С помощью nginx/angie и встроенного модуля perl можно проксировать запросы
напрямую к S3. Ниже приведён пример для реализации S3 от DigitalOcean (Spaces).
Для Amazon AWS S3 пример тоже подходит. Для авторизации доступа можно
использовать пример совместно с модулем secure_link.


   http {
	...
	perl_set $date
	'sub {
		use POSIX qw(strftime);
		return strftime("%Y%m%d", gmtime());
	}';

	perl_set $datetime
	'sub {
		use POSIX qw(strftime);
		return strftime("%Y%m%dT%H%M%SZ", gmtime());
	}';

	### yum install perl-Digest-SHA
	perl_set $signed_digest
	'sub {
		use Digest::SHA qw(hmac_sha256 hmac_sha256_hex sha256_hex);

		my $r = shift;

		my $data_key = hmac_sha256($r->variable(date), "AWS4" . $r->variable(aws_access_secret));
		my $region_key = hmac_sha256($r->variable(aws_region), $data_key);
		my $service_key = hmac_sha256($r->variable(aws_service), $region_key);
		my $signing_key = hmac_sha256("aws4_request", $service_key);

		my $hash = sha256_hex($r->variable(canonical_request));
		my $str =
			"AWS4-HMAC-SHA256" . "\n" .
			$r->variable(datetime) . "\n" .
			$r->variable(date) . "/" .
			$r->variable(aws_region) . "/" .
			$r->variable(aws_service) .
			"/aws4_request" . "\n" .
			$hash;

		return hmac_sha256_hex($str, $signing_key);
	}';
	...
	server {
		...
		location @s3 {
			set $provider 'digitaloceanspaces.com';
			set $bucket 'my-bycket-name';
			set $aws_access_key 'my-key';
			set $aws_access_secret 'my-secret';
			set $aws_region 'ams3';
			set $aws_service 's3';

			### perl -e 'use Digest::SHA qw(sha256_hex); my $s = sha256_hex(""); print $s, "\n"'
			set $empty_hash 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855';

   set $canonical_request 'GET\n$uri\n\nhost:$bucket.$aws_region.$provider\nx-amz-content-sha256:$empty_hash\nx-amz-date:$datetime\n\nhost;x-amz-content-sha256;x-amz-date\n$empty_hash';

			proxy_buffering off;
			proxy_buffer_size 1m;
			proxy_buffers 64 64k;

			proxy_connect_timeout 11s;
			proxy_send_timeout 14s;
			proxy_read_timeout 17s;

   proxy_next_upstream error timeout invalid_header http_500 http_502 http_503
http_504 http_403 http_404;
			proxy_next_upstream_timeout 30s;
			proxy_next_upstream_tries 3;

			proxy_hide_header Strict-Transport-Security;
			proxy_hide_header x-amz-request-id;
			proxy_hide_header x-amz-meta-s3cmd-attrs;

			proxy_http_version 1.1;

			proxy_set_header Host '$bucket.$aws_region.$provider';
			proxy_set_header x-amz-date '$datetime';
   proxy_set_header Authorization 'AWS4-HMAC-SHA256 Credential=$aws_access_key/$date/$aws_region/$aws_service/aws4_request,SignedHeaders=host;x-amz-content-sha256;x-amz-date,Signature=$signed_digest';
			proxy_set_header x-amz-content-sha256 '$empty_hash';
			proxy_set_header Range '$http_range';

			proxy_pass_request_headers off;
			proxy_pass_request_body off;

			proxy_pass https://$bucket.$aws_region.$provider;
		}
		...
	}
	...
   }