🐛 Ensure chunk file download (#206)

clients/python/requirements/e2e-test.txt

@@ -5,6 +5,7 @@ ipykernel
 ipython
 jinja2
 matplotlib
+memory_profiler
 packaging
 pandas
 papermill

clients/python/setup.py

@@ -30,6 +30,7 @@
     "tenacity",
     "tqdm>=4.48.0",
     f"osparc_client=={VERSION}",
+    "aiofiles",
 ]
 
 SETUP = dict(

clients/python/src/osparc/_api_files_api.py

@@ -4,9 +4,6 @@
 import json
 import logging
 import math
-import random
-import shutil
-import string
 from pathlib import Path
 from typing import Any, Iterator, List, Optional, Tuple, Union
 
@@ -28,6 +25,10 @@
     FileUploadData,
     UploadedPart,
 )
+from urllib.parse import urljoin
+import aiofiles
+from tempfile import NamedTemporaryFile
+import shutil
 from ._utils import (
     DEFAULT_TIMEOUT_SECONDS,
     PaginationGenerator,
@@ -65,25 +66,57 @@ def __getattr__(self, name: str) -> Any:
         return super().__getattribute__(name)
 
     def download_file(
-        self, file_id: str, *, destination_folder: Optional[Path] = None, **kwargs
+        self,
+        file_id: str,
+        *,
+        destination_folder: Optional[Path] = None,
+        timeout_seconds: int = DEFAULT_TIMEOUT_SECONDS,
+        **kwargs,
+    ) -> str:
+        return asyncio.run(
+            self.download_file_async(
+                file_id=file_id,
+                destination_folder=destination_folder,
+                timeout_seconds=timeout_seconds,
+                **kwargs,
+            )
+        )
+
+    async def download_file_async(
+        self,
+        file_id: str,
+        *,
+        destination_folder: Optional[Path] = None,
+        timeout_seconds: int = DEFAULT_TIMEOUT_SECONDS,
+        **kwargs,
     ) -> str:
         if destination_folder is not None and not destination_folder.is_dir():
             raise RuntimeError(
                 f"destination_folder: {destination_folder} must be a directory"
             )
-        downloaded_file: Path = Path(super().download_file(file_id, **kwargs))
-        if destination_folder is not None:
-            dest_file: Path = destination_folder / downloaded_file.name
-            while dest_file.is_file():
-                new_name = (
-                    downloaded_file.stem
-                    + "".join(random.choices(string.ascii_letters, k=8))
-                    + downloaded_file.suffix
+        async with aiofiles.tempfile.NamedTemporaryFile(
+            mode="wb",
+            delete=False,
+        ) as downloaded_file:
+            async with AsyncHttpClient(
+                configuration=self.api_client.configuration, timeout=timeout_seconds
+            ) as session:
+                url = urljoin(
+                    self.api_client.configuration.host, f"/v0/files/{file_id}/content"
                 )
-                dest_file = destination_folder / new_name
-            shutil.move(downloaded_file, dest_file)
-            downloaded_file = dest_file
-        return str(downloaded_file.resolve())
+                async for response in await session.stream(
+                    "GET", url=url, auth=self._auth, follow_redirects=True
+                ):
+                    response.raise_for_status()
+                    async for chunk in response.aiter_bytes():
+                        await downloaded_file.write(chunk)
+        dest_file = f"{downloaded_file.name}"
+        if destination_folder is not None:
+            dest_file = NamedTemporaryFile(dir=destination_folder, delete=False).name
+            shutil.move(
+                f"{downloaded_file.name}", dest_file
+            )  # aiofiles doesnt seem to have an async variant of this
+        return dest_file
 
