0.参考

1.分析

1.1 输入翻译内容，手动点击“翻译”按钮

 

1.2 查看提交数据，通过多次提交确认变化量

 

1.3 Ctrl+Shift+f 全局搜索 salt 或 sign 定位到三处js代码块，通过搜索提交数据中的`version：2.1`的关键字`2.1`锁定目标代码块：salt 与时间戳相关，通过 MD5 生成 

sign

 

1.4 在上方函数入口添加断点，再次点击“翻译”, F10开始步进调试

 

1.5 python 计算对比 MD5

 

2. 完整代码

import timeimport randomimport reimport hashlibimport requestsfrom scrapy import Selectorurl = 'http://fanyi.youdao.com/'s = requests.Session()s.headers = {    'Referer': 'http://fanyi.youdao.com',    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36'}# Get cookiesr_url = s.get(url)# Get latest D for md5 from file fanyi.min.js# # sel = Selector(text=r_url.text)# url_js = sel.css('script::attr(src)').re_first('.*fanyi.min.js')# r_js = s.get(url_js)# D = re.search(r'D\s*=\s*"(.*?)"', r_js.text).group(1)# print(D)D = 'ebSeFb%=XZ%T[KZ)c(sy!'url_post = 'http://fanyi.youdao.com/translate_o?smartresult=dict&smartresult=rule'data = dict(    # i = 'have you eaten',    i = '你吃饭了吗？',        # from = 'AUTO',    to = 'AUTO',    smartresult = 'dict',    client = 'fanyideskweb',    doctype = 'json',    version = '2.1',    keyfrom = 'fanyi.web',    action = 'FY_BY_CLICKBUTTION',    typoResult = 'false')salt = str(int(time.time()*1000) + random.randint(0, 9))print(salt)m = hashlib.md5()m.update((data['client']+data['i']+salt+D).encode('utf-8'))sign = m.hexdigest()print(sign)data.update({
     'from': 'AUTO', 'salt': salt, 'sign': sign})r_post = s.post(url_post, data=data)print(r_post.json())

 

3.运行代码