physical-node
Version:
virtual physical network infrastructure layer for node
277 lines • 12.6 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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) : new P(function (resolve) { resolve(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 (_) 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];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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 };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
var promiseRequest_1 = require("./promiseRequest");
var config_1 = require("../config");
var WebSocket = require("ws");
var net = require("net");
var crypto = require("crypto");
var State;
(function (State) {
State[State["EMPTY"] = 0] = "EMPTY";
State[State["INITIATED"] = 1] = "INITIATED";
State[State["RESPONDED"] = 2] = "RESPONDED";
State[State["FINALIZING"] = 3] = "FINALIZING";
State[State["OPEN"] = 4] = "OPEN";
State[State["CLOSED"] = 5] = "CLOSED";
})(State || (State = {}));
var PhysicalNode = /** @class */ (function () {
function PhysicalNode() {
this.key = crypto.randomBytes(config_1.config.keyLength).toString('hex');
this.state = State.EMPTY;
this.onMessage = function (str) { console.warn("onmessage not set!"); };
this.onOpen = function () { console.warn("onOpen not set!"); };
this.onClose = function () { console.warn("onClose not set!"); };
this.socket = null;
}
PhysicalNode.prototype.close = function () {
if (this.state != State.CLOSED)
this.onClose();
this.state = State.CLOSED;
delete PhysicalNode.pendingConnections[this.key];
try {
this.socket && this.socket.close();
}
catch (e) {
if (e.message === 'WebSocket was closed before the connection was established') {
//allowed
}
else {
throw e;
}
}
};
PhysicalNode.prototype.open = function (ack) {
if (this.state != State.INITIATED)
throw ("wrong state exception");
this.state = State.FINALIZING;
if (ack.protocol !== "WebSocket-Consumer")
console.error("peer failed to honor contract");
if (!this.socket) {
this.buildConnectionHandler(config_1.config.pendingConnectionTimeout, true);
}
else {
this.openFinalizeHandshake();
}
};
PhysicalNode.prototype.openFinalizeHandshake = function () {
this.socket.send("RFT"); // ready for transmission
this.state = State.OPEN;
this.onOpen();
};
PhysicalNode.prototype.buildURI = function () {
var self = this;
return Promise.all([PhysicalNode.host, PhysicalNode.port]).then(function (res) {
return "ws://" + res[0] + ":" + res[1] + "/" + self.key;
});
};
PhysicalNode.prototype.buildConnectionHandler = function (timeout, override) {
if (timeout === void 0) { timeout = 0; }
if (override === void 0) { override = false; }
var self = this;
if (!override && PhysicalNode.pendingConnections[self.key])
throw ("key already in use");
PhysicalNode.pendingConnections[self.key] = function (ws) {
self.socket = ws;
self.socket.on('message', function (message) {
self.onMessage(message);
});
delete PhysicalNode.pendingConnections[self.key];
self.peerReady();
};
if (timeout)
setTimeout(function () {
if (PhysicalNode.pendingConnections[self.key])
self.close();
}, timeout);
};
PhysicalNode.prototype.peerReady = function () {
switch (this.state) {
case State.CLOSED:
this.socket.close();
break;
case State.INITIATED: break; //this is fine. check in open if socket is avaolable
case State.RESPONDED: break;
case State.FINALIZING:
this.openFinalizeHandshake();
break;
default: console.error("Peer ready but bad state: " + this.state);
}
};
PhysicalNode.prototype.request = function () {
return __awaiter(this, void 0, void 0, function () {
var _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
if (this.state != State.EMPTY)
throw ("wrong state exception");
this.state = State.INITIATED;
this.buildConnectionHandler();
_a = {
author: "physical-node",
supported: ["WebSocket-Provider", "WebSocket-Consumer"]
};
return [4 /*yield*/, this.buildURI()];
case 1: return [2 /*return*/, (_a.body = [_b.sent(), ""],
_a)];
}
});
});
};
PhysicalNode.prototype.connectToWebSocket = function (url) {
return __awaiter(this, void 0, void 0, function () {
var self, split, _a, _b;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
self = this;
_b = (_a = url).split;
return [4 /*yield*/, PhysicalNode.host];
case 1:
split = _b.apply(_a, [_c.sent()]);
if (split.length == 2)
url = split[0] + "127.0.0.1" + split[1];
this.socket = new WebSocket(url);
this.socket.onmessage = function (event) {
if (event.data == "RFT") {
self.socket.onmessage = function (event2) {
self.onMessage(event2.data);
};
self.state = State.OPEN;
self.onOpen();
}
else {
console.error("peer failed to honor contract");
console.error("out of state message: " + event.data);
self.close();
}
};
this.socket.onopen = function () { return console.log("opening socket"); };
this.socket.onclose = function () { return self.close(); };
return [2 /*return*/];
}
});
});
};
PhysicalNode.prototype.respond = function (synq) {
return __awaiter(this, void 0, void 0, function () {
var url, _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
if (this.state != State.EMPTY)
throw ("wrong state exception");
this.state = State.RESPONDED;
if (!synq.supported.includes("WebSocket-Provider")) return [3 /*break*/, 2];
url = synq.body[synq.supported.indexOf("WebSocket-Provider")];
return [4 /*yield*/, this.connectToWebSocket(url)];
case 1:
_b.sent(); //could be run asynchronously
return [2 /*return*/, {
author: "physical-node",
protocol: "WebSocket-Consumer",
body: [""]
}];
case 2:
if (!synq.supported.includes("WebSocket-Consumer")) return [3 /*break*/, 4];
this.buildConnectionHandler();
_a = {
author: "physical-node",
protocol: "WebSocket-Provider"
};
return [4 /*yield*/, this.buildURI()];
case 3: return [2 /*return*/, (_a.body = [_b.sent()],
_a)];
case 4: throw "No Compatible Protocol";
}
});
});
};
PhysicalNode.prototype.send = function (message) {
if (this.state != State.OPEN)
throw ("connection not open");
try {
this.socket.send(message);
}
catch (e) {
this.close();
throw ("failed to send message");
}
};
PhysicalNode.prototype.setOnClose = function (f) {
this.onClose = f;
};
PhysicalNode.prototype.setOnMessage = function (f) {
this.onMessage = f;
};
PhysicalNode.prototype.setOnOpen = function (f) {
this.onOpen = f;
};
/**
* initialize the webserver and handle incoming connections.
* @param port
* @private
*/
PhysicalNode.__init = function (port) {
if (port === void 0) { port = 0; }
if (PhysicalNode.initialized)
throw "Already Initialized";
PhysicalNode.initialized = true;
PhysicalNode.host = promiseRequest_1.promiseRequest("https://api.ipify.org");
var server = net.createServer();
PhysicalNode.port = Promise.resolve(config_1.config.port);
PhysicalNode.server = new WebSocket.Server({ port: config_1.config.port });
//find the instance associated with the socket
PhysicalNode.server.on('connection', function (ws, req) {
var key = req.url.slice(1);
var callback = key ? PhysicalNode.pendingConnections[key] : undefined;
if (!callback) {
ws.close(); // key not found
return;
}
delete PhysicalNode.pendingConnections[key];
callback(ws);
});
};
PhysicalNode.initialized = false;
PhysicalNode.pendingConnections = [];
return PhysicalNode;
}());
exports.PhysicalNode = PhysicalNode;
PhysicalNode.__init();
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