Python 實(shí)現(xiàn)的 Google 批量翻譯功能

更新時(shí)間：2019年08月26日 13:33:33 作者：呆呆大蝦

這篇文章主要介紹了Python 實(shí)現(xiàn)的 Google 批量翻譯功能，非常不錯(cuò)，具有一定的參考借鑒價(jià)值,需要的朋友可以參考下

首先聲明，沒有什么不良動(dòng)機(jī)，因?yàn)榻?jīng)常會(huì)用 translate.google.cn，就想著用 Python 模擬網(wǎng)頁(yè)提交實(shí)現(xiàn)文檔的批量翻譯。據(jù)說有 API，可是要收費(fèi)。

生成 Token

Google 為防爬蟲而生成 token 的代碼是 Javascript 的，且是根據(jù)網(wǎng)站的 TKK 值和提交的文本動(dòng)態(tài)生成。更新規(guī)律未知，只好定時(shí)去取一下了。

網(wǎng)上能找到的 Python 代碼大部分是去調(diào)用 PyExecJS 庫(kù)，先不說執(zhí)行效率的高低（大概是差一個(gè)數(shù)量級(jí)），首先是舍近求遠(yuǎn)，不純粹，本人不喜歡。

好不容易找到了一段 Python 代碼還有點(diǎn)小 Bug，且缺少動(dòng)態(tài)獲取 TKK 的步驟。最后還是對(duì)照 Javascript 代碼自己改成 Python 了。方法很簡(jiǎn)單，先轉(zhuǎn)成易懂的 Javascript，再轉(zhuǎn)成 Python。Javascript 代碼來自C#實(shí)現(xiàn)谷歌翻譯API。

原始（晦澀） Javascript 代碼

var b = function (a, b) {
 for (var d = 0; d < b.length - 2; d += 3) {
 var c = b.charAt(d + 2),
  c = "a" <= c ? c.charCodeAt(0) - 87 : Number(c),
  c = "+" == b.charAt(d + 1) ? a >>> c : a << c;
 a = "+" == b.charAt(d) ? a + c & 4294967295 : a ^ c
 }
 return a
}
var tk = function (a,TKK) {
 for (var e = TKK.split("."), h = Number(e[0]) || 0, g = [], d = 0, f = 0; f < a.length; f++) {
 var c = a.charCodeAt(f);
 128 > c ? g[d++] = c : (2048 > c ? g[d++] = c >> 6 | 192 : (55296 == (c & 64512) && f + 1 < a.length && 56320 == (a.charCodeAt(f + 1) & 64512) ? (c = 65536 + ((c & 1023) << 10) + (a.charCodeAt(++f) & 1023), g[d++] = c >> 18 | 240, g[d++] = c >> 12 & 63 | 128) : g[d++] = c >> 12 | 224, g[d++] = c >> 6 & 63 | 128), g[d++] = c & 63 | 128)
 }
 a = h;
 for (d = 0; d < g.length; d++) a += g[d], a = b(a, "+-a^+6");
 a = b(a, "+-3^+b+-f");
 a ^= Number(e[1]) || 0;
 0 > a && (a = (a & 2147483647) + 2147483648);
 a %= 1E6;
 return a.toString() + "." + (a ^ h)
}

易懂的 Javascript 代碼

function RL(a, b) {
 for (var d = 0; d < b.length - 2; d += 3) {
 var c = b.charAt(d + 2);
 c = "a" <= c ? c.charCodeAt(0) - 87 : Number(c);
 c = "+" == b.charAt(d + 1) ? a >>> c : a << c;
 a = "+" == b.charAt(d) ? a + c & 4294967295 : a ^ c;
 }
 return a
}
function TL(a,TKK) {
 var e = TKK.split(".");
 var h = Number(e[0]) || 0;
 var g = [];
 var d = 0;
 for (var f = 0; f < a.length; f++) {
 var c = a.charCodeAt(f);
 if (128 > c)
 {
  g[d++] = c;
 } 
 else
 {
  if (2048 > c)
  {
  g[d++] = c >> 6 | 192;
  }
  else
  {
  if (55296 == (c & 64512) && f + 1 < a.length && 56320 == (a.charCodeAt(f + 1) & 64512))
  {
   c = 65536 + ((c & 1023) << 10) + (a.charCodeAt(++f) & 1023);
   g[d++] = c >> 18 | 240;
   g[d++] = c >> 12 & 63 | 128;
  }
  else
  {
   g[d++] = c >> 12 | 224;
   g[d++] = c >> 6 & 63 | 128;
  }
  }
  g[d++] = c & 63 | 128;
 }
 }
 a = h;
 for (var d = 0; d < g.length; d++) {
 a += g[d];
 a = b(a, "+-a^+6");
 }
 a = b(a, "+-3^+b+-f");
 a ^= Number(e[1]) || 0;
 0 > a && (a = (a & 2147483647) + 2147483648);
 a %= 1E6;
 return a.toString() + "." + (a ^ h)
}

