llpluginmessage.cpp
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- /**
- * @file llpluginmessage.cpp
- * @brief LLPluginMessage encapsulates the serialization/deserialization of messages passed to and from plugins.
- *
- * @cond
- * $LicenseInfo:firstyear=2008&license=viewergpl$
- *
- * Copyright (c) 2008-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- * @endcond
- */
- #include "linden_common.h"
- #include "llpluginmessage.h"
- #include "llsdserialize.h"
- #include "u64.h"
- /**
- * Constructor.
- */
- LLPluginMessage::LLPluginMessage()
- {
- }
- /**
- * Constructor.
- *
- * @param[in] p Existing message
- */
- LLPluginMessage::LLPluginMessage(const LLPluginMessage &p)
- {
- mMessage = p.mMessage;
- }
- /**
- * Constructor.
- *
- * @param[in] message_class Message class
- * @param[in] message_name Message name
- */
- LLPluginMessage::LLPluginMessage(const std::string &message_class, const std::string &message_name)
- {
- setMessage(message_class, message_name);
- }
- /**
- * Destructor.
- */
- LLPluginMessage::~LLPluginMessage()
- {
- }
- /**
- * Reset all internal state.
- */
- void LLPluginMessage::clear()
- {
- mMessage = LLSD::emptyMap();
- mMessage["params"] = LLSD::emptyMap();
- }
- /**
- * Sets the message class and name. Also has the side-effect of clearing any key-value pairs in the message.
- *
- * @param[in] message_class Message class
- * @param[in] message_name Message name
- */
- void LLPluginMessage::setMessage(const std::string &message_class, const std::string &message_name)
- {
- clear();
- mMessage["class"] = message_class;
- mMessage["name"] = message_name;
- }
- /**
- * Sets a key/value pair in the message, where the value is a string.
- *
- * @param[in] key Key
- * @param[in] value String value
- */
- void LLPluginMessage::setValue(const std::string &key, const std::string &value)
- {
- mMessage["params"][key] = value;
- }
- /**
- * Sets a key/value pair in the message, where the value is LLSD.
- *
- * @param[in] key Key
- * @param[in] value LLSD value
- */
- void LLPluginMessage::setValueLLSD(const std::string &key, const LLSD &value)
- {
- mMessage["params"][key] = value;
- }
- /**
- * Sets a key/value pair in the message, where the value is signed 32-bit.
- *
- * @param[in] key Key
- * @param[in] value 32-bit signed value
- */
- void LLPluginMessage::setValueS32(const std::string &key, S32 value)
- {
- mMessage["params"][key] = value;
- }
- /**
- * Sets a key/value pair in the message, where the value is unsigned 32-bit. The value is stored as a string beginning with "0x".
- *
- * @param[in] key Key
- * @param[in] value 32-bit unsigned value
- */
- void LLPluginMessage::setValueU32(const std::string &key, U32 value)
- {
- std::stringstream temp;
- temp << "0x" << std::hex << value;
- setValue(key, temp.str());
- }
- /**
- * Sets a key/value pair in the message, where the value is a bool.
- *
- * @param[in] key Key
- * @param[in] value Boolean value
- */
- void LLPluginMessage::setValueBoolean(const std::string &key, bool value)
- {
- mMessage["params"][key] = value;
- }
- /**
- * Sets a key/value pair in the message, where the value is a double.
- *
- * @param[in] key Key
- * @param[in] value Boolean value
- */
- void LLPluginMessage::setValueReal(const std::string &key, F64 value)
- {
- mMessage["params"][key] = value;
- }
- /**
- * Sets a key/value pair in the message, where the value is a pointer. The pointer is stored as a string.
- *
- * @param[in] key Key
- * @param[in] value Pointer value
- */
- void LLPluginMessage::setValuePointer(const std::string &key, void* value)
- {
- std::stringstream temp;
- // iostreams should output pointer values in hex with an initial 0x by default.
- temp << value;
- setValue(key, temp.str());
- }
- /**
- * Gets the message class.
- *
- * @return Message class
- */
- std::string LLPluginMessage::getClass(void) const
- {
- return mMessage["class"];
- }
- /**
- * Gets the message name.
- *
- * @return Message name
- */
- std::string LLPluginMessage::getName(void) const
- {
- return mMessage["name"];
- }
- /**
- * Returns true if the specified key exists in this message (useful for optional parameters).
- *
- * @param[in] key Key
- *
- * @return True if key exists, false otherwise.
- */
- bool LLPluginMessage::hasValue(const std::string &key) const
- {
- bool result = false;
-
- if(mMessage["params"].has(key))
- {
- result = true;
- }
-
- return result;
- }
- /**
- * Gets the value of a key as a string. If the key does not exist, an empty string will be returned.
- *
- * @param[in] key Key
- *
- * @return String value of key if key exists, empty string if key does not exist.
- */
- std::string LLPluginMessage::getValue(const std::string &key) const
- {
- std::string result;
-
- if(mMessage["params"].has(key))
- {
- result = mMessage["params"][key].asString();
- }
-
- return result;
- }
- /**
- * Gets the value of a key as LLSD. If the key does not exist, a null LLSD will be returned.
