n8n
Version:
n8n Workflow Automation Tool
201 lines • 8.75 kB
JavaScript
;
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Object.defineProperty(exports, "__esModule", { value: true });
exports.TaskBrokerServer = void 0;
const config_1 = require("@n8n/config");
const di_1 = require("@n8n/di");
const compression_1 = __importDefault(require("compression"));
const express_1 = __importDefault(require("express"));
const express_rate_limit_1 = require("express-rate-limit");
const n8n_core_1 = require("n8n-core");
const a = __importStar(require("node:assert/strict"));
const node_crypto_1 = require("node:crypto");
const node_http_1 = require("node:http");
const node_url_1 = require("node:url");
const ws_1 = require("ws");
const constants_1 = require("../../constants");
const middlewares_1 = require("../../middlewares");
const response_helper_1 = require("../../response-helper");
const task_broker_auth_controller_1 = require("../../task-runners/task-broker/auth/task-broker-auth.controller");
const task_broker_ws_server_1 = require("../../task-runners/task-broker/task-broker-ws-server");
let TaskBrokerServer = class TaskBrokerServer {
get port() {
return this.server?.address()?.port;
}
get upgradeEndpoint() {
return `${this.getEndpointBasePath()}/_ws`;
}
constructor(logger, globalConfig, authController, taskBrokerWsServer) {
this.logger = logger;
this.globalConfig = globalConfig;
this.authController = authController;
this.taskBrokerWsServer = taskBrokerWsServer;
this.handleUpgradeRequest = (request, socket, head) => {
if ((0, node_url_1.parse)(request.url).pathname !== this.upgradeEndpoint) {
socket.write('HTTP/1.1 404 Not Found\r\n\r\n');
socket.destroy();
return;
}
if (!this.wsServer) {
socket.write('HTTP/1.1 503 Service Unavailable\r\n\r\n');
socket.destroy();
return;
}
this.wsServer.handleUpgrade(request, socket, head, (ws) => {
request.ws = ws;
const response = new node_http_1.ServerResponse(request);
response.writeHead = (statusCode) => {
if (statusCode > 200) {
this.logger.error(`Task runner connection attempt failed with status code ${statusCode}`);
ws.close();
}
return response;
};
this.app.handle(request, response);
});
};
this.app = (0, express_1.default)();
this.app.disable('x-powered-by');
if (!this.globalConfig.taskRunners.authToken) {
this.globalConfig.taskRunners.authToken = (0, node_crypto_1.randomBytes)(32).toString('hex');
}
}
async start() {
await this.setupHttpServer();
this.setupWsServer();
if (!constants_1.inTest) {
await this.setupErrorHandlers();
}
this.setupCommonMiddlewares();
this.configureRoutes();
}
async stop() {
if (this.wsServer) {
this.wsServer.close();
this.wsServer = undefined;
}
const stopHttpServerTask = (async () => {
if (this.server) {
await new Promise((resolve) => this.server?.close(() => resolve()));
this.server = undefined;
}
})();
const stopWsServerTask = this.taskBrokerWsServer.stop();
await Promise.all([stopHttpServerTask, stopWsServerTask]);
}
async setupHttpServer() {
const { app } = this;
this.server = (0, node_http_1.createServer)(app);
const { taskRunners: { port, listenAddress: address }, } = this.globalConfig;
this.server.on('error', (error) => {
if (error.code === 'EADDRINUSE') {
this.logger.info(`n8n Task Broker's port ${port} is already in use. Do you have another instance of n8n running already?`);
process.exit(1);
}
});
await new Promise((resolve) => {
a.ok(this.server);
this.server.listen(port, address, () => resolve());
});
this.logger.info(`n8n Task Broker ready on ${address}, port ${port}`);
}
setupWsServer() {
const { authToken } = this.globalConfig.taskRunners;
a.ok(authToken);
a.ok(this.server);
this.wsServer = new ws_1.Server({
noServer: true,
maxPayload: this.globalConfig.taskRunners.maxPayload,
});
this.server.on('upgrade', this.handleUpgradeRequest);
this.taskBrokerWsServer.start();
}
async setupErrorHandlers() {
const { app } = this;
if (this.globalConfig.sentry.backendDsn) {
const { setupExpressErrorHandler } = await Promise.resolve().then(() => __importStar(require('@sentry/node')));
setupExpressErrorHandler(app);
}
}
setupCommonMiddlewares() {
this.app.use((0, compression_1.default)());
this.app.use(middlewares_1.rawBodyReader);
this.app.use(middlewares_1.bodyParser);
}
configureRoutes() {
const createRateLimiter = () => (0, express_rate_limit_1.rateLimit)({
windowMs: 1000,
limit: 5,
message: { message: 'Too many requests' },
});
this.app.use(this.upgradeEndpoint, createRateLimiter(), this.authController.authMiddleware, (req, res) => this.taskBrokerWsServer.handleRequest(req, res));
const authEndpoint = `${this.getEndpointBasePath()}/auth`;
this.app.post(authEndpoint, createRateLimiter(), (0, response_helper_1.send)(async (req) => await this.authController.createGrantToken(req)));
this.app.get('/healthz', (_, res) => {
res.send({ status: 'ok' });
});
}
getEndpointBasePath() {
let path = this.globalConfig.taskRunners.path;
if (!path.startsWith('/')) {
path = `/${path}`;
}
if (path.endsWith('/')) {
path = path.slice(-1);
}
return path;
}
};
exports.TaskBrokerServer = TaskBrokerServer;
exports.TaskBrokerServer = TaskBrokerServer = __decorate([
(0, di_1.Service)(),
__metadata("design:paramtypes", [n8n_core_1.Logger,
config_1.GlobalConfig,
task_broker_auth_controller_1.TaskBrokerAuthController,
task_broker_ws_server_1.TaskBrokerWsServer])
], TaskBrokerServer);
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