在许多情况下，reCAPTCHA V2 Callback会妨碍无障碍访问，使用户感到沮丧，限制对公开信息的访问，使应用程序和网站的测试变得困难。使用 reCAPTCHA V2 Callback 解算器可自动绕过这些障碍。
如果网站速度慢，请使用网站链接 2captcha.cn
reCAPTCHA V2 Callback 演示
本页介绍如何显示 reCAPTCHA V2 Callback 以及 reCAPTCHA V2 Callback 验证的工作原理。 在没有提交按钮时，需通过回调函数实现。该函数将在破解reCAPTCHA时执行。
如何破解reCAPTCHA V2回调
在浏览器中打开开发人员控制台，并找到带有
data-sitekey属性的元素。<div class="g-recaptcha" data-sitekey="6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u" id="recaptcha"></div>发送
sitekey和pageurl至我们的API.使用SDK（推荐）：
PHP
// https://github.com/2captcha/2captcha-php require(__DIR__ . '/../src/autoloader.php'); $solver = new \TwoCaptcha\TwoCaptcha('YOUR_API_KEY'); try { $result = $solver->recaptcha([ 'sitekey' => '6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u', 'url' => 'https://2captcha.com/demo/recaptcha-v2-callback', ]); } catch (\Exception $e) { die($e->getMessage()); } die('Captcha solved: ' . $result->code);Python
# https://github.com/2captcha/2captcha-python import sys import os sys.path.append(os.path.dirname(os.path.dirname(os.path.realpath(__file__)))) from twocaptcha import TwoCaptcha api_key = os.getenv('APIKEY_2CAPTCHA', 'YOUR_API_KEY') solver = TwoCaptcha(api_key) try: result = solver.recaptcha( sitekey='6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u', url='https://2captcha.com/demo/recaptcha-v2-callback') except Exception as e: sys.exit(e) else: sys.exit('solved: ' + str(result))Java
// https://github.com/2captcha/2captcha-java package examples; import com.twocaptcha.TwoCaptcha; import com.twocaptcha.captcha.reCAPTCHA; public class reCAPTCHAV2Example { public static void main(String[] args) { TwoCaptcha solver = new TwoCaptcha("YOUR_API_KEY"); ReCaptcha captcha = new ReCaptcha(); captcha.setSiteKey("6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u"); captcha.setUrl("https://2captcha.com/demo/recaptcha-v2-callback"); try { solver.solve(captcha); System.out.println("Captcha solved: " + captcha.getCode()); } catch (Exception e) { System.out.println("Error occurred: " + e.getMessage()); } } }C#
// https://github.com/2captcha/2captcha-csharp using System; using System.Linq; using TwoCaptcha.Captcha; namespace TwoCaptcha.Examples { public class reCAPTCHAV2Example { public void Main() { TwoCaptcha solver = new TwoCaptcha("YOUR_API_KEY"); ReCaptcha captcha = new ReCaptcha(); captcha.SetSiteKey("6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u"); captcha.SetUrl("https://2captcha.com/demo/recaptcha-v2-callback"); try { solver.Solve(captcha).Wait(); Console.WriteLine("Captcha solved: " + captcha.Code); } catch (AggregateException e) { Console.WriteLine("Error occurred: " + e.InnerExceptions.First().Message); } } } }Go
// https://github.com/2captcha/2captcha-go package main import ( "fmt" "log" "github.com/2captcha/2captcha-go" ) func main() { client := api2captcha.NewClient("API_KEY") captcha := api2captcha.ReCaptcha{ SiteKey: "6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u", Url: "https://2captcha.com/demo/recaptcha-v2-callback", } code, err := client.Solve(captcha.ToRequest()) if err != nil { log.Fatal(err); } fmt.Println("code "+code) }C++
