Class: OpenC3::AwsBucket

Inherits:
Bucket show all
Defined in:
lib/openc3/utilities/aws_bucket.rb

Direct Known Subclasses

LocalBucket

Constant Summary collapse

CREATE_CHECK_COUNT =

10 seconds

100

Instance Method Summary collapse

Methods inherited from Bucket

getClient

Constructor Details

#initialize ⇒ AwsBucket

Returns a new instance of AwsBucket.



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# File 'lib/openc3/utilities/aws_bucket.rb', line 28

def initialize
  @client = Aws::S3::Client.new
end

Instance Method Details

#check_object(bucket:, key:) ⇒ Object 



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# File 'lib/openc3/utilities/aws_bucket.rb', line 198

def check_object(bucket:, key:)
  @client.wait_until(:object_exists,
    {
      bucket: bucket,
      key: key
    },
    {
      max_attempts: 30,
      delay: 0.1, # seconds
    }
  )
  true
rescue Aws::Waiters::Errors::TooManyAttemptsError
  false
end

#create(bucket) ⇒ Object 



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# File 'lib/openc3/utilities/aws_bucket.rb', line 32

def create(bucket)
  unless exist?(bucket)
    @client.create_bucket({ bucket: bucket })
    count = 0
    until exist?(bucket) or count > CREATE_CHECK_COUNT
      sleep(0.1)
      count += 1
    end
  end
  bucket
end

#delete(bucket) ⇒ Object 



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# File 'lib/openc3/utilities/aws_bucket.rb', line 93

def delete(bucket)
  if exist?(bucket)
    @client.delete_bucket({ bucket: bucket })
  end
end

#delete_object(bucket:, key:) ⇒ Object 



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# File 'lib/openc3/utilities/aws_bucket.rb', line 214

def delete_object(bucket:, key:)
  @client.delete_object(bucket: bucket, key: key)
end

#delete_objects(bucket:, keys:) ⇒ Object 



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# File 'lib/openc3/utilities/aws_bucket.rb', line 218

def delete_objects(bucket:, keys:)
  @client.delete_objects(bucket: bucket, delete: { objects: keys.map {|key| { key: key } } })
end

#ensure_public(bucket) ⇒ Object 



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# File 'lib/openc3/utilities/aws_bucket.rb', line 44

def ensure_public(bucket)
  policy = <<~EOL
  {
    "Version": "2012-10-17",
    "Statement": [
      {
        "Action": [
          "s3:GetBucketLocation",
          "s3:ListBucket"
        ],
        "Effect": "Allow",
        "Principal": {
          "AWS": [
            "*"
          ]
        },
        "Resource": [
          "arn:aws:s3:::#{bucket}"
        ],
        "Sid": ""
      },
      {
        "Action": [
          "s3:GetObject"
        ],
        "Effect": "Allow",
        "Principal": {
          "AWS": [
            "*"
          ]
        },
        "Resource": [
          "arn:aws:s3:::#{bucket}/*"
        ],
        "Sid": ""
      }
    ]
  }
  EOL
  @client.put_bucket_policy({ bucket: bucket, policy: policy })
end

#exist?(bucket) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/openc3/utilities/aws_bucket.rb', line 86

def exist?(bucket)
  @client.head_bucket({ bucket: bucket })
  true
rescue Aws::S3::Errors::NotFound
  false
end

#get_object(bucket:, key:, path: nil) ⇒ Object 



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# File 'lib/openc3/utilities/aws_bucket.rb', line 99

def get_object(bucket:, key:, path: nil)
  if path
    @client.get_object(bucket: bucket, key: key, response_target: path)
  else
    @client.get_object(bucket: bucket, key: key)
  end
# If the key is not found return nil
rescue Aws::S3::Errors::NoSuchKey
  nil
end

#head_object(bucket:, key:) ⇒ Object

get metadata for a specific object



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# File 'lib/openc3/utilities/aws_bucket.rb', line 182

def head_object(bucket:, key:)
  @client.head_object({
    bucket: bucket,
    key: key
  })
rescue Aws::S3::Errors::NotFound
  raise NotFound, "Object '#{bucket}/#{key}' does not exist."
end

#list_files(bucket:, path:, only_directories: false, metadata: false) ⇒ Object

Lists the files under a specified path



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# File 'lib/openc3/utilities/aws_bucket.rb', line 132

def list_files(bucket:, path:, only_directories: false, metadata: false)
  # Trailing slash is important in AWS S3 when listing files
  # See https://docs.aws.amazon.com/sdk-for-ruby/v3/api/Aws/S3/Types/ListObjectsV2Output.html#common_prefixes-instance_method
  if path[-1] != '/'
    path += '/'
  end
  # If we're searching for the root then kill the path or AWS will return nothing
  path = nil if path == '/'

  token = nil
  result = []
  dirs = []
  files = []
  while true
    resp = @client.list_objects_v2({
      bucket: bucket,
      max_keys: 1000,
      prefix: path,
      delimiter: '/',
      continuation_token: token
    })
    resp.common_prefixes.each do |item|
      # If path was DEFAULT/targets_modified/ then the
      # results look like DEFAULT/targets_modified/INST/
      dirs << item.prefix.split('/')[-1]
    end
    if only_directories
      result = dirs
    else
      resp.contents.each do |aws_item|
        item = {}
        item['name'] = aws_item.key.split('/')[-1]
        item['modified'] = aws_item.last_modified
        item['size'] = aws_item.size
        if metadata
          item['metadata'] = head_object(bucket: bucket, key: aws_item.key)
        end
        files << item
      end
      result = [dirs, files]
    end
    break unless resp.is_truncated
    token = resp.next_continuation_token
  end
  result
rescue Aws::S3::Errors::NoSuchBucket
  raise NotFound, "Bucket '#{bucket}' does not exist."
end

#list_objects(bucket:, prefix: nil, max_request: 1000, max_total: 100_000) ⇒ Object 



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# File 'lib/openc3/utilities/aws_bucket.rb', line 110

def list_objects(bucket:, prefix: nil, max_request: 1000, max_total: 100_000)
  token = nil
  result = []
  while true
    resp = @client.list_objects_v2({
      bucket: bucket,
      max_keys: max_request,
      prefix: prefix,
      continuation_token: token
    })
    result.concat(resp.contents)
    break if result.length >= max_total
    break unless resp.is_truncated
    token = resp.next_continuation_token
  end
  # Array of objects with key and size methods
  result
rescue Aws::S3::Errors::NoSuchBucket
  raise NotFound, "Bucket '#{bucket}' does not exist."
end

#presigned_request(bucket:, key:, method:, internal: true) ⇒ Object 



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# File 'lib/openc3/utilities/aws_bucket.rb', line 222

def presigned_request(bucket:, key:, method:, internal: true)
  s3_presigner = Aws::S3::Presigner.new

  if internal
    prefix = '/'
  else
    prefix = '/files/'
  end

  url, headers = s3_presigner.presigned_request(method, bucket: bucket, key: key)
  return {
    :url => prefix + url.split('/')[3..-1].join('/'),
    :headers => headers,
    :method => method.to_s.split('_')[0],
  }
end

#put_object(bucket:, key:, body:, content_type: nil, cache_control: nil, metadata: nil) ⇒ Object

put_object fires off the request to store but does not confirm



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# File 'lib/openc3/utilities/aws_bucket.rb', line 192

def put_object(bucket:, key:, body:, content_type: nil, cache_control: nil, metadata: nil)
  @client.put_object(bucket: bucket, key: key, body: body,
    content_type: content_type, cache_control: cache_control, metadata: metadata)
end