Package sunlabs.brazil.filter
Class MD5Filter
java.lang.Object
sunlabs.brazil.filter.MD5Filter
Filter to compute the MD5 checksum of the content, and
generate the appropriate "Content-MD5" http header.
As md5 checksum generation can be expensive, care should be
taken as to which types of content are digested.
The following server properties are used:
- prefix, suffix, glob, match
- Specify the URLs that trigger this filter
(See
MatchString
).
- Version:
- 2.3
- Author:
- Stephen Uhler
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionbyte[]
filter
(Request request, MimeHeaders headers, byte[] content) Compute digest, add to header.boolean
Make sure MD5 is available in this VM, or don't start.boolean
This is the request object before the content was fetched.boolean
shouldFilter
(Request request, MimeHeaders headers) Only filter url's that match.
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Constructor Details
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MD5Filter
public MD5Filter()
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Method Details
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init
Make sure MD5 is available in this VM, or don't start.- Specified by:
init
in interfaceHandler
- Parameters:
server
- The HTTP server that created thisHandler
. TypicalHandler
s will useServer.props
to obtain run-time configuration information.prefix
- The handlers name. The string thisHandler
may prepend to all of the keys that it uses to extract configuration information fromServer.props
. This is set (by theServer
andChainHandler
) to help avoid configuration parameter namespace collisions.- Returns:
true
if thisHandler
initialized successfully,false
otherwise. Iffalse
is returned, thisHandler
should not be used.
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respond
This is the request object before the content was fetched. -
shouldFilter
Only filter url's that match.- Specified by:
shouldFilter
in interfaceFilter
- Parameters:
request
- The in-progress HTTP request.headers
- The MIME headers generated by the wrappedHandler
.- Returns:
true
if this filter would like to examine and possibly rewrite the content,false
otherwise.
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filter
Compute digest, add to header.- Specified by:
filter
in interfaceFilter
- Parameters:
request
- The finished HTTP request.headers
- The MIME headers generated by theHandler
.content
- The output from theHandler
that thisFilter
may rewrite.- Returns:
- The rewritten content. The
Filter
may return the originalcontent
unchanged. TheFilter
may returnnull
to indicate that theFilterHandler
should stop processing the request and should not return any content to the client.
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