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/**
* @file llareslistener.cpp
* @author Nat Goodspeed
* @date 2009-03-18
* @brief Implementation for llareslistener.
*
* $LicenseInfo:firstyear=2009&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
// 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().with("uri", LLSD()).with("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)
{
if (mAres)
{
mAres->rewriteURI(data["uri"], new UriRewriteResponder(data));
}
else
{
llinfos << "LLAresListener::rewriteURI requested without Ares present. Ignoring: " << data << llendl;
}
}
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