update downloader.py

paddlepalm/downloader.py

+# -*- coding: UTF-8 -*-
+#   Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 from __future__ import print_function
 import os
+try:
+    from urllib.request import urlopen # Python 3
+except ImportError:
+    from urllib2 import urlopen # Python 2
+
+# for https
+import ssl
+ssl._create_default_https_context = ssl._create_unverified_context
 
 _items = {
-    'pretrain': {'ernie-en-uncased-large': 'http://xxxxx',
-                 'xxx': 'xxx',
-                 'utils': None}
-    'reader': {'cls': 'xxx',
-               'xxx': 'xxx',
-               'utils': 'xxx'}
-    'backbone': {xxx}
-    'tasktype': {xxx}
+    'pretrain': {'ernie-en-uncased-large': 'https://ernie.bj.bcebos.com/ERNIE_Large_en_stable-2.0.0.tar.gz',
+                 'bert-en-uncased-large': 'https://bert-models.bj.bcebos.com/uncased_L-24_H-1024_A-16.tar.gz',
+                 'utils': None},
+    'reader': {'utils': None},
+    'backbone': {'utils': None},
+    'tasktype': {'utils': None},
 }
 
 
-def demo():
-    raise NotImplementedError()
-
-
 def _convert():
     raise NotImplementedError()
 
+
 def download(item, scope='all', path='.'):
     item = item.lower()
     scope = scope.lower()
-    assert item in items, '{} is not found. Support list: {}'.format(item, list(items.keys()))
+    assert item in _items, '{} is not found. Support list: {}'.format(item, list(_items.keys()))
+
+   # if not os.path.exists(path + '/' + item):
+   #     os.makedirs(os.path.join(path + '/' + item))
 
-    if not os.path.exists(path, item):
-        os.makedirs(os.path.join(path, item))
 
     def _download(item, scope, silent=False):
         if not silent:
-            print('downloading {}: {} from {}...'.format(item, scope, items[item][scope]), end='')
-        urllib.downloadxxx(items[item][scope], path)
+            print('Downloading {}: {} from {}...'.format(item, scope, _items[item][scope]))
+        data_url = _items[item][scope]
+        data_dir = path + '/' + item + '/' + scope
+        if not os.path.exists(data_dir):
+            os.makedirs(os.path.join(data_dir))
+        filename = data_dir + '/' + data_url.split('/')[-1]
+
+        def chunk_report(bytes_so_far, total_size):
+            percent = float(bytes_so_far) / float(total_size) * 100.0
+            if percent > 100:
+                percent = 100
+            if not silent:
+                print('\r>> Downloading... %.1f%%' %  percent, end="\r")
+
+
+        def chunk_read(response, url, chunk_size = 16 * 1024, report_hook = None):
+            total_size = response.info().getheader('Content-Length').strip()
+            total_size = int(total_size)
+            bytes_so_far = 0
+            with open("%s" % filename, "wb") as f:
+                while 1:
+                    chunk = response.read(chunk_size)
+                    f.write(chunk)
+                    f.flush() 
+                    bytes_so_far += len(chunk)
+                    if not chunk:
+                        break
+                    if report_hook:
+                        report_hook(bytes_so_far, total_size)
+            return bytes_so_far
+
+        response = urlopen(data_url)
+        chunk_read(response, data_url, report_hook=chunk_report)
+       
         if not silent:
             print('done!')
         
-    if items['utils'] is not None:
+    if _items[item]['utils'] is not None:
         _download(item, 'utils', silent=True)
 
     if scope != 'all':
-        assert scope in items[item], '{} is not found. Support scopes: {}'.format(item, list(items[item].keys()))
+        assert scope in _items[item], '{} is not found. Support scopes: {}'.format(item, list(_items[item].keys()))
         _download(item, scope)
     else:
-        for s in items[item].keys():
+        for s in _items[item].keys():
             _download(item, s)