Content-Security-Policy builder tool in spring / java

By LiBePosted on Tuesday 29 June 2021Tuesday 29 June 2021Cat G33k, ProgrammesLeave a comment

The content security policy is a header that is used to coerce the resources that a webpage can read. It can be used to prevent malicious third party libraries, scripts, ads from capturing data or displaying content. Many languages offer tools to read or parse the Content-Security-Policy format which is described formally in https://www.w3.org/TR/CSP2/. But… Read More »

cheap node.js ‘fetch’ for people not wanting to use 3rd party libs

By LiBePosted on Monday 31 May 2021Monday 31 May 2021Cat G33k, ProgrammesLeave a comment

Using javascript/typescript ? rest ? using json ? Just http(s) >= 1.1 ? more and more people are getting tired with the idea of bundling external libraries in their own service / library. Can I just call another endpoint without adding 'fetch', 'axios' or anything ? Adding them is automatically enabling the burden of maintaining… Read More »

Jenkinsfile-GitHub : resolve $CHANGE_ID from branch build

By LiBePosted on Thursday 29 April 2021Thursday 29 April 2021Cat G33k, ProgrammesLeave a comment

It can be frustrating to realize that env.CHANGE_ID is not defined in your jenkins job, just because the current job is a branch build and not a pull request build. But this is only an obstacle, and can be overcome. Proof (assuming you know the url of the github api, the github user name, the… Read More »

Bind all your gprc endpoints with a simple and magic coRouter

By LiBePosted on Monday 29 March 2021Monday 29 March 2021Cat G33k, ProgrammesLeave a comment

grpc-services are quite simple, focused and performance oriented services. Instead of calling them with a format that needs complex marshalling / unmarshalling, and making use of a standard http 1.1 connection, grpc has a dedicated (therefore faster) generated code for each type. This protocol also indexes data fields by number, which permits to shrink the… Read More »

Typescript : can it validate that a key exists in an object ?

By LiBePosted on Sunday 28 February 2021Sunday 28 February 2021Cat G33k, ProgrammesLeave a comment

The problem is simpler than you think it is when you only look at the title.If an object contains a complex data structure like this :const structure = { a : { b : {c : { d : 1 } } } }With a function that can read inside the object :function read(path: string)… Read More »

Tetris geek animation

By LiBePosted on Wednesday 30 December 2020Wednesday 30 December 2020Cat G33k, Programmes, VideosLeave a comment

A geek animation that I have made for a new library for my company. https://lqfem.csb.app/ This is the end of 2020 now. See you in 2021. Read More »

Rendering react in Java

By LiBePosted on Monday 30 November 2020Tuesday 1 December 2020Cat G33k, ProgrammesLeave a comment

Before telling me that I am crazy, think about it again. There are plenty of ways to use server-side rendering today, and the practice of sending displayable data through the network has proven to be efficient : - rendering data logged in the same tool as for backend services - less client business logic, less… Read More »

spring-boot : declare yaml partials

By LiBePosted on Saturday 31 October 2020Saturday 31 October 2020Cat G33k, ProgrammesLeave a comment

It has been a question for me for many years : How can I inject spring properties from a library right into my application without any overhead * no copy / paste* no reference in the configuration* just by adding a maven / gradle dependency in the classpath. I also need to declare these partials… Read More »

A tiny reverse-proxy to start in ONE command

By LiBePosted on Wednesday 30 September 2020Wednesday 30 September 2020Cat G33k, ProgrammesLeave a comment

You are a devops or a software developer in a company and you are about to start hacking one program of the system.At some point, you will ask yourself that question : "How do I route the traffic to my local version of the application ?" (unless if you test everything remotely)Some obvious answers exist… Read More »

Kotlin Coroutines utilities

By LiBePosted on Monday 31 August 2020Monday 31 August 2020Cat G33k, ProgrammesLeave a comment

If you prefer to combine Kotlin Coroutines with popular solutions like Flowable, Streams or RxJava, where every strategy is readily available, this post is not for you. Otherwise, if you are interested in writing your own asynchronous strategies, here are two of them (in addition to my post from April 2019 : https://libetl.wordpress.com/2019/04/30/learn-how-to-group-expensive-calls-with-the-coroutines/). Batching strategyThat… Read More »