Simple Python 2.7 equivalent *wget* function with progress bar.

py27_wget_demo.py

# coding: utf-8
import io
import urllib2


def get_file(src_url, dst_path, callback=None):
    with io.open(dst_path, mode="wb") as dst_file:
        get_stream(src_url, dst_file, callback)


def get_stream(src_url, dst_file, callback=None, buffer_size=io.DEFAULT_BUFFER_SIZE):
    if callback is None:
        def callback(cz, sz):
            pass
    response = urllib2.urlopen(src_url)
    meta = response.info()
    file_size = int(meta.getheader("Content-Length", 0))
    chunk_size = 0
    read_size = buffer_size
    callback(chunk_size, file_size)
    while read_size == buffer_size:
        chunk = response.read(buffer_size)
        dst_file.write(chunk)
        read_size = len(chunk)
        chunk_size += read_size
        callback(chunk_size, file_size)


if __name__ == '__main__':
    my_file = io.BytesIO()


    def my_callback(cz, fz):
        if fz:
            print(r"{:10d}  [{:3.2f}%]".format(cz, cz * 100. / fz))
        else:
            print(r"{:10d}]".format(cz))


    get_stream("http://google.com", my_file, my_callback)