feat(imperative): mge hub pretrained support s3

GitOrigin-RevId: a48e107623e9992ba15c84a55959dbb414df2117

imperative/python/megengine/data/dataset/vision/cifar.py

@@ -106,9 +106,7 @@ class CIFAR10(VisionDataset):
 
     def download(self):
         url = self.url_path + self.raw_file_name
-        load_raw_data_from_url(
-            url, self.raw_file_name, self.raw_file_md5, self.root, self.timeout
-        )
+        load_raw_data_from_url(url, self.raw_file_name, self.raw_file_md5, self.root)
         self.process()
 
     def untar(self, file_path, dirs):

imperative/python/megengine/data/dataset/vision/mnist.py

@@ -118,7 +118,7 @@ class MNIST(VisionDataset):
     def download(self):
         for file_name, md5 in zip(self.raw_file_name, self.raw_file_md5):
             url = self.url_path + file_name
-            load_raw_data_from_url(url, file_name, md5, self.root, self.timeout)
+            load_raw_data_from_url(url, file_name, md5, self.root)
 
     def process(self, train):
         # load raw files and transform them into meta data and datasets Tuple(np.array)

imperative/python/megengine/data/dataset/vision/utils.py

@@ -27,9 +27,7 @@ def _default_dataset_root():
     return default_dataset_root
 
 
-def load_raw_data_from_url(
-    url: str, filename: str, target_md5: str, raw_data_dir: str, timeout: int
-):
+def load_raw_data_from_url(url: str, filename: str, target_md5: str, raw_data_dir: str):
     cached_file = os.path.join(raw_data_dir, filename)
     logger.debug(
         "load_raw_data_from_url: downloading to or using cached %s ...", cached_file
@@ -41,7 +39,7 @@ def load_raw_data_from_url(
                 "    File may be downloaded multiple times. We recommend\n"
                 "    users to download in single process first."
             )
-        md5 = download_from_url(url, cached_file, http_read_timeout=timeout)
+        md5 = download_from_url(url, cached_file)
     else:
         md5 = calculate_md5(cached_file)
     if target_md5 == md5:

imperative/python/megengine/hub/hub.py

@@ -25,7 +25,6 @@ from .const import (
     DEFAULT_PROTOCOL,
     ENV_MGE_HOME,
     ENV_XDG_CACHE_HOME,
-    HTTP_READ_TIMEOUT,
     HUBCONF,
     HUBDEPENDENCY,
 )
@@ -263,14 +262,14 @@ def load_serialized_obj_from_url(url: str, model_dir=None) -> Any:
                 "    File may be downloaded multiple times. We recommend\n"
                 "    users to download in single process first."
             )
-        download_from_url(url, cached_file, HTTP_READ_TIMEOUT)
+        download_from_url(url, cached_file)
 
     state_dict = _mge_load_serialized(cached_file)
     return state_dict
 
 
 class pretrained:
-    r"""Decorator which helps to download pretrained weights from the given url.
+    r"""Decorator which helps to download pretrained weights from the given url. Including fs, s3, http(s).
 
     For example, we can decorate a resnet18 function as follows
 

imperative/python/megengine/utils/http_download.py

@@ -12,6 +12,7 @@ import shutil
 from tempfile import NamedTemporaryFile
 
 import requests
+from megfile import smart_copy, smart_getmd5, smart_getsize
 from tqdm import tqdm
 
 from ..logger import get_logger
@@ -26,41 +27,21 @@ class HTTPDownloadError(BaseException):
     r"""The class that represents http request error."""
 
 
-def download_from_url(url: str, dst: str, http_read_timeout=120):
+class Bar:
+    def __init__(self, total=100):
+        self._bar = tqdm(total=total, unit="iB", unit_scale=True, ncols=80)
+
+    def __call__(self, bytes_num):
+        self._bar.update(bytes_num)
+
+
+def download_from_url(url: str, dst: str):
     r"""Downloads file from given url to ``dst``.
 
     Args:
         url: source URL.
         dst: saving path.
-        http_read_timeout: how many seconds to wait for data before giving up.
     """
     dst = os.path.expanduser(dst)
-    dst_dir = os.path.dirname(dst)
-
-    resp = requests.get(
-        url, timeout=(HTTP_CONNECTION_TIMEOUT, http_read_timeout), stream=True
-    )
-    if resp.status_code != 200:
-        raise HTTPDownloadError("An error occured when downloading from {}".format(url))
-
-    md5 = hashlib.md5()
-    total_size = int(resp.headers.get("Content-Length", 0))
-    bar = tqdm(
-        total=total_size, unit="iB", unit_scale=True, ncols=80
-    )  # pylint: disable=blacklisted-name
-    try:
-        with NamedTemporaryFile("w+b", delete=False, suffix=".tmp", dir=dst_dir) as f:
-            logger.info("Download file to temp file %s", f.name)
-            for chunk in resp.iter_content(CHUNK_SIZE):
-                if not chunk:
-                    break
-                bar.update(len(chunk))
-                f.write(chunk)
-                md5.update(chunk)
-            bar.close()
-        shutil.move(f.name, dst)
-    finally:
-        # ensure tmp file is removed
-        if os.path.exists(f.name):
-            os.remove(f.name)
-    return md5.hexdigest()
+    smart_copy(url, dst, callback=Bar(total=smart_getsize(url)))
+    return smart_getmd5(dst)

imperative/python/requires.txt

@@ -8,3 +8,4 @@ redispy
 deprecated
 mprop
 wheel
+megfile>=0.0.10
\ No newline at end of file