/indra/llmessage/llsdmessage.cpp
C++ | 170 lines | 104 code | 11 blank | 55 comment | 7 complexity | 2497ddeafb85cf4daf8df094a029be49 MD5 | raw file
Possible License(s): LGPL-2.1
- /**
- * @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()
- {
- }