求生之路2 Linux服务器从工坊下载地图脚本（python脚本

笔者使用的是python 3.8.6rc1,由于python3本身不支持https下载，因此需要参考这篇文章来实现https下载.

import urllib.request
import chardet
import re
import ssl
import sys
import time


steamID=input("请输入地图steamID")
page = urllib.request.urlopen('http://steamworkshop.download/download/view/'+steamID) #打开网页

htmlCode=page.read()  #获取网页源码
data=htmlCode.decode('utf-8')
reg_url = re.compile(r'(?<=https://steamusercontent).*?(?=\')')
urlList=reg_url.findall(data)
for url in urlList:
    downloadUrl='https://steamusercontent'+url
    break
reg_name = re.compile(r'(?<=title=\').*?(?=\'>Download)')
nameList=reg_name.findall(data)
for name in nameList:
    downloadName=name+'.vpk'
    break

'''
 urllib.urlretrieve 的回调函数：
def callbackfunc(blocknum, blocksize, totalsize):
    @blocknum:  已经下载的数据块
    @blocksize: 数据块的大小
    @totalsize: 远程文件的大小
'''
 
def Schedule(blocknum, blocksize, totalsize):
    speed = (blocknum * blocksize) / (time.time() - start_time)
    # speed_str = " Speed: %.2f" % speed
    speed_str = " Speed: %s" % format_size(speed)

    recv_size = blocknum * blocksize
     
    # 设置下载进度条
    f = sys.stdout
    pervent = recv_size / totalsize
    percent_str = "%.2f%%" % (pervent * 100)
    n = round(pervent * 50)
    s = ('#' * n).ljust(50, '-')
    f.write(percent_str.ljust(8, ' ') + '[' + s + ']' + speed_str)
    f.flush()
    # time.sleep(0.1)
    f.write('\r')
 
# 字节bytes转化K\M\G
def format_size(bytes):
    try:
        bytes = float(bytes)
        kb = bytes / 1024
    except:
        print("传入的字节格式不对")
        return "Error"
    if kb >= 1024:
        M = kb / 1024
        if M >= 1024:
            G = M / 1024
            return "%.3fG" % (G)
        else:
            return "%.3fM" % (M)
    else:
        return "%.3fK" % (kb)
 
if __name__ == '__main__':
    # print(format_size(1222222222))
    start_time = time.time()
print(downloadUrl)
print(downloadName)
def validateTitle(downloadName):
    rstr = r"[\/\\\:\*\?\"\<\>\|]"  # '/ \ : * ? " < > |'
    new_downloadName = re.sub(rstr, "_", downloadName)  # 替换为下划线
    new_downloadName = new_downloadName.replace("&#39;","_")
    new_downloadName = new_downloadName.replace(" ","_")
    new_downloadName = new_downloadName.replace("]","_")
    new_downloadName = new_downloadName.replace("[","_")    return new_downloadName
urllib.request.urlretrieve(downloadUrl,validateTitle(downloadName),Schedule)