     def upload_file(
         self,
@@ -105,7 +138,7 @@ async def upload_file_async(
             file = Path(file)
         if not file.is_file():
             raise RuntimeError(f"{file} is not a file")
-        checksum: str = compute_sha256(file)
+        checksum: str = await compute_sha256(file)
         for file_result in self._search_files(
             sha256_checksum=checksum, timeout_seconds=timeout_seconds
         ):
@@ -159,7 +192,7 @@ async def upload_file_async(
             )
             async with AsyncHttpClient(
                 configuration=self.api_client.configuration,
-                request_type="post",
+                method="post",
                 url=links.abort_upload,
                 body=abort_body.to_dict(),
                 base_url=self.api_client.configuration.host,

clients/python/src/osparc/_http_client.py

@@ -1,7 +1,16 @@
 from contextlib import suppress
 from datetime import datetime
 from email.utils import parsedate_to_datetime
-from typing import Any, Awaitable, Callable, Dict, Optional, Set
+from typing import (
+    Any,
+    Awaitable,
+    Callable,
+    Dict,
+    Optional,
+    Set,
+    Literal,
+    AsyncGenerator,
+)
 
 import httpx
 import tenacity
@@ -17,14 +26,14 @@ def __init__(
         self,
         *,
         configuration: Configuration,
-        request_type: Optional[str] = None,
+        method: Optional[str] = None,
         url: Optional[str] = None,
         body: Optional[Dict] = None,
         **httpx_async_client_kwargs,
     ):
         self.configuration = configuration
         self._client = httpx.AsyncClient(**httpx_async_client_kwargs)
-        self._callback = getattr(self._client, request_type) if request_type else None
+        self._callback = getattr(self._client, method) if method else None
         self._url = url
         self._body = body
         if self._callback is not None:
@@ -77,6 +86,28 @@ async def _():
 
         return await _()
 
+    async def _stream(
+        self, method: Literal["GET"], url: str, *args, **kwargs
+    ) -> AsyncGenerator[httpx.Response, None]:
+        n_attempts = self.configuration.retries.total
+        assert isinstance(n_attempts, int)
+
+        @tenacity.retry(
+            reraise=True,
+            wait=self._wait_callback,
+            stop=tenacity.stop_after_attempt(n_attempts),
+            retry=tenacity.retry_if_exception_type(httpx.HTTPStatusError),
+        )
+        async def _() -> AsyncGenerator[httpx.Response, None]:
+            async with self._client.stream(
+                method=method, url=url, *args, **kwargs
+            ) as response:
+                if response.status_code in self.configuration.retries.status_forcelist:
+                    response.raise_for_status()
+                yield response
+
+        return _()
+
     async def put(self, *args, **kwargs) -> httpx.Response:
         return await self._request(self._client.put, *args, **kwargs)
 
@@ -92,6 +123,11 @@ async def patch(self, *args, **kwargs) -> httpx.Response:
     async def get(self, *args, **kwargs) -> httpx.Response:
         return await self._request(self._client.get, *args, **kwargs)
 
+    async def stream(
+        self, method: Literal["GET"], url: str, *args, **kwargs
+    ) -> AsyncGenerator[httpx.Response, None]:
+        return await self._stream(method=method, url=url, *args, **kwargs)
+
     def _wait_callback(self, retry_state: tenacity.RetryCallState) -> int:
         assert retry_state.outcome is not None
         if retry_state.outcome and retry_state.outcome.exception():

clients/python/src/osparc/_utils.py

@@ -16,7 +16,7 @@
     Solver,
     Study,
 )
-
+import aiofiles
 from ._exceptions import RequestError
 
 _KB = 1024  # in bytes
@@ -87,15 +87,15 @@ async def file_chunk_generator(
     bytes_read: int = 0
     file_size: int = file.stat().st_size
     while bytes_read < file_size:
-        with open(file, "rb") as f:
-            f.seek(bytes_read)
+        async with aiofiles.open(file, "rb") as f:
+            await f.seek(bytes_read)
             nbytes = (
                 chunk_size
                 if (bytes_read + chunk_size <= file_size)
                 else (file_size - bytes_read)
             )
             assert nbytes > 0
-            chunk = await asyncio.get_event_loop().run_in_executor(None, f.read, nbytes)
+            chunk = await f.read(nbytes)
             yield chunk, nbytes
             bytes_read += nbytes
 
