Package sunlabs.brazil.filter
Class ReFilter
- java.lang.Object
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- sunlabs.brazil.filter.ReFilter
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public class ReFilter extends java.lang.Object implements Filter
Filter to replace text content via a reqular expression substitution. SeeRegexp.sub(java.lang.String, java.lang.String)
andRegexp.subAll(java.lang.String, java.lang.String)
.Note: The regular expression processing should be consolodated with the RePollHandler, and the tag_extract... processing.
The following server properties are used:
- re
- The regular expression to match the content
- sub
- The replacement expression. If not specified, the matched content is deleted.
- oneOnly
- If set, only replace the first match. by default, all matches are replaced.
- noCase
- If set, case-insensitive matchins is performed.
- Version:
- 2.4
- Author:
- Stephen Uhler
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Constructor Summary
Constructors Constructor Description ReFilter()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description byte[]
filter(Request request, MimeHeaders headers, byte[] content)
If the content matches the regular expression, do the substitution.boolean
init(Server server, java.lang.String prefix)
Initializes the handler.boolean
respond(Request request)
This is the request object before the content was fetchedboolean
shouldFilter(Request request, MimeHeaders headers)
Only filter text documents
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Method Detail
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init
public boolean init(Server server, java.lang.String prefix)
Description copied from interface:Handler
Initializes the handler.- 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
public boolean respond(Request request)
This is the request object before the content was fetched
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shouldFilter
public boolean shouldFilter(Request request, MimeHeaders headers)
Only filter text documents- 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
public byte[] filter(Request request, MimeHeaders headers, byte[] content)
If the content matches the regular expression, do the substitution. Otherwise, return the original content un-changed.- 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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