Class: RightScale::CloudApi::AWS::RequestSigner

Inherits:
CloudApi::Routine
  • Object
show all
Defined in:
lib/cloud/aws/base/routines/request_signer.rb

Overview

Request signer for AWS services.

Defined Under Namespace

Classes: Error

Constant Summary collapse

MAX_GET_REQUEST_PATH_LENGTH =

Use POST verb if GET’s path is getting too big.

2000

Instance Method Summary collapse

Instance Method Details

#process ⇒ void

This method returns an undefined value.

Authenticates an AWS request

Examples:

no example



45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
 
# File 'lib/cloud/aws/base/routines/request_signer.rb', line 45

def process
  # Make sure all the required params are set
  @data[:request][:params]['AWSAccessKeyId'] = @data[:credentials][:aws_access_key_id]
  @data[:request][:params]['Version']      ||= @data[:options][:api_version]
  # Compile a final request path
  @data[:request][:path] = Utils::join_urn(@data[:connection][:uri].path, @data[:request][:relative_path])
  # Sign the request
  sign_proc = Proc::new do |data|
    Utils::AWS::sign_v2_signature( data[:credentials][:aws_secret_access_key],
                                   data[:request][:params] || {},
                                   data[:request][:verb],
                                   data[:connection][:uri].host,
                                   data[:request][:path] )
  end
  signed_path = sign_proc.call(@data)
  # Rebuild the request as POST if its path is too long
  if signed_path.size > MAX_GET_REQUEST_PATH_LENGTH && @data[:request][:verb] == :get
    @data[:request][:verb] = :post
    signed_path = sign_proc.call(@data)
  end
  # Set new path or body and content-type
  case @data[:request][:verb]
  when :get
    @data[:request][:path] << "?#{signed_path}"
  when :post
    @data[:request][:body] = signed_path
    @data[:request][:headers]['content-type'] = 'application/x-www-form-urlencoded; charset=utf-8'
  else
    fail Error::new("Unsupported HTTP verb: #{@data[:request][:verb]}")
  end
end