org.apache.tapestry5.internal.services
Class ResponseCompressionAnalyzerImpl

java.lang.Object
  org.apache.tapestry5.internal.services.ResponseCompressionAnalyzerImpl

All Implemented Interfaces:

ResponseCompressionAnalyzer

public class ResponseCompressionAnalyzerImpl
extends java.lang.Object
implements ResponseCompressionAnalyzer

Constructor Summary

ResponseCompressionAnalyzerImpl(javax.servlet.http.HttpServletRequest request, CompressionAnalyzer analyzer, java.util.Collection<java.lang.String> configuration, boolean gzipCompressionEnabled)

Method Summary

boolean	isCompressable(java.lang.String contentType) Checks to see if the indicated content type is compressable.
boolean	isGZipSupported() Checks the Accept-Encoding request header for a "gzip" token.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResponseCompressionAnalyzerImpl

public ResponseCompressionAnalyzerImpl(javax.servlet.http.HttpServletRequest request,
                                       CompressionAnalyzer analyzer,
                                       @Deprecated
                                       java.util.Collection<java.lang.String> configuration,
                                       @Symbol(value="tapestry.gzip-compression-enabled")
                                       boolean gzipCompressionEnabled)

Method Detail

isGZipSupported

public boolean isGZipSupported()

Description copied from interface: ResponseCompressionAnalyzer

Checks the Accept-Encoding request header for a "gzip" token. Ensures that the protocol is not "HTTP/1.0", which does not correctly support GZip encoding (in older Internet Explorer browsers).

Specified by:

isGZipSupported in interface ResponseCompressionAnalyzer

Returns:

true if gzip is supported by client

isCompressable

public boolean isCompressable(java.lang.String contentType)

Description copied from interface: ResponseCompressionAnalyzer

Checks to see if the indicated content type is compressable. Many formats are already compressed; pushing them through a GZip filter consumes cycles and makes them larger.

Contribute content type strings to the service's configuration to mark them as not compressable.

Specified by:

isCompressable in interface ResponseCompressionAnalyzer

Parameters:

contentType - the mime type of the content, such as "text/html" or "image/jpeg".

Returns:

true if compression is worthwhile