Test Lambda function operation

  1. Navigate to S3 bucket: book-image-stores

    • Click Upload S3Bucket

  2. Click Add files S3Bucket

  3. Select image to upload, then click Upload S3Bucket

  4. Wait for the Lambda function running, then check whether the image has been deleted S3Bucket

  5. Navigate to S3 bucket: book-image-resize-stores

    • Click to image file S3Bucket

  6. Click Object URL to download image S3Bucket

  7. But error occurs - Access Denied. S3Bucket

  8. To download image, need add policy for bucket to allow public access.

    • Back to bucket, select Permission
    • Click Edit in Bucket policy S3Bucket
    • Copy the below json data into Policy 
      {
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "PublicReadGetObject",
            "Effect": "Allow",
            "Principal": "*",
            "Action": "s3:GetObject",
            "Resource": "arn:aws:s3:::book-image-resize-stores/*"
        }
    ]
}
    • Click Save changes S3Bucket

  9. Then, repeat steps 6 and 7 to download image to local to download an image to your device to compare it with the one you’ve already uploaded. So Lambda resizes function is working properly.