Python 代碼

def getGoogleToken(a, TKK):
 def RL(a, b):
 for d in range(0, len(b)-2, 3):
  c = b[d + 2]
  c = ord(c[0]) - 87 if 'a' <= c else int(c)
  c = a >> c if '+' == b[d + 1] else a << c
  a = a + c & 4294967295 if '+' == b[d] else a ^ c
 return a
 g = []
 f = 0
 while f < len(a):
 c = ord(a[f])
 if 128 > c:
  g.append(c)
 else:
  if 2048 > c:
  g.append((c >> 6) | 192)
  else:
  if (55296 == (c & 64512)) and (f + 1 < len(a)) and (56320 == (ord(a[f+1]) & 64512)):
   f += 1
   c = 65536 + ((c & 1023) << 10) + (ord(a[f]) & 1023)
   g.append((c >> 18) | 240)
   g.append((c >> 12) & 63 | 128)
  else:
   g.append((c >> 12) | 224)
   g.append((c >> 6) & 63 | 128)
  g.append((c & 63) | 128)
 f += 1
 e = TKK.split('.')
 h = int(e[0]) or 0
 t = h
 for item in g:
 t += item
 t = RL(t, '+-a^+6')
 t = RL(t, '+-3^+b+-f')
 t ^= int(e[1]) or 0
 if 0 > t:
 t = (t & 2147483647) + 2147483648
 result = t % 1000000
 return str(result) + '.' + str(result ^ h)

獲取 Token Key

Google 的 TKK 可以通過訪問網(wǎng)站 https://translate.google.cn 獲取，里面有段腳本里包含了“tkk:('xxxxxx.xxxxxx')”，用正則表達(dá)式截取即可。

res = requests.get('https://translate.google.cn', timeout = 3)
 res.raise_for_status()
 result = re.search(r'tkk\:\'(\d+\.\d+)?\'', res.text).group(1)

劃分文章段落

因?yàn)槌?PDF 里復(fù)制文本翻譯，這樣就不能依賴換行符來劃分段落了。只能判斷空行，作為段落的分界。

另外 Google 返回的結(jié)果 Json 里，會(huì)以英文句點(diǎn)作為分隔符，每一句譯文均作為數(shù)組的一項(xiàng)分開。所以最后得合并一下，成為一個(gè)段落。

