conditional_downloads.py 文件源码

def main(reactor, *args):
    client = http.HTTPClient()
    fname = os.path.join(tmp, str(uuid.uuid4()))
    yield httpRequest(client._agent, URI, method='GET', saveto=fname)
    filesize = os.path.getsize(fname)
    assert filesize > 1
    # touch file to 5 minutes in the past
    past = int(os.path.getmtime(fname)) - 300
    print "PAST MTIME", past
    os.utime(fname, (past, past))
    assert os.path.getmtime(fname) == past
    yield httpRequest(client._agent, URI, method='GET', saveto=fname)
    # it was not modified
    current = os.path.getmtime(fname)
    print "CURRENT MTIME", current
    assert int(current) == past
    print 'OK'
    shutil.rmtree(tmp)