Class MultiProxyHandler
- All Implemented Interfaces:
Handler
The
GenericProxyHandler
rewrites all of the links in each wepage to point back to the local.
machine. Using this handler, if multiple virtual websites are configured,
then links in one site that point to other virtual web sites are
rewritten to point locally as well.
For example, suppose we have 2 MultiProxyhandlers A and B configured into the server as:
A.prefix=/foo/
A.host=www.foo.com
B.prefix=/bar/
B.host=www.bar.com
.
/foo/bar/test.html
will fetch
http://www.foo.com/bar/test.html
. If the result is
an html page, then any links in that page that resolve to
www.foo.com/...
will be rewritten to the local server
as /foo/...
, and any links that points to
www.bar.com/...
will be rewritten to
/bar/...
.- Version:
- 2.3, 07/03/21
- Author:
- Stephen Uhler
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic Hashtable
Holds all proxy -> prefix mappings for this server.Fields inherited from class sunlabs.brazil.handler.GenericProxyHandler
host, HOST, mapper, NL, noErrorReturn, passHost, port, PORT, prefix, PREFIX, PROXY_HOST, PROXY_PORT, proxyHost, proxyPort, requestPrefix, tokens, urlPrefix
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Constructor Summary
Constructors -
Method Summary
Methods inherited from class sunlabs.brazil.handler.GenericProxyHandler
getMapper, isMine, modifyContent, shouldFilter
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Field Details
-
proxies
Holds all proxy -> prefix mappings for this server.
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Constructor Details
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MultiProxyHandler
public MultiProxyHandler()
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Method Details
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init
Initialize this handler. Add rewrite mapping into the global table. If any "virtual" web sites reference other "virtual" web sites, then rewrite the links accordingly.- Specified by:
init
in interfaceHandler
- Overrides:
init
in classGenericProxyHandler
- 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
Description copied from class:GenericProxyHandler
If this is one of "our" url's, fetch the document from the destination server, and return it as if it was local.- Specified by:
respond
in interfaceHandler
- Overrides:
respond
in classGenericProxyHandler
- Parameters:
request
- TheRequest
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 callingRequest.sendResponse()
orRequest.sendError
.- Throws:
IOException
- if there was an I/O error while sending the response to the client. Typically, in that case, theServer
will (try to) send an error message to the client and then close the client's connection.The
IOException
should not be used to silently ignore problems such as being unable to access some server-side resource (for example getting aFileNotFoundException
due to not being able to open a file). In that case, theHandler
's duty is to turn thatIOException
into a HTTP response indicating, in this case, that a file could not be found.
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