<爬虫>验证码登录三种方式


一、手动输入

 1 import requests
 2 from bs4 import BeautifulSoup
 3 
 4 '''手动输入验证码:用浏览器登录古诗文网,抓包获取登录接口和form表单;
 5                    将验证码图片下载,输入验证码,加入form表单;
 6                    获取form表单所需参数;
 7                    带着form表单发送登录请求
 8                    注:需要建立会话'''
 9 
10 headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; Win64; x64) '
11                          'AppleWebKit/537.36 (KHTML, like Gecko) '
12                          'Chrome/73.0.3683.86 Safari/537.36'}
13 
14 def download_code(s):
15     #向登录界面发送请求
16     url = 'https://so.gushiwen.org/user/login.aspx?from='
17     r = s.get(url,headers=headers)
18 
19     #解析获取验证码图片链接
20     soup = BeautifulSoup(r.text,'lxml')
21     img_src = soup.find('img',id='imgCode')['src']
22     img_url = 'https://so.gushiwen.org' + img_src
23     print(img_url)
24 
25     #向图片链接发送请求,下载图片
26     r_img = s.get(img_url,headers=headers)
27     with open('img/code.png','wb') as fp:
28         fp.write(r_img.content)
29 
30     #查找form表单所需的两个参数
31     __VIEWSTATE = soup.find('input',id='__VIEWSTATE')['value']
32     __VIEWSTATEGENERATOR = soup.find('input',id='__VIEWSTATEGENERATOR')['value']
33 
34     return __VIEWSTATE,__VIEWSTATEGENERATOR
35 
36 def login(s,VIEW,VIEWG):
37     post_url = 'https://so.gushiwen.org/user/login.aspx?from='
38 
39     code = input('输入验证码:')
40 
41     form_data = {'__VIEWSTATE':VIEW,
42                 '__VIEWSTATEGENERATOR': VIEWG,
43                 'code':code,
44                 'denglu':'登录',
45                 'email':'18404904721',
46                 'from':'',
47                 'pwd':'gjp625262'}
48 
49     r = s.post(url=post_url,headers=headers,data=form_data)
50 
51     with open('gushi.html','w',encoding='utf8') as fp:
52         fp.write(r.text)
53 
54 def main():
55     #创建会话
56     s = requests.Session()
57 
58     #下载验证码
59     VIEW,VIEWG = download_code(s)
60 
61     #进行登录
62     login(s,VIEW,VIEWG)
63 
64 
65 if __name__ == '__main__':
66     main()

二、tesseract光学识别

from PIL import Image
import pytesseract

'''下载tesseract
    pip install pytesseract'''

#打开图片
img = Image.open(r'img/code.png')

#转化为灰度图片
img = img.convert('L')

#二值化处理
threshold = 140
table = []
for i in range(256):
    if i < threshold:
        table.append(0)
    else:
        table.append(1)
out = img.point(table,'1')
out.show()
img = img.convert('RGB')

#识别图片
print(pytesseract.image_to_string(img))

三、打码平台(云打码)

from YDMHTTPDemo3 import YDMHttp
'''打码平台:云打码
             打码兔'''

######################################################################

# 用户名
username    = 'mianxiang_mei'

# 密码
password    = 'gjp625262'

# 软件ID,开发者分成必要参数。登录开发者后台【我的软件】获得!
appid       = 8212

# 软件密钥,开发者分成必要参数。登录开发者后台【我的软件】获得!
appkey      = 'dbd2645a635701a0a9f19fd0072d82c3'

# 图片文件
filename    = 'img/code.png'

# 验证码类型,# 例:1004表示4位字母数字,不同类型收费不同。请准确填写,否则影响识别率。在此查询所有类型 http://www.yundama.com/price.html
codetype    = 1004

# 超时时间,秒
timeout     = 60

# 检查
if (username == 'username'):
    print('请设置好相关参数再测试')
else:
    # 初始化
    yundama = YDMHttp(username, password, appid, appkey)

    # 登陆云打码
    uid = yundama.login();
    print('uid: %s' % uid)

    # 查询余额
    balance = yundama.balance();
    print('balance: %s' % balance)

    # 开始识别,图片路径,验证码类型ID,超时时间(秒),识别结果
    cid, result = yundama.decode(filename, codetype, timeout);
    print('cid: %s, result: %s' % (cid, result))

######################################################################

附:云打码调用的类

import http.client, mimetypes, urllib, json, time, requests

######################################################################

class YDMHttp:

    apiurl = 'http://api.yundama.com/api.php'
    username = ''
    password = ''
    appid = ''
    appkey = ''

    def __init__(self, username, password, appid, appkey):
        self.username = username  
        self.password = password
        self.appid = str(appid)
        self.appkey = appkey

    def request(self, fields, files=[]):
        response = self.post_url(self.apiurl, fields, files)
        response = json.loads(response)
        return response
    
    def balance(self):
        data = {'method': 'balance', 'username': self.username, 'password': self.password, 'appid': self.appid, 'appkey': self.appkey}
        response = self.request(data)
        if (response):
            if (response['ret'] and response['ret'] < 0):
                return response['ret']
            else:
                return response['balance']
        else:
            return -9001
    
    def login(self):
        data = {'method': 'login', 'username': self.username, 'password': self.password, 'appid': self.appid, 'appkey': self.appkey}
        response = self.request(data)
        if (response):
            if (response['ret'] and response['ret'] < 0):
                return response['ret']
            else:
                return response['uid']
        else:
            return -9001

    def upload(self, filename, codetype, timeout):
        data = {'method': 'upload', 'username': self.username, 'password': self.password, 'appid': self.appid, 'appkey': self.appkey, 'codetype': str(codetype), 'timeout': str(timeout)}
        file = {'file': filename}
        response = self.request(data, file)
        if (response):
            if (response['ret'] and response['ret'] < 0):
                return response['ret']
            else:
                return response['cid']
        else:
            return -9001

    def result(self, cid):
        data = {'method': 'result', 'username': self.username, 'password': self.password, 'appid': self.appid, 'appkey': self.appkey, 'cid': str(cid)}
        response = self.request(data)
        return response and response['text'] or ''

    def decode(self, filename, codetype, timeout):
        cid = self.upload(filename, codetype, timeout)
        if (cid > 0):
            for i in range(0, timeout):
                result = self.result(cid)
                if (result != ''):
                    return cid, result
                else:
                    time.sleep(1)
            return -3003, ''
        else:
            return cid, ''

    def report(self, cid):
        data = {'method': 'report', 'username': self.username, 'password': self.password, 'appid': self.appid, 'appkey': self.appkey, 'cid': str(cid), 'flag': '0'}
        response = self.request(data)
        if (response):
            return response['ret']
        else:
            return -9001

    def post_url(self, url, fields, files=[]):
        for key in files:
            files[key] = open(files[key], 'rb');
        res = requests.post(url, files=files, data=fields)
        return res.text

 

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