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2c48161595b9c7caaa3fe0c128a775238f71b7a8
SingularityViewer/indra/llmessage/llavatarnamecache.cpp
Lirusaito 2c48161595 Make Baker's Group code compile! Thanks Shyotl~ 
Note: Large groups still don't load?!
SimConsole cap is needed for Sim Console, won't work without it, keeping it in!
..But it should work with the new ASync one? Maybe needs tweaks, first?

Also switches opening IMs to the gCacheName->getFullName(id, name) system mentioned earlier, my connection has improved!
And makes the Avatar Picker show display names! Yay! (Rearranged the includes there, alphabetical~)
Also fallback to gCacheName->getFullName(id, name) if getting name fails in the new system.. hopefully this will combat occasional big failures.. but it may not work anyway.. maybe my connection is just awful again
2012-12-04 11:54:54 -05:00

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/**
* @file llavatarnamecache.cpp
* @brief Provides lookup of avatar SLIDs ("bobsmith123") and display names
* ("James Cook") from avatar UUIDs.
*
* $LicenseInfo:firstyear=2010&license=viewerlgpl$
* 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
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "llavatarnamecache.h"
#include "llcachename.h" // we wrap this system
#include "llcontrol.h" // For LLCachedControl
#include "llframetimer.h"
#include "llhttpclient.h"
#include "llsd.h"
#include "llsdserialize.h"
#include <boost/tokenizer.hpp>
#include <map>
#include <set>
namespace LLAvatarNameCache
{
use_display_name_signal_t mUseDisplayNamesSignal;
// Manual override for display names - can disable even if the region
// supports it.
bool sUseDisplayNames = true;
// [RLVa:KB] - Checked: 2010-12-08 (RLVa-1.4.0a) | Added: RLVa-1.2.2c
// RLVa override for display names
bool sForceDisplayNames = false;
// [/RLVa:KB]
// Cache starts in a paused state until we can determine if the
// current region supports display names.
bool sRunning = false;
// Base lookup URL for name service.
// On simulator, loaded from indra.xml
// On viewer, usually a simulator capability (at People API team's request)
// Includes the trailing slash, like "http://pdp60.lindenlab.com:8000/agents/"
std::string sNameLookupURL;
// accumulated agent IDs for next query against service
typedef std::set<LLUUID> ask_queue_t;
ask_queue_t sAskQueue;
// agent IDs that have been requested, but with no reply
// maps agent ID to frame time request was made
typedef std::map<LLUUID, F64> pending_queue_t;
pending_queue_t sPendingQueue;
// Callbacks to fire when we received a name.
// May have multiple callbacks for a single ID, which are
// represented as multiple slots bound to the signal.
// Avoid copying signals via pointers.
typedef std::map<LLUUID, callback_signal_t*> signal_map_t;
signal_map_t sSignalMap;
// names we know about
typedef std::map<LLUUID, LLAvatarName> cache_t;
cache_t sCache;
// Send bulk lookup requests a few times a second at most
// only need per-frame timing resolution
LLFrameTimer sRequestTimer;
/// Maximum time an unrefreshed cache entry is allowed
const F64 MAX_UNREFRESHED_TIME = 20.0 * 60.0;
/// Time when unrefreshed cached names were checked last
static F64 sLastExpireCheck;
//-----------------------------------------------------------------------
// Internal methods
//-----------------------------------------------------------------------
// Handle name response off network.
// Optionally skip adding to cache, used when this is a fallback to the
// legacy name system.
void processName(const LLUUID& agent_id,
const LLAvatarName& av_name,
bool add_to_cache);
void requestNamesViaCapability();
// Legacy name system callback
void legacyNameCallback(const LLUUID& agent_id,
const std::string& full_name,
bool is_group
);
void requestNamesViaLegacy();
// Fill in an LLAvatarName with the legacy name data
void buildLegacyName(const std::string& full_name,
LLAvatarName* av_name);
// Do a single callback to a given slot
void fireSignal(const LLUUID& agent_id,
const callback_slot_t& slot,
const LLAvatarName& av_name);
// Is a request in-flight over the network?
