Hi i am developping an Email Filter for an application that scan through mails to determine if they are or not spams, here is my class:
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import ca.etsmtl.logti.log619.lab05.utilities.EmailSplicer;
public class MotsClesFilter implements EmailFilter {
final String NAME = "Filtrage par mots cles";
private Pattern chaineSpam;
private Matcher chaineCourriel;
private int nbOccMotSpam =0;
private byte confidenceLevel;
@Override
public String getFilterName() {
return this.NAME;
}
@Override
public byte checkSpam(MimeMessage message) {
analyze(message);
switch(this.nbOccMotSpam){
case 0:
this.confidenceLevel = 1;
break;
case 1:
this.confidenceLevel = CANT_SAY;
break;
case 2:
this.confidenceLevel= 50;
break;
case 3:
this.confidenceLevel = 70;
break;
case 4 :
this.confidenceLevel = 80;
break;
} return (getConfidenceLevel());
}
public void analyze(MimeMessage message){
try {
List<String> listeChaines = new ArrayList<String>();
BufferedReader bis = new BufferedReader(new InputStreamReader(new FileInputStream(new File("SpamWords.txt"))));
while(bis.ready()){
String ligne = bis.readLine();
listeChaines.add(ligne);
}
String[] tabMots = EmailSplicer.getMessageContent(message);
for (int i =0;i<tabMots.length;i++){
/*System.out.print("*************************************");
System.out.print(tabMots[0]);
System.out.print("**************************************");*/
for (int j =0; j<listeChaines.size();j++){
this.chaineSpam = Pattern.compile(listeChaines.get(j));
this.chaineCourriel = this.chaineSpam.matcher(tabMots[i]);
if (this.chaineCourriel.matches())
this.nbOccMotSpam++;
}
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public byte getConfidenceLevel() {
// TODO Auto-generated method stub
return this.confidenceLevel;
}
@Override
public boolean enabled() {
// TODO Auto-generated method stub
return true;
}
}
and here's the EmailSplicer utility class that i am using:
import java.io.IOException;
import java.util.ArrayList;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.internet.MimeMessage;
/**
* Utility class to return all the content of a MimeMessage
* @author Maxime Caumartin <[email protected]>
*/
public class EmailSplicer {
/**
* Contains the types of email parts that can be analyzed by this class.
* @author Maxime Caumartin <[email protected]>
*/
private enum ContentTypes
{
Plain("text/plain"), HTML("text/html"), Multipart("multipart"), Unknown(
"?");
private String type;
ContentTypes(String type)
{
this.type = type;
}
public static ContentTypes getType(String type)
{
if (type.contains(Plain.type))
return Plain;
if (type.contains(HTML.type))
return HTML;
if (type.contains(Multipart.type))
return Multipart;
return Unknown;
}
}
/**
* Recursive method that passes through all the parts of the Mutlipart message and returns an ArrayList<String> of the content of these parts.
* @param multiPartMsg The Multipart that needs to be dissected.
* @return The ArrayList<String> containing all the content of the Mutlipart message.
* @throws MessagingException Exception thrown if the analyzer cannot read the message.
* @throws IOException Exception thrown if the encoding type isn't valid.
*/
private static ArrayList<String> getMutlipartContent(Multipart multiPartMsg)
throws MessagingException, IOException
{
ArrayList<String> returnTable = new ArrayList<String>(
multiPartMsg.getCount());
for (int i = 0; i < multiPartMsg.getCount(); i++)
{
switch (ContentTypes.getType(multiPartMsg.getBodyPart(i)
.getContentType()))
{
case Plain:
returnTable.add((String) multiPartMsg.getBodyPart(i)
.getContent());
break;
case HTML:
String s = org.clapper.util.html.HTMLUtil.textFromHTML((String) multiPartMsg.getBodyPart(i)
.getContent()).trim();
if (s.length() != 0)
returnTable.add(s);
break;
case Multipart:
returnTable
.addAll(getMutlipartContent((Multipart) multiPartMsg
.getBodyPart(i).getContent()));
break;
default:
}
}
return returnTable;
}
/**
* Returns all the content of the MimeMessage passed as a parameter. The whole content will be parsed.
* @param message The MimeMessage containing textual information.
* @return The array of string containing all the strings from the content of the message.
* @throws MessagingException Exception thrown if the analyzer cannot read the message.
* @throws IOException Exception thrown if the encoding type isn't valid.
*/
public static String[] getMessageContent(MimeMessage message)
throws MessagingException, IOException
{
String contentType = message.getContentType();
switch (ContentTypes.getType(contentType))
{
case Plain:
return new String[] { (String) message.getContent() };
case Multipart:
return getMutlipartContent(
(Multipart) message.getContent()).toArray(new String[0]);
case HTML:
String s = org.clapper.util.html.HTMLUtil.textFromHTML((String) message
.getContent()).trim();
if (s.length() != 0)
return new String[] {s};
default:
return new String[0];
}
}
}
Now when i am executing the main method of the whole app, this the exception that i am getting:
java.io.UnsupportedEncodingException: iso-0621-9
at sun.nio.cs.StreamDecoder.forInputStreamReader(Unknown Source)
at java.io.InputStreamReader.<init>(Unknown Source)
at com.sun.mail.handlers.text_plain.getContent(text_plain.java:82)
at javax.activation.DataSourceDataContentHandler.getContent(Unknown Source)
at javax.activation.DataHandler.getContent(Unknown Source)
at javax.mail.internet.MimeBodyPart.getContent(MimeBodyPart.java:629)
at ca.etsmtl.logti.log619.lab05.utilities.EmailSplicer.getMutlipartContent(EmailSplicer.java:69)
at ca.etsmtl.logti.log619.lab05.utilities.EmailSplicer.getMessageContent(EmailSplicer.java:101)
at ca.etsmtl.logti.log619.lab05.filter.MotsClesFilter.analyze(MotsClesFilter.java:66)
at ca.etsmtl.logti.log619.lab05.filter.MotsClesFilter.checkSpam(MotsClesFilter.java:34)
at ca.etsmtl.logti.log619.lab05.Application.main(Application.java:107)
Can someone enlighten me on how to fix it ?