- *
- * @param[in] key Key
- *
- * @return LLSD value of key if key exists, null LLSD if key does not exist.
- */
- LLSD LLPluginMessage::getValueLLSD(const std::string &key) const
- {
- LLSD result;
- if(mMessage["params"].has(key))
- {
- result = mMessage["params"][key];
- }
-
- return result;
- }
- /**
- * Gets the value of a key as signed 32-bit int. If the key does not exist, 0 will be returned.
- *
- * @param[in] key Key
- *
- * @return Signed 32-bit int value of key if key exists, 0 if key does not exist.
- */
- S32 LLPluginMessage::getValueS32(const std::string &key) const
- {
- S32 result = 0;
- if(mMessage["params"].has(key))
- {
- result = mMessage["params"][key].asInteger();
- }
-
- return result;
- }
- /**
- * Gets the value of a key as unsigned 32-bit int. If the key does not exist, 0 will be returned.
- *
- * @param[in] key Key
- *
- * @return Unsigned 32-bit int value of key if key exists, 0 if key does not exist.
- */
- U32 LLPluginMessage::getValueU32(const std::string &key) const
- {
- U32 result = 0;
- if(mMessage["params"].has(key))
- {
- std::string value = mMessage["params"][key].asString();
-
- result = (U32)strtoul(value.c_str(), NULL, 16);
- }
-
- return result;
- }
- /**
- * Gets the value of a key as a bool. If the key does not exist, false will be returned.
- *
- * @param[in] key Key
- *
- * @return Boolean value of key if it exists, false otherwise.
- */
- bool LLPluginMessage::getValueBoolean(const std::string &key) const
- {
- bool result = false;
- if(mMessage["params"].has(key))
- {
- result = mMessage["params"][key].asBoolean();
- }
-
- return result;
- }
- /**
- * Gets the value of a key as a double. If the key does not exist, 0 will be returned.
- *
- * @param[in] key Key
- *
- * @return Value as a double if key exists, 0 otherwise.
- */
- F64 LLPluginMessage::getValueReal(const std::string &key) const
- {
- F64 result = 0.0f;
- if(mMessage["params"].has(key))
- {
- result = mMessage["params"][key].asReal();
- }
-
- return result;
- }
- /**
- * Gets the value of a key as a pointer. If the key does not exist, NULL will be returned.
- *
- * @param[in] key Key
- *
- * @return Pointer value if key exists, NULL otherwise.
- */
- void* LLPluginMessage::getValuePointer(const std::string &key) const
- {
- void* result = NULL;
- if(mMessage["params"].has(key))
- {
- std::string value = mMessage["params"][key].asString();
-
- result = (void*)llstrtou64(value.c_str(), NULL, 16);
- }
-
- return result;
- }
- /**
- * Flatten the message into a string.
- *
- * @return Message as a string.
- */
- std::string LLPluginMessage::generate(void) const
- {
- std::ostringstream result;
-
- // Pretty XML may be slightly easier to deal with while debugging...
- // LLSDSerialize::toXML(mMessage, result);
- LLSDSerialize::toPrettyXML(mMessage, result);
-
- return result.str();
- }
- /**
- * Parse an incoming message into component parts. Clears all existing state before starting the parse.
- *
- * @return Returns -1 on failure, otherwise returns the number of key/value pairs in the incoming message.
- */
- int LLPluginMessage::parse(const std::string &message)
- {
- // clear any previous state
- clear();
- std::istringstream input(message);
-
- S32 parse_result = LLSDSerialize::fromXML(mMessage, input);
-
- return (int)parse_result;
- }
- /**
- * Destructor
- */
- LLPluginMessageListener::~LLPluginMessageListener()
- {
- // TODO: should listeners have a way to ensure they're removed from dispatcher lists when deleted?
- }
- /**
- * Destructor
- */
- LLPluginMessageDispatcher::~LLPluginMessageDispatcher()
- {
-
- }
-
- /**
- * Add a message listener. TODO:DOC need more info on what uses this. when are multiple listeners needed?
- *
- * @param[in] listener Message listener
- */
- void LLPluginMessageDispatcher::addPluginMessageListener(LLPluginMessageListener *listener)
- {
- mListeners.insert(listener);
- }
- /**
- * Remove a message listener.
- *
- * @param[in] listener Message listener
- */
- void LLPluginMessageDispatcher::removePluginMessageListener(LLPluginMessageListener *listener)
- {
- mListeners.erase(listener);
- }
- /**
- * Distribute a message to all message listeners.
- *
- * @param[in] message Message
- */
- void LLPluginMessageDispatcher::dispatchPluginMessage(const LLPluginMessage &message)
- {
- for (listener_set_t::iterator it = mListeners.begin();
- it != mListeners.end();
- )
- {
- LLPluginMessageListener* listener = *it;
- listener->receivePluginMessage(message);
- // In case something deleted an entry.
- it = mListeners.upper_bound(listener);
- }
- }