first commit

2024-03-11 18:35:09 -04:00
commit 481c17499d
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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.WebSocket = void 0;
+const transport_1 = require("../transport");
+const debug_1 = require("debug");
+const debug = (0, debug_1.default)("engine:ws");
+class WebSocket extends transport_1.Transport {
+    /**
+     * WebSocket transport
+     *
+     * @param {http.IncomingMessage}
+     * @api public
+     */
+    constructor(req) {
+        super(req);
+        this.socket = req.websocket;
+        this.socket.on("message", (data, isBinary) => {
+            const message = isBinary ? data : data.toString();
+            debug('received "%s"', message);
+            super.onData(message);
+        });
+        this.socket.once("close", this.onClose.bind(this));
+        this.socket.on("error", this.onError.bind(this));
+        this.writable = true;
+        this.perMessageDeflate = null;
+    }
+    /**
+     * Transport name
+     *
+     * @api public
+     */
+    get name() {
+        return "websocket";
+    }
+    /**
+     * Advertise upgrade support.
+     *
+     * @api public
+     */
+    get handlesUpgrades() {
+        return true;
+    }
+    /**
+     * Advertise framing support.
+     *
+     * @api public
+     */
+    get supportsFraming() {
+        return true;
+    }
+    /**
+     * Writes a packet payload.
+     *
+     * @param {Array} packets
+     * @api private
+     */
+    send(packets) {
+        const packet = packets.shift();
+        if (typeof packet === "undefined") {
+            this.writable = true;
+            this.emit("drain");
+            return;
+        }
+        // always creates a new object since ws modifies it
+        const opts = {};
+        if (packet.options) {
+            opts.compress = packet.options.compress;
+        }
+        const send = data => {
+            if (this.perMessageDeflate) {
+                const len = "string" === typeof data ? Buffer.byteLength(data) : data.length;
+                if (len < this.perMessageDeflate.threshold) {
+                    opts.compress = false;
+                }
+            }
+            debug('writing "%s"', data);
+            this.writable = false;
+            this.socket.send(data, opts, err => {
+                if (err)
+                    return this.onError("write error", err.stack);
+                this.send(packets);
+            });
+        };
+        if (packet.options && typeof packet.options.wsPreEncoded === "string") {
+            send(packet.options.wsPreEncoded);
+        }
+        else {
+            this.parser.encodePacket(packet, this.supportsBinary, send);
+        }
+    }
+    /**
+     * Closes the transport.
+     *
+     * @api private
+     */
+    doClose(fn) {
+        debug("closing");
+        this.socket.close();
+        fn && fn();
+    }
+}
+exports.WebSocket = WebSocket;