bool isRequestPending(const LLUUID& agent_id);
// Erase expired names from cache
void eraseUnrefreshed();
bool expirationFromCacheControl(AIHTTPReceivedHeaders const& headers, F64* expires);
}
/* Sample response:
<?xml version="1.0"?>
<llsd>
<map>
<key>agents</key>
<array>
<map>
<key>display_name_next_update</key>
<date>2010-04-16T21:34:02+00:00Z</date>
<key>display_name_expires</key>
<date>2010-04-16T21:32:26.142178+00:00Z</date>
<key>display_name</key>
<string>MickBot390 LLQABot</string>
<key>sl_id</key>
<string>mickbot390.llqabot</string>
<key>id</key>
<string>0012809d-7d2d-4c24-9609-af1230a37715</string>
<key>is_display_name_default</key>
<boolean>false</boolean>
</map>
<map>
<key>display_name_next_update</key>
<date>2010-04-16T21:34:02+00:00Z</date>
<key>display_name_expires</key>
<date>2010-04-16T21:32:26.142178+00:00Z</date>
<key>display_name</key>
<string>Bjork Gudmundsdottir</string>
<key>sl_id</key>
<string>sardonyx.linden</string>
<key>id</key>
<string>3941037e-78ab-45f0-b421-bd6e77c1804d</string>
<key>is_display_name_default</key>
<boolean>true</boolean>
</map>
</array>
</map>
</llsd>
*/
class AIHTTPTimeoutPolicy;
extern AIHTTPTimeoutPolicy avatarNameResponder_timeout;
class LLAvatarNameResponder : public LLHTTPClient::ResponderWithResult
{
private:
// need to store agent ids that are part of this request in case of
// an error, so we can flag them as unavailable
std::vector<LLUUID> mAgentIDs;
// Need the headers to look up Expires: and Retry-After:
virtual bool needsHeaders(void) const { return true; }
public:
virtual AIHTTPTimeoutPolicy const& getHTTPTimeoutPolicy(void) const { return avatarNameResponder_timeout; }
LLAvatarNameResponder(const std::vector<LLUUID>& agent_ids)
: mAgentIDs(agent_ids)
{ }
/*virtual*/ void result(const LLSD& content)
{
// Pull expiration out of headers if available
F64 expires = LLAvatarNameCache::nameExpirationFromHeaders(mReceivedHeaders);
F64 now = LLFrameTimer::getTotalSeconds();
LLSD agents = content["agents"];
LLSD::array_const_iterator it = agents.beginArray();
for ( ; it != agents.endArray(); ++it)
{
const LLSD& row = *it;
LLUUID agent_id = row["id"].asUUID();
LLAvatarName av_name;
av_name.fromLLSD(row);
// Use expiration time from header
av_name.mExpires = expires;
// Some avatars don't have explicit display names set
if (av_name.mDisplayName.empty())
{
av_name.mDisplayName = av_name.mUsername;
}
LL_DEBUGS("AvNameCache") << "LLAvatarNameResponder::result for " << agent_id << " "
<< "user '" << av_name.mUsername << "' "
<< "display '" << av_name.mDisplayName << "' "
<< "expires in " << expires - now << " seconds"
<< LL_ENDL;
// cache it and fire signals
LLAvatarNameCache::processName(agent_id, av_name, true);
}
// Same logic as error response case
LLSD unresolved_agents = content["bad_ids"];
S32 num_unresolved = unresolved_agents.size();
if (num_unresolved > 0)
{
LL_WARNS("AvNameCache") << "LLAvatarNameResponder::result " << num_unresolved << " unresolved ids; "
<< "expires in " << expires - now << " seconds"
<< LL_ENDL;
it = unresolved_agents.beginArray();
for ( ; it != unresolved_agents.endArray(); ++it)
{
const LLUUID& agent_id = *it;
LL_WARNS("AvNameCache") << "LLAvatarNameResponder::result "
<< "failed id " << agent_id
<< LL_ENDL;
LLAvatarNameCache::handleAgentError(agent_id);
}
}
LL_DEBUGS("AvNameCache") << "LLAvatarNameResponder::result "
<< LLAvatarNameCache::sCache.size() << " cached names"
<< LL_ENDL;
}
/*virtual*/ void error(U32 status, const std::string& reason)
{
// If there's an error, it might be caused by PeopleApi,
// or when loading textures on startup and using a very slow
// network, this query may time out.
