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Diffstat (limited to 'indra/llmessage/llavatarnamecache.cpp')
| -rw-r--r-- | indra/llmessage/llavatarnamecache.cpp | 795 |
1 files changed, 795 insertions, 0 deletions
diff --git a/indra/llmessage/llavatarnamecache.cpp b/indra/llmessage/llavatarnamecache.cpp new file mode 100644 index 0000000000..912f34fcae --- /dev/null +++ b/indra/llmessage/llavatarnamecache.cpp @@ -0,0 +1,795 @@ +/** + * @file llavatarnamecache.cpp + * @brief Provides lookup of avatar SLIDs ("bobsmith123") and display names + * ("James Cook") from avatar UUIDs. + * + * $LicenseInfo:firstyear=2010&license=viewergpl$ + * + * Copyright (c) 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. + * $/LicenseInfo$ + */ +#include "linden_common.h" + +#include "llavatarnamecache.h" + +#include "llcachename.h" // we wrap this system +#include "llframetimer.h" +#include "llhttpclient.h" +#include "llsd.h" +#include "llsdserialize.h" + +#include <boost/tokenizer.hpp> + +#include <map> +#include <set> + +namespace LLAvatarNameCache +{ + // Manual override for display names - can disable even if the region + // supports it. + bool sUseDisplayNames = true; + + // 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; + + // Periodically clean out expired entries from the cache + LLFrameTimer sEraseExpiredTimer; + + //----------------------------------------------------------------------- + // 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 eraseExpired(); + + bool expirationFromCacheControl(LLSD 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 LLAvatarNameResponder : public LLHTTPClient::Responder +{ +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: + LLSD mHeaders; + +public: + LLAvatarNameResponder(const std::vector<LLUUID>& agent_ids) + : mAgentIDs(agent_ids), + mHeaders() + { } + + /*virtual*/ void completedHeader(U32 status, const std::string& reason, + const LLSD& headers) + { + mHeaders = headers; + } + + /*virtual*/ void result(const LLSD& content) + { + // Pull expiration out of headers if available + F64 expires = LLAvatarNameCache::nameExpirationFromHeaders(mHeaders); + + 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; + } + + // cache it and fire signals + LLAvatarNameCache::processName(agent_id, av_name, true); + } + + // Same logic as error response case + LLSD unresolved_agents = content["bad_ids"]; + if (unresolved_agents.size() > 0) + { + const std::string DUMMY_NAME("\?\?\?"); + LLAvatarName av_name; + av_name.mUsername = DUMMY_NAME; + av_name.mDisplayName = DUMMY_NAME; + av_name.mIsDisplayNameDefault = false; + av_name.mIsDummy = true; + av_name.mExpires = expires; + + it = unresolved_agents.beginArray(); + for ( ; it != unresolved_agents.endArray(); ++it) + { + const LLUUID& agent_id = *it; + // cache it and fire signals + LLAvatarNameCache::processName(agent_id, av_name, true); + } + } + } + + /*virtual*/ void error(U32 status, const std::string& reason) + { + // We're going to construct a dummy record and cache it for a while, + // either briefly for a 503 Service Unavailable, or longer for other + // errors. + F64 retry_timestamp = errorRetryTimestamp(status); + + // *NOTE: "??" starts trigraphs in C/C++, escape the question marks. + const std::string DUMMY_NAME("\?\?\?"); + LLAvatarName av_name; + av_name.mUsername = DUMMY_NAME; + av_name.mDisplayName = DUMMY_NAME; + av_name.mIsDisplayNameDefault = false; + av_name.mIsDummy = true; + av_name.mExpires = retry_timestamp; + + // Add dummy records for all agent IDs in this request + std::vector<LLUUID>::const_iterator it = mAgentIDs.begin(); + for ( ; it != mAgentIDs.end(); ++it) + { + const LLUUID& agent_id = *it; + // cache it and fire signals + LLAvatarNameCache::processName(agent_id, av_name, true); + } + } + + // Return time to retry a request that generated an error, based on + // error type and headers. Return value is seconds-since-epoch. + F64 errorRetryTimestamp(S32 status) + { + F64 now = LLFrameTimer::getTotalSeconds(); + + // Retry-After takes priority + LLSD retry_after = mHeaders["retry-after"]; + if (retry_after.isDefined()) + { + // We only support the delta-seconds type + S32 delta_seconds = retry_after.asInteger(); + if (delta_seconds > 0) + { + // ...valid delta-seconds + return now + F64(delta_seconds); + } + } + + // If no Retry-After, look for Cache-Control max-age + F64 expires = 0.0; + if (LLAvatarNameCache::expirationFromCacheControl(mHeaders, &expires)) + { + return