@@ -109,16 +109,16 @@ async def _fcn_to_coro(callback: Callable[..., S], *args) -> S:
     return result
 
 
-def compute_sha256(file: Path) -> str:
+async def compute_sha256(file: Path) -> str:
     assert file.is_file()
     sha256 = hashlib.sha256()
-    with open(file, "rb") as f:
+    async with aiofiles.open(file, "rb") as f:
         while True:
-            data = f.read(100 * _KB)
+            data = await f.read(100 * _KB)
             if not data:
                 break
             sha256.update(data)
-        return sha256.hexdigest()
+    return sha256.hexdigest()
 
 
 def dev_features_enabled() -> bool:

clients/python/test/e2e/_utils.py

@@ -24,20 +24,6 @@ def repo_version() -> Version:
     return Version(version_file.read_text())
 
 
-def skip_if_no_dev_features(test):
-    if (
-        Version(osparc.__version__) < repo_version()
-        or not osparc_dev_features_enabled()
-    ):
-        return pytest.mark.skip(
-            (
-                f"{osparc.__version__=}<{str(repo_version)} "
-                f"or {osparc_dev_features_enabled()=}"
-            )
-        )(test)
-    return test
-
-
 def skip_if_osparc_version(
     *,
     at_least: Optional[Version] = None,

clients/python/test/e2e/conftest.py

@@ -17,18 +17,14 @@
 from numpy import random
 from packaging.version import Version
 from pydantic import ByteSize
+from typing import Callable
 
 try:
     from osparc._settings import ConfigurationEnvVars
 except ImportError:
     pass
 
 
-_KB: ByteSize = ByteSize(1024)  # in bytes
-_MB: ByteSize = ByteSize(_KB * 1024)  # in bytes
-_GB: ByteSize = ByteSize(_MB * 1024)  # in bytes
-
-
 # Dictionary to store start times of tests
 _test_start_times = {}
 
@@ -133,20 +129,24 @@ def async_client() -> Iterable[AsyncClient]:
 
 
 @pytest.fixture
-def tmp_file(tmp_path: Path, caplog: pytest.LogCaptureFixture) -> Path:
-    caplog.set_level(logging.INFO)
-    byte_size: ByteSize = 1 * _GB
-    tmp_file = tmp_path / "large_test_file.txt"
-    ss: random.SeedSequence = random.SeedSequence()
-    logging.info("Entropy used to generate random file: %s", f"{ss.entropy}")
-    rng: random.Generator = random.default_rng(ss)
-    tmp_file.write_bytes(rng.bytes(1000))
-    with open(tmp_file, "wb") as f:
-        f.truncate(byte_size)
-    assert (
-        tmp_file.stat().st_size == byte_size
-    ), f"Could not create file of size: {byte_size}"
-    return tmp_file
+def create_tmp_file(
+    tmp_path: Path, caplog: pytest.LogCaptureFixture
+) -> Callable[[ByteSize], Path]:
+    def _generate_file(file_size: ByteSize):
+        caplog.set_level(logging.INFO)
+        tmp_file = tmp_path / "large_test_file.txt"
+        ss: random.SeedSequence = random.SeedSequence()
+        logging.info("Entropy used to generate random file: %s", f"{ss.entropy}")
+        rng: random.Generator = random.default_rng(ss)
+        tmp_file.write_bytes(rng.bytes(1000))
+        with open(tmp_file, "wb") as f:
+            f.truncate(file_size)
+        assert (
+            tmp_file.stat().st_size == file_size
+        ), f"Could not create file of size: {file_size}"
+        return tmp_file
+
+    return _generate_file
 
 
 @pytest.fixture