tradingview-scraper
Version:
A gateway to TradingView's data for your Node.js application!
277 lines • 13.1 kB
JavaScript
"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
if (typeof b !== "function" && b !== null)
throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
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case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
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if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
if (ar || !(i in from)) {
if (!ar) ar = Array.prototype.slice.call(from, 0, i);
ar[i] = from[i];
}
}
return to.concat(ar || Array.prototype.slice.call(from));
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.TradingViewWebSocket = void 0;
var events_1 = require("events");
var randomstring_1 = __importDefault(require("randomstring"));
var ws_1 = __importDefault(require("ws"));
var QuoteFields_1 = require("./consts/QuoteFields");
var SIO = __importStar(require("./utils/SIOProtocol"));
var TradingViewWebSocket = /** @class */ (function (_super) {
__extends(TradingViewWebSocket, _super);
function TradingViewWebSocket() {
var _this = _super !== null && _super.apply(this, arguments) || this;
_this.ws = null;
_this.quoteSession = null;
_this.subscriptions = new Set();
return _this;
}
TradingViewWebSocket.generateSession = function () {
return 'qs_' + randomstring_1.default.generate({ length: 12, charset: 'alphabetic' });
};
TradingViewWebSocket.prototype.connect = function () {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
this.quoteSession = null;
this.ws = new ws_1.default('wss://data.tradingview.com/socket.io/websocket', {
origin: 'https://data.tradingview.com'
});
this.ws.on('message', function (message) { return _this.wsOnMessage(message.toString()); });
return [4 /*yield*/, this.tvSessionReady()];
case 1:
_a.sent();
return [2 /*return*/];
}
});
});
};
TradingViewWebSocket.prototype.disconnect = function () {
if (!this.ws) {
return;
}
this.ws.close();
this.ws = null;
this.quoteSession = null;
this.subscriptions = new Set();
};
TradingViewWebSocket.prototype.registerSymbol = function (symbol) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
if (this.subscriptions.has(symbol)) {
return [2 /*return*/];
}
this.subscriptions.add(symbol);
this.addQuoteSymbol(symbol);
return [2 /*return*/];
});
});
};
TradingViewWebSocket.prototype.unregisterSymbol = function (symbol) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
if (!this.subscriptions.delete(symbol)) {
return [2 /*return*/];
}
this.removeQuoteSymbol(symbol);
return [2 /*return*/];
});
});
};
TradingViewWebSocket.prototype.onPacket = function (packet) {
if (packet.isKeepAlive) {
// Handle protocol keepalive packets
this.wsSendRaw('~h~' + packet.data);
return;
}
var data = packet.data;
// Handle session packet
if (data.session_id) {
this.setAuthToken(TradingViewWebSocket.UNAUTHORIZED_USER_TOKEN);
this.createQuoteSession();
this.setQuoteFields(QuoteFields_1.allQuoteFields);
return;
}
if (data.m &&
data.m === 'qsd' &&
typeof data.p === 'object' &&
data.p.length > 1 &&
data.p[0] === this.quoteSession) {
var tickerData = data.p[1];
this.emit('data', tickerData.n, tickerData.s, tickerData.v);
}
};
TradingViewWebSocket.prototype.setAuthToken = function (token) {
this.wsSend('set_auth_token', [token]);
};
TradingViewWebSocket.prototype.createQuoteSession = function () {
this.quoteSession = TradingViewWebSocket.generateSession();
this.wsSend('quote_create_session', [this.quoteSession]);
};
TradingViewWebSocket.prototype.setQuoteFields = function (fields) {
this.wsSend('quote_set_fields', __spreadArray([this.quoteSession], fields, true));
};
TradingViewWebSocket.prototype.addQuoteSymbol = function (symbol) {
var _a;
(_a = this.ws) === null || _a === void 0 ? void 0 : _a.send(SIO.createMessage('quote_add_symbols', [this.quoteSession, symbol]));
};
TradingViewWebSocket.prototype.removeQuoteSymbol = function (symbol) {
var _a;
(_a = this.ws) === null || _a === void 0 ? void 0 : _a.send(SIO.createMessage('quote_remove_symbols', [this.quoteSession, symbol]));
};
TradingViewWebSocket.prototype.wsOnMessage = function (data) {
var _this = this;
var packets = SIO.parseMessages(data);
packets.forEach(function (packet) { return _this.onPacket(packet); });
};
TradingViewWebSocket.prototype.wsSendRaw = function (message) {
var _a;
(_a = this.ws) === null || _a === void 0 ? void 0 : _a.send(SIO.prependHeader(message));
};
TradingViewWebSocket.prototype.wsSend = function (func, args) {
var _a;
(_a = this.ws) === null || _a === void 0 ? void 0 : _a.send(SIO.createMessage(func, args));
};
TradingViewWebSocket.prototype.wsReady = function (timeout) {
var _a;
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_b) {
if (!timeout) {
timeout = TradingViewWebSocket.DEFAULT_TIMEOUT;
}
if (((_a = this.ws) === null || _a === void 0 ? void 0 : _a.readyState) === ws_1.default.OPEN) {
return [2 /*return*/];
}
return [2 /*return*/, new Promise(function (resolve, reject) {
var _a;
var opened = false;
var onOpen = function () {
opened = true;
resolve();
};
(_a = _this.ws) === null || _a === void 0 ? void 0 : _a.once('open', onOpen);
setTimeout(function () {
var _a;
if (!opened) {
(_a = _this.ws) === null || _a === void 0 ? void 0 : _a.removeListener('open', onOpen);
reject();
}
}, timeout);
})];
});
});
};
TradingViewWebSocket.prototype.tvSessionReady = function (timeout) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!timeout) {
timeout = TradingViewWebSocket.DEFAULT_TIMEOUT;
}
return [4 /*yield*/, this.wsReady(timeout)];
case 1:
_a.sent();
return [2 /*return*/, new Promise(function (resolve, reject) {
var interval = setInterval(function () {
if (_this.quoteSession !== null) {
resolve();
clearInterval(interval);
}
}, 100);
setTimeout(function () {
if (interval) {
clearInterval(interval);
reject();
}
}, timeout);
})];
}
});
});
};
TradingViewWebSocket.DEFAULT_TIMEOUT = 3000;
TradingViewWebSocket.UNAUTHORIZED_USER_TOKEN = 'unauthorized_user_token';
return TradingViewWebSocket;
}(events_1.EventEmitter));
exports.TradingViewWebSocket = TradingViewWebSocket;
//# sourceMappingURL=TradingViewWebSocket.js.map