95 lines
3 KiB
JavaScript
95 lines
3 KiB
JavaScript
|
"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 {EngineRequest} req
|
||
|
|
*/
|
||
|
|
constructor(req) {
|
||
|
|
super(req);
|
||
|
|
this._doSend = (data) => {
|
||
|
|
this.socket.send(data, this._onSent);
|
||
|
|
};
|
||
|
|
this._doSendLast = (data) => {
|
||
|
|
this.socket.send(data, this._onSentLast);
|
||
|
|
};
|
||
|
|
this._onSent = (err) => {
|
||
|
|
if (err) {
|
||
|
|
this.onError("write error", err.stack);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
this._onSentLast = (err) => {
|
||
|
|
if (err) {
|
||
|
|
this.onError("write error", err.stack);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
this.emit("drain");
|
||
|
|
this.writable = true;
|
||
|
|
this.emit("ready");
|
||
|
|
}
|
||
|
|
};
|
||
|
|
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
|
||
|
|
*/
|
||
|
|
get name() {
|
||
|
|
return "websocket";
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Advertise upgrade support.
|
||
|
|
*/
|
||
|
|
get handlesUpgrades() {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
send(packets) {
|
||
|
|
this.writable = false;
|
||
|
|
for (let i = 0; i < packets.length; i++) {
|
||
|
|
const packet = packets[i];
|
||
|
|
const isLast = i + 1 === packets.length;
|
||
|
|
if (this._canSendPreEncodedFrame(packet)) {
|
||
|
|
// the WebSocket frame was computed with WebSocket.Sender.frame()
|
||
|
|
// see https://github.com/websockets/ws/issues/617#issuecomment-283002469
|
||
|
|
this.socket._sender.sendFrame(
|
||
|
|
// @ts-ignore
|
||
|
|
packet.options.wsPreEncodedFrame, isLast ? this._onSentLast : this._onSent);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
this.parser.encodePacket(packet, this.supportsBinary, isLast ? this._doSendLast : this._doSend);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Whether the encoding of the WebSocket frame can be skipped.
|
||
|
|
* @param packet
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
_canSendPreEncodedFrame(packet) {
|
||
|
|
var _a, _b, _c;
|
||
|
|
return (!this.perMessageDeflate &&
|
||
|
|
typeof ((_b = (_a = this.socket) === null || _a === void 0 ? void 0 : _a._sender) === null || _b === void 0 ? void 0 : _b.sendFrame) === "function" &&
|
||
|
|
// @ts-ignore
|
||
|
|
((_c = packet.options) === null || _c === void 0 ? void 0 : _c.wsPreEncodedFrame) !== undefined);
|
||
|
|
}
|
||
|
|
doClose(fn) {
|
||
|
|
debug("closing");
|
||
|
|
this.socket.close();
|
||
|
|
fn && fn();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
exports.WebSocket = WebSocket;
|