Re-added Test Latency in a better implementation https://github.com/libredirect/libredirect/issues/605

src/assets/javascripts/utils.js

@@ -58,7 +58,48 @@ function getList() {
 		}
 		http.send(null)
 	})
+}
 
+function pingOnce(href) {
+	return new Promise(async resolve => {
+		let started
+		let http = new XMLHttpRequest()
+		http.timeout = 5000
+		http.ontimeout = () => resolve(5000)
+		http.onerror = () => resolve()
+		http.onreadystatechange = () => {
+			if (http.readyState == 2) {
+				if (http.status == 200) {
+					let ended = new Date().getTime()
+					http.abort()
+					resolve(ended - started)
+				} else {
+					resolve(5000 + http.status)
+				}
+			}
+		}
+		http.open("GET", `${href}?_=${new Date().getTime()}`, true)
+		started = new Date().getTime()
+		http.send(null)
+	})
+}
+
+function ping(href) {
+	return new Promise(async resolve => {
+		let average = 0
+		let time
+		for (let i = 0; i < 3; i++) {
+			time = await pingOnce(href)
+			if (i == 0) continue
+			if (time >= 5000) {
+				resolve(time)
+				return
+			}
+			average += time
+		}
+		average = parseInt(average / 3)
+		resolve(average)
+	})
 }
 
 export default {
@@ -68,5 +109,6 @@ export default {
 	getBlacklist,
 	camelCase,
 	getConfig,
-	getOptions
+	getOptions,
+	ping,
 }

src/pages/options/index.js

@@ -90,6 +90,11 @@ async function loadPage(path) {
 		for (const frontend in config.services[service].frontends) {
 			if (config.services[service].frontends[frontend].instanceList) {
 				processCustomInstances(frontend, document)
+				document.getElementById(`ping-${frontend}`).addEventListener("click", async () => {
+					document.getElementById(`ping-${frontend}`).getElementsByTagName('x')[0].innerHTML = "Pinging..."
+					await ping(frontend)
+					document.getElementById(`ping-${frontend}`).getElementsByTagName('x')[0].innerHTML = "Ping instances"
+				})
 			}
 		}
 
@@ -229,3 +234,43 @@ function createList(frontend, networks, document, redirects, blacklist) {
 const r = window.location.href.match(/#(.*)/)
 if (r) loadPage(r[1])
 else loadPage("general")
+
+async function ping(frontend) {
+	let instanceElements = document.getElementById(frontend)
+		.getElementsByClassName('clearnet')[0]
+		.getElementsByTagName('x')
+	for (const element of instanceElements) {
+		let span = element.getElementsByTagName('span')[0]
+		if (!span) span = document.createElement('span')
+		span.innerHTML = '<span style="color:lightblue">pinging...</span>'
+		element.appendChild(span)
+
+		const href = element.getElementsByTagName('a')[0].href
+		let time = await utils.ping(href)
+
+		let color
+		let text
+
+		if (time < 5000) {
+			text = `${time}ms`
+			if (time <= 1000) { color = "green" }
+			else if (time <= 2000) color = "orange"
+		}
+		else if (time >= 5000) {
+			color = "red"
+			if (time == 5000) {
+				text = "5000ms+"
+			}
+			if (time > 5000) {
+				text = `Error: ${time - 5000}`
+			}
+		}
+		else {
+			color = "red"
+			text = 'Server not found'
+		}
+
+		span.innerHTML = `<span style="color:${color};">${text}</span>`
+
+	}
+}

src/pages/options/widgets/services.pug

@@ -51,6 +51,13 @@ each val, service in services
 
                         div(class="checklist custom-checklist")  
 
+                        div(class="some-block")
+                            a(class="button button-inline" id=`ping-${frontend}`)
+                                svg(xmlns="http://www.w3.org/2000/svg" height="20px" viewBox="0 0 24 24" width="20px" fill="currentColor")
+                                    path(d="M10.45 15.5q.6.6 1.55.587.95-.012 1.4-.687L19 7l-8.4 5.6q-.675.45-.712 1.375-.038.925.562 1.525ZM12 4q1.475 0 2.838.412Q16.2 4.825 17.4 5.65l-1.9 1.2q-.825-.425-1.712-.637Q12.9 6 12 6 8.675 6 6.338 8.337 4 10.675 4 14q0 1.05.287 2.075Q4.575 17.1 5.1 18h13.8q.575-.95.838-1.975Q20 15 20 13.9q0-.9-.212-1.75-.213-.85-.638-1.65l1.2-1.9q.75 1.175 1.188 2.5.437 1.325.462 2.75.025 1.425-.325 2.725-.35 1.3-1.025 2.475-.275.45-.75.7-.475.25-1 .25H5.1q-.525 0-1-.25t-.75-.7q-.65-1.125-1-2.387Q2 15.4 2 14q0-2.075.788-3.888.787-1.812 2.15-3.175Q6.3 5.575 8.125 4.787 9.95 4 12 4Zm.175 7.825Z")
+                                | 
+                                x() Ping instances
+                            
                         each val, network in networks
                             div(class=network)
                                 div(class="checklist")