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construct/modules/federation/event_auth.cc

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// 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)"
};
m::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 },
};
m::resource::response
get__event_auth(client &client,
const m::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(m::room::server_acl::enable_read && !m::room::server_acl::check(room_id, request.node_id))
throw m::ACCESS_DENIED
{
"You are not permitted by the room's server access control list."
};
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::room room
{
room_id, event_id
};
bool visible
{
m::visible(room, request.node_id)
};
// make an exception to the visibility for invitee cases.
if(!visible)
{
static const m::event::fetch::opts fopts
{
m::event::keys::include {"room_id", "sender", "type", "state_key", "content"}
};
const m::event::fetch event
{
event_id, fopts
};
visible = m::visible(event, request.node_id);
}
if(!visible)
throw m::ACCESS_DENIED
{
"You are not permitted to view the room at this event"
};
m::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::array auth_chain
{
top, "auth_chain"
};
const m::room::auth::chain chain
{
m::index(event_id)
};
m::event::fetch event;
chain.for_each([&auth_chain, &event]
(const m::event::idx &event_idx)
{
if(seek(std::nothrow, event, event_idx))
auth_chain.append(event);
return true;
});
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return std::move(response);
}
m::resource::method
method_get
{
event_auth_resource, "GET", get__event_auth,
{
method_get.VERIFY_ORIGIN
}
};