|
"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 { |
|
|
|
|
|
|
|
|
|
|
|
|
|
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; |
|
} |
|
|
|
|
|
|
|
|
|
|
|
get name() { |
|
return "websocket"; |
|
} |
|
|
|
|
|
|
|
|
|
|
|
get handlesUpgrades() { |
|
return true; |
|
} |
|
|
|
|
|
|
|
|
|
|
|
get supportsFraming() { |
|
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; |
|
|
|
const opts = {}; |
|
if (packet.options) { |
|
opts.compress = packet.options.compress; |
|
} |
|
const onSent = (err) => { |
|
if (err) { |
|
return this.onError("write error", err.stack); |
|
} |
|
else if (isLast) { |
|
this.writable = true; |
|
this.emit("drain"); |
|
} |
|
}; |
|
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.socket.send(data, opts, onSent); |
|
}; |
|
if (packet.options && typeof packet.options.wsPreEncoded === "string") { |
|
send(packet.options.wsPreEncoded); |
|
} |
|
else if (this._canSendPreEncodedFrame(packet)) { |
|
|
|
|
|
this.socket._sender.sendFrame(packet.options.wsPreEncodedFrame, onSent); |
|
} |
|
else { |
|
this.parser.encodePacket(packet, this.supportsBinary, send); |
|
} |
|
} |
|
} |
|
|
|
|
|
|
|
|
|
|
|
_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" && |
|
((_c = packet.options) === null || _c === void 0 ? void 0 : _c.wsPreEncodedFrame) !== undefined); |
|
} |
|
|
|
|
|
|
|
|
|
|
|
doClose(fn) { |
|
debug("closing"); |
|
this.socket.close(); |
|
fn && fn(); |
|
} |
|
} |
|
exports.WebSocket = WebSocket; |
|
|