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AWS Lambda Chromium Screenshot API

This project uses AWS Lambda with a Chromium layer to capture screenshots of a URL. Follow the steps below to set it up and deploy the code.

Prerequisites

  • AWS CLI is installed and configured
  • S3 bucket exists for uploading Chromium layer
  • Necessary IAM permissions to create layers and upload files to S3

Setup Instructions

Step 1: Set up Chromium Lambda Layer

Run the script to download or build the Chromium binary, upload it to S3, and create the Lambda layer.

chmod +x scripts/setup-chromium-layer.sh
./scripts/setup-chromium-layer.sh create

After successful execution, the ARN of the layer will be saved to chromium-layer-arn.txt. Use this ARN in the next step.

Step 2: Update Serverless Configuration

Add the ARN from chromium-layer-arn.txt into your serverless.yml under the functions.server.layers section.

functions:
  server:
    handler: src/index.handler
    layers:
      - arn:aws:lambda:<region>:<account-id>:layer:chromium:<version>
    events:
      - http:
          path: /
          method: ANY
          cors: true
      - http:
          path: /{proxy+}
          method: ANY
          cors: true

Step 3: Deploy the Server

Deploy the code to AWS using the following command:

pnpm run deploy

Step 4: Test the API

Call the /screenshot API to capture a screenshot of the provided URL and return it in an HTML response.

Example API call:

GET /screenshot?url=https://example.com

Note

To remove the AWS Lambda layer, use the script:

./scripts/setup-chromium-layer.sh remove

You need to manually remove the browser file from the S3 bucket after deletion.