org.juniverse.utils
Class BrowserDetector

java.lang.Object
  |
  +--org.juniverse.utils.BrowserDetector

public class BrowserDetector

extends java.lang.Object

This class is original from the Apache Turbine Project.
This class parses the user agent string and sets javasciptOK and cssOK following the rules described below. If you want to check for specific browsers/versions then use this class to parse the user agent string and use the accessor methods in this class. JavaScriptOK means that the browser understands JavaScript on the same level the Navigator 3 does. Specifically, it can use named images. This allows easier rollovers. If a browser doesn't do this (Nav 2 or MSIE 3), then we just assume it can't do any JavaScript. Referencing images by load order is too hard to maintain. CSSOK is kind of sketchy in that Nav 4 and MSIE work differently, but they do seem to have most of the functionality. MSIE 4 for the Mac has buggy CSS support, so we let it do JavaScript, but no CSS. Ported from Leon's PHP code at http://www.working-dogs.com/freetrade by Frank.

Version:

$Id: BrowserDetector.java,v 1.1.1.1 2001/08/16 05:09:37 jvanzyl Exp $

Author:

Frank Y. Kim

, Leon Atkisnon , Chris Mospaw , Benjamin Elijah Griffin

Field Summary

private java.lang.String	browserName The browser name specified in the user agent string.
private java.lang.String	browserPlatform The browser platform specified in the user agent string.
private float	browserVersion The browser version specified in the user agent string.
private boolean	cssOK Whether or not CSS works in this browser.
private boolean	fileUploadOK Whether or not file upload works in this browser.
private boolean	javascriptOK Whether or not javascript works in this browser.
static java.lang.String	MACINTOSH
static java.lang.String	MOZILLA
static java.lang.String	MSIE Constants used by this class.
static java.lang.String	OPERA
static java.lang.String	UNIX
private java.lang.String	userAgentString The user agent string.
static java.lang.String	WINDOWS

Constructor Summary

BrowserDetector(javax.servlet.http.HttpServletRequest request)
Constructor used to initialize this class.

BrowserDetector(java.lang.String userAgentString)
Constructor used to initialize this class.

Method Summary

java.lang.String	getBrowserName() The browser name specified in the user agent string.
java.lang.String	getBrowserPlatform() The browser platform specified in the user agent string.
float	getBrowserVersion() The browser version specified in the user agent string.
java.lang.String	getUserAgentString() The user agent string for this class.
boolean	isCssOK() Whether or not CSS works in this browser.
boolean	isFileUploadOK() Whether or not file upload works in this browser.
boolean	isJavascriptOK() Whether or not Javascript works in this browser.
private void	parse() Helper method to initialize this class.
private float	toFloat(java.lang.String s) Helper method to conver String to a float.

Methods inherited from class java.lang.Object

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

Field Detail

userAgentString

private java.lang.String userAgentString

The user agent string.

browserName

private java.lang.String browserName

The browser name specified in the user agent string.

browserVersion

private float browserVersion

The browser version specified in the user agent string. If we can't parse the version just assume an old browser.

browserPlatform

private java.lang.String browserPlatform

The browser platform specified in the user agent string.

javascriptOK

private boolean javascriptOK

Whether or not javascript works in this browser.

cssOK

private boolean cssOK

Whether or not CSS works in this browser.

fileUploadOK

private boolean fileUploadOK

Whether or not file upload works in this browser.

MSIE

public static final java.lang.String MSIE

Constants used by this class.

See Also:

Constant Field Values

OPERA

public static final java.lang.String OPERA

See Also:

Constant Field Values

MOZILLA

public static final java.lang.String MOZILLA

See Also:

Constant Field Values

WINDOWS

public static final java.lang.String WINDOWS

See Also:

Constant Field Values

UNIX

public static final java.lang.String UNIX

See Also:

Constant Field Values

MACINTOSH

public static final java.lang.String MACINTOSH

See Also:

Constant Field Values

Constructor Detail

BrowserDetector

public BrowserDetector(java.lang.String userAgentString)

Constructor used to initialize this class.

Parameters:

userAgentString - A String with the user agent field.

BrowserDetector

public BrowserDetector(javax.servlet.http.HttpServletRequest request)

Constructor used to initialize this class.

Parameters:

request - a HttpServletRequest

Method Detail

isCssOK

public boolean isCssOK()

Whether or not CSS works in this browser.

Returns:

True if CSS works in this browser.

isFileUploadOK

public boolean isFileUploadOK()

Whether or not file upload works in this browser.

Returns:

True if file upload works in this browser.

isJavascriptOK

public boolean isJavascriptOK()

Whether or not Javascript works in this browser.

Returns:

True if Javascript works in this browser.

getBrowserName

public java.lang.String getBrowserName()

The browser name specified in the user agent string.

Returns:

A String with the browser name.

getBrowserPlatform

public java.lang.String getBrowserPlatform()

The browser platform specified in the user agent string.

Returns:

A String with the browser platform.

getBrowserVersion

public float getBrowserVersion()

The browser version specified in the user agent string.

Returns:

A String with the browser version.

getUserAgentString

public java.lang.String getUserAgentString()

The user agent string for this class.

Returns:

A String with the user agent.

parse

private void parse()

Helper method to initialize this class.

toFloat

private float toFloat(java.lang.String s)

Helper method to conver String to a float.

Parameters:

s - A String.

Returns:

The String converted to float.