resolve #18 (#19)

* resolve #18

* Change to block char to `=` on Windows

Co-authored-by: shenxianpeng <xianpeng.shen@gmail.com>

Author: 2bndy5

clang_tools/util.py

@@ -5,9 +5,12 @@
 A module containing utility functions.
 """
 import platform
+import math
+from pathlib import Path
 import urllib.request
 from typing import Optional
 from urllib.error import HTTPError
+from http.client import HTTPResponse
 
 
 def check_install_os() -> str:
@@ -37,7 +40,26 @@ def download_file(url: str, file_name: str) -> Optional[str]:
     :returns: The path to downloaded file if  successful, otherwise `None`.
     """
     try:
-        file, _ = urllib.request.urlretrieve(url, file_name)
+        response: HTTPResponse = urllib.request.urlopen(url)
     except (ValueError, HTTPError):
         return None
-    return file
+
+    if response.status != 200:
+        return None
+    length = response.length
+    buffer = bytes()
+    progress_bar = "=" if check_install_os() == "windows" else "█"
+    while len(buffer) < length:
+        block_size = int(length / 20)
+        # show completed
+        completed = len(buffer) / length
+        print("    |" + progress_bar * int(completed * 20), end="")
+        print(" " * math.ceil((1 - completed) * 20), end="|")
+        print(f"{int(completed * 100)}% (of {length} bytes)", end="\r")
+        remaining = length - len(buffer)
+        buffer += response.read(block_size if remaining > block_size else remaining)
+    response.close()
+    print("    |" + (progress_bar * 20) + f"| 100% (of {length} bytes)")
+    file = Path(file_name)
+    file.write_bytes(buffer)
+    return file.as_posix()