完整代碼

代碼不長(zhǎng)，全文黏貼如下。

GoogleTranslator.py：
import requests
import re
import json
import time
class GoogleTranslator ():
 _host = 'translate.google.cn'
 _headers = {
 'Host': _host,
 'User-Agent': 'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Mobile Safari/537.36',
 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
 'Accept-Language': 'zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3',
 'Accept-Encoding': 'gzip, deflate, br',
 'Content-Type': 'application/x-www-form-urlencoded;charset=utf-8',
 'Referer': 'https://' + _host,
 'Connection': 'keep-alive',
 'Cache-Control': 'max-age=0'
 }
 _language = {
 'afrikaans': 'af',
 'arabic': 'ar',
 'belarusian': 'be',
 'bulgarian': 'bg',
 'catalan': 'ca',
 'czech': 'cs',
 'welsh': 'cy',
 'danish': 'da',
 'german': 'de',
 'greek': 'el',
 'english': 'en',
 'esperanto': 'eo',
 'spanish': 'es',
 'estonian': 'et',
 'persian': 'fa',
 'finnish': 'fi',
 'french': 'fr',
 'irish': 'ga',
 'galician': 'gl',
 'hindi': 'hi',
 'croatian': 'hr',
 'hungarian': 'hu',
 'indonesian': 'id',
 'icelandic': 'is',
 'italian': 'it',
 'hebrew': 'iw',
 'japanese': 'ja',
 'korean': 'ko',
 'latin': 'la',
 'lithuanian': 'lt',
 'latvian': 'lv',
 'macedonian': 'mk',
 'malay': 'ms',
 'maltese': 'mt',
 'dutch': 'nl',
 'norwegian': 'no',
 'polish': 'pl',
 'portuguese': 'pt',
 'romanian': 'ro',
 'russian': 'ru',
 'slovak': 'sk',
 'slovenian': 'sl',
 'albanian': 'sq',
 'serbian': 'sr',
 'swedish': 'sv',
 'swahili': 'sw',
 'thai': 'th',
 'filipino': 'tl',
 'turkish': 'tr',
 'ukrainian': 'uk',
 'vietnamese': 'vi',
 'yiddish': 'yi',
 'chinese_simplified': 'zh-CN',
 'chinese_traditional': 'zh-TW',
 'auto': 'auto'
 }
 _url = 'https://' + _host + '/translate_a/single'
 _params = {
  'client': 'webapp',
  'sl': 'en',
  'tl': 'zh-CN',
  'hl': 'zh-CN',
  'dt': 'at',
  'dt': 'bd',
  'dt': 'ex',
  'dt': 'ld',
  'dt': 'md',
  'dt': 'qca',
  'dt': 'rw',
  'dt': 'rm',
  'dt': 'ss',
  'dt': 't',
  'otf': '1',
  'ssel': '0',
  'tsel': '0',
  'kc': '1'
 }
 __cookies = None
 __googleTokenKey = '376032.257956'
 __googleTokenKeyUpdataTime = 600.0
 __googleTokenKeyRetireTime = time.time() + 600.0
 def __init__(self, src = 'en', dest = 'zh-CN', tkkUpdataTime = 600.0):
 if src not in self._language and src not in self._language.values():
  src = 'auto'
 if dest not in self._language and dest not in self._language.values():
  dest = 'auto'
 self._params['sl'] = src
 self._params['tl'] = dest
 self.googleTokenKeyUpdataTime = tkkUpdataTime
 self.__updateGoogleTokenKey()
 def __updateGoogleTokenKey(self):
 self.__googleTokenKey = self.__getGoogleTokenKey()
 self.__googleTokenKeyRetireTime = time.time() + self.__googleTokenKeyUpdataTime
 def __getGoogleTokenKey(self):
 """Get the Google TKK from https://translate.google.cn"""
 # TKK example: '435075.3634891900'
 result = ''
 try:
  res = requests.get('https://' + self._host, timeout = 3)
  res.raise_for_status()
  self.__cookies = res.cookies
  result = re.search(r'tkk\:\'(\d+\.\d+)?\'', res.text).group(1)
 except requests.exceptions.ReadTimeout as ex:
  print('ERROR: ' + str(ex))
  time.sleep(1)
 return result
 def __getGoogleToken(self, a, TKK):
 """Calculate Google tk from TKK """
 # https://www.cnblogs.com/chicsky/p/7443830.html
 # if text = 'Tablet Developer' and TKK = '435102.3120524463', then tk = '315066.159012'
 def RL(a, b):
  for d in range(0, len(b)-2, 3):
  c = b[d + 2]
  c = ord(c[0]) - 87 if 'a' <= c else int(c)
  c = a >> c if '+' == b[d + 1] else a << c
  a = a + c & 4294967295 if '+' == b[d] else a ^ c
  return a
 g = []
 f = 0
 while f < len(a):
  c = ord(a[f])
  if 128 > c:
  g.append(c)
  else:
  if 2048 > c:
   g.append((c >> 6) | 192)
  else:
   if (55296 == (c & 64512)) and (f + 1 < len(a)) and (56320 == (ord(a[f+1]) & 64512)):
   f += 1
   c = 65536 + ((c & 1023) << 10) + (ord(a[f]) & 1023)
   g.append((c >> 18) | 240)
   g.append((c >> 12) & 63 | 128)
   else:
   g.append((c >> 12) | 224)
   g.append((c >> 6) & 63 | 128)
  g.append((c & 63) | 128)
  f += 1
 e = TKK.split('.')
 h = int(e[0]) or 0
 t = h
 for item in g:
  t += item
  t = RL(t, '+-a^+6')
 t = RL(t, '+-3^+b+-f')
 t ^= int(e[1]) or 0
 if 0 > t:
  t = (t & 2147483647) + 2147483648
 result = t % 1000000
 return str(result) + '.' + str(result ^ h)
 def translate(self, text):
 if time.time() > self.__googleTokenKeyRetireTime:
  self.__updateGoogleTokenKey()
 data = {'q': text}
 self._params['tk'] = self.__getGoogleToken(text, self.__googleTokenKey)
 result = ''
 try:
  res = requests.post(self._url,
    headers = self._headers,
    cookies = self.__cookies,
    data = data,
    params = self._params,
    timeout = 6)
  res.raise_for_status()
  jsonText = res.text
  if len(jsonText)>0:
  jsonResult = json.loads(jsonText)
  if len(jsonResult[0])>0:
   for item in jsonResult[0]:
   result += item[0]
  return result
 except Exception as ex:
  print('ERROR: ' + str(ex))
  return ''
import time
from GoogleTranslator import GoogleTranslator
def readFile(fileName):
 with open(fileName, 'r') as f:
 paragraph = ''
 for line in f:
  if line[0]!='\n':
  paragraph += line.strip('\n')
  else:
  if len(paragraph)>0:
   yield paragraph
   paragraph = ''
 if len(paragraph)>0:
  yield paragraph
main.py：
def main():
 translator = GoogleTranslator()
 count = 0
 with open('C:\\dx\\python\\d.txt', 'w', encoding='utf-8') as df:
 for line in readFile('C:\\dx\\python\\s.txt'):
  if len(line) > 1:
  count += 1
  print('\r' + str(count), end = '', flush = True)
  df.write(line.strip() + "\n")
  result = translator.translate(line)
  df.write(result.strip() + "\n\n")
if __name__ == "__main__":
 startTime = time.time()
 main()
 print()
 print('%.2f seconds' % (time.time() - startTime))

總結(jié)

以上所述是小編給大家介紹的Python 實(shí)現(xiàn)的 Google 批量翻譯功能,希望對(duì)大家有所幫助，如果大家有任何疑問請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)腳本之家網(wǎng)站的支持！
如果你覺得本文對(duì)你有幫助，歡迎轉(zhuǎn)載，煩請(qǐng)注明出處，謝謝！

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