[WEB-4316] chore: new endpoints to download an asset (#7207)

* chore: new endpoints to download an asset

* chore: add exception handling

apiserver/plane/app/urls/asset.py

@@ -13,6 +13,8 @@ from plane.app.views import (
     ProjectAssetEndpoint,
     ProjectBulkAssetEndpoint,
     AssetCheckEndpoint,
+    WorkspaceAssetDownloadEndpoint,
+    ProjectAssetDownloadEndpoint,
 )
 
 
@@ -89,4 +91,14 @@ urlpatterns = [
         AssetCheckEndpoint.as_view(),
         name="asset-check",
     ),
+    path(
+        "assets/v2/workspaces/<str:slug>/download/<uuid:asset_id>/",
+        WorkspaceAssetDownloadEndpoint.as_view(),
+        name="workspace-asset-download",
+    ),
+    path(
+        "assets/v2/workspaces/<str:slug>/projects/<uuid:project_id>/download/<uuid:asset_id>/",
+        ProjectAssetDownloadEndpoint.as_view(),
+        name="project-asset-download",
+    ),
 ]

apiserver/plane/app/views/__init__.py

@@ -107,6 +107,8 @@ from .asset.v2 import (
     ProjectAssetEndpoint,
     ProjectBulkAssetEndpoint,
     AssetCheckEndpoint,
+    WorkspaceAssetDownloadEndpoint,
+    ProjectAssetDownloadEndpoint,
 )
 from .issue.base import (
     IssueListEndpoint,

apiserver/plane/app/views/asset/v2.py

@@ -718,3 +718,56 @@ class AssetCheckEndpoint(BaseAPIView):
             id=asset_id, workspace__slug=slug, deleted_at__isnull=True
         ).exists()
         return Response({"exists": asset}, status=status.HTTP_200_OK)
+
+
+class WorkspaceAssetDownloadEndpoint(BaseAPIView):
+    """Endpoint to generate a download link for an asset with content-disposition=attachment."""
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST], level="WORKSPACE")
+    def get(self, request, slug, asset_id):
+        try:
+            asset = FileAsset.objects.get(
+                id=asset_id,
+                workspace__slug=slug,
+                is_uploaded=True,
+            )
+        except FileAsset.DoesNotExist:
+            return Response(
+                {"error": "The requested asset could not be found."},
+                status=status.HTTP_404_NOT_FOUND,
+            )
+
+        storage = S3Storage(request=request)
+        signed_url = storage.generate_presigned_url(
+            object_name=asset.asset.name,
+            disposition=f"attachment; filename={asset.asset.name}",
+        )
+
+        return HttpResponseRedirect(signed_url)
+
+
+class ProjectAssetDownloadEndpoint(BaseAPIView):
+    """Endpoint to generate a download link for an asset with content-disposition=attachment."""
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST], level="PROJECT")
+    def get(self, request, slug, project_id, asset_id):
+        try:
+            asset = FileAsset.objects.get(
+                id=asset_id,
+                workspace__slug=slug,
+                project_id=project_id,
+                is_uploaded=True,
+            )
+        except FileAsset.DoesNotExist:
+            return Response(
+                {"error": "The requested asset could not be found."},
+                status=status.HTTP_404_NOT_FOUND,
+            )
+
+        storage = S3Storage(request=request)
+        signed_url = storage.generate_presigned_url(
+            object_name=asset.asset.name,
+            disposition=f"attachment; filename={asset.asset.name}",
+        )
+
+        return HttpResponseRedirect(signed_url)