feat: upgrade socket.io to v4

Signed-off-by: MiaoWoo <admin@yumc.pw>

packages/websocket/src/socket.io-client/contrib/backo2.ts

@@ -0,0 +1,77 @@
+/**
+ * Initialize backoff timer with `opts`.
+ *
+ * - `min` initial timeout in milliseconds [100]
+ * - `max` max timeout [10000]
+ * - `jitter` [0]
+ * - `factor` [2]
+ *
+ * @param {Object} opts
+ * @api public
+ */
+
+export function Backoff(this: any, opts) {
+    opts = opts || {}
+    this.ms = opts.min || 100
+    this.max = opts.max || 10000
+    this.factor = opts.factor || 2
+    this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0
+    this.attempts = 0
+}
+
+/**
+ * Return the backoff duration.
+ *
+ * @return {Number}
+ * @api public
+ */
+
+Backoff.prototype.duration = function () {
+    var ms = this.ms * Math.pow(this.factor, this.attempts++)
+    if (this.jitter) {
+        var rand = Math.random()
+        var deviation = Math.floor(rand * this.jitter * ms)
+        ms = (Math.floor(rand * 10) & 1) == 0 ? ms - deviation : ms + deviation
+    }
+    return Math.min(ms, this.max) | 0
+}
+
+/**
+ * Reset the number of attempts.
+ *
+ * @api public
+ */
+
+Backoff.prototype.reset = function () {
+    this.attempts = 0
+}
+
+/**
+ * Set the minimum duration
+ *
+ * @api public
+ */
+
+Backoff.prototype.setMin = function (min) {
+    this.ms = min
+}
+
+/**
+ * Set the maximum duration
+ *
+ * @api public
+ */
+
+Backoff.prototype.setMax = function (max) {
+    this.max = max
+}
+
+/**
+ * Set the jitter
+ *
+ * @api public
+ */
+
+Backoff.prototype.setJitter = function (jitter) {
+    this.jitter = jitter
+}