#Use python with abyss web server code

The code in this article can be used as a boilerplate for your project. That’s it! With only 1 script file, we can create an asynchronous web server using aiohttp and aiopg in Python. # Built-in library import json from uuid import uuid4 # Third-party library from aiohttp import web from aiopg.sa import create_engine class WebServer: def _init_( self, **kwargs: dict): self.app = web.Application() self.host = kwargs self.port = kwargs self.dbConf = kwargs self.dbEngine = None ssionToUser = Final Words First, we need to initialize the web server application using aiohttp and create a database engine using aiopg. This web server has 2 REST APIs, for user login and user logout and 1 PostgreSQL database engine. We will create a web server with aiohttp & aiopg, an asynchronous library for creating a web server and interacting with databases using asyncio. You can read more detail about asyncio here Initialize web server A coroutine will pause the process whenever encounter await keyword and computer will handle other coroutines then back to the paused coroutine when the return value from the awaited process is available. It uses async for transforming a function into a coroutine (a special function that can be paused in the process). In Python, we can create asynchronous applications using asyncio library. So web servers can handle many requests efficiently, maximize the waiting from I/O processes.

This useful when we have a project with I/O bound (a project with a lot of I/O processes such as web servers that handle many requests and interact with databases or other services). It means when there is a step that needs to wait for a return value from other processes, it will handle other tasks and get back to the task before when the return value is available. After that, it executes another task.Īsynchronous program, on the other hand, is a program that executes tasks concurrently.

If there is a step that needs to wait for a return value from other processes (e.g database queries, request to other APIs), it blocks the program until the return value is available then continues the task. It only executes another task when the other task before has completely executed. Synchronous program is a program that executes every task one-by-one. If you looking for a depth explanation about asynchronous in Python, you can click the link in the Synchronous vs Asynchronous section. The ‘server started’ message will appear. The code: python -m rver Type the code above into your command prompt or terminal, depending on your system.

For a dynamic web server, you will need a Python framework like Django or Flask. My purpose is to bring insight about how is the structure of an asynchronous web server looks likes. To create a web server, you will need a Python HTTP server module that can be used as a static file server. This article is mainly focused on the structure of the code using aiohttp and aiopg.

#Use python with abyss web server how to

Faced hard times learning asynchronous programming and figuring out how to create an asynchronous web server, I decided to share how to create it. For the past year, I was working on a project that needs asynchronous web servers for handling thousands of user connections simultaneously and broadcasting data to users in real-time.