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Versions: 23
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Contents
module S3Relay
class UploadPresigner < S3Relay::Base
attr_reader :expires, :uuid
def initialize(options={})
@expires = (options[:expires] || 1.minute.from_now).utc.xmlschema
@uuid = SecureRandom.uuid
end
def form_data
fields.keys.inject({}) { |h,k| h[k.downcase.underscore] = fields[k]; h }
.merge(
"endpoint" => endpoint,
"policy" => encoded_policy,
"signature" => signature,
"uuid" => uuid
)
end
private
def fields
{
"AWSAccessKeyID" => access_key_id,
"x-amz-server-side-encryption" => "AES256",
"key" => "#{uuid}/${filename}",
"success_action_status" => "201",
"acl" => acl
}
end
def hmac
lambda { |data| OpenSSL::HMAC.digest(digest, secret_access_key, data) }
end
def policy_document
{
"expiration" => expires,
"conditions" => [
{ "bucket" => bucket },
{ "acl" => acl },
{ "x-amz-server-side-encryption" => "AES256" },
{ "success_action_status" => "201" },
["starts-with", "$content-type", ""],
["starts-with", "$content-disposition", ""],
["starts-with", "$key", "#{uuid}/"]
]
}
end
def encoded_policy
Base64.strict_encode64(policy_document.to_json)
end
def signature
Base64.strict_encode64(hmac[encoded_policy])
end
end
end
Version data entries
23 entries across 23 versions & 3 rubygems