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/**
* @file llsdmessage.cpp
* @author Nat Goodspeed
* @date 2008-10-31
* @brief Implementation for llsdmessage.
*
* $LicenseInfo:firstyear=2008&license=viewerlgpl$
* 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
* $/LicenseInfo$
*/
#if LL_WINDOWS
#pragma warning (disable : 4675) // "resolved by ADL" -- just as I want!
#endif
// Precompiled header
#include "linden_common.h"
// associated header
#include "llsdmessage.h"
// STL headers
// std headers
// external library headers
// other Linden headers
#include "llevents.h"
#include "llsdserialize.h"
#include "llhttpclient.h"
#include "llmessageconfig.h"
#include "llhost.h"
#include "message.h"
#include "llsdutil.h"
// Declare a static LLSDMessage instance to ensure that we have a listener as
// soon as someone tries to post on our canonical LLEventPump name.
static LLSDMessage httpListener;
LLSDMessage::LLSDMessage():
// Instantiating our own local LLEventPump with a string name the
// constructor is NOT allowed to tweak is a way of ensuring Singleton
// semantics: attempting to instantiate a second LLSDMessage object would
// throw LLEventPump::DupPumpName.
mEventPump("LLHTTPClient")
{
mEventPump.listen("self", boost::bind(&LLSDMessage::httpListener, this, _1));
}
bool LLSDMessage::httpListener(const LLSD& request)
{
// Extract what we want from the request object. We do it all up front
// partly to document what we expect.
LLSD::String url(request["url"]);
LLSD payload(request["payload"]);
LLSD::String reply(request["reply"]);
LLSD::String error(request["error"]);
LLSD::Real timeout(request["timeout"]);
// If the LLSD doesn't even have a "url" key, we doubt it was intended for
// this listener.
if (url.empty())
{
std::ostringstream out;
out << "request event without 'url' key to '" << mEventPump.getName() << "'";
throw ArgError(out.str());
}
// Establish default timeout. This test relies on LLSD::asReal() returning
// exactly 0.0 for an undef value.
if (! timeout)
{
timeout = HTTP_REQUEST_EXPIRY_SECS;
}
LLHTTPClient::post(url, payload,
new LLSDMessage::EventResponder(LLEventPumps::instance(),
request,
url, "POST", reply, error),
LLSD(), // headers
timeout);
return false;
}
void LLSDMessage::EventResponder::result(const LLSD& data)
{
// If our caller passed an empty replyPump name, they're not
// listening: this is a fire-and-forget message. Don't bother posting
// to the pump whose name is "".
if (! mReplyPump.empty())
{
LLSD response(data);
mReqID.stamp(response);
mPumps.obtain(mReplyPump).post(response);
}
else // default success handling
{
LL_INFOS("LLSDMessage::EventResponder")
<< "'" << mMessage << "' to '" << mTarget << "' succeeded"
<< LL_ENDL;
}
}
void LLSDMessage::EventResponder::errorWithContent(U32 status, const std::string& reason, const LLSD& content)
{
// If our caller passed an empty errorPump name, they're not
// listening: "default error handling is acceptable." Only post to an
// explicit pump name.
if (! mErrorPump.empty())
{
LLSD info(mReqID.makeResponse());
info["target"] = mTarget;
info["message"] = mMessage;
info["status"] = LLSD::Integer(status);
info["reason"] = reason;
info["content"] = content;
mPumps.obtain(mErrorPump).post(info);
}
else // default error handling
{
// convention seems to be to use llinfos, but that seems a bit casual?
LL_WARNS("LLSDMessage::EventResponder")
<< "'" << mMessage << "' to '" << mTarget
<< "' failed with code " << status << ": " << reason << '\n'
<< ll_pretty_print_sd(content)
<< LL_ENDL;
}
}
LLSDMessage::ResponderAdapter::ResponderAdapter(LLHTTPClient::ResponderPtr responder,
const std::string& name):
mResponder(responder),
mReplyPump(name + ".reply", true), // tweak name for uniqueness
mErrorPump(name + ".error", true)
{
mReplyPump.listen("self", boost::bind(&ResponderAdapter::listener, this, _1, true));
mErrorPump.listen("self", boost::bind(&ResponderAdapter::listener, this, _1, false));
}
bool LLSDMessage::ResponderAdapter::listener(const LLSD& payload, bool success)
{
if (success)
{
mResponder->result(payload);
}
else
{
mResponder->errorWithContent(payload["status"].asInteger(), payload["reason"], payload["content"]);
}
/*---------------- MUST BE LAST STATEMENT BEFORE RETURN ----------------*/
delete this;
// Destruction of mResponder will usually implicitly free its referent as well
/*------------------------- NOTHING AFTER THIS -------------------------*/
return false;
}
void LLSDMessage::link()
{
}
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