Browser Sniffing

[jsulman]

Is there any way I can sniff for the browser type from a servlet?

Thanks in advance

Jeff Sulman

 

[onpnt]

referenced from:

http://www.experts-exchange.com/Web/Web_Languages/JSP/Q_20782234.html

private String getOs(String userAgent) {
String retVal;
int ix;
String lowerUA = userAgent.toLowerCase();

if (lowerUA.indexOf("win95&quot > -1) {
return "Windows 95";
} else if (lowerUA.indexOf("win98&quot > -1) {
return "Windows 98";
} else if ((ix = lowerUA.indexOf("windows&quot) > -1) {
retVal = userAgent.substring(ix);
int ix2 = lowerUA.indexOf("windows", ix + 7);
if (ix2 > -1) {
retVal = userAgent.substring(ix2);
}
} else if ((ix = lowerUA.indexOf("linux&quot) > -1) {
return "Linux";
} else if ((ix = lowerUA.indexOf("x11&quot) > -1) {
return "UNIX";
} else if ((ix = lowerUA.indexOf("mac os&quot) > -1) {
retVal = userAgent.substring(ix);
} else if ((ix = lowerUA.indexOf("mac&quot) > -1) {
return "Mac";
} else {
return "Unknown";
}

// clean up the strings that need cleaning
retVal = retVal.trim();

if ((ix = retVal.indexOf(";&quot) > -1) {
retVal = retVal.substring(0, ix);
}

if ((ix = retVal.indexOf(&quot&quot) > -1) {
retVal = retVal.substring(0, ix);
}

return retVal;

}


private String getBrowser(String userAgent)
{
String retVal;

if (userAgent.indexOf("opera&quot > -1) {
retVal = "Opera";
} else if (userAgent.indexOf("msie&quot > -1) {
retVal = "Internet Explorer";
} else if (userAgent.indexOf("netscape&quot > -1) {
retVal = "Netscape";
} else if (userAgent.indexOf("mozilla&quot > -1) {
retVal = "Netscape";
} else {
retVal = "Unknown";
}

return retVal;
}

private String getBrowserVersion(String userAgent) {
String retVal;
int ix;

String lowerUA = userAgent.toLowerCase();

if ((ix = lowerUA.indexOf("opera&quot) > -1) {
retVal = userAgent.substring(ix + 5);
} else if ((ix = lowerUA.indexOf("msie&quot) > -1) {
retVal = userAgent.substring(ix + 4);
} else if ((ix = lowerUA.indexOf("netscape&quot) > -1) {
retVal = userAgent.substring(ix + 8);
} else if ((ix = lowerUA.indexOf("mozilla&quot) > -1) {
retVal = userAgent.substring(ix + 7);
} else {
retVal = "Unknown";
}

// clean up the strings
retVal = retVal.trim();

if ((ix = retVal.indexOf(" &quot) > -1) {
retVal = retVal.substring(0, ix);
}

if ((ix = retVal.indexOf(";&quot) > -1) {
retVal = retVal.substring(0, ix);
}

if ((ix = retVal.indexOf("/&quot) > -1) {
retVal = retVal.substring(ix + 1);
}

return retVal;
}

private String getCodeType(String userAgent) {
String retVal;

int ix = userAgent.indexOf("/"
if (ix == -1) {
int ix2 = userAgent.indexOf(" "
if (ix2 != -1) {
retVal = userAgent.substring(0, ix2);
} else {
retVal = "Unknown";
}
} else {
retVal = userAgent.substring(0, ix);
}

return retVal;
}

private String getCodeTypeVersion(String userAgent) {
String retVal;
String ct = getCodeType(userAgent);
if (!ct.equals("Unknown&quot) {
retVal = userAgent.substring(userAgent.indexOf(ct) + ct.length() + 1);
int ix = retVal.indexOf(" "
if (ix != -1) {
retVal = retVal.substring(0, ix);
}
} else {
retVal = "Unknown";
}

return retVal;
}

in your JSP:

// get header information
String header = req.getHeader("user-agent"

// parse out os, browser, and codeType
String os = getOs(header);
String browser = getBrowser(header.toLowerCase());
String browserVersion = getBrowserVersion(header);
String codeType = getCodeType(header);
String codeTypeVersion = getCodeTypeVersion(header);



_____________________________________________________________________

_{Hakuna matata!!}

 

[onpnt]

getting this info on the client is a bit more simplicit and resource friendly task also.
eg:
<SCRIPT LANGUAGE = &quot;JavaScript&quot;>
var version = 0;
if (navigator.userAgent.indexOf(&quot;Mozilla/3.0&quot != -1)version = 3;
else if
(navigator.userAgent.indexOf(&quot;MSIE&quot != -1) version = 1;
else if (navigator.userAgent.indexOf(&quot;Mozilla/2.0&quot != -1) version = 2;
else version = 0;
function browser_type()
{
if (version == 3) return &quot;Netscape Version 3.0&quot;;
if (version == 2) return &quot;Netscape Version 2.x&quot;;
if (version == 1) return &quot;Microsoft Internet Explorer 3.0&quot;;
if (version == 0) return &quot;an off-the-wall JavaScript browser&quot;;
}
</SCRIPT>


_____________________________________________________________________

_{Hakuna matata!!}