// What we should do depends on whether or not we have a cached name
LL_WARNS("AvNameCache") << "LLAvatarNameResponder::error " << status << " " << reason
<< LL_ENDL;
// Add dummy records for any agent IDs in this request that we do not have cached already
std::vector<LLUUID>::const_iterator it = mAgentIDs.begin();
for ( ; it != mAgentIDs.end(); ++it)
{
const LLUUID& agent_id = *it;
LLAvatarNameCache::handleAgentError(agent_id);
}
}
};
// Provide some fallback for agents that return errors
void LLAvatarNameCache::handleAgentError(const LLUUID& agent_id)
{
std::map<LLUUID,LLAvatarName>::iterator existing = sCache.find(agent_id);
if (existing == sCache.end())
{
// there is no existing cache entry, so make a temporary name from legacy
LL_WARNS("AvNameCache") << "LLAvatarNameCache get legacy for agent "
<< agent_id << LL_ENDL;
gCacheName->get(agent_id, false, // legacy compatibility
boost::bind(&LLAvatarNameCache::legacyNameCallback,
_1, _2, _3));
}
else
{
// we have a chached (but probably expired) entry - since that would have
// been returned by the get method, there is no need to signal anyone
// Clear this agent from the pending list
LLAvatarNameCache::sPendingQueue.erase(agent_id);
const LLAvatarName& av_name = existing->second;
LL_DEBUGS("AvNameCache") << "LLAvatarNameCache use cache for agent "
<< agent_id
<< "user '" << av_name.mUsername << "' "
<< "display '" << av_name.mDisplayName << "' "
<< "expires in " << av_name.mExpires - LLFrameTimer::getTotalSeconds() << " seconds"
<< LL_ENDL;
}
}
void LLAvatarNameCache::processName(const LLUUID& agent_id,
const LLAvatarName& av_name,
bool add_to_cache)
{
if (add_to_cache)
{
// sCache[agent_id] = av_name;
// [SL:KB] - Patch: Agent-DisplayNames | Checked: 2010-12-28 (Catznip-2.4.0h) | Added: Catznip-2.4.0h
// Don't replace existing entries with dummies
cache_t::iterator itName = (av_name.mIsTemporaryName) ? sCache.find(agent_id) : sCache.end();
if (sCache.end() != itName)
itName->second.mExpires = av_name.mExpires;
else
sCache[agent_id] = av_name;
// [/SL:KB]
}
sPendingQueue.erase(agent_id);
// signal everyone waiting on this name
signal_map_t::iterator sig_it = sSignalMap.find(agent_id);
if (sig_it != sSignalMap.end())
{
callback_signal_t* signal = sig_it->second;
(*signal)(agent_id, av_name);
sSignalMap.erase(agent_id);
delete signal;
signal = NULL;
}
}
void LLAvatarNameCache::requestNamesViaCapability()
{
F64 now = LLFrameTimer::getTotalSeconds();
// URL format is like:
// http://pdp60.lindenlab.com:8000/agents/?ids=3941037e-78ab-45f0-b421-bd6e77c1804d&ids=0012809d-7d2d-4c24-9609-af1230a37715&ids=0019aaba-24af-4f0a-aa72-6457953cf7f0
//
// Apache can handle URLs of 4096 chars, but let's be conservative
const U32 NAME_URL_MAX = 4096;
const U32 NAME_URL_SEND_THRESHOLD = 3000;
std::string url;
url.reserve(NAME_URL_MAX);
std::vector<LLUUID> agent_ids;
agent_ids.reserve(128);
U32 ids = 0;
ask_queue_t::const_iterator it = sAskQueue.begin();
for ( ; it != sAskQueue.end(); ++it)
{
const LLUUID& agent_id = *it;
if (url.empty())
{
// ...starting new request
url += sNameLookupURL;
url += "?ids=";
ids = 1;
}
else
{
// ...continuing existing request
url += "&ids=";
ids++;
}
url += agent_id.asString();
agent_ids.push_back(agent_id);
// mark request as pending
sPendingQueue[agent_id] = now;
if (url.size() > NAME_URL_SEND_THRESHOLD)
{
LL_DEBUGS("AvNameCache") << "LLAvatarNameCache::requestNamesViaCapability first "
<< ids << " ids"
<< LL_ENDL;
LLHTTPClient::get(url, new LLAvatarNameResponder(agent_ids));
url.clear();
agent_ids.clear();
}
}
if (!url.empty())
{
