javazoom.download
Class DownloadImpl

java.lang.Object
  javazoom.download.DownloadImpl

public class DownloadImpl

extends java.lang.Object

This class is the core of Download4J.
It instanciates the Debug object for traces.
It instanciates the Config object matching to XML configuration file.
It reads mime-types from XML file.
It checks data availability
It checks for WWW authentication
It checks for download hits limit
It sets the returning Content-Type
It runs the download in the incoming thread
It counts download hits
It runs as a singleton

Constructor Summary

DownloadImpl(java.lang.String configpath, java.lang.String xmlconfig)
Constructs and initializes Download4J.

Method Summary

int	checkAuth(java.lang.String base64auth, FileInfo fi) Checks WWW authentication for FileInfo.
int	checkAuth(java.lang.String base64auth, java.lang.String login, java.lang.String password) Checks WWW authentication for input login/password.
void	download(FileInfo fi, java.io.OutputStream out, Config conf) Downloads file (in the incoming thread) and sends binary data to user's outputstream.
int	getDataLength(FileInfo fi, Config conf) Checks if data available are for download.
void	process(java.lang.String filename, java.util.Properties HttpProps, javax.servlet.http.HttpServletResponse response) Runs download in the incoming thread.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DownloadImpl

public DownloadImpl(java.lang.String configpath,
                    java.lang.String xmlconfig)
             throws org.xml.sax.SAXException,
                    javax.xml.parsers.ParserConfigurationException,
                    java.io.IOException

Constructs and initializes Download4J.

Parameters:

configpath - to xmlconfig file

xmlconfig - file to read and parse

Throws:

org.xml.sax.SAXException

javax.xml.parsers.ParserConfigurationException

java.io.IOException

Method Detail

process

public void process(java.lang.String filename,
                    java.util.Properties HttpProps,
                    javax.servlet.http.HttpServletResponse response)
             throws java.io.IOException

Runs download in the incoming thread.

Parameters:

filename - to download

HttpProps - Http Properties as login/password, IP address

response - for each end-user

Throws:

java.io.IOException

checkAuth

public int checkAuth(java.lang.String base64auth,
                     FileInfo fi)

Checks WWW authentication for FileInfo.

Parameters:

base64auth - base64 encoded login:password

fi - FileInfo

Returns:

0=OK, 1=NOT OK, -1=Not authentication needed.

checkAuth

public int checkAuth(java.lang.String base64auth,
                     java.lang.String login,
                     java.lang.String password)

Checks WWW authentication for input login/password.

Parameters:

base64auth - WWW authentication

login - to check

password - to check

Returns:

0=OK, 1=NOT OK, -1=Not authentication needed.

getDataLength

public int getDataLength(FileInfo fi,
                         Config conf)

Checks if data available are for download.

Parameters:

fi - FileInfo

Returns:

file's length or -1 if file is not found or not readable.

download

public void download(FileInfo fi,
                     java.io.OutputStream out,
                     Config conf)
              throws java.io.IOException

Downloads file (in the incoming thread) and sends binary data to user's outputstream.

Parameters:

fi - Input FileInfo

out - user's outputstream

Throws:

java.io.IOException