mirror of
https://github.com/matrix-construct/construct
synced 2024-09-27 11:18:51 +02:00
431 lines
7.6 KiB
C++
431 lines
7.6 KiB
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2020 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::bridge
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{
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static size_t make_txn(const config &, json::stack &, events::range &);
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static event::idx worker_handle(const config &, const net::hostport &, const events::range &, window_buffer);
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static void worker_loop(const config &, const rfc3986::uri &, const mutable_buffer &);
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static void worker(std::string event, std::string event_id);
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static void handle_event(const event &, vm::eval &);
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static void fini();
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static void init();
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extern conf::item<bool> enable;
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extern conf::item<seconds> timeout;
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extern ctx::dock worker_dock;
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extern std::vector<context> worker_context;
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extern hookfn<vm::eval &> notify_hook;
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}
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ircd::mapi::header
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IRCD_MODULE
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{
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"Bridges (Application Services)",
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ircd::m::bridge::init,
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ircd::m::bridge::fini,
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};
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decltype(ircd::m::bridge::enable)
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ircd::m::bridge::enable
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{
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{ "name", "ircd.m.bridge.enable" },
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{ "default", true },
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};
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decltype(ircd::m::bridge::timeout)
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ircd::m::bridge::timeout
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{
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{ "name", "ircd.m.bridge.txn.timeout" },
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{ "default", 10L },
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};
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decltype(ircd::m::bridge::worker_dock)
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ircd::m::bridge::worker_dock;
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decltype(ircd::m::bridge::worker_context)
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ircd::m::bridge::worker_context;
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decltype(ircd::m::bridge::notify_hook)
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ircd::m::bridge::notify_hook
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{
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handle_event,
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{
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{ "_site", "vm.notify" },
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}
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};
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void
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ircd::m::bridge::handle_event(const m::event &event,
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vm::eval &eval)
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try
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{
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if(eval.room_internal)
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return;
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if(!event.event_id)
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return;
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worker_dock.notify_all();
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}
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catch(const ctx::interrupted &)
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{
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throw;
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}
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catch(const std::exception &e)
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{
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log::critical
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{
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log, "Failed to handle %s notify :%s",
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string_view{event.event_id},
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e.what(),
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};
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}
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void
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ircd::m::bridge::init()
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{
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if(!enable)
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return;
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config::for_each([]
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(const event::idx &event_idx, const event &event, const config &config)
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{
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log::debug
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{
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log, "Found configuration for '%s' in %s by %s",
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json::get<"id"_>(config),
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json::get<"room_id"_>(event),
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string_view{event.event_id},
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};
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worker_context.emplace_back(context
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{
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"m.bridge",
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512_KiB,
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context::POST,
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std::bind(&bridge::worker, std::string(event.source), std::string(event.event_id)),
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});
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return true;
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});
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}
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void
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ircd::m::bridge::fini()
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{
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for(auto &worker : worker_context)
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worker.terminate();
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if(!worker_context.empty())
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log::debug
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{
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log, "Waiting for %zu bridge workers...",
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worker_context.size(),
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};
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for(auto &worker : worker_context)
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worker.join();
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}
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void
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ircd::m::bridge::worker(const std::string event_,
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const std::string event_id)
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try
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{
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const m::event event
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{
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json::object{event_}, event_id
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};
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const bridge::config config
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{
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json::get<"content"_>(event)
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};
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const rfc3986::uri uri
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{
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at<"url"_>(config)
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};
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const unique_mutable_buffer buf
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{
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event::MAX_SIZE * 8
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};
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log::notice
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{
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log, "Bridging to '%s' via %s by %s",
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json::get<"id"_>(config),
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uri.remote,
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event_id,
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};
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run::barrier<ctx::interrupted> {};
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const bool prelinking
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{
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server::prelink(uri.remote)
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};
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if(!prelinking)
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log::warning
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{
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log, "Bridging to '%s' via %s may not be possible :%s",
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json::get<"id"_>(config),
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uri.remote,
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server::errmsg(uri.remote),
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};
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worker_loop(config, uri, buf);
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}
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catch(const ctx::interrupted &)
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{
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throw;
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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, "Worker failed to initialize :%s",
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e.what(),
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};
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}
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void
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ircd::m::bridge::worker_loop(const config &config,
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const rfc3986::uri &uri,
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const mutable_buffer &buf)
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try
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{
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const net::hostport target
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{
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uri.remote
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};
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auto since {vm::sequence::retired}; do
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{
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worker_dock.wait([&since]
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{
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return since < vm::sequence::retired;
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});
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// Wait here if the bridge is down.
