WIP - add extractor, generate snippet_data

node_modules/gzip-size/index.js

@@ -0,0 +1,50 @@
+'use strict';
+var duplexer = require('duplexer');
+var stream = require('stream');
+var zlib = require('zlib');
+var opts = {level: 9};
+
+module.exports = function (str, cb) {
+	if (!str) {
+		cb(null, 0);
+		return;
+	}
+
+	zlib.gzip(str, opts, function (err, data) {
+		if (err) {
+			cb(err, 0);
+			return;
+		}
+
+		cb(err, data.length);
+	});
+};
+
+module.exports.sync = function (str) {
+	return zlib.gzipSync(str, opts).length;
+};
+
+module.exports.stream = function () {
+	var input = new stream.PassThrough();
+	var output = new stream.PassThrough();
+	var wrapper = duplexer(input, output);
+
+	var gzipSize = 0;
+	var gzip = zlib.createGzip(opts)
+		.on('data', function (buf) {
+			gzipSize += buf.length;
+		})
+		.on('error', function () {
+			wrapper.gzipSize = 0;
+		})
+		.on('end', function () {
+			wrapper.gzipSize = gzipSize;
+			wrapper.emit('gzip-size', gzipSize);
+			output.end();
+		});
+
+	input.pipe(gzip);
+	input.pipe(output, {end: false});
+
+	return wrapper;
+};