601 lines
10 KiB
C++
601 lines
10 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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namespace ircd::m
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{
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extern conf::item<seconds> alias_fetch_timeout;
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extern conf::item<seconds> alias_cache_ttl;
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}
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decltype(ircd::m::alias_cache_ttl)
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ircd::m::alias_cache_ttl
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{
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{ "name", "ircd.m.room.aliases.cache.ttl" },
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{ "default", 604800L },
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};
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decltype(ircd::m::alias_fetch_timeout)
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ircd::m::alias_fetch_timeout
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{
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{ "name", "ircd.m.room.aliases.fetch.timeout" },
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{ "default", 10L },
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};
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//
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// m::room::aliases
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//
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size_t
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ircd::m::room::aliases::count()
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const
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{
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return count(string_view{});
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}
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size_t
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ircd::m::room::aliases::count(const string_view &server)
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const
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{
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size_t ret(0);
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for_each(server, [&ret]
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(const auto &a) noexcept
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{
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++ret;
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return true;
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});
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return ret;
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}
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bool
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ircd::m::room::aliases::has(const alias &alias)
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const
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{
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return !for_each(alias.host(), [&alias]
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(const id::room_alias &a) noexcept
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{
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assert(a.host() == alias.host());
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return a == alias? false : true; // false to break on found
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});
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}
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bool
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ircd::m::room::aliases::has_server(const string_view &server)
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const
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{
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return !for_each(server, []
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(const id::room_alias &a) noexcept
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{
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return false;
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});
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}
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bool
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ircd::m::room::aliases::for_each(const closure_bool &closure)
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const
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{
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const room::state state
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{
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room
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};
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return state.for_each("m.room.aliases", [this, &closure]
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(const string_view &type, const string_view &state_key, const event::idx &)
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{
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return for_each(state_key, closure);
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});
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}
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bool
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ircd::m::room::aliases::for_each(const string_view &server,
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const closure_bool &closure)
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const
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{
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if(!server)
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return for_each(closure);
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return for_each(room, server, closure);
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}
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bool
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ircd::m::room::aliases::for_each(const m::room &room,
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const string_view &server,
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const closure_bool &closure)
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{
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const room::state state
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{
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room
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};
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assert(server);
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const event::idx &event_idx
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{
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state.get(std::nothrow, "m.room.aliases", server)
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};
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if(!event_idx)
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return true;
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bool ret{true};
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m::get(std::nothrow, event_idx, "content", [&closure, &ret]
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(const json::object &content)
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{
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const json::array &aliases
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{
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content["aliases"]
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};
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for(auto it(begin(aliases)); it != end(aliases) && ret; ++it)
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{
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const json::string &alias(*it);
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if(!valid(m::id::ROOM_ALIAS, alias))
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continue;
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if(!closure(alias))
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ret = false;
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}
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});
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return ret;
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}
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//
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// m::room::aliases::cache
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//
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bool
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ircd::m::room::aliases::cache::del(const alias &alias)
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{
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char buf[m::id::room_alias::buf::SIZE];
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const string_view &key
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{
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make_key(buf, alias)
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};
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const m::room::id::buf alias_room_id
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{
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"alias", origin(my())
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};
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const m::room alias_room
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{
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alias_room_id
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};
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const auto &event_idx
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{
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alias_room.get(std::nothrow, "ircd.room.alias", key)
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};
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if(!event_idx)
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return false;
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const auto event_id
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{
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m::event_id(std::nothrow, event_idx)
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};
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if(!event_id)
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return false;
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const auto ret
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{
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redact(alias_room, me(), event_id, "deleted")
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};
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return true;
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}
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bool
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ircd::m::room::aliases::cache::set(const alias &alias,
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const id &id)
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{
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char buf[m::id::room_alias::buf::SIZE];
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const string_view &key
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{
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make_key(buf, alias)
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};
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const m::room::id::buf alias_room_id
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{
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"alias", origin(my())
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};
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const m::room alias_room
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{
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alias_room_id
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};
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const auto ret
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{
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send(alias_room, me(), "ircd.room.alias", key,
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{
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{ "room_id", id }
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})
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};
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return true;
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}
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bool
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ircd::m::room::aliases::cache::get(std::nothrow_t,
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const alias &alias,
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const id::closure &closure)
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{
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m::event::idx event_idx
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{
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getidx(alias)
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};
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const bool expired
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{
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!my_host(alias.host()) && (!event_idx || cache::expired(event_idx))
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};
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if(!event_idx || expired)
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{
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if(my_host(alias.host()))
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return false;
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if(expired)
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log::dwarning
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{
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log, "Cached alias %s expired age:%ld ttl:%ld",
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string_view{alias},
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cache::age(event_idx).count(),
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milliseconds(seconds(alias_cache_ttl)).count(),
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};
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if(!fetch(std::nothrow, alias, alias.host()))
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return false;
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if(!(event_idx = getidx(alias)))
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return false;
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}
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bool ret{false};
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m::get(std::nothrow, event_idx, "content", [&closure, &ret]
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(const json::object &content)
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{
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const json::string &room_id
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{
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content.get("room_id")
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};
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if(!empty(room_id))
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{
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ret = true;
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closure(room_id);
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}
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});
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return ret;
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}
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bool
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ircd::m::room::aliases::cache::fetch(std::nothrow_t,
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const alias &a,
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const string_view &remote)
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try
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{
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fetch(a, remote);
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return true;
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}
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catch(const std::exception &e)
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{
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log::error
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{
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log, "Failed to fetch room_id for %s from %s :%s",
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string_view{a},
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remote,
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e.what(),
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};
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return false;
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}
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ircd::m::room::id::buf
