@iotize/device-com-socket.node
Version:
Socket communication protocol to communicate with an iotize
202 lines • 8.02 kB
JavaScript
"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (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 __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.SocketProtocol = void 0;
const byte_converter_1 = require("@iotize/common/byte-converter");
const api_1 = require("@iotize/tap/protocol/api");
const core_1 = require("@iotize/tap/protocol/core");
const net = __importStar(require("net"));
const rxjs_1 = require("rxjs");
const operators_1 = require("rxjs/operators");
const debug_1 = __importDefault(require("./debug"));
const TAG = 'SocketProtocol';
class SocketProtocol extends core_1.QueueComProtocol {
constructor(serverOptions) {
super();
if (serverOptions) {
this.setSocketOptions(serverOptions);
}
else {
this._socketOptions = {
host: SocketProtocol.DEFAULT_HOSTNAME,
port: 2000,
};
}
this._receiveStream = new rxjs_1.Subject();
}
get socketOptions() {
return this._socketOptions;
}
setSocketOptions(options) {
this._socketOptions = options;
if (!this._socketOptions.host) {
this._socketOptions.host = SocketProtocol.DEFAULT_HOSTNAME;
}
return this;
}
get options() {
return this._options;
}
_createSocket() {
const socket = new net.Socket();
socket.on('data', (data) => {
debug_1.default(TAG, 'onData', data);
this.notifyNewMessage(new Uint8Array(data));
});
socket.on('close', (data) => {
debug_1.default(TAG, 'socket closed event. parameter: ', data);
if (this.connectionState !== api_1.ConnectionState.DISCONNECTED) {
this.setConnectionState(api_1.ConnectionState.DISCONNECTED);
}
});
socket.on('end', () => {
debug_1.default(TAG, 'socket end event');
if (this.connectionState !== api_1.ConnectionState.DISCONNECTED) {
this.setConnectionState(api_1.ConnectionState.DISCONNECTED);
}
});
socket.on('error', (error) => {
const errorCode = error.code;
debug_1.default(TAG, 'socket error: ', error);
switch (errorCode) {
case 'ECONNRESET':
this.disconnect()
.toPromise()
.catch((err) => {
debug_1.default(TAG, `Cannot disconnect error`, err);
});
break;
case 'EHOSTUNREACH':
case 'EINVAL':
default:
if (this._connectionEmitter) {
debug_1.default(TAG, 'error during connection, notify failure...');
this._connectionEmitter.error(error);
this._connectionEmitter = undefined;
}
}
});
return socket;
}
_connect(options) {
if (this.socket) {
this.socket.end();
}
this.socket = this._createSocket();
return new rxjs_1.Observable((emitter) => {
debug_1.default(TAG, 'connecting...', this._options);
if (!this.socket) {
emitter.error(new Error('Socket should be defined'));
return;
}
this._connectionEmitter = emitter;
this.socket.connect(this._socketOptions.port, this._socketOptions.host || 'localhost', () => {
this._connectionEmitter = undefined;
emitter.next();
emitter.complete();
});
}).pipe(operators_1.share());
}
_disconnect(options) {
return rxjs_1.defer(() => {
if (this.socket) {
this.socket.end();
}
// if (this._receiveStream) {
// this._receiveStream.complete();
// }
return 'ok';
});
}
// send(data: Uint8Array): Observable<Uint8Array> {
// debug(TAG, "send()", data, " (length: ", data.length, ") buffer => ", data.buffer);
// var p = this.write(data)
// .then(() => {
// return this.readOneValue();
// })
// .then((data) => {
// debug("SocketProtocol", "Value read: ", data);
// return data;
// });
// return Observable.from(p);
// }
write(data) {
const sendBuffer = Buffer.from(data.buffer, 0, data.length);
const writePromise = new Promise((resolve, reject) => {
try {
if (!this.socket) {
throw new Error('Socket should be defined'); // TODO proper error
}
if (!this.socket.writable) {
throw new Error('Socket is not open or not writable'); // TODO proper error
}
debug_1.default(TAG, 'write()', sendBuffer);
const writeSuccess = this.socket.write(sendBuffer, () => {
debug_1.default(TAG, 'write', 'DONE');
resolve(sendBuffer);
});
if (!writeSuccess) {
throw new Error('Socket cannot write data due to unknown error'); // TODO proper error
}
}
catch (err) {
reject(err);
}
});
return writePromise;
}
read() {
return this.readOneValue(this.options.send.timeout);
}
readOneValue(timeoutMs = 5000) {
debug_1.default(TAG, 'readOneValue', 'INIT');
const startTime = new Date();
return this._receiveStream
.pipe(operators_1.take(1), operators_1.timeout(timeoutMs), operators_1.tap((data) => debug_1.default(TAG, 'readOneValue', 'RESOLVING...', byte_converter_1.bufferToHexString(data))), operators_1.catchError((err) => {
if (err.name === 'TimeoutError') {
err = api_1.ComProtocol.Errors.timeoutError({
timeout: timeoutMs,
protocol: this,
startTime,
msg: `Waiting for Tap response timeout after ${timeoutMs}ms`,
});
}
return rxjs_1.throwError(err);
}))
.toPromise();
}
notifyNewMessage(message) {
// if (!this._receiveStream){
// throw new Error("IllegalState no receive stream");
// }
debug_1.default(`notifyNewMessage() ${byte_converter_1.bufferToHexString(message)}`);
this._receiveStream.next(message);
}
receiveStream() {
return this._receiveStream;
}
}
exports.SocketProtocol = SocketProtocol;
SocketProtocol.DEFAULT_HOSTNAME = 'localhost';
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