Modern Web APIs Node.js & TypeScript Manuel Rauber @manuelrauber Consultant 

Consultant @ Thinktecture AG ! [email protected] " @manuelrauber # https://manuel-rauber .com Microsoft MVP The guy who’s talkin’ Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Manuel Rauber 

Web APIs Node.js TypeScript Restify Database Deployment Examples Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Talking Points 

Overview Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Web APIs Web API Node.js/.NETCore Browser GET /api/customer/1 Authorization: Bearer File system PostgreSQL Elasticsearch validate token get token STS 1 2 3 4 

Overview • REST APIs, HTTP APIs, “whatever APIs” • Use case oriented: model functional services with dedicated interfaces • Can use several other services for data aggregation • Secured by tokens • Consumable by every HTTPS speaking client • Can involve WebSocket for real-time Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Web APIs HTTP HTTPS WebSocket Service A Service B Service C Web APIs (ASP.NET, Node.js, …) AuthN & AuthZ Client 

Node.js Node.js is not jQuery in cool ;-) Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 

Intro • Server-side JavaScript powered by Chrome’s V8 JavaScript engine • Asynchronous, event-driven I/O API • Package management via Node Package Manager (npm) or YARN • Cross platform: Linux, macOS, Windows • Work in progress: Microsoft’s ChakraCore as an alternative runtime Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Node.js 

Features • ECMAScript 6 • Experimental ECMAScript 7 • http://node.green/ • Classes • Typed arrays • Fat Arrow/Lambda Expressions • Templated Strings Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Node.js 

Server Architecture Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Node.js 

Pros • Full stack JS’ish development • Universal JavaScript: Share code between client & server • Open Source loving community • Enterprise proven: Netflix, Paypal, Groupon, Walmart, … Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Node.js https://nodejs.org/static/documents/casestudies/Node_CaseStudy_Nasa_FNL.pdf 

Watch out! • Single threaded Event Loop: Avoid heavy CPU usage • Utilizes one CPU only: Scale via clustering • Relational databases can be strange – but it’s getting better! • Code is (often the only) documentation Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Node.js 

• Designed by Anders Hejlsberg, who also designed C# • Typed superset of JavaScript that transpiles to plain JavaScript • Types are optional, but useful metadata for tooling • Static Code Analysis • Refactoring • Linting • IntelliSense Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 TypeScript 

• Node.js module to build Web APIs • Middleware support • Client & server components • Routing • Useful plugins included • Used by Netflix, reddit, npm Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Restify Middleware 1 // Server logic next() // more logic Middleware 2 // Server logic next() // more logic Middleware 3 // Server logic // more logic Request Response Client Logging Authentication … 

• Adapters for a lot of databases • NoSQL databases MongoDB, CouchDB, … • Relational databases MSSQL, PostgreSQL, MySQL, SQLite, … • TypeORM as a type-safe ORM, but currently in alpha state Multiple databases, transactions, migrations, query API • Alternative: SequelizeJS, more mature Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Databases 

• Dockerize it! • Deployable via Docker containers on • Microsoft Azure: Container Registry, Container Services, Container Instances • IBM Bluemix Container Services • Amazon EC2 Container Services • Google Cloud Platform • Runnable via • Simple Azure Linux-based Web Apps • Docker Swarm • Kubernetes Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Deployment 

Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 DEMO 

The unspoken things of the talk • API Rate Limiting/Throttling • Versioning • Caching • Gzipping • Content Negotiation • Cross-origin resource sharing (CORS) • Documentation • API Discovery • Real-time communication via WebSocket (e.g. Socket.io) • Security Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 That’s all? 

• Node.js overview Feature support, Node.js server, pros, watch outs • Web APIs with restify Routing, middlewares • Relational databases via TypeORM Models, query API • A lot more to discover Real-time communication, security, throttling, rate limiting Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Summary 

eBook & entwickler .de API special Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Read on! https://entwickler .de/press/shortcuts/die-serverwelt-von-node-js-2-262553.html https://entwickler .de/entwickler-magazin/entwickler-magazin-spezial-vol-13-apis-579812053.html 

• Node.js: https://nodejs.org/ • Node.js at Paypal: https://www.paypal-engineering.com/tag/node-js/ • Node.js at Netflix: http://techblog.netflix.com/search/label/node.js • Node.js at scale: http://venturebeat.com/2012/01/24/node-at-google-mozilla-yahoo/ • Restify: http://restify.com/ • TypeORM: https://typeorm.github.io/ • SequelizeJS: http://sequelizejs.com/ Modern Web APIs with Node.js & TypeScript International JavaScript Conference 2017 Resources 

Thank you! Questions? Repository Modern Web APIs with Node.js & TypeScript https://github.com/thinktecture/javascript-conference-2017-nodejs-typescript Contact @manuelrauber [email protected]