Python_ Demo Login

How do I log in to know?

First of all to analyze, for the verification of the time, the server need us to submit what data, submit the address. A few login attempts first, through the browser in the network to view the data stream, the simulation login is required to provide 5 data, respectively, _XSRF, password, captcha_type, CAPTCHA, Phone_num, this is the mobile phone number to verify the login, Submit address Https://www.zhihu.com/login/phone_num, that, start to get these data, one of the image verification code is the most rare, through the third-party plug-in Zheye Verification code parsing, you can solve the problem

How to do?

1. Request to know the login page and resolve to get _XSRF value

2. Request the Verification code URL to get the captcha picture, turn a zheye to parse the result and stitch out the CAPTCHA value

3. Get the Captcha_type value from the verification submission form and get the form submission address

4. Captcha_type, password the user name and password

5. Submit the data, get the returned response, by judging whether the response data gets the login success

#!/usr/bin/python3import requestsimport reimport jsonfrom time import sleepfrom random import choice, Randintfrom zhihu_y Anzheng.zheye Import zheyeheaders = {' pragma ': ' no-cache ', ' Referer ': ' Https://www.zhihu.com/signin ', ' User-agen ' T ': ' mozilla/5.0 (Windows NT 10.0; Win64; x64) applewebkit/537.36 (khtml, like Gecko) chrome/59.0.3071.115 safari/537.36 '}# generate global Session Value session = Requests.session () def random_sleep (): # random pause, impersonate a person to access while choice ([0, 1]): Sleep (choice ([0.1, 0.2, 0.3, 0.4, 0. 5, 0.6, 0.7, 0.8]) def GET_XSRF (): "" "gets the value of the page _xsrf:p Aram URL:: return:" "" Zhihu_url = ' https://www.z Hihu.com/signin ' # Build mappings to increase the readability of the program Xsrf_value = 1 while true:random_sleep () resp = Session.get (Zhihu_url, headers=headers) # Check if return correct resp.raise_for_status () # set page encoding Resp.encod ing = resp.apparent_encoding # get _xsrfde value _xsrf = Re.match (R '. *name= "_XSRF" value= "(. *?)" ', Re.sub (R ' [\r\t\n] ', ' ', Resp.text '). Group (Xsrf_value) # guaranteed _XSRF data if _xsrf:break return _xsrfdef Get_img_dat        A (): "" "gets the picture and obtains the verification code data for the picture: return:" "While True:random_int = str (randint (1, POW (10, 13)))                # Get the value of the picture Img_url = ' HTTPS://WWW.ZHIHU.COM/CAPTCHA.GIF?R=%S&TYPE=LOGIN&LANG=CN '% random_int Random_sleep () # get Picture Img_resp = Session.get (Img_url, Headers=headers) with open (' zhihu_img.jpg ', ' WB ') as F:f.write (img_resp.content) # parse Picture z = Zheye () Img_yanzhe = Z.recognize (' zhihu_img. JPG ') # to sort the obtained coordinates by x [(48.647850377664284, 315.97586850515023), (49.944977855563351, 146.27730894630022)] Im G_yanzhe.sort (Key=lambda x:x[1]) # Knowing the location data submitted and Zheye parsing the data location instead, replace the data with the information required img_data = [] for y, x in img _yanzhe: # Zheye picture is 400*88 image number, the requirement is 200*44, all values are divided by 2 img_data.append ((X/2, Y/2)) # There is data representation parsing        Success, no data re-request data to parse againIf Img_data:break return img_datadef get_captcha_data (img_data): "" is formatted by string to get the desired captcha value "" "# Capt cha:{"Img_size": [200,44], "input_points": [[[120.375,34],[160.375,36]]} # First, second, third corresponding to number one, second, and third values, X, y corresponds to X. Y coordinate value first, second, third, x, y = 0, 1, 2, 0, 1 if len (img_data) = = 1:captcha = ' {' img_size ': [200,44], ' input _points ": [[%.2f,%.2f]]} '% (Img_data[first][x], img_data[first][y]) elif len (img_data) = = 2:c Aptcha = ' {' img_size ': [200,44], ' input_points ': [[%.2f,%.2f],[%.2f,%.2f]]} '% (Img_data[first][x], Img_dat A[first][y], img_data[second][x], img_data[second][y]) elif len (img_data) = = 2:captcha = ' {' img_size ': [200,44], "Input_points": [[%.2f,%.2f],[%.2f,%.2f],[%.2f,%.2f]]} '% (Img_data[first][x], img_data[first][y], Img_da TA[SECOND][X], Img_data[second][y], img_data[third][x], Img_data[third][y]) return captchadef get_form_data (): "" "gets The desired form data "" "_XSRF = get_XSRF () Img_data = Get_img_data () Captcha = Get_captcha_data (img_data) form_data = {' _xsrf ': _XSRF,    ' Password ': ' Password ', ' captcha_type ': ' cn ', ' Captcha ': captcha, ' phone_num ': ' Phone_num ',} Return form_datadef Go_login (post_url): "" "Submit form and get return value" "" From_data = Get_form_data () random_sleep () # Submit Validation Information, redirect Resp_yan = Session.post (Post_url, Headers=headers, Data=from_data, Allow_redirects=false) # Gets the value returned ResU lt = resp_yan.text return json.loads (result) if __name__ = = ' __main__ ': Post_url = ' Https://www.zhihu.com/login/phone _num ' result = Go_login (post_url) print (result)

　　

Python_ Demo Login