Method: Bone::API::HTTP.canonical_sig_string

Defined in:
lib/bone/api.rb

.canonical_sig_string(host, meth, path, query, body = nil) ⇒ Object

Builds the canonical string for signing requests. This strips out all ‘&’, ‘?’, and ‘=’ from the query string to be signed. The parameters in the path passed in must already be sorted in case-insensitive alphabetical order and must not be url encoded.

Based on / stolen from: github.com/grempe/amazon-ec2/blob/master/lib/AWS.rb

See also: docs.amazonwebservices.com/AWSEC2/2009-04-04/DeveloperGuide/index.html?using-query-api.html



215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
 
# File 'lib/bone/api.rb', line 215

def canonical_sig_string host, meth, path, query, body=nil
  # Sort, and encode parameters into a canonical string.
  sorted_params = query.sort {|x,y| x[0].to_s <=> y[0].to_s }
  encoded_params = sorted_params.collect do |p|
    encoded = [Bone.uri_escape(p[0]), Bone.uri_escape(p[1])].join '='
    # Ensure spaces are encoded as '%20', not '+'
    encoded = encoded.gsub '+', '%20'
    # According to RFC3986 (the scheme for values expected 
    # by signing requests), '~' should not be encoded
    encoded = encoded.gsub '%7E', '~'
  end
  querystr = encoded_params.join '&'
  parts = [meth.to_s.downcase, canonical_host(host), path, querystr]
  parts << body unless body.to_s.empty?
  parts.join "\n"
end