sunlabs.brazil.filter
Class CopyContentFilter

java.lang.Object
  sunlabs.brazil.filter.CopyContentFilter (view source)

All Implemented Interfaces:

Filter, Handler

public class CopyContentFilter
extends Object
implements Filter

Filter to save content (of an entire site) to a disk file. This is used to "steal" other sites. It is expected to be used in conjunction with a GenericProxyHandler. Only files that don't already exist on the local file system are saved. Properties:

directoryName

The root in the file system to save the content in

Constructor Summary

CopyContentFilter()

Method Summary

byte[]	filter(Request request, MimeHeaders headers, byte[] content) Grab the contents, and save as a file (if file doesn't already exist).
boolean	init(Server server, String prefix) Initializes the handler.
boolean	respond(Request request) This is the request object before the content was fetched
boolean	shouldFilter(Request request, MimeHeaders headers) Watch every document that passes by.

Methods inherited from class java.lang.Object

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

Constructor Detail

CopyContentFilter

public CopyContentFilter()

Method Detail

init

public boolean init(Server server,
                    String prefix)

Description copied from interface: Handler

Initializes the handler.

Specified by:

init in interface Handler

Parameters:

server - The HTTP server that created this Handler. Typical Handlers will use Server.props to obtain run-time configuration information.

prefix - The handlers name. The string this Handler may prepend to all of the keys that it uses to extract configuration information from Server.props. This is set (by the Server and ChainHandler) to help avoid configuration parameter namespace collisions.

Returns:

true if this Handler initialized successfully, false otherwise. If false is returned, this Handler should not be used.

respond

public boolean respond(Request request)

This is the request object before the content was fetched

Specified by:

respond in interface Handler

Parameters:

request - The Request object that represents the HTTP request.

Returns:

true if the request was handled. A request was handled if a response was supplied to the client, typically by calling Request.sendResponse() or Request.sendError.

shouldFilter

public boolean shouldFilter(Request request,
                            MimeHeaders headers)

Watch every document that passes by. If the HTTP rerun code is "200", plan to save the content on the local file system.

Specified by:

shouldFilter in interface Filter

Parameters:

request - The in-progress HTTP request.

headers - The MIME headers generated by the wrapped Handler.

Returns:

true if this filter would like to examine and possibly rewrite the content, false otherwise.

filter

public byte[] filter(Request request,
                     MimeHeaders headers,
                     byte[] content)

Grab the contents, and save as a file (if file doesn't already exist). The URL is mapped into a pathname starting from directoryName .

Specified by:

filter in interface Filter

Parameters:

request - The finished HTTP request.

headers - The MIME headers generated by the Handler.

content - The output from the Handler that this Filter may rewrite.

Returns:

The rewritten content. The Filter may return the original content unchanged. The Filter may return null to indicate that the FilterHandler should stop processing the request and should not return any content to the client.