python爬蟲之驗證碼識別
- 2019 年 10 月 10 日
- 筆記
版權聲明：本文為博主原創文章，遵循 CC 4.0 BY-SA 版權協議，轉載請附上原文出處鏈接和本聲明。
本文鏈接：https://blog.csdn.net/weixin_40313634/article/details/84574797
環境：
- subline: https://download.sublimetext.com/Sublime Text Build 3176 x64 Setup.exe
- python: https://www.python.org/ftp/python/3.7.0/python-3.7.0-amd64.exe
- OCR識別庫工具：https://digi.bib.uni-mannheim.de/tesseract/tesseract-ocr-setup-3.05.01.exe
- 圖形驗證碼：https://github.com/Python3WebSpider/CrackImageCode/archive/master.zip
- 滑動驗證碼：https://github.com/Python3WebSpider/CrackGeetest/archive/master.zip 平台：https://passport.cnblogs.com/user/signin 例子：https://www.cnblogs.com/moning/p/8318475.html
import tesserocr from PIL import Image
image = Image.open(『code2.jpg』)
image = image.convert(『L』) threshold = 127 table = [] for i in range(256): if i < threshold: table.append(0) else: table.append(1)
image = image.point(table, 『1』) image.show()
result = tesserocr.image_to_text(image) print(result)
import time from io import BytesIO from PIL import Image from selenium import webdriver from selenium.webdriver import ActionChains from selenium.webdriver.common.by import By from selenium.webdriver.support.ui import WebDriverWait from selenium.webdriver.support import expected_conditions as EC
EMAIL = 『[email protected]』 PASSWORD = 『』 BORDER = 6 INIT_LEFT = 60
class CrackGeetest(): def init(self): self.url = 『https://account.geetest.com/login』 self.browser = webdriver.Chrome() self.wait = WebDriverWait(self.browser, 20) self.email = EMAIL self.password = PASSWORD
def __del__(self): self.browser.close() def get_geetest_button(self): """ 獲取初始驗證按鈕 :return: """ button = self.wait.until(EC.element_to_be_clickable((By.CLASS_NAME, 'geetest_radar_tip'))) return button def get_position(self): """ 獲取驗證碼位置 :return: 驗證碼位置元組 """ img = self.wait.until(EC.presence_of_element_located((By.CLASS_NAME, 'geetest_canvas_img'))) time.sleep(2) location = img.location size = img.size top, bottom, left, right = location['y'], location['y'] + size['height'], location['x'], location['x'] + size[ 'width'] return (top, bottom, left, right) def get_screenshot(self): """ 獲取網頁截圖 :return: 截圖對象 """ screenshot = self.browser.get_screenshot_as_png() screenshot = Image.open(BytesIO(screenshot)) return screenshot def get_slider(self): """ 獲取滑塊 :return: 滑塊對象 """ slider = self.wait.until(EC.element_to_be_clickable((By.CLASS_NAME, 'geetest_slider_button'))) return slider def get_geetest_image(self, name='captcha.png'): """ 獲取驗證碼圖片 :return: 圖片對象 """ top, bottom, left, right = self.get_position() print('驗證碼位置', top, bottom, left, right) screenshot = self.get_screenshot() captcha = screenshot.crop((left, top, right, bottom)) captcha.save(name) return captcha def open(self): """ 打開網頁輸入用戶名密碼 :return: None """ self.browser.get(self.url) email = self.wait.until(EC.presence_of_element_located((By.ID, 'email'))) password = self.wait.until(EC.presence_of_element_located((By.ID, 'password'))) email.send_keys(self.email) password.send_keys(self.password) def get_gap(self, image1, image2): """ 獲取缺口偏移量 :param image1: 不帶缺口圖片 :param image2: 帶缺口圖片 :return: """ left = 60 for i in range(left, image1.size[0]): for j in range(image1.size[1]): if not self.is_pixel_equal(image1, image2, i, j): left = i return left return left def is_pixel_equal(self, image1, image2, x, y): """ 判斷兩個像素是否相同 :param image1: 圖片1 :param image2: 圖片2 :param x: 位置x :param y: 位置y :return: 像素是否相同 """ # 取兩個圖片的像素點 pixel1 = image1.load()[x, y] pixel2 = image2.load()[x, y] threshold = 60 if abs(pixel1[0] - pixel2[0]) < threshold and abs(pixel1[1] - pixel2[1]) < threshold and abs( pixel1[2] - pixel2[2]) < threshold: return True else: return False def get_track(self, distance): """ 根據偏移量獲取移動軌跡 :param distance: 偏移量 :return: 移動軌跡 """ # 移動軌跡 track = [] # 當前位移 current = 0 # 減速閾值 mid = distance * 4 / 5 # 計算間隔 t = 0.2 # 初速度 v = 0 while current < distance: if current < mid: # 加速度為正2 a = 2 else: # 加速度為負3 a = -3 # 初速度v0 v0 = v # 當前速度v = v0 + at v = v0 + a * t # 移動距離x = v0t + 1/2 * a * t^2 move = v0 * t + 1 / 2 * a * t * t # 當前位移 current += move # 加入軌跡 track.append(round(move)) return track def move_to_gap(self, slider, track): """ 拖動滑塊到缺口處 :param slider: 滑塊 :param track: 軌跡 :return: """ ActionChains(self.browser).click_and_hold(slider).perform() for x in track: ActionChains(self.browser).move_by_offset(xoffset=x, yoffset=0).perform() time.sleep(0.5) ActionChains(self.browser).release().perform() def login(self): """ 登錄 :return: None """ submit = self.wait.until(EC.element_to_be_clickable((By.CLASS_NAME, 'login-btn'))) submit.click() time.sleep(10) print('登錄成功') def crack(self): # 輸入用戶名密碼 self.open() # 點擊驗證按鈕 button = self.get_geetest_button() button.click() # 獲取驗證碼圖片 image1 = self.get_geetest_image('captcha1.png') # 點按呼出缺口 slider = self.get_slider() slider.click() # 獲取帶缺口的驗證碼圖片 image2 = self.get_geetest_image('captcha2.png') # 獲取缺口位置 gap = self.get_gap(image1, image2) print('缺口位置', gap) # 減去缺口位移 gap -= BORDER # 獲取移動軌跡 track = self.get_track(gap) print('滑動軌跡', track) # 拖動滑塊 self.move_to_gap(slider, track) success = self.wait.until( EC.text_to_be_present_in_element((By.CLASS_NAME, 'geetest_success_radar_tip_content'), '驗證成功')) print(success) # 失敗後重試 if not success: self.crack() else: self.login()
if name == 『main』: crack = CrackGeetest() crack.crack()
