class Presigner

Constants

DEFAULT_DURATION
VERSION

Attributes

base[R]

bucket[R]

duration[R]

key[R]

region[R]

Public Class Methods

new(options) click to toggle source

# File lib/presigner.rb, line 9
def initialize(options)
  @bucket = options[:bucket]
  @key = options[:key]
  @duration = options[:duration] || DEFAULT_DURATION
  @region = options[:region] || "us-east-1"
  @base = Time.now.to_i
end

Public Instance Methods

calc_duration() click to toggle source

# File lib/presigner.rb, line 46
def calc_duration
  duration
end

generate() click to toggle source

# File lib/presigner.rb, line 19
def generate

  s3 = AWS::S3.new(region: region)
  # check if specified bucket and key exist.
  begin
    target_obj = s3.buckets[bucket].objects[key]
    if !target_obj.exists?
      $stderr.puts "Specified bucket or key does not exist."
      exit 1
    end
  rescue AWS::S3::Errors::Forbidden
    $stderr.puts "Access to the S3 object is denied. Credential or target name might be wrong"
    exit 1
  end

  if !target_obj.exists?
    $stderr.puts "Specified bucket or key does not exist."
    exit 1
  end

  presigner = AWS::S3::PresignV4.new(target_obj)
  expires = calc_duration

  url = presigner.presign(:get, expires: base + duration, secure: true)
  url
end