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ircd::m::room::aliases::cache::get(const alias &a)
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{
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id::buf ret;
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get(a, [&ret]
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(const id &room_id)
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{
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ret = room_id;
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});
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return ret;
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}
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ircd::m::room::id::buf
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ircd::m::room::aliases::cache::get(std::nothrow_t,
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const alias &a)
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{
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id::buf ret;
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get(std::nothrow, a, [&ret]
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(const id &room_id)
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{
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ret = room_id;
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});
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return ret;
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}
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void
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ircd::m::room::aliases::cache::get(const alias &a,
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const id::closure &c)
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{
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if(!get(std::nothrow, a, c))
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throw m::NOT_FOUND
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{
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"Cannot find room_id for %s",
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string_view{a}
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};
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}
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bool
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ircd::m::room::aliases::cache::for_each(const closure_bool &c)
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{
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return for_each(string_view{}, c);
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}
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void
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ircd::m::room::aliases::cache::fetch(const alias &alias,
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const string_view &remote)
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try
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{
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const unique_buffer<mutable_buffer> buf
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{
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16_KiB
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};
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m::fed::query::opts opts;
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opts.remote = remote;
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opts.dynamic = false;
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m::fed::query::directory request
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{
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alias, buf, std::move(opts)
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};
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const http::code &code
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{
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request.get(seconds(alias_fetch_timeout))
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};
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const json::object response
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{
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request
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};
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const json::string &room_id
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{
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response["room_id"]
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};
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if(!valid(m::id::ROOM, room_id))
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throw m::NOT_FOUND
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{
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"Server '%s' does not know room_id for %s",
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remote,
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string_view{alias},
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};
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set(alias, m::id::room(room_id));
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}
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catch(const ctx::timeout &e)
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{
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throw m::error
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{
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http::GATEWAY_TIMEOUT, "M_ROOM_ALIAS_TIMEOUT",
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"Server '%s' did not respond with a room_id for %s in time",
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remote,
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string_view{alias},
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};
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}
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catch(const server::unavailable &e)
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{
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throw m::error
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{
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http::BAD_GATEWAY, "M_ROOM_ALIAS_UNAVAILABLE",
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"Server '%s' is not available to query a room_id for %s",
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remote,
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string_view{alias},
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};
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}
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bool
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ircd::m::room::aliases::cache::for_each(const string_view &server,
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const closure_bool &closure)
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{
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const m::room::id::buf alias_room_id
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{
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"alias", origin(my())
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};
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const m::room::state state
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{
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alias_room_id
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};
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bool ret{true};
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const m::room::state::closure_bool reclosure{[&server, &closure, &ret]
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(const string_view &type, const string_view &state_key, const m::event::idx &event_idx)
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{
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thread_local char swapbuf[m::id::room_alias::buf::SIZE];
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const alias &alias
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{
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m::id::unswap(state_key, swapbuf)
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};
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if(server && alias.host() != server)
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return false;
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if(expired(event_idx))
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return true;
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m::get(std::nothrow, event_idx, "content", [&closure, &ret, &alias]
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(const json::object &content)
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{
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const json::string &room_id
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{
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content.get("room_id")
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};
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if(!empty(room_id))
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ret = closure(alias, room_id);
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});
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return ret;
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}};
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state.for_each("ircd.room.alias", server, reclosure);
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return ret;
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}
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bool
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ircd::m::room::aliases::cache::has(const alias &alias)
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{
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const auto &event_idx
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{
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getidx(alias)
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};
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if(!event_idx)
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return false;
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if(expired(event_idx))
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return false;
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bool ret{false};
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m::get(std::nothrow, event_idx, "content", [&ret]
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(const json::object &content)
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{
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const json::string &room_id
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{
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content.get("room_id")
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};
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ret = !empty(room_id);
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});
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return ret;
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}
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ircd::system_point
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ircd::m::room::aliases::cache::expires(const alias &alias)
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{
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const auto event_idx
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{
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getidx(alias)
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};
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if(!event_idx)
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return system_point::min();
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const milliseconds age
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{
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cache::age(event_idx)
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};
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const seconds ttl
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{
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alias_cache_ttl
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};
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return now<system_point>() + (ttl - age);
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}
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bool
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ircd::m::room::aliases::cache::expired(const event::idx &event_idx)
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{
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const milliseconds age
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{
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cache::age(event_idx)
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};
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const seconds ttl
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{
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alias_cache_ttl
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};
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return age > ttl;
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}
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ircd::milliseconds
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ircd::m::room::aliases::cache::age(const event::idx &event_idx)
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{
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time_t ts;
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if(!m::get(event_idx, "origin_server_ts", ts))
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return milliseconds::max();
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const time_t now
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{
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ircd::time<milliseconds>()
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};
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return milliseconds
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{
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now - ts
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};
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}
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ircd::m::event::idx
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ircd::m::room::aliases::cache::getidx(const alias &alias)
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{
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thread_local char swapbuf alignas(16) [m::id::room_alias::buf::SIZE];
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const string_view &swapped
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{
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alias.swap(swapbuf)
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};
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char buf[m::id::room_alias::buf::SIZE];
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const string_view &key
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{
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tolower(buf, swapped)
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};
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const m::room::id::buf alias_room_id
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{
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"alias", origin(my())
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};
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const m::room alias_room
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{
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alias_room_id
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};
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const auto &event_idx
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{
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alias_room.get(std::nothrow, "ircd.room.alias", key)
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};
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return event_idx;
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}
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ircd::string_view
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ircd::m::room::aliases::cache::make_key(const mutable_buffer &out,
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const alias &alias)
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{
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thread_local char swapbuf alignas(16) [m::id::room_alias::buf::SIZE];
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const string_view &swapped
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{
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alias.swap(swapbuf)
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};
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const string_view &key
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{
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tolower(out, swapped)
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};
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return key;
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}
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