日期:2011-02-05  浏览次数:20402 次

<Location> directive
Syntax: <Location URL> ... </Location>
Context: server config, virtual host
Status: core
Compatibility: Location is only available in Apache 1.1 and later.

The <Location> directive provides for access control by URL. It is similar to the <Directory> directive, and starts a subsection which is terminated with a </Location> directive. <Location> sections are processed in the order they appear in the configuration file, after the <Directory> sections and .htaccess files are read, and after the <Files> sections.

Note that URLs do not have to line up with the filesystem at all, it should be emphasized that <Location> operates completely outside the filesystem.

For all origin (non-proxy) requests, the URL to be matched is of the form /path/, and you should not include any http://servername prefix. For proxy requests, the URL to be matched is of the form scheme://servername/path, and you must include the prefix.

The URL may use wildcards In a wild-card string, `?' matches any single character, and `*' matches any sequences of characters.

Apache 1.2 and above: Extended regular expressions can also be used, with the addition of the ~ character. For example:

   <Location ~ "/(extra|special)/data">

would match URLs that contained the substring "/extra/data" or "/special/data". In Apache 1.3 and above, a new directive <LocationMatch> exists which behaves identical to the regex version of <Location>.

The Location functionality is especially useful when combined with the SetHandler directive. For example, to enable status requests, but allow them only from browsers at foo.com, you might use:

    <Location /status>
    SetHandler server-status
    order deny,allow
    deny from all
    allow from .foo.com
    </Location>

Apache 1.3 and above note about / (slash): The slash character has special meaning depending on where in a URL it appears. People may be used to its behaviour in the filesystem where multiple adjacent slashes are frequently collapsed to a single slash (i.e., /home///foo is the same as /home/foo). In URL-space this is not necessarily true. The <LocationMatch> directive and the regex version of <Location> require you to explicitly specify multiple slashes if that is your intention. For example, <LocationMatch ^/abc> would match the request URL /abc but not the request URL //abc. The (non-regex) <Location> directive behaves similarly when used for proxy requests. But when (non-regex) <Location> is used for non-proxy requests it will implicitly match multiple slashes with a single slash. For example, if you specify <Location /abc/def> and the request is to /abc//def then it will match.

See also: How Directory, Location and Files sections work for an explanation of how these different sections are combined when a request is received


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<LocationMatch>
Syntax: <LocationMatch regex> ... </LocationMatch>
Context: server config, virtual host
Status: core
Compatibility: LocationMatch is only available in Apache 1.3 and later.

The <LocationMatch> directive provides for access control by URL, in an identical manner to <Location>. However, it takes a regular expression as an argument instead of a simple string. For example:

   <LocationMatch "/(extra|special)/data">

would match URLs that contained the substring "/extra/data" or "/special/data".

See also: Ho