LL_DEBUGS("AvNameCache") << "LLAvatarNameCache::requestNamesViaCapability all "
<< ids << " ids"
<< LL_ENDL;
LLHTTPClient::get(url, new LLAvatarNameResponder(agent_ids));
url.clear();
agent_ids.clear();
}
// We've moved all asks to the pending request queue
sAskQueue.clear();
}
void LLAvatarNameCache::legacyNameCallback(const LLUUID& agent_id,
const std::string& full_name,
bool is_group)
{
// Construct a dummy record for this name. By convention, SLID is blank
// Never expires, but not written to disk, so lasts until end of session.
LLAvatarName av_name;
LL_DEBUGS("AvNameCache") << "LLAvatarNameCache::legacyNameCallback "
<< "agent " << agent_id << " "
<< "full name '" << full_name << "'"
<< ( is_group ? " [group]" : "" )
<< LL_ENDL;
buildLegacyName(full_name, &av_name);
// Don't add to cache, the data already exists in the legacy name system
// cache and we don't want or need duplicate storage, because keeping the
// two copies in sync is complex.
processName(agent_id, av_name, false);
}
void LLAvatarNameCache::requestNamesViaLegacy()
{
F64 now = LLFrameTimer::getTotalSeconds();
std::string full_name;
ask_queue_t::const_iterator it = sAskQueue.begin();
for (; it != sAskQueue.end(); ++it)
{
const LLUUID& agent_id = *it;
// Mark as pending first, just in case the callback is immediately
// invoked below. This should never happen in practice.
sPendingQueue[agent_id] = now;
LL_DEBUGS("AvNameCache") << "LLAvatarNameCache::requestNamesViaLegacy agent " << agent_id << LL_ENDL;
gCacheName->get(agent_id, false, // legacy compatibility
boost::bind(&LLAvatarNameCache::legacyNameCallback,
_1, _2, _3));
}
// We've either answered immediately or moved all asks to the
// pending queue
sAskQueue.clear();
}
void LLAvatarNameCache::initClass(bool running)
{
sRunning = running;
}
void LLAvatarNameCache::cleanupClass()
{
}
void LLAvatarNameCache::importFile(std::istream& istr)
{
LLSD data;
S32 parse_count = LLSDSerialize::fromXMLDocument(data, istr);
if (parse_count < 1) return;
// by convention LLSD storage is a map
// we only store one entry in the map
LLSD agents = data["agents"];
LLUUID agent_id;
LLAvatarName av_name;
LLSD::map_const_iterator it = agents.beginMap();
for ( ; it != agents.endMap(); ++it)
{
agent_id.set(it->first);
av_name.fromLLSD( it->second );
sCache[agent_id] = av_name;
}
LL_INFOS("AvNameCache") << "loaded " << sCache.size() << LL_ENDL;
// Some entries may have expired since the cache was stored,
// but they will be flushed in the first call to eraseUnrefreshed
// from LLAvatarNameResponder::idle
}
void LLAvatarNameCache::exportFile(std::ostream& ostr)
{
LLSD agents;
F64 max_unrefreshed = LLFrameTimer::getTotalSeconds() - MAX_UNREFRESHED_TIME;
cache_t::const_iterator it = sCache.begin();
for ( ; it != sCache.end(); ++it)
{
const LLUUID& agent_id = it->first;
const LLAvatarName& av_name = it->second;
// Do not write temporary or expired entries to the stored cache
if (!av_name.mIsTemporaryName && av_name.mExpires >= max_unrefreshed)
{
// key must be a string
agents[agent_id.asString()] = av_name.asLLSD();
}
}
LLSD data;
data["agents"] = agents;
LLSDSerialize::toPrettyXML(data, ostr);
}
void LLAvatarNameCache::setNameLookupURL(const std::string& name_lookup_url)
{
sNameLookupURL = name_lookup_url;
}
bool LLAvatarNameCache::hasNameLookupURL()
{
return !sNameLookupURL.empty();
}
void LLAvatarNameCache::idle()
{
// By convention, start running at first idle() call
sRunning = true;
// *TODO: Possibly re-enabled this based on People API load measurements
// 100 ms is the threshold for "user speed" operations, so we can
// stall for about that long to batch up requests.
