File

mod_conversejs/mod_conversejs.lua @ 3492:f59334da6df9

mod_conversejs: Show fallback text if converse.js fails to load (thanks MattJ) This can happen if javascript is enabled but 3rd party resources are blocked, or some other error happened.
author Kim Alvefur <zash@zash.se>
date Tue, 19 Mar 2019 19:43:13 +0100
parent 3363:2681f74750b2
child 3494:4feab7e87675
line wrap: on
line source

-- mod_conversejs
-- Copyright (C) 2017 Kim Alvefur

local json_encode = require"util.json".encode;

module:depends"http";

local has_bosh = pcall(function ()
	module:depends"bosh";
end);

local has_ws = pcall(function ()
	module:depends("websocket");
end);

local cdn_url = module:get_option_string("conversejs_cdn", "https://cdn.conversejs.org");

local version = module:get_option_string("conversejs_version", "");
if version ~= "" then version = "/" .. version end
local js_url = module:get_option_string("conversejs_script", cdn_url..version.."/dist/converse.min.js");
local css_url = module:get_option_string("conversejs_css", cdn_url..version.."/css/converse.min.css");

local html_template = ([[
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" media="screen" href="$css_url"/>
<script charset="utf-8" src="$js_url"></script>
<title>Prosody IM and Converse.js</title>
</head>
<body>
<noscript>
<h1>Converse.js</h1>
<p>I&apos;m sorry, but this XMPP client application won&apos;t work without JavaScript.</p>
<p>Perhaps you would like to try one of these clients:</p>
<dl>
<dt>Desktop</dt>
<dd><ul>
<li><a href="https://gajim.org/">Gajim</a></li>
<li><a href="https://poez.io/">Poezio</a></li>
<li><a href="https://swift.im/">Swift</a></li>
</ul></dd>
<dt>Mobile</dt>
<dd><ul>
<li><a href="https://github.com/siacs/Conversations">Conversations</a></li>
<li><a href="https://yaxim.org/">Yaxim</a></li>
</ul></dd>
</dl>
<p><a href="https://xmpp.org/software/clients.html">More clients...</a></p>
</noscript>
<script>%s</script>
</body>
</html>
]]):gsub("$([%w_]+)", { js_url = js_url, css_url = css_url });

js_template = [[
if(typeof converse == 'undefined') {
	var div = document.createElement("div");
	var noscript = document.getElementsByTagName("noscript")[0];
	div.innerHTML = noscript.innerText;
	document.body.appendChild(div);
} else {
	converse.initialize(%s);
}
]];

local user_options = module:get_option("conversejs_options");

local function get_converse_options()
	local allow_registration = module:get_option_boolean("allow_registration", false);
	local converse_options = {
		bosh_service_url = has_bosh and module:http_url("bosh","/http-bind") or nil;
		websocket_url = has_ws and module:http_url("websocket","xmpp-websocket"):gsub("^http", "ws") or nil;
		authentication = module:get_option_string("authentication") == "anonymous" and "anonymous" or "login";
		jid = module.host;
		default_domain = module.host;
		domain_placeholder = module.host;
		allow_registration = allow_registration;
		registration_domain = allow_registration and module.host or nil;
	};

	if type(user_options) == "table" then
		for k,v in pairs(user_options) do
			converse_options[k] = v;
		end
	end

	return converse_options;
end

local add_tags = module:get_option_set("conversejs_tags");

if add_tags then
	local tags = {};
	for tag in add_tags do
		table.insert(tags, tag);
	end
	html_template = html_template:gsub("</head>", table.concat(tags, "\n"):gsub("%%", "%%").."\n</head>");
end

module:provides("http", {
	title = "Converse.js";
	route = {
		GET = function (event)
			local converse_options = get_converse_options();

			event.response.headers.content_type = "text/html";
			return html_template:format(js_template:format(json_encode(converse_options)));
		end;

		["GET /prosody-converse.js"] = function (event)
			local converse_options = get_converse_options();

			event.response.headers.content_type = "application/javascript";
			return js_template:format(json_encode(converse_options));
		end;
	}
});