使用Selenium+2Captcha自动化注册时reCAPTCHA验证失效求助

使用Selenium+undetected-chromedriver自动化CourseHero注册流程，通过2Captcha/azcaptcha获取reCAPTCHA解决方案后，手动设置g-recaptcha-response内容，但"Create my account"按钮始终处于禁用状态，必须手动完成验证才能激活按钮。

当前代码如下：

import time
import undetected_chromedriver as uc
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
import random
import string
import requests

register_url = 'https://www.coursehero.com/register'
api_key = 'APIKEY'  # Replace with your 2Captcha API key
success_combinations = []

# Generate a random email
def generate_random_email():
    random_string = ''.join(random.choices(string.ascii_lowercase, k=5))
    email = f"{random_string}@gmail.com"
    return email

# Generate a random password
def generate_random_password():
    random_password = ''.join(random.choices(string.ascii_letters + string.digits, k=8))
    return random_password

# Number of times to loop
num_iterations = 10

# Configure Selenium options
options = uc.ChromeOptions()
options.add_argument('--user-data-dir=C:/Users/willi/Downloads/coursehero/chrome')
options.add_argument('--profile-directory=ch')
options.add_argument("--start-maximized")
#options.add_argument(f'--proxy-server={proxy_url}')
#options.add_argument(f'--proxy-auth={proxy_username}:{proxy_password}')
# options.add_argument('--headless')  # Run Chrome in headless mode

# Create a new Chrome driver
driver = uc.Chrome(options=options)

# Perform registration and handle redirection
for _ in range(num_iterations):
    email = generate_random_email()
    password = generate_random_password()

    # Open the registration page
    driver.get(register_url)
    original_tab_handle = driver.current_window_handle
    driver.switch_to.window(original_tab_handle)
    WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.XPATH, '//button[text()="Sign up with email"]'))).click()

    # Wait for the CAPTCHA to load
    WebDriverWait(driver, 10).until(EC.frame_to_be_available_and_switch_to_it((By.TAG_NAME, "iframe")))

    # Get the CAPTCHA solution from 2Captcha
    captcha_params = {
        'key': api_key,
        'method': 'userrecaptcha',
        'googlekey': '6LeIuD4bAAAAAPcFHlgJrN8t44BjPiFWmns2-Dt3',  # Replace with the reCAPTCHA site key
        'pageurl': register_url,
    }

    captcha_response = requests.get('http://2captcha.com/in.php', params=captcha_params)
    captcha_id = captcha_response.text.split('|')[1]

    # Wait for the CAPTCHA to be solved
    captcha_solution = ''
    while not captcha_solution:
        captcha_result = requests.get(f'http://2captcha.com/res.php?key={api_key}&action=get&id={captcha_id}')
        if 'OK' in captcha_result.text:
            captcha_solution = captcha_result.text.split('|')[1]
            print(f"captcha Solved: {captcha_solution}")

    # Switch back to the default content
    driver.switch_to.default_content()

    # Fill in the registration form
    email_input = driver.find_element(By.ID, 'email')
    password_input = driver.find_element(By.ID, 'password')

    email_input.send_keys(email)
    password_input.send_keys(password)
    

    # Set the CAPTCHA solution using JavaScript
    recaptcha_response_element = driver.find_element(By.CSS_SELECTOR, 'textarea[id="g-recaptcha-response"]')
    driver.execute_script(f'arguments[0].innerHTML = "{captcha_solution}";', recaptcha_response_element)
    school_input = driver.find_element(By.ID, 'schoolSelection')
    school_input.send_keys('Warren High School')

    # Click on the school option
    WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.XPATH, '//span[contains(text(), "Warren High School")]'))).click()

    create_account_button = driver.find_element(By.XPATH, '//button[text()="Create my account"]')
    time.sleep(5)
    create_account_button.click()

    # Wait for redirection
    time.sleep(2)  # Adjust the delay if needed

    # Check if registration was successful
    if 'payment' in driver.current_url:
        # Registration was successful
        success_combinations.append((email, password))

# Save successful combinations to a text file
output_file = 'successful_combinations.txt'

with open(output_file, 'w') as file:
    for email, password in success_combinations:
        file.write(f"Email: {email}\tPassword: {password}\n")

print("Registration completed. Successful combinations saved to", output_file)

# Close the browser
driver.quit()

解决建议 #

1. 触发reCAPTCHA回调函数 #

直接修改g-recaptcha-response的内容后，必须调用Google reCAPTCHA的回调函数，网站才会识别验证完成。默认回调为grecaptcha.submit()，如果网站有自定义回调，可通过页面源码搜索data-callback属性获取：

# 替换原有的设置captcha代码
recaptcha_response_element = driver.find_element(By.CSS_SELECTOR, 'textarea[id="g-recaptcha-response"]')
# 先设置元素可见（默认隐藏）
driver.execute_script("arguments[0].style.display = 'block';", recaptcha_response_element)
# 设置value属性（而非innerHTML）
driver.execute_script(f'arguments[0].value = "{captcha_solution}";', recaptcha_response_element)
# 触发回调
driver.execute_script("grecaptcha.submit();")

2. 等待按钮状态更新 #

替换原有的time.sleep(5)+直接点击逻辑，等待按钮变为可点击状态后再操作：

WebDriverWait(driver, 15).until(
    EC.element_to_be_clickable((By.XPATH, '//button[text()="Create my account"]'))
).click()

3. 校验2Captcha参数 #

• 确认googlekey（sitekey）正确：通过页面源码搜索data-sitekey获取最新值，避免sitekey过期
• 确认pageurl与当前页面URL完全一致（注意是否有重定向后的URL）

4. 降低被检测风险 #

• 每次循环使用新的Chrome配置文件，避免固定profile被识别
• 添加随机延迟模拟人类操作（比如输入表单后等待1-3秒）
• 更新undetected-chromedriver到最新版本

内容的提问来源于stack exchange，提问作者Samurai6465