//const F32 SECS_BETWEEN_REQUESTS = 0.1f;
//if (!sRequestTimer.checkExpirationAndReset(SECS_BETWEEN_REQUESTS))
//{
// return;
//}
if (!sAskQueue.empty())
{
if (useDisplayNames())
{
requestNamesViaCapability();
}
else
{
// ...fall back to legacy name cache system
requestNamesViaLegacy();
}
}
// erase anything that has not been refreshed for more than MAX_UNREFRESHED_TIME
eraseUnrefreshed();
}
bool LLAvatarNameCache::isRequestPending(const LLUUID& agent_id)
{
bool isPending = false;
const F64 PENDING_TIMEOUT_SECS = 5.0 * 60.0;
pending_queue_t::const_iterator it = sPendingQueue.find(agent_id);
if (it != sPendingQueue.end())
{
// in the list of requests in flight, retry if too old
F64 expire_time = LLFrameTimer::getTotalSeconds() - PENDING_TIMEOUT_SECS;
isPending = (it->second > expire_time);
}
return isPending;
}
void LLAvatarNameCache::eraseUnrefreshed()
{
F64 now = LLFrameTimer::getTotalSeconds();
F64 max_unrefreshed = now - MAX_UNREFRESHED_TIME;
if (!sLastExpireCheck || sLastExpireCheck < max_unrefreshed)
{
sLastExpireCheck = now;
for (cache_t::iterator it = sCache.begin(); it != sCache.end();)
{
const LLAvatarName& av_name = it->second;
if (av_name.mExpires < max_unrefreshed)
{
const LLUUID& agent_id = it->first;
LL_DEBUGS("AvNameCache") << agent_id
<< " user '" << av_name.mUsername << "' "
<< "expired " << now - av_name.mExpires << " secs ago"
<< LL_ENDL;
sCache.erase(it++);
}
else
{
++it;
}
}
LL_INFOS("AvNameCache") << sCache.size() << " cached avatar names" << LL_ENDL;
}
}
void LLAvatarNameCache::buildLegacyName(const std::string& full_name,
LLAvatarName* av_name)
{
llassert(av_name);
av_name->mUsername = "";
av_name->mDisplayName = full_name;
av_name->mIsDisplayNameDefault = true;
av_name->mIsTemporaryName = true;
av_name->mExpires = F64_MAX; // not used because these are not cached
LL_DEBUGS("AvNameCache") << "LLAvatarNameCache::buildLegacyName "
<< full_name
<< LL_ENDL;
// [Ansariel/Henri]
// Why ain't those set? In case of disabled display names
// we would have to parse LLAvatarName::mDisplayName to get
// first and lastname if we need them. So do it already here
// for convenience.
