How to use Supabase edge functions?

 

Step 1: Set Up Your Supabase Project

 

To get started with Supabase edge functions, you first need to set up a Supabase project.

1. Navigate to the Supabase website and sign up for an account or log in to your existing account.

2. Click on "New Project" to create a new project. Fill in the necessary details such as project name, database password, and other settings as required. Click "Create New Project."

 

Step 2: Install the Supabase CLI

 

The Supabase CLI is necessary for managing your edge functions. You can install it using npm.

npm install -g supabase

Confirm the installation by checking the version:

supabase --version

 

Step 3: Generate a New Edge Function

 

Once your Supabase CLI is set up, you can create a new edge function.

1. Navigate to your project directory using the terminal.

2. Use the following command to create a new edge function:

   ```bash
   supabase functions new function_name
   ```

3. This will create a new directory with the name of the function (function_name) containing an index.ts file and other necessary configuration files.

 

Step 4: Write Your Edge Function

 

Open the index.ts file inside the generated function directory. This file is where you will write your edge function logic. A basic function might look like this:

export async function handleRequest(request: Request): Promise<Response> {
  const { pathname } = new URL(request.url);
  
  if (pathname === "/hello") {
    return new Response("Hello, Supabase Edge Functions!", { status: 200 });
  }

  return new Response("Not found", { status: 404 });
}

 

Step 5: Deploy Your Edge Function

 

To deploy your function to Supabase, use the following command:

supabase functions deploy function_name

This command will bundle and upload your edge function to Supabase, making it accessible via your Supabase project's API URL.

 

Step 6: Test Your Edge Function

 

After deploying, test your edge function to ensure it works as expected.

1. Use a tool like curl or Postman to send a request to your function's URL.

2. The URL format will be something like:

   ```
   https://.supabase.co/functions/v1/function_name
   ```

3. For example, with curl:

   ```bash
   curl https://.supabase.co/functions/v1/hello
   ```

Expect a response: "Hello, Supabase Edge Functions!" if configured like in the example above.

 

Step 7: Monitor and Update Your Function

 

Continue to monitor your function for any issues and update as necessary.

1. Use the Supabase Dashboard to view logs.

2. Deploy updates using the supabase functions deploy function_name command after making changes.

 

Remember to replace placeholders like <PROJECT-REF> with actual values specific to your Supabase project configuration. This step-by-step guide should help you start using Supabase edge functions effectively.