55 lines
2.1 KiB
Python
55 lines
2.1 KiB
Python
from functools import reduce
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from hashlib import md5
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import urllib.parse
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import time
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import requests
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mixinKeyEncTab = [
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46, 47, 18, 2, 53, 8, 23, 32, 15, 50, 10, 31, 58, 3, 45, 35, 27, 43, 5, 49,
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33, 9, 42, 19, 29, 28, 14, 39, 12, 38, 41, 13, 37, 48, 7, 16, 24, 55, 40,
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61, 26, 17, 0, 1, 60, 51, 30, 4, 22, 25, 54, 21, 56, 59, 6, 63, 57, 62, 11,
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36, 20, 34, 44, 52
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]
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def get_mixin_key(orig: str):
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'对 imgKey 和 subKey 进行字符顺序打乱编码'
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return reduce(lambda s, i: s + orig[i], mixinKeyEncTab, '')[:32]
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def enc_wbi(params: dict, img_key: str, sub_key: str):
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'为请求参数进行 wbi 签名'
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mixin_key = get_mixin_key(img_key + sub_key)
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curr_time = round(time.time())
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params['wts'] = curr_time # 添加 wts 字段
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params = dict(sorted(params.items())) # 按照 key 重排参数
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# 过滤 value 中的 "!'()*" 字符
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params = {
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k : ''.join(filter(lambda chr: chr not in "!'()*", str(v)))
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for k, v
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in params.items()
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}
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query = urllib.parse.urlencode(params) # 序列化参数
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wbi_sign = md5((query + mixin_key).encode()).hexdigest() # 计算 w_rid
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params['w_rid'] = wbi_sign
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return params
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def get_wbi_keys() -> tuple[str, str]:
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'获取最新的 img_key 和 sub_key'
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headers = {
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'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36 Edg/137.0.0.0',
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'Referer': 'https://www.bilibili.com/'
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}
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resp = requests.get('https://api.bilibili.com/x/web-interface/nav', headers=headers)
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resp.raise_for_status()
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json_content = resp.json()
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img_url: str = json_content['data']['wbi_img']['img_url']
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sub_url: str = json_content['data']['wbi_img']['sub_url']
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img_key = img_url.rsplit('/', 1)[1].split('.')[0]
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sub_key = sub_url.rsplit('/', 1)[1].split('.')[0]
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return img_key, sub_key
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def get_signed_params(params):
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img_key, sub_key = get_wbi_keys()
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signed_params = enc_wbi(params=params, img_key=img_key, sub_key=sub_key)
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return signed_params
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