Read client information using JSP
Please read the following code. If your use is different, you can make it easy to modify these codes. These code can get you:
Company companies, users name, version version, main version, minor version
Operating system (unfinished!), Language Language, Locale, etc.
Create a new JSP file:
<% @ page language = "java" import = "de.hunsicker.http.util. *"%>
<%
Browser Eins = New Browser (Request, Session);
Out.println (Eins.getVersion ());
%>
Add the following Class files to ClassPath (you want to build the same directory structure - de.hunsicker.http.util, of course, you can also adjust the name of the package.!):
Package de.hunsicker.http.util;
Import java.util. *;
Import javax.servlet. *;
Import javax.servlet.http. *;
Public Class Browser Extends Httpservlet
{
Protected httpservletRequest request;
Protected httpsession session;
Protected string uSgene;
Protected string company; // firmenname des harstellers
Protected string name; // bezeichnung des browsers
protected string version; // version
protected string mainversion; // hauptversion
Protected string minorversion; // unterVersion
Protected string OS; // Betriebssystem
protected string language = "de"; // sprachcode standard
Protected locale locale; // locale-object mit den aktuellen
// spracheinstellungen
Private HashTable Supportedlanguages; // Unterstzte Sprachen
Public Browser (HttpServletRequest Request, httpsession session)
{
THIS.INITIALIZE ();
THIS.REQUEST = REQUEST;
THIS.SESSION = session;
THIS.SETUSERAGENT (THIS.Request.getHeader ("User-Agent");
this.setcompany ();
this.setname ();
THIS.SETVERSION ();
THIS.SETMAINVERSION ();
THIS.SETMINORVERSION ();
THIS.SETOS ();
THIS.SETLANGUAGE ();
THIS.SETLOCALE ();
}
Public void initialize ()
{
THIS.SUPPORTEDLANGUAGES = New Hashtable (2);
This.Supportedlanguages.Put ("en", "); this.supportedlanguages.put (" de ",");
}
Public void setUseRagent (String httpuseragent)
{
THIS. IUSERAGENT = httpusemergent.tolowercase ();
}
Private void setcompany ()
{
IF (this.Useragent.indexof ("msie")> -1)
{
this.company = "microsoft";
}
Else IF (this.USERAGENT.INDEXOF ("Opera")> -1)
{
This.Company = "Opera Software";
}
Else IF (this.USERAGENT.INDEXOF ("Mozilla")> -1)
{
This.Company = "Netscape Communications";
}
Else
{
this.company = "unknown";
}
}
/ **
* Liefert Den Firmennamen des Herstellers des verweten browsers.
* /
Public String getcompany ()
{
Return this.Company;
}
Private void setname ()
{
IF (this.company == "microsoft")
{
THIS.NAME = "Microsoft Internet Explorer";
}
Else IF (this.company == "Netscape Communications")
{
THIS.NAME = "Netscape Navigator";
}
Else IF (this.company == "Operasoftware")
{
THIS.NAME = "Operasoftware Opera";
}
Else
{
THIS.NAME = "unknown";
}
}
/ **
* Liefert Den Namen Des Verweeten Browsers.
* /
Public string getName ()
{
Return this.name;
}
Private void setversion ()
{
INT TMPOS;
String tmpstring;
IF (this.company == "microsoft")
{
String str = this.USERAGENT.SUBSTRING (this.USERAGENT.INDEXOF ("MSIE") 5);
This.version = str.substring (0, str.indexof (";"));
}
Else
{
TMPSTRING = (this.Useragent.substring (Tmpos = (this.usemergent.indexof ("/")) 1, TMPPOS THISUSERAGENT.INDEXOF (""))). TRIM ();
THISTRING.SUBSTRING (0, tmpstring.indexof ("));
}
/ **
* Liefert Die VersionsNummer Des Verweeten Browsers.
* /
Public string getversion ()
{
Return this.version;
}
Private void setmainversion ()
{
THIS.MAINVERSION = this.version.substring (0, this.version.indexof ("."));
}
/ **
* Liefert Die HauptversionsNummer Des Verweeten Browsers.
* /
Public string getmainversion ()
{
Return this.mainversion;
}
Private void setminorversion ()
{
THIS.MINORVERSION = this.version.substring (this.version.indexof (".") 1) .trim ();
}
/ **
* Liefert Die UnterVersionsNummer Des Verweeten Browsers.
* /
Public String getminorversion ()
{
Return this.minorversion;
}
Private void setos ()
{
IF (this.USERAGENT.INDEXOF ("WIN")> -1)
{
IF (this.useragent.indexof ("Windows 95")> -1 || this.useragent.indexof ("Win95")> -1)
{
THIS.OS = "Windows 95";
}
IF (this.useragent.indexof ("Windows 98")> -1 || this.USERAGENT.INDEXOF ("WIN98")> -1)
{
THIS.OS = "Windows 98";
}
IF (this.USERAGENT.INDEXOF ("Windows NT")> -1 || this.USERAGENT.INDEXOF ("WinNT")> -1)
{
THIS.OS = "Windows NT";
}
IF (this.Useragent.indexof ("Win16")> -1 || this.USERAGENT.INDEXOF ("Windows 3.")> -1)
{
THIS.OS = "Windows 3.x";
}
}
}
/ **
* Liefert Den Namen des betriebssystems.
* /
Public String Getos ()
{
Return this.OS;
}
Private void setLanguage ()
{
String preflanguage = this.Request.getHeader ("accept-language");
IF (preflanguage! = NULL)
{
String language = NULL;
StringTokenizer St = New StringTokenizer (Preflanguage, ","); Int elements = st.counttoKens ();
For (int idx = 0; idx elements; idx )
{
IF (this.supportedlanguages.containskey ((language = st.nextToken ())))))))
{
THIS.LANGUAGE = this.Parselocale (Language);
}
}
}
}
/ *
* Hilfsfunktion fr setLanguage ().
* /
Private string Parselocale (String language)
{
StringTokenizer ST = New StringTokenizer (Language, "-");
IF (st.countToKens () == 2)
{
Return st.nextToken ();
}
Else
{
Return language;
}
}
/ **
* LIEFERT DAS L? Nderkürzel Der Vom Benutzer
* Bevorzugten Sprache.
* /
Public string getLanguage ()
{
Return this.language;
}
Private void setlocale ()
{
THISLOCALE = New local (this.language, "");
}
/ **
* Liefert Ein Locale-Objekt Mit der sprach-prferenz des verweten Browsers
* /
Public Locale getLocale ()
{
Return THISLOCALE;
}
}
