Coyote Point Systems E350GX, Руководство по установке и администрированию

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Match Functions
Equalizer Installation and Administration Guide 221
In addition to the functions in the preceding table, a set of functions is provided that allows you to process requests
based on the various components of a request’s destination URI.
A URI has the following parts (as defined in RFC1808):
<scheme>://<hostname>/<path>;<params>?<query>#<fragment>
In addition, Equalizer further breaks up the
<path>
component of the URI into the following components:
<directory><filename>
The following figure illustrates how Equalizer breaks up a URI into the supported components:
Figure 48 URI components
Note that the following components of the URI do not have corresponding match functions:
• Match functions for the
<scheme>
component are not necessary, since a cluster must be configured to
accept only one protocol: HTTP or HTTPS.
• Match functions for the optional
<params>
component are not provided. Use the pathname*() and
filename*() functions to match characters at the end of the path and filename components.
• Match functions for the optional
<fragment>
component are not provided. The fragment portion of a URI
is not transmitted by the browser to the server, but is instead retained by the client and applied after the
reply from the server is received.
The following table lists the URI matching functions that match text in the URI components shown in Figure 48.
header_regex( header , string )
This function evaluates to true if the selected header is present
and if the string-valued argument string , interpreted as a regular
expression, matches the associated header text.
URI Match Function Description
host( string )
This function evaluates to true if the string argument exactly
matches the hostname portion of the request. In the case of HTTP
0.9, the host is a portion of the request URI. All other HTTP protocol
versions require a Host header to specify the host, which would be
compared to the string.
non-URI Match Function Description