// https://github.com/2captcha/2captcha-cpp #include <cstdio> #include "curl_http.hpp" #include "api2captcha.hpp" int main (int ac, char ** av) { api2captcha::curl_http_t http; http.set_verbose (true); api2captcha::client_t client; client.set_http_client (&http); client.set_api_key (API_KEY); api2captcha::recaptcha_t cap; cap.set_site_key ("6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u"); cap.set_url ("https://2captcha.com/demo/recaptcha-v2-callback"); try { client.solve (cap); printf ("code '%s'\n", cap.code ().c_str ()); } catch (std::exception & e) { fprintf (stderr, "Failed: %s\n", e.what ()); } return 0; }Ruby
# https://github.com/2captcha/2captcha-ruby require 'api_2captcha' client = Api2Captcha.new("YOUR_API_KEY") result = client.recaptcha_v2({ googlekey: '6Le-wvkSVVABCPBMRTvw0Q4Muexq1bi0DJwx_mJ-', pageurl: 'https://mysite.com/page/with/recaptcha_v2' })等待结果，结果可能如下所示：
03AGdBq27lvCYmKkaqDdxWLfMe3ovADGfGlSyiR-fN_EJrZGniTAmdH1XSjK8ralsctfjOLX2K0T7dJfxPqqga8dtSG2Lmns8Gk2ckcU6PQzUFieBqrtpkr5PPwnngew0Rnot2ik1y8m202u6pHTIquExlEYSlzS8vfoyPPt8fCf-Zrbu8vWkiY8Ogj17ommHMgkguZbmEyOdfLTXzhRko-a655_jJdCMjEtMxva-b78DnGlXu9d0o6vEmrw9n8ABu4lLsWnIbYPH0beXRRIkUE3si64Xhwkh1aO3L1HaIR3sfR0vOs3GV1OBzry_tFsZM0ZhSQovKJwjLlotrYajyTSRv3hgvXtLlLxXzbAwgeI91-wM7AFEte0uO_DhcNajxZr7E50wU9vuAe_drGWe4q-hNx4PQPenjaw手动操作：
发送GET或POST请求到我们的API URL:
https://2captcha.com/in.php，method设置为userrecaptcha，并提供上一步中找到的值作为googlekey的值，整页URL作为pageurl值。
请求示例：
GET https://2captcha.com/in.php?key=YOUR_API_KEY&method=userrecaptcha&googlekey=6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u&pageurl=http://2captcha.com/demo/recaptcha-v2-callback如果一切正常，服务器将返回您的captcha ID：
OK|2122988149
否则服务器将返回错误代码.15-20秒后发送GET请求以获取结果：
GET https://2captcha.com/res.php?key=YOUR_API_KEY&action=get&id=2122988149
如果captcha已破解，服务器将响应答案令牌：OK|03AHJ_Vuve5Asa4koK3KSMyUkCq0vUFCR5Im4CwB7PzO3dCxIo11i53epEraq-uBO5mVm2XRikL8iKOWr0aG50sCuej9bXx5qcviUGSm4iK4NC_Q88flavWhaTXSh0VxoihBwBjXxwXuJZ-WGN5Sy4dtUl2wbpMqAj8Zwup1vyCaQJWFvRjYGWJ_TQBKTXNB5CCOgncqLetmJ6B6Cos7qoQyaB8ZzBOTGf5KSP6e-K9niYs772f53Oof6aJeSUDNjiKG9gN3FTrdwKwdnAwEYX-F37sI_vLB1Zs8NQo0PObHYy0b0sf7WSLkzzcIgW9GR0FwcCCm1P8lB-50GQHPEBJUHNnhJyDzwRoRAkVzrf7UkV8wKCdTwrrWqiYDgbrzURfHc2ESsp020MicJTasSiXmNRgryt-gf50q5BMkiRH7osm4DoUgsjc_XyQiEmQmxl5sqZP7aKsaE-EM00x59XsPzD3m3YI6SRCFRUevSyumBd7KmXE8VuzIO9lgnnbka4-eZynZa6vbB9cO3QjLH0xSG3-egcplD1uLGh79wC34RF49Ui3eHwua4S9XHpH6YBe7gXzz6_mv-o-fxrOuphwfrtwvvi2FGfpTexWvxhqWICMFTTjFBCEGEgj7_IFWEKirXW2RTZCVF0Gid7EtIsoEeZkPbrcUISGmgtiJkJ_KojuKwImF0G0CsTlxYTOU2sPsd5o1JDt65wGniQR2IZufnPbbK76Yh_KI2DY4cUxMfcb2fAXcFMc9dcpHg6f9wBXhUtFYTu6pi5LhhGuhpkiGcv6vWYNxMrpWJW_pV7q8mPilwkAP-zw5MJxkgijl2wDMpM-UUQ_k37FVtf-ndbQAIPG7S469doZMmb5IZYgvcB4ojqCW3Vz6Q
如果captcha未破解，服务器将返回CAPCHA_NOT_READY结果。在5秒内重复您的请求。如果出现问题，服务器将返回错误代码.
在开发者控制台中，执行回调函数
verifyDemoRecaptcha，将令牌字符串作为参数传递，如下所示：verifyDemoRecaptcha('TOKEN')
请注意，每个网站都有专属reCAPTCHA植入方式，具有独特的回调定义，回调函数名称将与我们的演示不同，甚至使用匿名函数。 此代码段 可以帮助你找到回调定义。