view mod_http_altconnect/mod_http_altconnect.lua @ 5296:0f5657db1cfc

mod_isolate_host: handle server-generated stanzas The hook for setting the no_host_isolation is only called for c2s sessions. This does not work for stanzas generated by the server, such as PEP notifications or presence probe answers. To handle that, we do per-stanza checks for the case that the origin is local.
author Jonas Schäfer <jonas@wielicki.name>
date Sat, 01 Apr 2023 12:03:08 +0200
parents 0a0bf87ccda6
children
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-- mod_http_altconnect
-- XEP-0156: Discovering Alternative XMPP Connection Methods

module:depends"http";

local mm = require "core.modulemanager";
local json = require"util.json";
local st = require"util.stanza";
local array = require"util.array";

local function get_supported()
	local uris = array();
	if mm.is_loaded(module.host, "bosh") or  mm.is_loaded("*", "bosh") then
		uris:push({ rel = "urn:xmpp:alt-connections:xbosh", href = module:http_url("bosh", "/http-bind") });
	end
	if mm.is_loaded(module.host, "websocket") or  mm.is_loaded("*", "websocket") then
		uris:push({ rel = "urn:xmpp:alt-connections:websocket", href = module:http_url("websocket", "xmpp-websocket"):gsub("^http", "ws") });
	end
	return uris;
end


local function GET_xml(event)
	local request, response = event.request, event.response;
	local xrd = st.stanza("XRD", { xmlns='http://docs.oasis-open.org/ns/xri/xrd-1.0' });
	local uris = get_supported();
	for i, method in ipairs(uris) do
		xrd:tag("Link", method):up();
	end
	response.headers.content_type = "application/xrd+xml"
	response.headers.access_control_allow_origin = "*";
	return '<?xml version="1.0" encoding="UTF-8"?>' .. tostring(xrd);
end

local function GET_json(event)
	local request, response = event.request, event.response;
	local jrd = { links = get_supported() };
	response.headers.content_type = "application/json"
	response.headers.access_control_allow_origin = "*";
	return json.encode(jrd);
end;

local function GET_either(event)
	local accept_type = event.request.headers.accept or "";
	if ( accept_type:find("xml") or #accept_type ) < ( accept_type:find("json") or #accept_type+1 ) then
		return GET_xml(event);
	else
		return GET_json(event);
	end
end;

module:provides("http", {
	default_path = "/.well-known";
	route = {
		["GET /host-meta"] = GET_either;
		-- ["GET /host-meta.xml"] = GET_xml; -- Hmmm
		["GET /host-meta.json"] = GET_json;
	};
});