backend – Tarik Billa

Spring security method cannot decide pattern is MVC or not Spring Boot application exception

April 7, 2024 by Tarik

A migration occurred due to vulnerability CVE-2023-34035. In the event that you get an error like the following: This method cannot decide whether these patterns are Spring MVC patterns or not. If this endpoint is a Spring MVC endpoint, please use requestMatchers(MvcRequestMatcher); otherwise, please use requestMatchers(AntPathRequestMatcher). You should use a complete RequestMatcher. For example, if … Read more

REST API with active push notifications from server to client

December 29, 2023 by Tarik

I would use RabbitMQ and consume events forwarding them as push notifications. This will work while the user is not actively connected to the website and enhance the engagement with each user experience that will return to the website when notified for more information see How to setup basic web push notification functionality using a … Read more

What is the correct way to setup multiple logically organized sub folders in a terraform repo?

December 4, 2023 by Tarik

You are seeing this issue because terraform ignores subfolders, so those resources are not being included at all anymore. You would need to configure the subfolders to be Terraform Modules, and then include those modules in your root main.tf

Should data be formatted in the backend or front-end?

November 25, 2023 by Tarik

Great question. I do a layered MVC-inspired architecture. BACKEND I model (format) the data on the backend in accordance with it’s ‘natural’ order. In other words I follow the internal organization of the data. This is because my APIs are often used by multiple, changing or evolving clients and rewriting the API multiple times or … Read more

Django: Detect database backend

August 29, 2023 by Tarik

OK, so there’s two ways of doing it, as @Ricola3D said there’s the option of checking settings.DATABASES[‘default’][‘ENGINE’]: >>> from django.conf import settings >>> settings.DATABASES[‘default’][‘ENGINE’] ‘django.db.backends.sqlite3’ or ‘django.db.backends.postgresql_psycopg2′ But there’s also an (undocumented) vendor property on a connection: >>> from django.db import connection >>> connection.vendor ‘postgresql’ or ‘sqlite’ Either way works. I personally prefer connection.vendor as … Read more

Matplotlib and Pyplot.close() not releasing memory? – backend related Qt4Agg

August 18, 2023 by Tarik

I think the reason it is doing this is because as it goes through all of the different graphs it then runs out of memory probably because it isn’t releasing it properly. Why don’t you try creating about 3 or so programs each of which do a few graphs instead of one program doing all … Read more

Next.js API is back-end?

August 15, 2023 by Tarik

Yes. Next.js is a pre-rendered React app in the client-side that users can view and interact with and can be considered as front-end. At the same time, it also does server-side rendering and API routes which can perform server-side code and access data in the database and can be considered as back-end.

how to handle a post request in next.js?

July 10, 2023 by Tarik

To get POST requests working in Next.js API routes, you likely want to do 3 things. Limit the method to POST Use JSON.parse() to parse the JSON on in the route (not needed in NextJS v12+) Send a request to the backend https://nextjs.org/docs/api-routes/api-middlewares API Route API routes in Next.js by default support all types of … Read more

How to change matplotlib backends

June 27, 2023 by Tarik

Six years later and I came across a similar issue, when trying to decide which backend was available to use. Note see Caveats – below This code snippet works well for me: import matplotlib gui_env = [‘TKAgg’,’GTKAgg’,’Qt4Agg’,’WXAgg’] for gui in gui_env: try: print(“testing”, gui) matplotlib.use(gui,warn=False, force=True) from matplotlib import pyplot as plt break except: continue … Read more

SequelizeConnectionError: self signed certificate

May 30, 2023 by Tarik

This is due to an (accidental) breaking change in node-postgres version 8 (see this GitHub issue). The solution is to pass rejectUnauthorized: false to the sequelize connection parameters inside of dialectOptions>ssl, as described here by GitHub user jsanta, bypassing the SSL certificate check (which is okay when connecting to a trusted server over a secure … Read more