S3URISigner
implements AWS SigV4 for S3 Source to avoid a dependency on the aws-sdk-* gems More on AWS SigV4: docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-authenticating-requests.html
Signs S3 URI using query-params according to the reference: docs.aws.amazon.com/AmazonS3/latest/API/sigv4-query-string-auth.html
# File rubygems/s3_uri_signer.rb, line 37 def sign(expiration = 86400) s3_config = fetch_s3_config current_time = Time.now.utc date_time = current_time.strftime("%Y%m%dT%H%m%SZ") date = date_time[0,8] credential_info = "#{date}/#{s3_config.region}/s3/aws4_request" canonical_host = "#{uri.host}.s3.#{s3_config.region}.amazonaws.com" query_params = generate_canonical_query_params(s3_config, date_time, credential_info, expiration) canonical_request = generate_canonical_request(canonical_host, query_params) string_to_sign = generate_string_to_sign(date_time, credential_info, canonical_request) signature = generate_signature(s3_config, date, string_to_sign) URI.parse("https://#{canonical_host}#{uri.path}?#{query_params}&X-Amz-Signature=#{signature}") end