module Fog::AWS::Storage::PostObjectHiddenFields

Public Instance Methods

post_object_hidden_fields(options = {}) click to toggle source

Get a hash of hidden fields for form uploading to S3, in the form {:field_name => :field_value} Form should look like: <form action=“#{bucket_name}.s3.amazonaws.com/” method=“post” enctype=“multipart/form-data”> These hidden fields should then appear, followed by a field named 'file' which is either a textarea or file input.

@param options Hash: @option options acl [String] access control list, in ['private', 'public-read', 'public-read-write', 'authenticated-read', 'bucket-owner-read', 'bucket-owner-full-control'] @option options Cache-Control [String] same as REST header @option options Content-Type [String] same as REST header @option options Content-Disposition [String] same as REST header @option options Content-Encoding [String] same as REST header @option options Expires same as REST header @option options key key for object, set to '${filename}' to use filename provided by user @option options policy security policy for upload @option options success_action_redirect url to redirct to upon success @option options success_action_status status code to return on success, in [200, 201, 204] @option options x-amz-security token devpay security token @option options x-amz-meta… meta data tags

@see docs.amazonwebservices.com/AmazonS3/latest/dev/HTTPPOSTForms.html

# File lib/fog/aws/requests/storage/post_object_hidden_fields.rb, line 25
def post_object_hidden_fields(options = {})
  options = options.dup
  if policy = options['policy']
    date = Fog::Time.now
    credential = "#{@aws_access_key_id}/#{@signer.credential_scope(date)}"
    extra_conditions = [
      {'x-amz-date' => date.to_iso8601_basic},
      {'x-amz-credential' => credential},
      {'x-amz-algorithm' => Fog::AWS::SignatureV4::ALGORITHM}
    ]

    extra_conditions << {'x-amz-security-token' => @aws_session_token } if @aws_session_token

    policy_with_auth_fields = policy.merge('conditions' => policy['conditions'] + extra_conditions)

    options['policy'] = Base64.encode64(Fog::JSON.encode(policy_with_auth_fields)).gsub("\n", "")
    options['X-Amz-Credential'] = credential
    options['X-Amz-Date'] = date.to_iso8601_basic
    options['X-Amz-Algorithm'] = Fog::AWS::SignatureV4::ALGORITHM
    if @aws_session_token
      options['X-Amz-Security-Token'] = @aws_session_token
    end
    options['X-Amz-Signature'] = @signer.derived_hmac(date).sign(options['policy']).unpack('H*').first
  end
  options
end