Questions tagged [flask]

Flask is a web application framework for Python.

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Flask/SQLAlchemy Object Classes across app layers

I’m looking for advice where the business logic and data layers in a Flask/SQLAlchemy-based app all use essentially the same object class. As an example, my app includes a task scheduler. Tasks ...
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2answers
81 views

REST API Input Validation Strategy

I am implementing a REST API and need to validate the JSON API inputs for the CREATE and UPDATE endpoints. The goal is to send a 400 error prior to doing any processing if the inputs are not valid. ...
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20 views

Service worker / caching a whole API in a Flask app?

I'm building a small scale app based on the Flask micro framework. In it, I have a service worker that caches the basic shell of my app (HTML, CSS and JS). However, I have dynamic content that is ...
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2answers
96 views

Architecture for RESTful API and a web admin

I am trying to build a RESTful API (using Flask) that will be later consumed by a mobile application. I also have a requirement to build a Web Admin. The Web Admin will have functionality that will ...
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1answer
44 views

Abstracting a set of services behind a common interface

Yay or nay? I have several related but separate services that are to be run in different processes. They execute a particular task unique to the service. Their call signature is similar, but the name ...
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2answers
305 views

Clearing up misconceptions about a Flask backend and client-side rendering

I am building a website and along the way I have come across a lot of things I didn't know about and was hoping to get some help in understanding some of them. I started building a website using ...
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1answer
782 views

Communication in a microservices architecture with flask and REST

Components involved: Mobile Client Microservices API Gateway Each microservice is a Flask application exposing a RESTful API. When a request is made by the mobile client, it is sent to the API ...
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1answer
31 views

An approach to send the contents of a file on the server to the client in real-time

I have a relatively simple front in good ol' JQuery, that makes a POST Request to a Flask Python web server, that runs a Python script using the subprocess module. Here's the whole route for ...
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120 views

Separate server for Flask-SocketIO chat functionality?

I currently have a Flask application which acts as the backend for my website. I intend to add live private chat functionality to my website using Flask-SocketIO. I was wondering, is it better to ...
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1answer
113 views

Security and performance considerations when creating chat system on a Flask backend

I am building a website with the Flask framework. One functionality of the site will be that users can send messages to each other. I created a prototype of this using Flask WTF forms. The basic ...
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2answers
33 views

Organizing specific human messaging in the web applicaiton code

Python (Flask) web application has a big portion of email/SMS messages generated by templates, translated by Flask-Babel. To my eye, having literal constants for the message in views, among other ...
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2answers
715 views

Two processes in a single docker container or two services connecting to the same db?

I recently started moving a monolithic application to microservices architecture using docker containers. The general idea of the app is: scraping data -> format the data -> save the data to MySQL -...
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1answer
10k views

Why is flask CLI recommended over Flask.run?

In Flask 0.11 a flask CLI was introduced. Both the docs and the changelog state this is recommended. Development Server docs: Starting with Flask 0.11 there are multiple built-in ways to run a ...
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173 views

Choosing Between Ruby and Python for a FS Microservice Backend in Node App [closed]

I have been working on a application that up until now has been pure Node. However I am concerned about performance and overhead since the application performs a lot of file system operations (Copy ...
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1answer
634 views

How to think about a schedule that pulls from a database as objects

I am working on a personal project using Python. I have been using version control to the best of my abilities and if you would like to check it out and run the app https://github.com/CodeAmend/old-...
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1answer
680 views

Hard time understanding structure of web apps w JS frameworks? [closed]

I'm having a difficult time understanding how web applications work. Please help me understand without giving me google definitions. Baby steps/words would be appreciated =) From what I understand so ...
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1answer
556 views

How to stop someone from calling URL on server

I am very new to web development and am trying to create a website using client/server model. From what I understand, the front-end (client-side) calls URLs specified on the server to get information. ...
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1answer
97 views

Security Pattern to store SSH Keys

I am writing a simple flask application to submit scientific tasks to remote HPC resources. My application in background talks to remote machines via SSH (because it is widely available on various HPC ...
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3answers
6k views

Global request context - anti-pattern?

I was talking today to a colleague of mine about Python web frameworks and our impressions about them. I told him I think Flask having a global request smells badly and is an anti-pattern. The docs ...
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1answer
732 views

Why does flask use Jinja2 and not xpath?

I'm just starting out with python and since I'm coming from a PHP background (thus have to adjust my mind to wrap around new concepts) one major question still stands without answer - why does Flask ...
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1answer
616 views

How safe is it to rely on thirdparty Python libs in a production product?

I'm new to Python and come from the write-everything-yourself world of PHP (at least this is how I always approached it). I'm using Flask, WTForms, Jinja2, and I've just discovered Flask-Login which ...
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1answer
5k views

How to divide work among development team members in a website project using MVC pattern

I am working on a webapp project using flask framework and sqlalchemy orm in python. Its the first time I am working on a project like this and I am having trouble in how to divide work properly among ...
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1answer
2k views

How do I structure a larger Flask application?

I have a relatively simple web application that is written in Python using the Flask microframework. I've really enjoyed Flask's ease of use, however, as the app has grown larger it has started to ...