view mod_http_muc_kick/mod_http_muc_kick.lua @ 5256:44f7edd4f845

mod_http_oauth2: Reject non-local hosts in more code paths We're not issuing tokens for users on remote hosts, we can't even authenticate them since they're remote. Thus the host is always the local module.host so no need to pass around the host in most cases or use it for anything but enforcing the same host.
author Kim Alvefur <zash@zash.se>
date Thu, 16 Mar 2023 17:52:10 +0100
parents e524a97730eb
children
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local jid_split = require "util.jid".prepped_split;
local json = require "util.json";

module:depends("http");

local authorization = assert(
    module:get_option_string("http_muc_kick_authorization_header", nil),
    "http_muc_kick_authorization_header setting is missing, please add it to the Prosody config before using mod_http_muc_kick"
);

local function is_authorized(request)
    return request.headers.authorization == authorization;
end

local function check_muc(jid)
	local muc_node, host = jid_split(jid);

	if not hosts[host] then
		return nil, nil, "No such host: "..host;
	elseif not hosts[host].modules.muc then
		return nil, nil, "Host '"..host.."' is not a MUC service";
	end

	return muc_node, host;
end

local function get_muc(muc_jid)
    local muc_node, host, err = check_muc(muc_jid);
    if not muc_node then
        return nil, host, err;
    end

    local muc = prosody.hosts[host].modules.muc.get_room_from_jid(muc_jid);
    if not muc then
        return nil, host, "No MUC '"..muc_node.."' found for host: "..host;
    end
    
    return muc;
end

local function handle_error(response, status_code, error)
    response.headers.content_type = "application/json";
    response.status_code = status_code;
    response:send(json.encode({error = error}));

    -- return true to keep the connection open, and prevent other handlers from executing.
    -- https://prosody.im/doc/developers/http#return_value
    return true;
end

module:provides("http", {
    route = {
        ["POST"] = function (event)
            local request, response = event.request, event.response;

            if not is_authorized(request) then
                return handle_error(response, 401, "Authorization failed");
            end

            local body = json.decode(request.body or "") or {};
            if not body then
                return handle_error(response, 400, "JSON body not found");
            end

            local nickname, muc_jid, reason = body.nickname, body.muc, body.reason or "";
            if not nickname or not muc_jid then
                return handle_error(response, 400, "Missing nickname and/or MUC");
            end

        	local muc, _, err = get_muc(muc_jid);
            if not muc then
                return handle_error(response, 404, "MUC not found: " .. err);
            end

            local occupant_jid = muc.jid .. "/" .. nickname;

            -- Kick user by giving them the "none" role
            -- https://xmpp.org/extensions/xep-0045.html#kick
            local success, error, condition = muc:set_role(true, occupant_jid, nil, reason);
            if not success then
                return handle_error(response, 400, "Couldn't kick user: ".. error .. ": " .. condition);
            end
            
            -- Kick was successful
        	return 200;
        end;
    };
});