spus/web/favicon.node.js

var fs = require("fs");
var zlib = require("zlib");

var gzipped;

var favicon = fs.readFileSync("favicon.ico");

zlib.gzip(favicon, function(err, res) {
	gzipped = res;
});

module.exports = function(ctx) {
	if (favicon) {
		ctx.res.setHeader(
			"Cache-Control",
			"public, max-age="+ctx.conf.cache_max_age
		);
	}

	if (gzipped && ctx.shouldGzip) {
		ctx.res.setHeader("Content-Encoding", "gzip");
		ctx.res.end(gzipped);
	} else if (favicon) {
		ctx.res.end(favicon);
	} else {
		ctx.err404();
	}
}