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ASP Tutorial: ASP Browser Capabilities Component

ASP Browser Capabilities Component


Examples


The
Browser Capabilities Component

This example shows how to determine the type, capabilities and version number of
each browser visiting your site.



ASP Browser Capabilities Component


The ASP Browser Capabilities component creates a BrowserType
object that determines the type, capabilities and version number of each browser
that visits your site.


When a browser connects to a server, an HTTP User Agent Header
is also sent to the server. This header contains information about the browser
(like browser type and version number). The BrowserType object then compares the
information in the header with information in a file on the server called
"Browscap.ini".


If there is a match between the browser type and version
number sent in the header and the information in the "Browsercap.ini"
file, you can use the BrowserType object to list the properties of the matching
browser. If there is no match for the browser type and version number in the
Browscap.ini file, it will set every property to "UNKNOWN".


Syntax








<%

Set MyBrow=Server.CreateObject("MSWC.BrowserType") 

%>

The example below creates a BrowserType object in an ASP file,
and displays a table showing some of the capabilities of the current browser:









<html>
<body>

<%
Set MyBrow=Server.CreateObject("MSWC.BrowserType")
%>

<table border="1" width="100%">
<tr>
<th>Client OS</th>
<th><%=MyBrow.platform%></th>
</tr><tr>
<td >Web Browser</td>
<td ><%=MyBrow.browser%></td>
</tr><tr>
<td>Browser version</td>
<td><%=MyBrow.version%></td>
</tr><tr>
<td>Frame support?</td>
<td><%=MyBrow.frames%></td>
</tr><tr>
<td>Table support?</td>
<td><%=MyBrow.tables%></td>
</tr><tr>
<td>Sound support?</td>
<td><%=MyBrow.backgroundsounds%></td>
</tr><tr>
<td>Cookies support?</td>
<td><%=MyBrow.cookies%></td>
</tr><tr>
<td>VBScript support?</td>
<td><%=MyBrow.vbscript%></td>
</tr><tr>
<td>JavaScript support?</td>
<td><%=MyBrow.javascript%></td>
</tr>
</table>

</body>
</html>

Output:









































Client OS WinNT
Web Browser IE
Browser version 5.0
Frame support? True
Table support? True
Sound support? True
Cookies support? True
VBScript support? True
JavaScript support? True





The Browscap.ini File


The "Browsercap.ini" file is used to declare
properties and to set default values for browsers.


This section is not a tutorial on how to maintain
"Browsercap.ini" files, it only shows you the basics; so you get an
idea what a "Browsercap.ini" file is all about.


The "Browsercap.ini" file can contain the following:









[;comments]
[HTTPUserAgentHeader] 
[parent=browserDefinition]
[property1=value1]
[propertyN=valueN] 
[Default Browser Capability Settings]
[defaultProperty1=defaultValue1]
[defaultPropertyN=defaultValueN]







































Parameter Description
comments Optional. Any line that starts with a semicolon are
ignored by the BrowserType object
HTTPUserAgentHeader Optional. Specifies the HTTP User Agent header to
associate with the browser-property value statements specified in
propertyN. Wildcard characters are allowed
browserDefinition Optional. Specifies the HTTP User Agent header-string
of a browser to use as the parent browser. The current browser's
definition will inherit all of the property values declared in the
parent browser's definition
propertyN Optional. Specifies the browser properties. The
following table lists some possible properties:

  • ActiveXControls - Support ActiveX® controls?
  • Backgroundsounds - Support background sounds?
  • Cdf - Support Channel Definition Format for
    Webcasting?
  • Tables - Support tables?
  • Cookies - Support cookies?
  • Frames - Support frames?
  • Javaapplets - Support Java applets?
  • Javascript - Supports JScript?
  • Vbscript - Supports VBScript?
  • Browser - Specifies the name of the browser
  • Beta - Is the browser beta software?
  • Platform - Specifies the platform that the browser
    runs on
  • Version - Specifies the version number of the
    browser
valueN Optional. Specifies the value of propertyN. Can be a
string, an integer (prefix with #), or a Boolean value
defaultPropertyN Optional. Specifies the name of the browser property to
which to assign a default value if none of the defined
HTTPUserAgentHeader values match the HTTP User Agent header sent by the
browser
defaultValueN Optional. Specifies the value of defaultPropertyN. Can
be a string, an integer (prefix with #), or a Boolean value

A "Browsercap.ini" file might look something like
this:









;IE 5.0
[IE 5.0]
browser=IE
Version=5.0
majorver=#5
minorver=#0
frames=TRUE
tables=TRUE
cookies=TRUE
backgroundsounds=TRUE
vbscript=TRUE
javascript=TRUE
javaapplets=TRUE
ActiveXControls=TRUE
beta=False

;DEFAULT BROWSER
[*]
browser=Default
frames=FALSE 
tables=TRUE 
cookies=FALSE 
backgroundsounds=FALSE 
vbscript=FALSE 
javascript=FALSE




Posted by JONAS