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/**
* @file llareslistener.cpp
* @author Nat Goodspeed
* @date 2009-03-18
* @brief Implementation for llareslistener.
*
* $LicenseInfo:firstyear=2009&license=viewergpl$
* Copyright (c) 2009, Linden Research, Inc.
* $/LicenseInfo$
*/
// Precompiled header
#include "linden_common.h"
// associated header
#include "llareslistener.h"
// STL headers
// std headers
// external library headers
// other Linden headers
#include "llares.h"
#include "llerror.h"
#include "llevents.h"
#include "llsdutil.h"
LLAresListener::LLAresListener(LLAres* llares):
LLEventAPI("LLAres",
"LLAres listener to request DNS operations"),
mAres(llares)
{
// add() every method we want to be able to invoke via this event API.
// Optional last parameter validates expected LLSD request structure.
add("rewriteURI",
"Given [\"uri\"], return on [\"reply\"] an array of alternative URIs.\n"
"On failure, returns an array containing only the original URI, so\n"
"failure case can be processed like success case.",
&LLAresListener::rewriteURI,
LLSD().insert("uri", LLSD()).insert("reply", LLSD()));
}
/// This UriRewriteResponder subclass packages returned URIs as an LLSD
/// array to send back to the requester.
class UriRewriteResponder: public LLAres::UriRewriteResponder
{
public:
/**
* Specify the request, containing the event pump name on which to send
* the reply.
*/
UriRewriteResponder(const LLSD& request):
mReqID(request),
mPumpName(request["reply"])
{}
/// Called by base class with results. This is called in both the
/// success and error cases. On error, the calling logic passes the
/// original URI.
virtual void rewriteResult(const std::vector<std::string>& uris)
{
LLSD result;
for (std::vector<std::string>::const_iterator ui(uris.begin()), uend(uris.end());
ui != uend; ++ui)
{
result.append(*ui);
}
// This call knows enough to avoid trying to insert a map key into an
// LLSD array. It's there so that if, for any reason, we ever decide
// to change the response from array to map, it will Just Start Working.
mReqID.stamp(result);
LLEventPumps::instance().obtain(mPumpName).post(result);
}
private:
LLReqID mReqID;
const std::string mPumpName;
};
void LLAresListener::rewriteURI(const LLSD& data)
{
mAres->rewriteURI(data["uri"], new UriRewriteResponder(data));
}
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