js分析 有_道_翻_译 md5

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 2.1 锁定目标代码块：salt时间戳相关，sign通过md5生成

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 time
import random
import re
import hashlib

import requests
from scrapy import Selector


url = '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 cookies
r_url = s.get(url)

# Get latest D for md5 from file fanyi.min.js
# <script type="text/javascript" src="http://shared.ydstatic.com/fanyi/newweb/v1.0.9/scripts/newweb/fanyi.min.js"></script>
# 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())

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3.运行代码