified.substring(indexOfLeftQuote + 1,
indexOfRightQuote + 1);
sipApplicationRouterInfoParameters[i] = sipApplicationRouterInfoParameter;
sipApplicationRouterInfoStringified = sipApplicationRouterInfoStringified.substring(indexOfRightQuote + 2);
}
// Parse optional DAR field while is a set of key/value pairs
String optionalParameters = null;
int indexOfLeftQuote = sipApplicationRouterInfoStringified.indexOf("\"");
if (indexOfLeftQuote != -1) {
int indexOfRightQuote = sipApplicationRouterInfoStringified.substring(indexOfLeftQuote + 1).indexOf("\"");
if (indexOfRightQuote != -1) {
indexOfRightQuote += indexOfLeftQuote;
optionalParameters = sipApplicationRouterInfoStringified.substring(indexOfLeftQuote + 1, indexOfRightQuote + 1);
} else {
throw new ParseException("Expected a right quote in the optiona parameters", indexOfLeftQuote);
}
}
// Parsing is done
int order = -1;
try {
order = Integer.parseInt(sipApplicationRouterInfoParameters[5]);
} catch (NumberFormatException nfe) {
throw new ParseException("Impossible to parse the state info into an integer for this line "
+ sipApplicationRouterInfoStringified, 0);
}
return new DefaultSipApplicationRouterInfo(
// application name
sipApplicationRouterInfoParameters[0],
// subsriberURI
sipApplicationRouterInfoParameters[1],
// routing region
new SipApplicationRoutingRegion(sipApplicationRouterInfoParameters[2], SipApplicationRoutingRegionType.valueOf(
SipApplicationRoutingRegionType.class, sipApplicationRouterInfoParameters[2])),
// route
new String[] { sipApplicationRouterInfoParameters[3] },
// sip route modifier
SipRouteModifier.valueOf(SipRouteModifier.class, sipApplicationRouterInfoParameters[4]),
// stateinfo
order, optionalParameters);
}
public String getDarConfigurationFileLocation() {
return System.getProperty("javax.servlet.sip.dar");
}
public Properties getProperties() {
return properties;
}
}
