完成基本功能。

.gitignore

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+venv

downloader.py

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+import requests
+import datetime
+
+# file_size if byte
+
+
+def download_file(url, chunk_size=64 * 1024, file_size=100 * 1024 * 1024):
+    chunk_read = 0
+    s_time = datetime.datetime.now()
+    e_time = None
+    with requests.get(url, stream=True) as r:
+        for chunk in r.iter_content(chunk_size):
+            if chunk_read >= file_size:
+                e_time = datetime.datetime.now()
+                break
+            if chunk:
+                chunk_read += len(chunk)
+    duration = (e_time - s_time).total_seconds()
+    speed = chunk_read / duration / 1024 / 1024 * 8  # mega bit
+    # print("{} MB download".format(chunk_read / 1024 / 1024))
+    # print("{} seconds".format(duration / 1))
+    return speed