Filter
Top Products
Identifying the Browser
A
74 Genie Application Style Guide February 2001
■ Java
public void doGet (HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException{
String acc = req.getHeader("Accept");
String ua = req.getHeader("User-Agent");
ServletOutputStream out = res.getOutputStream();
if (acc.indexOf("wml") != -1){
deliver wml
}
else {
res.setHeader(res.SC_MOVED_TEMPORARILY);
res.setHeader("Location", "http://mysite.com/index.html");
}
■ ASP
<%response.buffer="true"
Dim accstring
Dim uastring
uastring = request.ServerVariables("HTTP_USER_AGENT")
accstring = request.ServerVariables("HTTP_ACCEPT")
If (InStr(accstring,"wml")) Then
Deliver wml
Else
Response.Redirect("/index.html")
In all of these cases, it has been established that the client sends WML in the
HTTP_ACCEPT header and can thus assume that WML should be delivered. If WML is not
found in the
HTTP_ACCEPT list, HTML is delivered. This ensures that HTML is delivered
to web browsers and to spiders (crawlers, site indexers).
Once a WML device is found, it is possible to discriminate further to see exactly which
device is accessing the site. Three possibilities are accounted for in this code: (1) the
UP.Browser from Openwave, (2) the Mitsubishi Trium (3) any other device (including the
Nokia browser).
■ Perl
if ($ua =~"UP.B" || $ua =~"UP/"){
Print "Location: /opwv/index.wml \n\n";
}
elseif($ua =~"Mitsu"){
print "Location: /mitsu/index.wml \n\n";
}
else{
print "Location: /nokia/index.wml \n\n";
};