Class: Cosmos::S3Utilities

Inherits:
Object show all
Defined in:
lib/cosmos/utilities/s3.rb

Class Method Summary collapse

Class Method Details

.ensure_public_bucket(bucket_name) ⇒ Object 



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# File 'lib/cosmos/utilities/s3.rb', line 144

def self.ensure_public_bucket(bucket_name)
  rubys3_client = Aws::S3::Client.new
  begin
    rubys3_client.head_bucket(bucket: bucket_name)
  rescue Aws::S3::Errors::NotFound
    rubys3_client.create_bucket(bucket: bucket_name)

    policy = <<~EOL
      {
        "Version": "2012-10-17",
        "Statement": [
          {
            "Action": [
              "s3:GetBucketLocation",
              "s3:ListBucket"
            ],
            "Effect": "Allow",
            "Principal": {
              "AWS": [
                "*"
              ]
            },
            "Resource": [
              "arn:aws:s3:::#{bucket_name}"
            ],
            "Sid": ""
          },
          {
            "Action": [
              "s3:GetObject"
            ],
            "Effect": "Allow",
            "Principal": {
              "AWS": [
                "*"
              ]
            },
            "Resource": [
              "arn:aws:s3:::#{bucket_name}/*"
            ],
            "Sid": ""
          }
        ]
      }
    EOL

    rubys3_client.put_bucket_policy({ bucket: bucket_name, policy: policy })
  end
end

.get_cache_control(filename) ⇒ Object 



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# File 'lib/cosmos/utilities/s3.rb', line 194

def self.get_cache_control(filename)
  # Allow caching for files that have a filename versioning strategy
  has_version_number = /(-|_|\.)\d+(-|_|\.)\d+(-|_|\.)\d+\./.match(@filename)
  has_content_hash = /\.[a-f0-9]{20}\./.match(@filename)
  return nil if has_version_number or has_content_hash
  return 'no-cache'
end

.get_total_size_and_oldest_list(bucket, prefix, max_list_length = 10000) ⇒ Object 



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# File 'lib/cosmos/utilities/s3.rb', line 86

def self.get_total_size_and_oldest_list(bucket, prefix, max_list_length = 10000)
  rubys3_client = Aws::S3::Client.new
  oldest_list = []
  total_size = 0

  # Return nothing if bucket doesn't exist (it won't at the very beginning)
  begin
    rubys3_client.head_bucket(bucket: bucket)
  rescue Aws::S3::Errors::NotFound
    return total_size, oldest_list
  end

  # Get List of Files from S3
  token = nil
  while true
    resp = rubys3_client.list_objects_v2({
                                           bucket: bucket,
                                           max_keys: 1000,
                                           prefix: prefix,
                                           continuation_token: token
                                         })
    resp.contents.each do |item|
      total_size += item.size
    end
    oldest_list.concat(resp.contents)
    oldest_list.sort! { |a, b| File.basename(a.key) <=> File.basename(b.key) }
    oldest_list = oldest_list[0..(max_list_length - 1)]
    break unless resp.is_truncated

    token = resp.next_continuation_token
  end
  return total_size, oldest_list
end

.list_files_before_time(bucket, prefix, time) ⇒ Object 



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# File 'lib/cosmos/utilities/s3.rb', line 25

def self.list_files_before_time(bucket, prefix, time)
  rubys3_client = Aws::S3::Client.new
  oldest_list = []
  total_size = 0

  # Return nothing if bucket doesn't exist (it won't at the very beginning)
  begin
    rubys3_client.head_bucket(bucket: bucket)
  rescue Aws::S3::Errors::NotFound
    return total_size, oldest_list
  end

  # Get List of Packet Names - Assumes prefix gets us to a folder of packet names
  token = nil
  folder_list = []
  while true
    resp = rubys3_client.list_objects_v2({
      bucket: bucket,
      max_keys: 1000,
      prefix: prefix,
      delimiter: '/',
      continuation_token: token
    })
    
    resp.common_prefixes.each do |item|
      folder_list << item.prefix
    end
    break unless resp.is_truncated
    token = resp.next_continuation_token
  end

  # Go through each folder and keep files that end before time
  folder_list.each do |folder|
    token = nil
    next_folder = false
    while true
      resp = rubys3_client.list_objects_v2({
                                            bucket: bucket,
                                            max_keys: 1000,
                                            prefix: folder,
                                            continuation_token: token
                                          })
      resp.contents.each do |item|
        t = item.key.split('__')[1]
        file_end_time = Time.utc(t[0..3], t[4..5], t[6..7], t[8..9], t[10..11], t[12..13])
        if file_end_time < time
          oldest_list << item
          total_size += item.size
        else
          next_folder = true
          break
        end
      end
      break if !resp.is_truncated or next_folder

      token = resp.next_continuation_token
    end
  end
  return total_size, oldest_list
end

.move_log_file_to_s3(filename, s3_key, metadata: {}) ⇒ Object 



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# File 'lib/cosmos/utilities/s3.rb', line 120

def self.move_log_file_to_s3(filename, s3_key, metadata: {})
  Thread.new do
    rubys3_client = Aws::S3::Client.new

    # Ensure logs bucket exists
    begin
      rubys3_client.head_bucket(bucket: 'logs')
    rescue Aws::S3::Errors::NotFound
      rubys3_client.create_bucket(bucket: 'logs')
    end

    # Write to S3 Bucket
    File.open(filename, 'rb') do |read_file|
      rubys3_client.put_object(bucket: 'logs', key: s3_key, body: read_file, metadata: metadata)
    end
    Logger.debug "logs/#{s3_key} written to S3"
    ReducerModel.add_file(s3_key) # Record the new file for data reduction

    File.delete(filename)
  rescue => err
    Logger.error("Error saving log file to bucket: #{filename}\n#{err.formatted}")
  end
end