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modules/s_fetch: Add dispatch and wait logic to fetch hook handler.

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This commit is contained in:
Jason Volk 2019-04-22 12:28:45 -07:00
parent e3b1be2910
commit 7d3ccb975a
2 changed files with 117 additions and 19 deletions
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134
modules/s_fetch.cc
View file

@ -365,21 +365,23 @@ ircd::m::fetch::hook_handler(const event &event,
at<"room_id"_>(event)
};
if(opts.state_check_exists && !m::exists(room_id))
if(opts.fetch_state_check && !m::exists(room_id))
{
// Don't pass event_id in ctor here or m::NOT_FOUND.
m::room room{room_id};
room.event_id = event_id;
if(opts.state_must_exist && !opts.state_wait && !opts.state_fetch)
if(!opts.fetch_state_wait && !opts.fetch_state)
throw vm::error
{
vm::fault::STATE, "Missing state for room %s",
string_view{room_id}
};
if(opts.auth_chain_fetch)
fetch::auth_chain(room, room_id.host()); //TODO: XXX
if(opts.fetch_auth && bool(m::fetch::enable))
{
// Auth chain is acquired, validated, and saved by this call or throws.
auth_chain(room, eval.opts->node_id?: event_id.host());
}
}
const event::prev prev
@ -387,12 +389,55 @@ ircd::m::fetch::hook_handler(const event &event,
*eval.event_
};
const size_t auth_count
{
size(json::get<"auth_events"_>(prev))
};
size_t auth_exists(0), auth_fetching(0);
for(size_t i(0); i < auth_count; ++i)
{
const auto &auth_id
{
prev.auth_event(i)
};
if(!opts.fetch_auth_check)
continue;
if(m::exists(auth_id))
{
++auth_exists;
continue;
}
const bool can_fetch
{
opts.fetch_auth && bool(m::fetch::enable)
};
const bool fetching
{
can_fetch && start(room_id, auth_id)
};
auth_fetching += fetching;
if(!fetching || !opts.fetch_auth_wait)
throw vm::error
{
vm::fault::EVENT, "Missing auth %s for %s in %s",
string_view{auth_id},
json::get<"event_id"_>(*eval.event_),
json::get<"room_id"_>(*eval.event_)
};
}
const size_t prev_count
{
size(json::get<"prev_events"_>(prev))
};
size_t prev_exists(0);
size_t prev_exists(0), prev_fetching(0);
for(size_t i(0); i < prev_count; ++i)
{
const auto &prev_id
@ -400,7 +445,7 @@ ircd::m::fetch::hook_handler(const event &event,
prev.prev_event(i)
};
if(!opts.prev_check_exists)
if(!opts.fetch_prev_check)
continue;
if(m::exists(prev_id))
@ -411,27 +456,78 @@ ircd::m::fetch::hook_handler(const event &event,
const bool can_fetch
{
opts.prev_fetch && bool(m::fetch::enable)
opts.fetch_prev && bool(m::fetch::enable)
};
if((!can_fetch || !opts.prev_wait) && opts.prev_must_all_exist)
const bool fetching
{
can_fetch && start(room_id, prev_id)
};
prev_fetching += fetching;
if(!fetching && !opts.fetch_prev_wait)
throw vm::error
{
vm::fault::EVENT, "Missing prev %s in %s in %s",
vm::fault::EVENT, "Missing prev %s for %s in %s",
string_view{prev_id},
json::get<"event_id"_>(*eval.event_),
json::get<"room_id"_>(*eval.event_)
};
if(can_fetch)
start(room_id, prev_id);
if(can_fetch && opts.prev_wait)
dock.wait([&prev_id]
{
return !requests.count(prev_id);
});
}
if(auth_fetching && opts.fetch_auth_wait) for(size_t i(0); i < auth_count; ++i)
{
const auto &auth_id
{
prev.auth_event(i)
};
dock.wait([&auth_id]
{
return !requests.count(auth_id);
});
if(!m::exists(auth_id))
throw vm::error
{
vm::fault::EVENT, "Failed to fetch auth %s for %s in %s",
string_view{auth_id},
json::get<"event_id"_>(*eval.event_),
json::get<"room_id"_>(*eval.event_)
};
}
size_t prev_fetched(0);
if(prev_fetching && opts.fetch_prev_wait) for(size_t i(0); i < prev_count; ++i)
{
const auto &prev_id
{
prev.prev_event(i)
};
dock.wait([&prev_id]
{
return !requests.count(prev_id);
});
prev_fetched += m::exists(prev_id);
}
if(opts.fetch_prev && opts.fetch_prev_wait && prev_fetching && !prev_fetched)
throw vm::error
{
vm::fault::EVENT, "Failed to fetch any prev_events for %s in %s",
json::get<"event_id"_>(*eval.event_),
json::get<"room_id"_>(*eval.event_)
};
if(opts.fetch_prev && opts.fetch_prev_wait && opts.fetch_prev_all && prev_fetched < prev_fetching)
throw vm::error
{
vm::fault::EVENT, "Failed to fetch all required prev_events for %s in %s",
json::get<"event_id"_>(*eval.event_),
json::get<"room_id"_>(*eval.event_)
};
}
//

2
modules/s_fetch.h
View file

@ -44,7 +44,9 @@ namespace ircd::m::fetch
static void request_handle();
static size_t request_cleanup();
static void request_worker();
static void hook_handler(const event &, vm::eval &);
static void init();
static void fini();
}