Generate Images with Amazon Bedrock - Supabase

Amazon Bedrock is a fully managed service that offers a choice of high-performing foundation models (FMs) from leading AI companies like AI21 Labs, Anthropic, Cohere, Meta, Mistral AI, Stability AI, and Amazon. Each model is accessible through a common API which implements a broad set of features to help build generative AI applications with security, privacy, and responsible AI in mind.

This guide will walk you through an example using the Amazon Bedrock JavaScript SDK in Supabase Edge Functions to generate images using the Amazon Titan Image Generator G1 model.

Setup

In your AWS console, navigate to Amazon Bedrock and under "Request model access", select the Amazon Titan Image Generator G1 model.
In your Supabase project, create a .env file in the supabase directory with the following contents:

txt

AWS_DEFAULT_REGION="<your_region>"
AWS_ACCESS_KEY_ID="<replace_your_own_credentials>"
AWS_SECRET_ACCESS_KEY="<replace_your_own_credentials>"
AWS_SESSION_TOKEN="<replace_your_own_credentials>"

# Mocked config files
AWS_SHARED_CREDENTIALS_FILE="./aws/credentials"
AWS_CONFIG_FILE="./aws/config"

Configure Storage

[locally] Run supabase start
Open Studio URL: locally | hosted
Navigate to Storage
Click "New bucket"
Create a new public bucket called "images"

Code

Create a new function in your project:

bash

supabase functions new amazon-bedrock

And add the code to the index.ts file:

// We need to mock the file system for the AWS SDK to work.
import { prepareVirtualFile } from 'https://deno.land/x/[email protected]/mod.ts'

import { BedrockRuntimeClient, InvokeModelCommand } from 'npm:@aws-sdk/client-bedrock-runtime'
import { createClient } from 'npm:@supabase/supabase-js'
import { decode } from 'npm:base64-arraybuffer'

console.log('Hello from Amazon Bedrock!')

Deno.serve(async (req) => {
  prepareVirtualFile('./aws/config')
  prepareVirtualFile('./aws/credentials')

  const client = new BedrockRuntimeClient({
    region: Deno.env.get('AWS_DEFAULT_REGION') ?? 'us-west-2',
    credentials: {
      accessKeyId: Deno.env.get('AWS_ACCESS_KEY_ID') ?? '',
      secretAccessKey: Deno.env.get('AWS_SECRET_ACCESS_KEY') ?? '',
      sessionToken: Deno.env.get('AWS_SESSION_TOKEN') ?? '',
    },
  })

  const { prompt, seed } = await req.json()
  console.log(prompt)
  const input = {
    contentType: 'application/json',
    accept: '*/*',
    modelId: 'amazon.titan-image-generator-v1',
    body: JSON.stringify({
      taskType: 'TEXT_IMAGE',
      textToImageParams: { text: prompt },
      imageGenerationConfig: {
        numberOfImages: 1,
        quality: 'standard',
        cfgScale: 8.0,
        height: 512,
        width: 512,
        seed: seed ?? 0,
      },
    }),
  }

  const command = new InvokeModelCommand(input)
  const response = await client.send(command)
  console.log(response)

  if (response.$metadata.httpStatusCode === 200) {
    const { body, $metadata } = response

    const textDecoder = new TextDecoder('utf-8')
    const jsonString = textDecoder.decode(body.buffer)
    const parsedData = JSON.parse(jsonString)
    console.log(parsedData)
    const image = parsedData.images[0]

    const supabaseClient = createClient(
      // Supabase API URL - env var exported by default.
      Deno.env.get('SUPABASE_URL')!,
      // Supabase API ANON KEY - env var exported by default.
      Deno.env.get('SUPABASE_SERVICE_ROLE_KEY')!
    )

    const { data: upload, error: uploadError } = await supabaseClient.storage
      .from('images')
      .upload(`${$metadata.requestId ?? ''}.png`, decode(image), {
        contentType: 'image/png',
        cacheControl: '3600',
        upsert: false,
      })
    if (!upload) {
      return Response.json(uploadError)
    }
    const { data } = supabaseClient.storage.from('images').getPublicUrl(upload.path!)
    return Response.json(data)
  }

  return Response.json(response)
})

Run the function locally

Run supabase start (see: https://supabase.com/docs/reference/cli/supabase-start)
Start with env: supabase functions serve --env-file supabase/.env
Make an HTTP request:

bash

  curl -i --location --request POST 'http://127.0.0.1:54321/functions/v1/amazon-bedrock' \
    --header 'Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZS1kZW1vIiwicm9sZSI6ImFub24iLCJleHAiOjE5ODM4MTI5OTZ9.CRXP1A7WOeoJeXxjNni43kdQwgnWNReilDMblYTn_I0' \
    --header 'Content-Type: application/json' \
    --data '{"prompt":"A beautiful picture of a bird"}'

Navigate back to your storage bucket. You might have to hit the refresh button to see the uploaded image.

Deploy to your hosted project

bash

supabase link
supabase functions deploy amazon-bedrock
supabase secrets set --env-file supabase/.env

You've now deployed a serverless function that uses AI to generate and upload images to your Supabase storage bucket.