cvat-sdk: Fix creating tasks with non-local files

Forcing the `Content-Type` for the `upload_data` API call to
`multipart/form-data` does not work, because the current logic for
converting Python values to parts (`ApiClient._convert_body_to_post_params`)
does not encode them in a way that Django REST Framework can understand (it
JSON-encodes each part).

Fortunately, we don't actually need to do that, since when we create a task
with non-local files, we don't need to upload any files, and so we can just
post the original JSON, so do just that.

I couldn't add a test for the remote image case, because CVAT rejects all URLs
with non-public IP addressses. However, I did test this case manually.

Author: Roman Donchenko

CHANGELOG.md

@@ -34,6 +34,8 @@ non-ascii paths while adding files from "Connected file share" (issue #4428)
 - Invisible label item in label constructor when label color background is white,
  or close to it (<https://github.com/opencv/cvat/pull/5041>)
 - Fixed cvat-core ESlint problems (<https://github.com/opencv/cvat/pull/5027>)
+- Fixed task creation with non-local files via the SDK/CLI
+  (<https://github.com/opencv/cvat/issues/4962>)
 
 ### Security
 - TDB

cvat-sdk/cvat_sdk/core/proxies/tasks.py

@@ -77,9 +77,9 @@ def upload_data(
         if resource_type is ResourceType.LOCAL:
             pass  # handled later
         elif resource_type is ResourceType.REMOTE:
-            data = {f"remote_files[{i}]": f for i, f in enumerate(resources)}
+            data["remote_files"] = resources
         elif resource_type is ResourceType.SHARE:
-            data = {f"server_files[{i}]": f for i, f in enumerate(resources)}
+            data["server_files"] = resources
 
         data["image_quality"] = 70
         data.update(
@@ -104,7 +104,6 @@ def upload_data(
             self.api.create_data(
                 self.id,
                 data_request=models.DataRequest(**data),
-                _content_type="multipart/form-data",
             )
         elif resource_type == ResourceType.LOCAL:
             url = self._client.api_map.make_endpoint_url(

tests/python/sdk/test_tasks.py

@@ -126,6 +126,23 @@ def test_can_create_task_with_local_data(self):
         assert "100%" in pbar_out.getvalue().strip("\r").split("\r")[-1]
         assert self.stdout.getvalue() == ""
 
+    def test_can_create_task_with_remote_data(self):
+        task = self.client.tasks.create_from_data(
+            spec={
+                "name": "test_task",
+                "labels": [{"name": "car"}, {"name": "person"}],
+            },
+            resource_type=ResourceType.SHARE,
+            resources=["image_case_107_2.png", "image_case_107_1.png"],
+            # make sure string fields are transferred correctly;
+            # see https://github.com/opencv/cvat/issues/4962
+            data_params={"sorting_method": "lexicographical"},
+        )
+
+        assert task.size == 2
+        assert task.get_frames_info()[0].name == "image_case_107_1.png"
+        assert self.stdout.getvalue() == ""
+
     def test_cant_create_task_with_no_data(self):
         pbar_out = io.StringIO()
         pbar = make_pbar(file=pbar_out)

tests/python/shared/fixtures/init.py

@@ -30,6 +30,7 @@
     osp.join(CVAT_ROOT_DIR, dc_file)
     for dc_file in (
         "docker-compose.dev.yml",
+        "tests/docker-compose.file_share.yml",
         "tests/docker-compose.minio.yml",
         "tests/docker-compose.webhook.yml",
     )