typedserver/ts/servertools/classes.server.ts

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import * as plugins from '../plugins.js';
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import { Route } from './classes.route.js';
import { Handler } from './classes.handler.js';
import { HandlerTypedRouter } from './classes.handlertypedrouter.js';
// export types
import { setupRobots } from './tools.robots.js';
import { setupManifest } from './tools.manifest.js';
import { Sitemap } from './classes.sitemap.js';
import { Feed } from './classes.feed.js';
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import { type IServerOptions } from '../typedserver.classes.typedserver.js';
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export type TServerStatus = 'initiated' | 'running' | 'stopped';
/**
* can be used to spawn a server to answer http/https calls
* for constructor options see [[IServerOptions]]
*/
export class Server {
public httpServer: plugins.http.Server | plugins.https.Server;
public expressAppInstance: plugins.express.Application;
public routeObjectMap = new Array<Route>();
public options: IServerOptions;
public serverStatus: TServerStatus = 'initiated';
public feed: Feed;
public sitemap: Sitemap;
public executeAfterStartFunctions: (() => Promise<void>)[] = [];
// do stuff when server is ready
private startedDeferred = plugins.smartpromise.defer();
// tslint:disable-next-line:member-ordering
public startedPromise = this.startedDeferred.promise;
private socketMap = new plugins.lik.ObjectMap<plugins.net.Socket>();
constructor(optionsArg: IServerOptions) {
this.options = {
...optionsArg,
};
}
/**
* allows updating of server options
* @param optionsArg
*/
public updateServerOptions(optionsArg: IServerOptions) {
Object.assign(this.options, optionsArg);
}
public addTypedRequest(typedrouter: plugins.typedrequest.TypedRouter) {
this.addRoute('/typedrequest', new HandlerTypedRouter(typedrouter));
}
public addTypedSocket(typedrouter: plugins.typedrequest.TypedRouter): void {
this.executeAfterStartFunctions.push(async () => {
plugins.typedsocket.TypedSocket.createServer(typedrouter, this);
});
}
public addRoute(routeStringArg: string, handlerArg?: Handler) {
const route = new Route(this, routeStringArg);
if (handlerArg) {
route.addHandler(handlerArg);
}
this.routeObjectMap.push(route);
return route;
}
public addRouteBefore(routeStringArg: string, handlerArg?: Handler) {
const route = new Route(this, routeStringArg);
if (handlerArg) {
route.addHandler(handlerArg);
}
this.routeObjectMap.unshift(route);
return route;
}
public async start(portArg: number | string = this.options.port, doListen = true) {
const done = plugins.smartpromise.defer();
if (typeof portArg === 'string') {
portArg = parseInt(portArg);
}
this.expressAppInstance = plugins.express();
if (!this.httpServer && (!this.options.privateKey || !this.options.publicKey)) {
console.log('Got no SSL certificates. Please ensure encryption using e.g. a reverse proxy');
this.httpServer = plugins.http.createServer(this.expressAppInstance);
} else if (!this.httpServer) {
console.log('Got SSL certificate. Using it for the http server');
this.httpServer = plugins.https.createServer(
{
key: this.options.privateKey,
cert: this.options.publicKey,
},
this.expressAppInstance
);
} else {
console.log('Using externally supplied http server');
}
this.httpServer.keepAliveTimeout = 600 * 1000;
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this.httpServer.headersTimeout = 20 * 1000;
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// general request handlling
this.expressAppInstance.use((req, res, next) => {
next();
});
// forceSsl
if (this.options.forceSsl) {
this.expressAppInstance.set('forceSSLOptions', {
enable301Redirects: true,
trustXFPHeader: true,
sslRequiredMessage: 'SSL Required.',
});
this.expressAppInstance.use(plugins.expressForceSsl);
}
// cors
if (this.options.cors) {
const cors = plugins.cors({
allowedHeaders: '*',
methods: '*',
origin: '*',
});
this.expressAppInstance.use(cors);
this.expressAppInstance.options('/*', cors);
}
this.expressAppInstance.use((req, res, next) => {
res.setHeader('Cross-Origin-Resource-Policy', 'cross-origin');
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res.setHeader('Cross-Origin-Embedder-Policy', 'require-corp');
res.setHeader('Cross-Origin-Opener-Policy', 'same-origin');
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res.setHeader('Access-Control-Allow-Origin', '*');
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res.setHeader('SERVEZONE_ROUTE', 'LOSSLESS_ORIGIN_CONTAINER');
res.setHeader('Cache-Control', 'no-cache');
res.setHeader('Expires', new Date(Date.now()).toUTCString());
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next();
});
// body parsing
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this.expressAppInstance.use(async (req, res, next) => {
