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Optimized creation of S3 presigned_url in ruby
AWS_SIG4_SIGNER = Aws::Sigv4::Signer.new(
service: 's3',
region: AWS_CLIENT.config.region,
credentials_provider: SOME_AWS_CLIENT.config.credentials,
unsigned_headers: Aws::S3::Presigner::BLACKLISTED_HEADERS,
uri_escape_path: false
)
def naive_with_uri_escape_escaping(shrine_file)
# because URI.escape does NOT escape `/`, we don't need to split it,
# which is what actually saves us the time.
path = URI.escape(shrine_file.id)
"https://#{["#{shrine_file.storage.bucket.name}.s3.amazonaws.com", *shrine_file.storage.prefix, shrine_file.id].join('/')}"
end
# not yet handling custom query params eg for content-disposition
def direct_aws_sig4_signer(url)
AWS_SIG4_SIGNER.presign_url(
http_method: "GET",
url: url,
headers: {},
body_digest: 'UNSIGNED-PAYLOAD',
expires_in: 900, # seconds
time: nil
).to_s
end
direct_aws_sig4_signer( naive_with_uri_escape_escaping( shrine_uploaded_file ) )
# => presigned S3 url
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