[Enhancement] Add deactivate SSL certification verity option

mim/commands/download.py

@@ -35,10 +35,17 @@
     cls=OptionEatAll,
     required=True,
     help='Config ids to download, such as resnet18_8xb16_cifar10')
+@click.option(
+    '--no-check-certificate',
+    'check_certificate',
+    is_flag=True,
+    default=True,
+    help='Ignore ssl certificate check')
 @click.option(
     '--dest', 'dest_root', type=str, help='Destination of saving checkpoints.')
 def cli(package: str,
         configs: List[str],
+        check_certificate: bool = True,
         dest_root: Optional[str] = None) -> None:
     """Download checkpoints from url and parse configs from package.
 
@@ -47,17 +54,20 @@ def cli(package: str,
         > mim download mmcls --config resnet18_8xb16_cifar10
         > mim download mmcls --config resnet18_8xb16_cifar10 --dest .
     """
-    download(package, configs, dest_root)
+    download(package, configs, check_certificate, dest_root)
 
 
 def download(package: str,
              configs: List[str],
+             check_certificate: bool = True,
              dest_root: Optional[str] = None) -> List[str]:
     """Download checkpoints from url and parse configs from package.
 
     Args:
         package (str): Name of package.
         configs (List[str]): List of config ids.
+        check_certificate (bool): Whether to check the ssl certificate.
+            Default: True.
         dest_root (Optional[str]): Destination directory to save checkpoint and
             config. Default: None.
     """
@@ -112,7 +122,8 @@ def download(package: str,
                 echo_success(f'{filename} exists in {dest_root}')
             else:
                 # TODO: check checkpoint hash when all the models are ready.
-                download_from_file(checkpoint_url, checkpoint_path)
+                download_from_file(checkpoint_url, checkpoint_path,
+                                   check_certificate)
 
                 echo_success(
                     f'Successfully downloaded {filename} to {dest_root}')

mim/utils/utils.py

@@ -134,15 +134,19 @@ def get_github_url(package: str) -> str:
 
 def get_content_from_url(url: str,
                          timeout: int = 15,
-                         stream: bool = False) -> Response:
+                         stream: bool = False,
+                         check_certificate: bool = True) -> Response:
     """Get content from url.
 
     Args:
         url (str): Url for getting content.
         timeout (int): Set the socket timeout. Default: 15.
+        check_certificate (bool): Whether to check the ssl certificate.
+            Default: True.
     """
     try:
-        response = requests.get(url, timeout=timeout, stream=stream)
+        response = requests.get(
+            url, timeout=timeout, stream=stream, verify=check_certificate)
     except InvalidURL as err:
         raise highlighted_error(err)  # type: ignore
     except Timeout as err:
@@ -157,19 +161,23 @@ def get_content_from_url(url: str,
 @typing.no_type_check
 def download_from_file(url: str,
                        dest_path: str,
+                       check_certificate: bool,
                        hash_prefix: Optional[str] = None) -> None:
     """Download object at the given URL to a local path.
 
     Args:
         url (str): URL of the object to download.
         dest_path (str): Path where object will be saved.
+        check_certificate (bool): Whether to check the ssl certificate.
+            Default: True.
         hash_prefix (string, optional): If not None, the SHA256 downloaded
             file should start with `hash_prefix`. Default: None.
     """
     if hash_prefix is not None:
         sha256 = hashlib.sha256()
 
-    response = get_content_from_url(url, stream=True)
+    response = get_content_from_url(
+        url, stream=True, check_certificate=check_certificate)
     size = int(response.headers.get('content-length'))
     with open(dest_path, 'wb') as fw:
         content_iter = response.iter_content(chunk_size=1024)