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|
=encoding utf-8
=head1 NAME
ngx_http_browser_module - Module ngx_http_browser_module
=head1
The C<ngx_http_browser_module> module creates variables
whose values depend on the value of the C<User-Agent>
request header field:
=over
=item C<$modern_browser>
equals the value set by the L</modern_browser_value> directive,
if a browser was identified as modern;
=item C<$ancient_browser>
equals the value set by the L</ancient_browser_value> directive,
if a browser was identified as ancient;
=item C<$msie>
equals “1” if a browser was identified as MSIE of any version.
=back
=head1 Example Configuration
Choosing an index file:
modern_browser_value "modern.";
modern_browser msie 5.5;
modern_browser gecko 1.0.0;
modern_browser opera 9.0;
modern_browser safari 413;
modern_browser konqueror 3.0;
index index.${modern_browser}html index.html;
Redirection for old browsers:
modern_browser msie 5.0;
modern_browser gecko 0.9.1;
modern_browser opera 8.0;
modern_browser safari 413;
modern_browser konqueror 3.0;
modern_browser unlisted;
ancient_browser Links Lynx netscape4;
if ($ancient_browser) {
rewrite ^ /ancient.html;
}
=head1 Directives
=head2 ancient_browser
B<syntax:> ancient_browser I<I<C<string>> ...>
B<context:> I<http>
B<context:> I<server>
B<context:> I<location>
If any of the specified substrings is found in the C<User-Agent>
request header field, the browser will be considered ancient.
The special string “C<netscape4>” corresponds to the
regular expression “C<^MozillaE<sol>[1-4]>”.
=head2 ancient_browser_value
B<syntax:> ancient_browser_value I<I<C<string>>>
B<default:> I<1>
B<context:> I<http>
B<context:> I<server>
B<context:> I<location>
Sets a value for the C<$ancient_browser> variables.
=head2 modern_browser
B<syntax:> modern_browser I<I<C<browser>> I<C<version>>>
B<syntax:> modern_browser I<C<unlisted>>
B<context:> I<http>
B<context:> I<server>
B<context:> I<location>
Specifies a version starting from which a browser is considered modern.
A browser can be any one of the following: C<msie>,
C<gecko> (browsers based on Mozilla),
C<opera>, C<safari>,
or C<konqueror>.
Versions can be specified in the following formats: X, X.X, X.X.X, or X.X.X.X.
The maximum values for each of the format are
4000, 4000.99, 4000.99.99, and 4000.99.99.99, respectively.
The special value C<unlisted> specifies to consider
a browser as modern if it was not listed by the
C<modern_browser> and L</ancient_browser>
directives.
Otherwise such a browser is considered ancient.
If a request does not provide the C<User-Agent> field
in the header, the browser is treated as not being listed.
=head2 modern_browser_value
B<syntax:> modern_browser_value I<I<C<string>>>
B<default:> I<1>
B<context:> I<http>
B<context:> I<server>
B<context:> I<location>
Sets a value for the C<$modern_browser> variables.
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