GET /example/.. HTTP/1.1
Host:example.amazonaws.com
X-Amz-Date:20150830T123600Z
Authorization:AWS4-HMAC-SHA256 Credential=AKIDEXAMPLE/20150830/us-east-1/service/aws4_request, SignedHeaders=host;x-amz-date, Signature=eca7ead57bb5aa5c8e28007acd4ff04e1ff9a0ff3b237ec1554a184887ff9282