什麼captcha爲Sinatra？

Question

您在Sinatra應用程序中使用了哪些驗證碼？

我喜歡谷歌的http://www.google.com/recaptcha，但它似乎不適用於Sinatra（然而，Rails有一個插件）。和谷歌搜索後，插件如https://github.com/jpoz/sinatra-recaptcha或https://github.com/bmizerany/sinatra-captcha似乎總是有5歲...

謝謝！

Answer 1

使用不帶任何插件的reCaptcha並不難。請參閱here for how to display reCaptcha without plugins和here for how to verify the user's answer。該API非常簡單。當用戶解決驗證碼時，將提交兩個參數：recaptcha_challenge_field和recaptcha_response_field。您可以使用它們從服務器調用驗證API，並檢查解決方案是否正常。例如：

require 'net/http' 
require 'json' 

post '/check_captcha' do 
    res = Net::HTTP.post_form(
    URI.parse('http://www.google.com/recaptcha/api/verify'), 
    { 
     'privatekey' => 'Your private key', 
     'remoteip' => request.ip, 
     'challenge' => params[:recaptcha_challenge_field], 
     'response' => params[:recaptcha_response_field] 
    } 
) 

    success, error_key = res.body.lines.map(&:chomp) 

    if success == 'true' 
    # solved the captcha 
    else 
    # did not solve the captcha 
    end 
end