首先這篇文章是轉(zhuǎn)載的，但是我看懂了，經(jīng)過(guò)修改成功了?。?/h3>

PS上一節(jié)課：請(qǐng)查看【爬蟲專欄】

本文所需的庫(kù)（其余為內(nèi)置庫(kù)）：

我依照原帖的思路講一下：

第 1 步，進(jìn)入百度翻譯網(wǎng)頁(yè)版：點(diǎn)我

第 2 步 分析所需參數(shù)

這里我們發(fā)現(xiàn)所需的參數(shù)：

1、sign（這是最重要的！?。?/h4>

2、token

3、ts，時(shí)間戳

第 3 步 分析sign 加密代碼，這里我就直接展示出來(lái)了

請(qǐng)將該文件命名【webtrans.js】

// webtrans.js

function n(r, o) {
    for (var t = 0; t < o.length - 2; t += 3) {
        var a = o.charAt(t + 2);
        a = a >= "a" ? a.charCodeAt(0) - 87 : Number(a),
        a = "+" === o.charAt(t + 1) ? r >>> a : r << a,
        r = "+" === o.charAt(t) ? r + a & 4294967295 : r ^ a
    }
    return r
}
function e(r) {
    var o = r.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g);
    if (null === o) {
        var t = r.length;
        t > 30 && (r = "" + r.substr(0, 10) + r.substr(Math.floor(t / 2) - 5, 10) + r.substr(-10, 10))
    } else {
        for (var e = r.split(/[\uD800-\uDBFF][\uDC00-\uDFFF]/), C = 0, h = e.length, f = []; h > C; C++)
            "" !== e[C] && f.push.apply(f, a(e[C].split(""))),
            C !== h - 1 && f.push(o[C]);
        var g = f.length;
        g > 30 && (r = f.slice(0, 10).join("") + f.slice(Math.floor(g / 2) - 5, Math.floor(g / 2) + 5).join("") + f.slice(-10).join(""))
    }
    var u = void 0
      ,
        // l = "" + String.fromCharCode(103) + String.fromCharCode(116) + String.fromCharCode(107);
        i = null;
        u = null !== i ? i : (i = window[l] || "") || "";
    for (var d = u.split("."), m = Number(d[0]) || 0, s = Number(d[1]) || 0, S = [], c = 0, v = 0; v < r.length; v++) {
        var A = r.charCodeAt(v);
        128 > A ? S[c++] = A : (2048 > A ? S[c++] = A >> 6 | 192 : (55296 === (64512 & A) && v + 1 < r.length && 56320 === (64512 & r.charCodeAt(v + 1)) ? (A = 65536 + ((1023 & A) << 10) + (1023 & r.charCodeAt(++v)),
        S[c++] = A >> 18 | 240,
        S[c++] = A >> 12 & 63 | 128) : S[c++] = A >> 12 | 224,
        S[c++] = A >> 6 & 63 | 128),
        S[c++] = 63 & A | 128)
    }
    for (var p = m, F = "" + String.fromCharCode(43) + String.fromCharCode(45) + String.fromCharCode(97) + ("" + String.fromCharCode(94) + String.fromCharCode(43) + String.fromCharCode(54)), D = "" + String.fromCharCode(43) + String.fromCharCode(45) + String.fromCharCode(51) + ("" + String.fromCharCode(94) + String.fromCharCode(43) + String.fromCharCode(98)) + ("" + String.fromCharCode(43) + String.fromCharCode(45) + String.fromCharCode(102)), b = 0; b < S.length; b++)
        p += S[b],
        p = n(p, F);
    return p = n(p, D),
    p ^= s,
    0 > p && (p = (2147483647 & p) + 2147483648),
    p %= 1e6,
    p.toString() + "." + (p ^ m)
}

第 4 步：

在調(diào)用上述js函數(shù)前，需要獲取網(wǎng)頁(yè)中的【window.bdstoken】以及【window.gtk】，如下圖

只有拿到這兩個(gè)才能生成 sign

第 5 步

通過(guò)【js2py】庫(kù) 調(diào)用剛剛保存的 【webtrans.js】，獲取最終的 【sign】

目錄結(jié)構(gòu)

文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-720889.html

附上完整版代碼1(自己的改寫版，后面還附贈(zèng)進(jìn)階版(面向?qū)ο?)

注意事項(xiàng)(必看)

代碼17行：token = ‘請(qǐng)您寫上自己的token’

代碼52行：token = ‘請(qǐng)您寫上自己的token’

代碼60行：cookies = {‘Cookie’: ‘請(qǐng)您寫上自己的cookie’}

import json
import re
import time
import requests
import js2py




def get_token_gtk():
    '''獲取token和gtk(用于合成Sign)'''
    url = 'https://fanyi.baidu.com/'
    resp = requests.get(url)
    html_str = resp.content.decode()
    # print(html_str)
    # token = re.findall(r"token: '(.*?)'", html_str)[0]
    token = '請(qǐng)您寫上自己的token'
    # print('token: ',token)
    pattern = r'gtk = "(.*?)\"'
    gtk = re.search(pattern, html_str).group(1)
    # print('gtk: ',gtk)
    # gtk = re.match(r".gtk = '(.*?)'", html_str)
    # print(token, gtk)
    return token, gtk
# get_token_gtk()

word = input("請(qǐng)輸入你想翻譯的中文：")

def generate_sign(gtk):
    """生成sign"""
    # 1. 準(zhǔn)備js編譯環(huán)境
    context = js2py.EvalJs()
    with open('webtrans.js', encoding='utf8') as f:
        js_data = f.read()
        js_data = re.sub("window\[l\]",'"'+gtk+'"',js_data)
        # js_data = re.sub("window\[l\]", "\"{}\"".format(gtk), js_data)
        # print(js_data)
        context.execute(js_data)
    sign = context.e(word)
    return sign

