Add support for Cloudflare R2 Buckets (#6701)

It is currently not possible to add a Cloudflare R2 Bucket as a Cloud
Storage source, since the Secret access key of R2 has a length of 64 but
the ui/serializer restricts the length to 44.

[This issue](#5512) addresses the
same problem when using STORJ but with a max length of `128`.

For me it would make the most sense to completely remove the max length,
but this PR currently only fixes the R2 compatibility by increasing the
max length to `64`.

changelog.d/20231013_104143_jonashiltl2003_secret_key_length.md

@@ -0,0 +1,4 @@
+### Changed
+
+- Increased max length of secret access key to 64
+  (<https://github.com/opencv/cvat/pull/6701>)

cvat-ui/src/components/create-cloud-storage-page/cloud-storage-form.tsx

@@ -352,7 +352,7 @@ export default function CreateCloudStorageForm(props: Props): JSX.Element {
                         {...internalCommonProps}
                     >
                         <Input.Password
-                            maxLength={44}
+                            maxLength={64}
                             visibilityToggle={secretKeyVisibility}
                             onChange={() => setSecretKeyVisibility(true)}
                             onFocus={() => onFocusCredentialsItem('secretKey', 'secret_key')}

cvat/apps/engine/models.py

@@ -1083,7 +1083,7 @@ class CloudStorage(models.Model):
     # AWS bucket name, Azure container name - 63, Google bucket name - 63 without dots and 222 with dots
     # https://cloud.google.com/storage/docs/naming-buckets#requirements
     # AWS access key id - 20, Oracle OCI access key id - 40
-    # AWS secret access key - 40, Oracle OCI secret key id - 44
+    # AWS secret access key - 40, Oracle OCI secret access key - 44, Cloudflare R2 secret access key - 64
     # AWS temporary session token - None
     # The size of the security token that AWS STS API operations return is not fixed.
     # We strongly recommend that you make no assumptions about the maximum size.

cvat/apps/engine/serializers.py

@@ -1720,7 +1720,7 @@ class CloudStorageWriteSerializer(serializers.ModelSerializer):
     owner = BasicUserSerializer(required=False)
     session_token = serializers.CharField(max_length=440, allow_blank=True, required=False)
     key = serializers.CharField(max_length=40, allow_blank=True, required=False)
-    secret_key = serializers.CharField(max_length=44, allow_blank=True, required=False)
+    secret_key = serializers.CharField(max_length=64, allow_blank=True, required=False)
     key_file = serializers.FileField(required=False)
     account_name = serializers.CharField(max_length=24, allow_blank=True, required=False)
     manifests = ManifestSerializer(many=True, default=[])

cvat/schema.yml

@@ -6632,7 +6632,7 @@ components:
           maxLength: 40
         secret_key:
           type: string
-          maxLength: 44
+          maxLength: 64
         connection_string:
           type: string
           maxLength: 440
@@ -8586,7 +8586,7 @@ components:
           maxLength: 40
         secret_key:
           type: string
-          maxLength: 44
+          maxLength: 64
         connection_string:
           type: string
           maxLength: 440