BrowserMatch in .NET framework

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BrowserMatch
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The BrowserMatch directive sets and unsets custom environment variables when the regular expression matches a pattern found in the User-Agent header of a HTTP request The User-Agent header is sent by Web clients such as Web browsers, Web robots, and the like Syntax: BrowserMatch regex variable[=value] [] Context: Server config
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Part I Getting Started
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For example, the following sets a variable called vbscript to the value no if the User-Agent header field of the HTTP request contains the word Mozilla, and an environment variable called javascript is set to 1 because no value was specified for this variable:
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BrowserMatch ^Mozilla vbscript=no javascript
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Let s look at another example:
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BrowserMatch IE vbscript !javascript
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Here, the variable javascript is removed and the vbscript is set to 1 if the word IE is found in the User-Agent HTTP request header The ! character removes the variable from the environment
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Note
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A regular expression match is case sensitive
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BrowserMatchNoCase
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The BrowserMatchNoCase directive is same as the BrowserMatch directive, except that it provides case-insensitive matching for regular expressions Syntax: BrowserMatchNoCase regex variable[=value] [] Context: Server config For example, the following directive matches MSIE, msie, Msie, and so on:
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BrowserMatchNoCase ^MSIE vbscript=yes
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SetEnvIf
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Like the BrowserMatch and BrowserMatchNoCase directives, the SetEnvIf directive enables you to set and unset custom environment variables Actually, BrowserMatch and BrowserMatchNoCase are two special versions of SetEnvIf These two directives can only perform the regular expression on the User-Agent HTTP request header field, whereas SetEnvIf can be used for all request header fields, as well as other request-related information, such as remote host name (Remote_Host), remote IP address (Remote_Addr), request method (Request_Method), requested URI (Request_URI), and referrer (Referer) Syntax: SetEnvIf attribute regex envar[=value] [] Context: Server config For example, the following SetEnvIf directive sets the local_user variable to true if the Remote_Host HTTP header is set to yourdomaincom
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SetEnvIf Remote_Host yourdomain\com local_user=true
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5 The Apache Modules
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SetEnvIfNoCase
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The SetEnvIfNoCase directive is the same as SetEnvIf, except that it offers caseinsensitive regular expression matches Syntax: SetEnvIfNoCase attribute regex variable[=value] [] Context: Server config
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mod_unique_id
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The mod_unique_id module provides a magic token for each request that is guaranteed to be unique across all requests under very specific conditions The unique identifier is even unique across multiple machines in a properly configured cluster of machines The environment variable UNIQUE_ID is set to the identifier for each request There are no directives for this module
Authentication and Access Control Modules
Apache has a number of modules to perform authentication and authorization tasks In most cases, the authentication modules use basic HTTP authentication, which uses plain text passwords The authorization module allows you to control access to a directory of your Web site via a username or IP address The modules shown in Table 5-2 enable you to perform authentication and access control tasks
Table 5-2 Authentication and Access Control Modules
Module mod_auth mod_auth_anon mod_auth_dbm mod_auth_db mod_auth_digest mod_access Purpose This is the standard authentication module, which implements Basic HTTP authentication See 7 for details Gives anonymous user access to authenticated areas Provides user authentication using DBM files Provides User authentication using Berkeley DB files This module implements Digest authentication using Message Digest 5 (MD5) This module allows you to authorize access by using host name or IP address See 7 for details
Part I Getting Started
mod_auth_anon
The mod_auth_anon module enables anonymous access to authenticated areas If you are familiar with anonymous FTP servers, this is very similar to such a setup All users can use a user ID called anonymous and their e-mail addresses as the password to get access The e-mail address entered is stored in log files and can be used to perform user tracking or to create a mailing list of prospective clients You have to enable this module by using the --enable-auth-anon option with the configure script in the source distribution, and by compiling and installing Apache
Anonymous
By using the Anonymous directive you can specify one or more usernames that can be used to access the area It is a good idea to keep the username anonymous in your chosen list, because it is widely associated with anonymous access If the username you choose has a space character in it, make sure that the username is surrounded by quotation marks Syntax: Anonymous user user Context: Directory, per-directory access control file (htaccess) Override: AuthConfig For example, the following directive allows users to enter Unregistered User or anonymous as the username to enter an anonymous area