std::istringstream fname(full_name);
fname >> av_name->mLegacyFirstName >> av_name->mLegacyLastName;
// [/Ansariel/Henri]
}
// fills in av_name if it has it in the cache, even if expired (can check expiry time)
// returns bool specifying if av_name was filled, false otherwise
bool LLAvatarNameCache::get(const LLUUID& agent_id, LLAvatarName *av_name)
{
if (sRunning)
{
// ...only do immediate lookups when cache is running
if (useDisplayNames())
{
// ...use display names cache
std::map<LLUUID,LLAvatarName>::iterator it = sCache.find(agent_id);
if (it != sCache.end())
{
*av_name = it->second;
// re-request name if entry is expired
if (av_name->mExpires < LLFrameTimer::getTotalSeconds())
{
if (!isRequestPending(agent_id))
{
LL_DEBUGS("AvNameCache") << "LLAvatarNameCache::get "
<< "refresh agent " << agent_id
<< LL_ENDL;
sAskQueue.insert(agent_id);
}
}
return true;
}
}
else
{
// ...use legacy names cache
std::string full_name;
if (gCacheName->getFullName(agent_id, full_name))
{
buildLegacyName(full_name, av_name);
return true;
}
}
}
if (!isRequestPending(agent_id))
{
LL_DEBUGS("AvNameCache") << "LLAvatarNameCache::get "
<< "queue request for agent " << agent_id
<< LL_ENDL;
sAskQueue.insert(agent_id);
}
return false;
}
// Return true when name has been set to Phoenix Name System Name, if not return false.
bool LLAvatarNameCache::getPNSName(const LLUUID& agent_id, std::string& name)
{
static LLCachedControl<S32> phoenix_name_system("PhoenixNameSystem", 0);
LLAvatarName avatar_name;
if (LLAvatarNameCache::get(agent_id, &avatar_name))
{
switch (phoenix_name_system)
{
case 0 : name = avatar_name.getLegacyName(); break;
case 1 : name = avatar_name.getCompleteName(); break;
case 2 : name = avatar_name.mDisplayName; break;
default : name = avatar_name.getLegacyName(); break;
}
return true;
}
if (gCacheName->getFullName(agent_id, name)) //We've failed, try to get the legacy name anyway
return false; //Legacy name is still a failure, it's not a PNSName, afterall.
return false;
}
void LLAvatarNameCache::fireSignal(const LLUUID& agent_id,
const callback_slot_t& slot,
const LLAvatarName& av_name)
{
callback_signal_t signal;
signal.connect(slot);
signal(agent_id, av_name);
}
void LLAvatarNameCache::get(const LLUUID& agent_id, callback_slot_t slot)
{
if (sRunning)
{
// ...only do immediate lookups when cache is running
if (useDisplayNames())
{
// ...use new cache
std::map<LLUUID,LLAvatarName>::iterator it = sCache.find(agent_id);
if (it != sCache.end())
{
const LLAvatarName& av_name = it->second;
if (av_name.mExpires > LLFrameTimer::getTotalSeconds())
{
// ...name already exists in cache, fire callback now
fireSignal(agent_id, slot, av_name);
return;
}
}
}
else
{
// ...use old name system
std::string full_name;
if (gCacheName->getFullName(agent_id, full_name))
{
LLAvatarName av_name;
buildLegacyName(full_name, &av_name);
fireSignal(agent_id, slot, av_name);
return;
}
}
}
// schedule a request
if (!isRequestPending(agent_id))
{
sAskQueue.insert(agent_id);
}
// always store additional callback, even if request is pending
signal_map_t::iterator sig_it = sSignalMap.find(agent_id);
if (sig_it == sSignalMap.end())
{
// ...new callback for this id
callback_signal_t* signal = new callback_signal_t();
signal->connect(slot);
sSignalMap[agent_id] = signal;
}
else
{
// ...existing callback, bind additional slot
callback_signal_t* signal = sig_it->second;
signal->connect(slot);
}
}
// [RLVa:KB] - Checked: 2010-12-08 (RLVa-1.4.0a) | Added: RLVa-1.2.2c
bool LLAvatarNameCache::getForceDisplayNames()
{
return sForceDisplayNames;
}
void LLAvatarNameCache::setForceDisplayNames(bool force)
{
sForceDisplayNames = force;
if ( (!sUseDisplayNames) && (force) )
{
setUseDisplayNames(true);
}
}
// [/RLVa:KB]
void LLAvatarNameCache::setUseDisplayNames(bool use)
{
// [RLVa:KB] - Checked: 2010-12-08 (RLVa-1.4.0a) | Added: RLVa-1.2.2c
// We need to force the use of the "display names" cache when @shownames=n restricted (and disallow toggling it)
use |= getForceDisplayNames();
// [/RLVa:KB]
if (use != sUseDisplayNames)
{
sUseDisplayNames = use;
// flush our cache
sCache.clear();
mUseDisplayNamesSignal();
}
}
bool LLAvatarNameCache::useDisplayNames()
{
// Must be both manually set on and able to look up names.
