Pluggable dev servers

[bennypowers]

Over at RHDS we're using spandx to allow us to develop with our local sources against redhat.com 'in production'.

We do this by proxying certain requests to a local dev server (web-dev-server)

If spandx' browsersync integration was pluggable, could be make do with a single dev server instance, and thus a single command, without need for terminal multiplexers?

relevant code:

spandx/app/spandx.js

Lines 197 to 229 in 34c5a64

	proxy: {
	target: internalProxyOrigin,
	proxyReq: [
	function (proxyReq, req, res) {
	// find and set a header to keep track of the spandx origin
	const url = new URL("http://localhost/");
	url.hostname = req.headers.host.split(":")[0];
	url.port = conf.port;
	url.protocol = conf.bs.https ? "https:" : "http:";
	const origin = url.origin;
	// set a header for spandx origin and env on both the request and response
	const env = _.findKey(
	conf.host,
	(host) => host === url.hostname
	);
	[res, proxyReq].forEach((r) => {
	r.setHeader("X-Spandx-Env", env || "default");
	r.setHeader("X-Spandx-Origin", origin);
	});
	if (typeof env === "undefined") {
	if (!config.silent) {
	console.warn(
	`WARN request received at ${origin} which is not in the spandx config`
	);
	}
	}
	},
	],
	},
	rewriteRules: _.concat(conf.rewriteRules, conf.bs.rewriteRules),

Y THO

some practical issues that came up:

• bs uses connect middleware, which is old and boring (that's both a pro and a con i suppose) whereas wds uses koa middleware (async-friendly)
• running two dev servers in parallel is awkward, I'd rather not have to bust out the terminal multiplexer to run this
• there's some duplication between the routing table and import maps that maybe using wds-only could solve

[mwcz]

Sorry I didn't see this sooner. spandx is in full maintenance mode and I don't anticipate adding any new features myself. That said, if you want to give it a go, I'd be happy to review and merge this feature.

I typically prefer the terminal multiplexer approach, because it makes interpreting log output so much easier.