node.js : a file system that replicates to S3

By LiBePosted on Wednesday 29 September 2021Wednesday 29 September 2021Cat G33k, ProgrammesLeave a comment

Sometimes it would be handy to use S3 like you used a local filesystem.fs.writeFile would write a file, fs.readFile would read one, and fs.stat would use get some information about it.It would be a bucket that you can read from a local cache if you need to read the same file twice. Nothing can prevent… Read More »

next.js : dynamic site sections with just one javascript module

By LiBePosted on Tuesday 31 August 2021Tuesday 31 August 2021Cat G33k, ProgrammesLeave a comment

next.js has become a very simple and quiet tool to build showcase sites or documentation pages.The contract for writing pages only consists in writing ecmascript modules, which is widely accepted granularity in many node.js frameworks today.The next.js configuration almost resides entirely in the root directory, and you only have a few things that you have… Read More »

next.js : how to prevail against imported css in node_modules

By LiBePosted on Friday 30 July 2021Friday 30 July 2021Cat G33k, ProgrammesLeave a comment

Have you seen this message before ? https://nextjs.org/docs/messages/css-npm "One of your dependencies (node_modules) imports a CSS file." Well, what ? You are just importing styles in one of your node_modules package like this : import styles from "./file.css" Usually it is a source of frustration. css modules can only be imported from pages.When you try… Read More »

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 »