Скачать или смотреть Combine Multiple Routes into One Serverless Function on Vercel Using Python

Learn how to combine multiple API routes into a single serverless function on Vercel using `Python` with the Sanic framework, optimizing for speed and efficiency!
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How to Combine Multiple Routes into One Serverless Function on Vercel Using Python

Are you running a Next.js application with a Python API backend hosted on Vercel? If so, you may be running into a frustrating limitation: Vercel caps the number of serverless functions that you can create at 24. Not only is this a constraint, but it also means you might face issues with cold starts and optimization if not managed properly. Fortunately, this post will guide you through the process of combining multiple API routes into a single serverless function using Python's Sanic framework.

The Challenge

In your current setup, you are able to define multiple routes, but hitting the route api/other_route results in a frustrating 404 error. You may have considered creating a separate file for other_route.py, but it’s best to avoid unnecessary serverless functions to optimize performance.

The Solution

The good news is that you can keep your code within a single file while effectively managing different endpoints. To do this, you'll create a configuration file for Vercel which will route the API requests accordingly.

Step 1: Set Up Your Vercel Configuration

To combine your routes, the first step is to create a vercel.json configuration file in the root of your project. This file will instruct Vercel on how to handle incoming requests:

[[See Video to Reveal this Text or Code Snippet]]

In this configuration:

The src property specifies that any request made to /api/{something} should be directed to the api/index.py file.

The dest property indicates where the request should be routed within your project.

Step 2: Update Your Python Code

Next, you will need to modify your existing Python code in index.py. Ensure that your routes are all defined in one location, streamlining how your application processes incoming requests.

Here’s what the modified version of your code might look like:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Adjusting Route Parameters

For the other_route method, you might also need to ensure the arguments are correctly defined. Here’s a recommended adjustment:

[[See Video to Reveal this Text or Code Snippet]]

This update will allow Vercel to correctly parse and route requests to other_route.

Conclusion

By strategically combining your routes into a single serverless function, you alleviate the limitations imposed by the number of functions allowed on Vercel, while also improving the performance of your application. By using the Sanic framework along with a suitable vercel.json configuration, you can successfully manage multiple API endpoints under one roof.

Implementing these changes not only helps avoid the 404 errors you previously encountered but also optimizes your serverless application for better performance!

Now you are well-equipped to tackle this challenge head-on. Happy coding!