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while(unlikely(server::errant(target)))
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{
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log::error
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{
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log, "Waiting for '%s' at %s with error :%s",
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json::get<"id"_>(config),
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uri.remote,
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server::errmsg(target),
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};
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sleep(15s);
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continue;
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}
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const events::range range
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{
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since, vm::sequence::retired + 1
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};
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since = worker_handle(config, target, range, buf);
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assert(since >= range.first);
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assert(since <= range.second);
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// Prevent spin for retrying the same range on handled exception.
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if(unlikely(since == range.first))
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{
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sleep(15s);
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continue;
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}
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}
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while(run::level == run::level::RUN);
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}
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catch(const ctx::interrupted &)
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{
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throw;
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}
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catch(const std::exception &e)
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{
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log::critical
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{
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log, "Worker unhandled :%s",
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e.what(),
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};
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}
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ircd::m::event::idx
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ircd::m::bridge::worker_handle(const config &config,
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const net::hostport &target,
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const events::range &range_,
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window_buffer buf)
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try
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{
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size_t count {0};
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auto range {range_};
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buf([&config, &count, &range]
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(const mutable_buffer &buf)
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{
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json::stack out
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{
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buf
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};
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count += make_txn(config, out, range);
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return out.completed();
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});
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if(!count)
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return range.second;
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const json::object content
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{
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buf.completed()
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};
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buf = window_buffer
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{
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buf.remains()
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};
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// Generate URL for the PUT
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char uribuf[448], txnidbuf[64];
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const string_view url
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{
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make_uri(uribuf, config, fmt::sprintf
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{
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txnidbuf, "transactions/%lu", range.first,
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})
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};
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log::debug
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{
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log, "[%s] PUT txn:%lu:%lu (%lu:%lu) events:%zu",
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json::get<"id"_>(config),
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range.first,
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range.second,
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range_.first,
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range_.second,
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count,
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};
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// HTTP request sans
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http::request
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{
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buf,
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host(target),
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"PUT",
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url,
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size(string_view(content)),
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"application/json; charset=utf-8"_sv,
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};
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// Outputs from consumed buffer
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server::out out;
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out.head = buf.completed();
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out.content = content;
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// Inputs to remaining buffer
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server::in in;
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in.head = buf.remains();
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in.content = in.head;
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// Send to bridge
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server::request::opts sopts;
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server::request req
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{
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target, std::move(out), std::move(in), &sopts
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};
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// Recv response
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const auto code
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{
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req.get(seconds(timeout))
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};
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log::logf
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{
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log, log::level::DEBUG,
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"[%s] %u txn:%lu:%lu (%lu:%lu) events:%zu :%s",
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json::get<"id"_>(config),
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uint(code),
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range.first,
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range.second,
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range_.first,
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range_.second,
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count,
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http::status(code),
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};
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return range.second + 1;
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}
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catch(const ctx::interrupted &)
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{
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throw;
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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, "worker handle range:%lu:%lu :%s",
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range_.first,
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range_.second,
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e.what(),
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};
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return range_.first;
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}
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size_t
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ircd::m::bridge::make_txn(const config &config,
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json::stack &out,
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events::range &range)
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{
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json::stack::object top
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{
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out
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};
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json::stack::array events
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{
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top, "events"
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};
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size_t count {0};
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m::events::for_each(events::range{range}, [&]
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(const event::idx &event_idx, m::event event)
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{
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if(m::internal(json::get<"room_id"_>(event)))
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return true;
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m::event::append::opts opts;
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opts.event_idx = &event_idx;
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opts.query_txnid = false;
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opts.query_prev_state = true;
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opts.query_redacted = false;
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m::event::append
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{
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events, event
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};
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range.second = event_idx;
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++count;
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const bool sufficient_buffer
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{
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out.remaining() > event::MAX_SIZE + 16_KiB
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};
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return sufficient_buffer;
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});
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return count;
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}
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