return sUseDisplayNames && !sNameLookupURL.empty();
}
void LLAvatarNameCache::erase(const LLUUID& agent_id)
{
sCache.erase(agent_id);
}
void LLAvatarNameCache::fetch(const LLUUID& agent_id)
{
// re-request, even if request is already pending
sAskQueue.insert(agent_id);
}
void LLAvatarNameCache::insert(const LLUUID& agent_id, const LLAvatarName& av_name)
{
// *TODO: update timestamp if zero?
sCache[agent_id] = av_name;
}
F64 LLAvatarNameCache::nameExpirationFromHeaders(AIHTTPReceivedHeaders const& headers)
{
F64 expires;
expirationFromCacheControl(headers, &expires);
return expires;
}
bool LLAvatarNameCache::expirationFromCacheControl(AIHTTPReceivedHeaders const& headers, F64* expires)
{
bool fromCacheControl = false;
S32 max_age = 3600; // With no expiration info, default to an hour.
F64 now = LLFrameTimer::getTotalSeconds();
// Allow the header to override the default
std::string cache_control;
if (headers.getFirstValue("cache-control", cache_control))
{
if (max_age_from_cache_control(cache_control, &max_age))
{
fromCacheControl = true;
}
}
*expires = now + (F64)max_age;
LL_DEBUGS("AvNameCache")
<< ( fromCacheControl ? "expires based on cache control " : "default expiration " )
<< "in " << *expires - now << " seconds"
<< LL_ENDL;
return fromCacheControl;
}
void LLAvatarNameCache::addUseDisplayNamesCallback(const use_display_name_signal_t::slot_type& cb)
{
mUseDisplayNamesSignal.connect(cb);
}
static const std::string MAX_AGE("max-age");
static const boost::char_separator<char> EQUALS_SEPARATOR("=");
static const boost::char_separator<char> COMMA_SEPARATOR(",");
bool max_age_from_cache_control(const std::string& cache_control, S32 *max_age)
{
// Split the string on "," to get a list of directives
typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
tokenizer directives(cache_control, COMMA_SEPARATOR);
tokenizer::iterator token_it = directives.begin();
for ( ; token_it != directives.end(); ++token_it)
{
// Tokens may have leading or trailing whitespace
std::string token = *token_it;
LLStringUtil::trim(token);
if (token.compare(0, MAX_AGE.size(), MAX_AGE) == 0)
{
// ...this token starts with max-age, so let's chop it up by "="
tokenizer subtokens(token, EQUALS_SEPARATOR);
tokenizer::iterator subtoken_it = subtokens.begin();
// Must have a token
if (subtoken_it == subtokens.end()) return false;
std::string subtoken = *subtoken_it;
// Must exactly equal "max-age"
LLStringUtil::trim(subtoken);
if (subtoken != MAX_AGE) return false;
// Must have another token
++subtoken_it;
if (subtoken_it == subtokens.end()) return false;
subtoken = *subtoken_it;
// Must be a valid integer
// *NOTE: atoi() returns 0 for invalid values, so we have to
// check the string first.
// *TODO: Do servers ever send "0000" for zero? We don't handle it
LLStringUtil::trim(subtoken);
if (subtoken == "0")
{
*max_age = 0;
return true;
}
S32 val = atoi( subtoken.c_str() );
if (val > 0 && val < S32_MAX)
{
*max_age = val;
return true;
}
return false;
}
}
return false;
}
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