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摘要:
https://developers.google.com/recaptcha/?hl=zh-CN
Google reCAPTCHA 2 : Protect your site from spam and abuse
Google reCAPTCHA 2官方教程
https://support.google.com/recaptcha/?hl=zh-Hans#6223828
Content-Security-Policy (CSP)
Content-Security-Policy (CSP)
Frequently asked questions
What happens to reCAPTCHA v1?
Since we launched reCAPTCHA v2 in Dec, 2014, a significant number of
websites around the world have switched to it. Most of the human users
enjoy the No CAPTCHA reCAPTCHA experience with a si 阅读全文