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construct/modules/federation/event_auth.cc

133 lines
2.6 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
using namespace ircd;
mapi::header
IRCD_MODULE
{
"federation event_auth (undocumented)"
};
resource
event_auth_resource
{
"/_matrix/federation/v1/event_auth/",
{
"federation event_auth",
resource::DIRECTORY,
}
};
conf::item<size_t>
event_auth_flush_hiwat
{
{ "name", "ircd.federation.event_auth.flush.hiwat" },
{ "default", 16384L },
};
resource::response
get__event_auth(client &client,
const resource::request &request)
{
if(request.parv.size() < 1)
throw m::NEED_MORE_PARAMS
{
"room_id path parameter required"
};
m::room::id::buf room_id
{
url::decode(room_id, request.parv[0])
};
if(request.parv.size() < 2)
throw m::NEED_MORE_PARAMS
{
"event_id path parameter required"
};
m::event::id::buf event_id
{
url::decode(event_id, request.parv[1])
};
const m::event::fetch event
{
event_id
};
const m::room room
{
room_id, event_id
};
if(!room.visible(request.node_id))
throw m::ACCESS_DENIED
{
"You are not permitted to view the room at this event"
};
const m::room::state state
{
room
};
resource::response::chunked response
{
client, http::OK
};
json::stack out
{
response.buf, response.flusher(), size_t(event_auth_flush_hiwat)
};
json::stack::object top{out};
json::stack::member auth_chain_m
{
top, "auth_chain"
};
json::stack::array auth_chain
{
auth_chain_m
};
const auto append{[&auth_chain]
(const m::event &event)
{
if(json::get<"event_id"_>(event))
auth_chain.append(event);
}};
const auto append_with_sender{[&append, &state, &event]
(const m::event &event_)
{
append(event_);
if(json::get<"sender"_>(event_) != json::get<"sender"_>(event))
state.get(std::nothrow, "m.room.member", json::get<"sender"_>(event_), append);
}};
state.get(std::nothrow, "m.room.create", "", append);
state.get(std::nothrow, "m.room.join_rules", "", append);
state.get(std::nothrow, "m.room.power_levels", "", append_with_sender);
state.get(std::nothrow, "m.room.member", json::get<"sender"_>(event), append);
return {};
}
resource::method
method_get
{
event_auth_resource, "GET", get__event_auth,
{
method_get.VERIFY_ORIGIN
}
};