if (req.headers['content-type'] === 'application/json') {
let data = '';
req.on('data', chunk => {
data += chunk;
});
req.on('end', () => {
try {
req.body = plugins.smartjson.parse(data);
next();
} catch (error) {
res.status(400).send('Invalid JSON');
}
});
} else {
next();
}
});
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this.expressAppInstance.use(plugins.bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded
// robots
if (this.options.robots && this.options.domain) {
await setupRobots(this, this.options.domain);
}
// manifest.json
if (this.options.manifest) {
await setupManifest(this.expressAppInstance, this.options.manifest);
}
// sitemaps
if (this.options.sitemap) {
this.sitemap = new Sitemap(this);
}
if (this.options.feed) {
// feed
this.feed = new Feed(this);
}
// appVersion
if (this.options.appVersion) {
this.expressAppInstance.use((req, res, next) => {
res.set('appversion', this.options.appVersion);
next();
});
this.addRoute(
'/appversion',
new Handler('GET', async (req, res) => {
res.write(this.options.appVersion);
res.end();
})
);
}
// set up routes in for express
await this.routeObjectMap.forEach(async (routeArg) => {
console.log(
`"${routeArg.routeString}" maps to ${routeArg.handlerObjectMap.getArray().length} handlers`
);
const expressRoute = this.expressAppInstance.route(routeArg.routeString);
routeArg.handlerObjectMap.forEach(async (handler) => {
console.log(` -> ${handler.httpMethod}`);
switch (handler.httpMethod) {
case 'GET':
expressRoute.get(handler.handlerFunction);
return;
case 'POST':
expressRoute.post(handler.handlerFunction);
return;
case 'PUT':
expressRoute.put(handler.handlerFunction);
return;
case 'ALL':
expressRoute.all(handler.handlerFunction);
return;
case 'DELETE':
expressRoute.delete(handler.handlerFunction);
return;
default:
return;
}
});
});
if (this.options.defaultAnswer) {
this.expressAppInstance.get('/', async (request, response) => {
response.send(await this.options.defaultAnswer());
});
}
this.httpServer.on('connection', (connection: plugins.net.Socket) => {
this.socketMap.add(connection);
console.log(`added connection. now ${this.socketMap.getArray().length} sockets connected.`);
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const closeListener = () => {
console.log('connection closed');
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cleanupConnection();
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};
const errorListener = () => {
console.log('connection errored');
cleanupConnection();
};
const endListener = () => {
console.log('connection ended');
cleanupConnection();
};
const timeoutListener = () => {
console.log('connection timed out');
cleanupConnection();
};
connection.addListener('close', closeListener);
connection.addListener('error', errorListener);
connection.addListener('end', endListener);
connection.addListener('timeout', timeoutListener);
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const cleanupConnection = async () => {
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connection.removeListener('close', closeListener);
connection.removeListener('error', errorListener);
connection.removeListener('end', endListener);
connection.removeListener('timeout', timeoutListener);
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if (this.socketMap.checkForObject(connection)) {
this.socketMap.remove(connection);
console.log(`removed connection. ${this.socketMap.getArray().length} sockets remaining.`);
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await plugins.smartdelay.delayFor(0);
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if (connection.destroyed === false) {
connection.destroy();
}
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}
};
});
// finally listen on a port
if (doListen) {
this.httpServer.listen(portArg, '0.0.0.0', () => {
console.log(`now listening on ${portArg}!`);
this.startedDeferred.resolve();
this.serverStatus = 'running';
done.resolve();
});
} else {
console.log(
'The server does not listen on a network stack and instead expects to get handed requests by other mechanics'
);
}
await done.promise;
for (const executeAfterStartFunction of this.executeAfterStartFunctions) {
await executeAfterStartFunction();
}
}
public getHttpServer() {
return this.httpServer;
}
public getExpressAppInstance() {
return this.expressAppInstance;
}
public async stop() {
const done = plugins.smartpromise.defer();
if (this.httpServer) {
this.httpServer.close(async () => {
this.serverStatus = 'stopped';
done.resolve();
});
await this.socketMap.forEach(async (socket) => {
socket.destroy();
});
} else {
throw new Error('There is no Server to be stopped. Have you started it?');
}
return await done.promise;
}
/**
* allows handling requests and responses that come from other
* @param req
* @param res
*/
public async handleReqRes(req: plugins.express.Request, res: plugins.express.Response) {
this.expressAppInstance(req, res);
}
}