org.yestech.lib.web
Class RequestUtils

java.lang.Object
  org.yestech.lib.web.RequestUtils

public final class RequestUtils
extends java.lang.Object

A collection of request processing utilities

Version:

$Revision: $

Author:

Artie Copeland

Method Summary

static boolean	acceptsEncoding(javax.servlet.http.HttpServletRequest request, java.lang.String name) Checks if request accepts the named encoding.
static boolean	acceptsGzipEncoding(javax.servlet.http.HttpServletRequest request) Determine whether the user agent accepts GZIP encoding.
static boolean	headerContains(javax.servlet.http.HttpServletRequest request, java.lang.String header, java.lang.String value) Checks if request contains the header value.
static boolean	isIncluded(javax.servlet.http.HttpServletRequest request) Checks if the request uri is an include.
static java.lang.String	resolveUserIpAddress(javax.servlet.http.HttpServletRequest request) Trys to resolve an clients ip address first by last item in "X-Forwarded-For" HTTP header.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

isIncluded

public static boolean isIncluded(javax.servlet.http.HttpServletRequest request)

Checks if the request uri is an include. These cannot be gzipped.

acceptsGzipEncoding

public static boolean acceptsGzipEncoding(javax.servlet.http.HttpServletRequest request)

Determine whether the user agent accepts GZIP encoding. This feature is part of HTTP1.1. If a browser accepts GZIP encoding it will advertise this by including in its HTTP header:

Accept-Encoding: gzip

Requests which do not accept GZIP encoding fall into the following categories:

• Old browsers, notably IE 5 on Macintosh.
• Internet Explorer through a proxy. By default HTTP1.1 is enabled but disabled when going through a proxy. 90% of non gzip requests seen on the Internet are caused by this.

As of September 2004, about 34% of Internet requests do not accept GZIP encoding.

Parameters:

request -

Returns:

true, if the User Agent request accepts GZIP encoding

acceptsEncoding

public static boolean acceptsEncoding(javax.servlet.http.HttpServletRequest request,
                                      java.lang.String name)

Checks if request accepts the named encoding.

headerContains

public static boolean headerContains(javax.servlet.http.HttpServletRequest request,
                                     java.lang.String header,
                                     java.lang.String value)

Checks if request contains the header value.

Returns:

true if header acc

resolveUserIpAddress

public static java.lang.String resolveUserIpAddress(javax.servlet.http.HttpServletRequest request)

Trys to resolve an clients ip address first by last item in "X-Forwarded-For" HTTP header. If that fails then use ServletRequest.getRemoteAddr().

Parameters:

request - HttpRequest

Returns:

Ip Address