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Ich bin selbständiger IT Berater und Unternehmer in der Internet und Software Branche. Ich beschäftige mich mit Design, Enterprise Applikationen, Web Apps und SaaS Produkten. Ich entwerfe und entwickle Business Lösungen und Anwendungen. Ich helfe Unternehmen in Sachen Software Qualität und Wissenstransfer, z.B. mit Angular und Spring Boot.

REST next level: Crafting domain-driven web APIs by Julien Topçu @ Spring I/O 2023

Leider ist der Eintrag nur auf English verfügbar.

3. Dezember 2023 by Bjoern in Enterprise Software, Software, Web Applikation

Action Jackson! Effective JSON processing in Spring Boot Applications by Joris Kuipers @ Spring I/O 2023

Leider ist der Eintrag nur auf English verfügbar.

6. August 2023 by Bjoern in Enterprise Software, Software

JSON Visualization With JSON Crack

Leider ist der Eintrag nur auf English verfügbar.JSON Crack is a JSON visualization solution that allows to generated ad-hoc graph visualizations for your JSON data. While one of the huge advantages of JSON over other data formats certainly is that it's human-readable, more complex JSON documents containing linked data structures can become unwieldy and difficult to understand - at a cursory glimpse, at least. Such situations is where a tool like JSON Crack for visualizing data can come handy.

1. April 2023 by Bjoern in Software, Web Applikation

Problem Spring Web: A Library for Handling Problems in Spring Web MVC

Leider ist der Eintrag nur auf English verfügbar.Problem Spring Web is an implementation of the proposed application/problem+json HTTP API problem details response for Spring Web (im both its MVC and WebFlux flavours). Error responses should be a first-class citizen when it comes to providing REST APIs. These responses often are generated in an ad-hoc, non-standardised fashion, which not only makes handling such responses more difficult and tedious in client applications but also makes for less maintainable software in the back-end software ...

23. Oktober 2022 by Bjoern in Enterprise Software, Software, Web Applikation

Documenting REST APIs Provided by Express Applications

Leider ist der Eintrag nur auf English verfügbar.swagger-jsdoc is an NPM library that allows us to generate an OpenAPI specification for REST APIs provided by an Express application. swagger-jsdoc consumes YAML-formatted OpenAPI specification segments within JSDoc comments annotated with the @openapi annotation and turns those into a comprehensive OpenAPI specification for our API. This specification, in turn, can for example be used for automatically having a Swagger UI documentation page created for our REST APIs (using Swagger UI Express, for instance). While annotating Express ...

13. März 2022 by Bjoern in Software, Web Applikation

CORS: What It Is and How It Works

Leider ist der Eintrag nur auf English verfügbar.Expanding on last week's article on best practices for REST API Design I'd like to point to a specific aspect working REST APIs frequently entails: A browser security feature called "Cross-Origin Resource Sharing (CORS)". This feature allows you to define which resources provided by a web application are supposed to be accessible from which origin, which in turn typically is comprised of protocol, host / domain name and port. This website's origin for example is ...

2. Mai 2021 by Bjoern in Front End Entwicklung, Software, Web Applikation

REST API Design: Best Practices

Leider ist der Eintrag nur auf English verfügbar.It's probably safe to say that REST (REpresentational State Transfer - originally described by Roy Fielding) is the most widely used architectural pattern when it comes to APIs in web application contexts. From statelessness, to self-descriptive messages, and hypermedia as the engine of application state (HATEOAS) REST comes with quite a few principles, constraints, patterns, and flavours, not all of which are used or applied consistently with each REST API. REST often is a rather ...

25. April 2021 by Bjoern in Software, Web Applikation

The Richardson Maturity Model for REST APIs

Leider ist der Eintrag nur auf English verfügbar.On his website about software design patterns Martin Fowler provides an in-depth explanation of the Richardson Maturity Model for HTTP-based REST APIs by Leonard Richardson. According to that model REST APIs come in 4 levels of sophistication: Level 0, aka the "Everything is a POST request" model for example propagated by SOAP. This is basically tantamount to remote procedure invocation. Level 1 - Resources: Every resource is accessed through its own canonical URL. Level 2 - HTTP Verbs: ...

15. März 2020 by Bjoern in Software, Web Applikation

JSON Web Tokens: Downsides, Best Practices and Secure and Robust Alternatives

Leider ist der Eintrag nur auf English verfügbar.JSON Web Tokens (JWTs) nowadays are commonly used for transmitting authentication data in web applications, especially those exhibiting the widespread client-server architecture where you have a fat client / single-page application written in JavaScript as a front-end and a back-end server providing REST endpoints for use by that front-end client. However, while common there are good arguments against this practice. In a nutshell, JWT often are used for storing session data such user authorization and authentication ...

10. November 2019 by Bjoern in Enterprise Software, Front End Entwicklung, Software, Web Applikation

Jess Frazelle: “For the Love of Pipes”

Leider ist der Eintrag nur auf English verfügbar.Somewhat recently, Jess Frazelle wrote about her love of UNIX pipes, a sentiment I wholeheartedly share, to the extent that I think web apps should behave more like Unix programs by making data readily available via APIs so other applications can easily process that data. This, in a nutshell, is the Unix philosophy as stated by Doug McIlroy: Make each program do one thing well. To do a new job, build afresh rather than complicate old ...

6. Oktober 2019 by Bjoern in Software

Björn Wilmsmann

my blog. for you.

Reden wir über Digitales.