expires; + } + + // No information in header, make a guess + if (status == 503) + { + // ...service unavailable, retry soon + const F64 SERVICE_UNAVAILABLE_DELAY = 600.0; // 10 min + return now + SERVICE_UNAVAILABLE_DELAY; + } + else + { + // ...other unexpected error + const F64 DEFAULT_DELAY = 3600.0; // 1 hour + return now + DEFAULT_DELAY; + } + } +}; + +void LLAvatarNameCache::processName(const LLUUID& agent_id, + const LLAvatarName& av_name, + bool add_to_cache) +{ + if (add_to_cache) + { + sCache[agent_id] = av_name; + } + + 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); + + 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="; + } + else + { + // ...continuing existing request + url += "&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) + { + //llinfos << "requestNames " << url << llendl; + LLHTTPClient::get(url, new LLAvatarNameResponder(agent_ids)); + url.clear(); + agent_ids.clear(); + } + } + + if (!url.empty()) + { + //llinfos << "requestNames " << url << llendl; + 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; + 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; + + 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; + } + // entries may have expired since we last ran the viewer, just + // clean them out now + eraseExpired(); + llinfos << "loaded " << sCache.size() << llendl; +} + +void LLAvatarNameCache::exportFile(std::ostream& ostr) +{ + LLSD agents; + cache_t::const_iterator it = sCache.begin(); + for ( ; it != sCache.end(); ++it) + { + const LLUUID& agent_id = it->first; + const LLAvatarName& av_name = it->second; + if (!av_name.mIsDummy) + { + // 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; + //} + + // Must be large relative to above + const F32 ERASE_EXPIRED_TIMEOUT = 60.f; // seconds + if (sEraseExpiredTimer.checkExpirationAndReset(ERASE_EXPIRED_TIMEOUT)) + { + eraseExpired(); + } + + if (sAskQueue.empty()) + { + return; + } + + if (useDisplayNames()) + { + requestNamesViaCapability(); + } + else + { + // ...fall back to legacy name cache system + requestNamesViaLegacy(); + } +} + +bool LLAvatarNameCache::isRequestPending(const LLUUID& agent_id) +{ + const F64 PENDING_TIMEOUT_SECS = 5.0 * 60.0; + F64 now = LLFrameTimer::getTotalSeconds(); + F64 expire_time = now - PENDING_TIMEOUT_SECS; + + pending_queue_t::const_iterator it = sPendingQueue.find(agent_id); + if (it != sPendingQueue.end()) + { + bool request_expired = (it->second < expire_time); + return !request_expired; + } + return false; +} + +void LLAvatarNameCache::eraseExpired() +{ + F64 now = LLFrameTimer::getTotalSeconds(); + cache_t::iterator it = sCache.begin(); + while (it != sCache.end()) + { + cache_t::iterator cur = it; + ++it; + const LLAvatarName& av_name = cur->second; + if (av_name.mExpires < now) + { + sCache.erase(cur); + } + } +} + +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->mIsDummy = true; + av_name->mExpires = F64_MAX; +} + +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; + 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)) + { + sAskQueue.insert(agent_id); + } + + 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()) + { + // ...name already exists in cache, fire callback now + fireSignal(agent_id, slot, it->second); + 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); + } +} + + +void LLAvatarNameCache::setUseDisplayNames(bool use) +{ + if (use != sUseDisplayNames) + { + sUseDisplayNames = use; + // flush our cache + sCache.clear(); + } +} + +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(LLSD headers) +{ + F64 expires = 0.0; + if (expirationFromCacheControl(headers, &expires)) + { + return expires; + } + else + { + // With no expiration info, default to a day + const F64 DEFAULT_EXPIRES = 24.0 * 60.0 * 60.0; + F64 now = LLFrameTimer::getTotalSeconds(); + return now + DEFAULT_EXPIRES; + } +} + +bool LLAvatarNameCache::expirationFromCacheControl(LLSD headers, F64 *expires) +{ + // Allow the header to override the default + LLSD cache_control_header = headers["cache-control"]; + if (cache_control_header.isDefined()) + { + S32 max_age = 0; + std::string cache_control = cache_control_header.asString(); + if (max_age_from_cache_control(cache_control, &max_age)) + { + F64 now = LLFrameTimer::getTotalSeconds(); + *expires = now + (F64)max_age; + return true; + } + } + return false; +} + +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; +} + + |