Add endpoint for presigned uploads

templates/openapi/openapi.yaml

@@ -589,6 +589,32 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/CreatePresignedUrlResponse'
+
+  /api/buckets/{bucketName}/objects/{objectKey}/presigned-upload:
+    parameters:
+      - $ref: '#/components/parameters/BucketName'
+      - $ref: '#/components/parameters/ObjectKey'
+    post:
+      operationId: createPresignedUpload
+      tags:
+        - Management - Presigned URLs
+      summary: Create presigned upload URL
+      description: Creates an empty object and returns a presigned URL for uploading content
+      security:
+        - ApiKey: []
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/CreatePresignedUploadRequest'
+      responses:
+        '201':
+          description: Presigned URL created
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/CreatePresignedUrlResponse'
 components:
   schemas:
     CreatePresignedUrlResponse:
@@ -597,6 +623,24 @@ components:
         url:
           type: string
           example: /my-bucket/file.txt?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIOSFODNN7EXAMPLE%2F20230115%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20230115T103000Z&X-Amz-Expires=3600&X-Amz-SignedHeaders=host&X-Amz-Signature=abc123&hash=def456
+    CreatePresignedUploadRequest:
+      type: object
+      required:
+        - access_key
+      properties:
+        access_key:
+          type: string
+          example: "AKIAIOSFODNN7EXAMPLE"
+        expires_in:
+          type: integer
+          minimum: 1
+          maximum: 604800
+          default: 3600
+          example: 3600
+        content_type:
+          type: string
+          default: "application/octet-stream"
+          example: "image/jpeg"
     ObjectSummary:
       type: object
       properties: