1 files changed, 41 insertions, 0 deletions
diff --git a/utils/networkUsage.js b/utils/networkUsage.js
new file mode 100644
index 0000000..a7131f2
--- /dev/null
+++ b/utils/networkUsage.js
@@ -0,0 +1,41 @@
+function defaultInterface(route) {
+	var lines = route.split(/\r?\n/)
+	for (var i = 0; i < lines.length; i++) {
+		var l = lines[i]
+		if (l.indexOf("default via") === 0) return l.split(/\s+/)[4]
+	}
+	throw "No default interface"
+}
+function getRxTxBytes(dev, iface) {
+	var lines = dev.split(/\r?\n/)
+	for (var i = 0; i < lines.length; i++) {
+		var l = lines[i].trim()
+		if (!l.startsWith(iface + ":")) continue
+		var p = l.split(/\s+/)
+		return { rx: parseInt(p[1]), tx: parseInt(p[9]) }
+	}
+	throw "Interface not found"
+}
+function formatSize(size, unit) {
+	const labels = ["B", "K", "M", "G", "T"]
+	let power = 0, kilo = 2 ** 10
+	while (size > kilo && power < labels.length - 1) {
+		size /= kilo; power++
+	}
+	if (unit) {
+		return labels[power]
+	} else {
+		return size.toFixed(0)
+	}
+}
+
+// const iface = defaultInterface()
+// let prev = getRxTxBytes(iface)
+
+// setInterval(() => {
+// 	const cur = getRxTxBytes(iface)
+// 	const dr = (cur.rx - prev.rx) / (interval / 1000)
+// 	const dt = (cur.tx - prev.tx) / (interval / 1000)
+// 	prev = cur
+// 	console.log(formatSize(dr), formatSize(dt))
+// }, interval)