# print(generate_sign(get_token_gtk()[1]))


params = {
'from': 'zh',
'to': 'en',
'query': word,
'transtype': 'realtime',
'simple_means_flag': '3',
'sign': generate_sign(get_token_gtk()[1]),
'token': '請(qǐng)您寫上自己的token',
'domain': 'common',
'ts': int(time.time()),
}
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36',
}
cookies = {
'Cookie': '請(qǐng)您寫上自己的cookie'
}
url2 = 'https://fanyi.baidu.com/v2transapi?from=zh&to=en'
res_data = requests.post(url=url2,params=params,headers=headers,cookies=cookies)
res_data.encoding= "utf-8"
data  = json.loads(res_data.text)
# print(data)
print(f"輸入：{data['trans_result']['data'][0]['src']}")
print(f"翻譯：{data['trans_result']['data'][0]['dst']}")

完整版2（面向?qū)ο蟀妫?/h3>

# 面向?qū)ο?/span>
# 百度翻譯 -- 網(wǎng)頁(yè)版(自動(dòng)獲取token,sign)
import requests
import js2py
import json
import re


class WebFanyi:
    """百度翻譯網(wǎng)頁(yè)版爬蟲"""
    def __init__(self,query_str):
        self.session = requests.session()
        headers = {
            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36",
        }
        self.session.headers = headers
        self.baidu_url = "https://www.baidu.com/"
        self.root_url = "https://fanyi.baidu.com/"
        self.lang_url = "https://fanyi.baidu.com/langdetect"
        self.trans_url = "https://fanyi.baidu.com/v2transapi"
        self.query_str = query_str

    def get_token_gtk(self):
        '''獲取token和gtk(用于合成Sign)'''
        self.session.get(self.root_url)
        resp = self.session.get(self.root_url)
        html_str = resp.content.decode()
        # print(html_str)
        token = re.findall(r"token: '(.*?)'", html_str)[0]
        # print(token)
        pattern = r'gtk = "(.*?)\"'
        gtk = re.search(pattern, html_str).group(1)
        # print(gtk)
        # gtk = re.match(r".gtk = '(.*?)'", html_str)

        return token,gtk

    def generate_sign(self,gtk):
        """生成sign"""
        # 1. 準(zhǔn)備js編譯環(huán)境
        context = js2py.EvalJs()
        with open('webtrans.js', encoding='utf8') as f:
            js_data = f.read()
            js_data = re.sub("window\[l\]",'"'+gtk+'"',js_data)
            # js_data = re.sub("window\[l\]", "\"{}\"".format(gtk), js_data)
            print(js_data)
            context.execute(js_data)
        sign = context.e(self.query_str)
        return sign

    def lang_detect(self):
        '''獲取語(yǔ)言轉(zhuǎn)換類型.eg: zh-->en'''
        lang_resp = self.session.post(self.lang_url,data={"query":self.query_str})
        lang_json_str = lang_resp.content.decode()  # {"error":0,"msg":"success","lan":"zh"}
        lan = json.loads(lang_json_str)['lan']
        to = "en" if lan == "zh" else "zh"
        return lan,to


    def parse_url(self,post_data):
        trans_resp = self.session.post(self.trans_url,data=post_data)
        trans_json_str = trans_resp.content.decode()
        trans_json = json.loads(trans_json_str)
        result = trans_json["trans_result"]["data"][0]["dst"]
        print("{}: {}".format(self.query_str,result))

    def run(self):
        """實(shí)現(xiàn)邏輯"""
        # 1.獲取百度的cookie,(缺乏百度首頁(yè)的cookie會(huì)始終報(bào)錯(cuò)998)
        self.session.get(self.baidu_url)
        # 2. 獲取百度翻譯的token和gtk(用于合成sign)
        token, gtk = self.get_token_gtk()
        # 3. 生成sign
        sign = self.generate_sign(gtk)
        # 4. 獲取語(yǔ)言轉(zhuǎn)換類型.eg: zh-->en
        lan, to = self.lang_detect()
        # 5. 發(fā)送請(qǐng)求,獲取響應(yīng),輸出結(jié)果
        post_data = {
            "from": lan,
            "to": to,
            "query": self.query_str,
            "transtype": "realtime",
            "simple_means_flag": 3,
            "sign": sign,
            "token": token
        }
        self.parse_url(post_data)

if __name__ == '__main__':
    webfanyi = WebFanyi('西瓜')
    webfanyi.run()

原帖查看

希望對(duì)大家有幫助

我也正在努力學(xué)習(xí)爬蟲，大家共同進(jìn)步?。?/h3>

都看到這了，關(guān)注+點(diǎn)贊+收藏=不迷路?。?/h3>

到了這里，關(guān)于Python爬蟲實(shí)戰(zhàn)(高級(jí)篇)—3百度翻譯網(wǎng)頁(yè)版爬蟲(附完整代碼)的文章就介紹完了。如果您還想了解更多內(nèi)容，請(qǐng)?jiān)谟疑辖撬阉鱐OY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！