view mod_muc_media_metadata/mod_muc_media_metadata.lua @ 5553:67152838afbc

mod_http_oauth2: Improve error messages for URI properties Since there are separate validation checks for URI properties, including that they should use https, with better and more specific error reporting. Reverts 'luaPattern' to 'pattern' which is not currently supported by util.jsonschema, but allows anything that retrieves the schema over http to validate against it, should they wish to do so.
author Kim Alvefur <zash@zash.se>
date Sat, 17 Jun 2023 18:15:00 +0200
parents d4537f045a78
children
line wrap: on
line source

local async = require "util.async";
local promise = require "util.promise";
local http = require "net.http";
local st = require "util.stanza";

local xmlns_metadata = "xmpp:prosody.im/protocol/media-metadata#0"

local fetch_headers = {
	bytes = "content-length";
	type = "content-type";
	etag = "etag";
	blurhash = "blurhash";
};

local function fetch_media_metadata(url)
	return promise.new(function (resolve)
		http.request(url, { method = "HEAD" }, function (body, code, response) --luacheck: ignore 212/body
			if code == 200 then
				local metadata = {};
				for metadata_name, header_name in pairs(fetch_headers) do
					metadata[metadata_name] = response.headers[header_name];
				end
				resolve(metadata);
			else
				resolve(nil);
			end
		end);
	end);
end

local function metadata_to_tag(metadata)
	if not metadata then return; end

	local metadata_tag = st.stanza("metadata", { xmlns = xmlns_metadata });
	for k, v in pairs(metadata) do
		metadata_tag:text_tag(k, v)
	end

	return metadata_tag;
end

module:hook("muc-occupant-groupchat", function (event)
	local stanza = event.stanza;

	local promises;

	for oob in stanza:childtags("x", "jabber:x:oob") do
		if not promises then promises = {}; end
		local url = oob:get_child_text("url");
		local p = fetch_media_metadata(url)
			:next(metadata_to_tag)
			:next(function (metadata_tag)
				oob:add_child(metadata_tag);
			end);
		table.insert(promises, p);
	end

	if not promises then return; end

	async.wait(promise.all(promises));
end);