驗證使用者回應('s)
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
本頁面說明如何從應用程式後端驗證使用者對 reCAPTCHA 驗證問題的回應。
對於網頁使用者,您可以透過下列其中一種方式取得使用者的回應憑證:
如果狀態傳回成功,Android 程式庫使用者可以呼叫 SafetyNetApi.RecaptchaTokenResult.getTokenResult() 方法來取得回應權杖。
符記限制
每個 reCAPTCHA 使用者回應權杖的有效期限為兩分鐘,且只能驗證一次,以防重播攻擊。如需新的權杖,您可以重新執行 reCAPTCHA 驗證。
取得回應權杖後,您必須在兩分鐘內,使用 reCAPTCHA 驗證
確認權杖有效。
API 要求
網址:https://www.google.com/recaptcha/api/siteverify
方法:POST
POST 參數 |
說明 |
secret |
必要欄位。網站和 reCAPTCHA 之間共用的金鑰。 |
response |
必要欄位。網站上 reCAPTCHA 用戶端整合功能提供的使用者回應權杖。 |
remoteip |
選用設定。使用者的 IP 位址。 |
API 回應
回應是 JSON 物件:
{
"success": true|false,
"challenge_ts": timestamp, // timestamp of the challenge load (ISO format yyyy-MM-dd'T'HH:mm:ssZZ)
"hostname": string, // the hostname of the site where the reCAPTCHA was solved
"error-codes": [...] // optional
}
針對 reCAPTCHA for Android:
{
"success": true|false,
"challenge_ts": timestamp, // timestamp of the challenge load (ISO format yyyy-MM-dd'T'HH:mm:ssZZ)
"apk_package_name": string, // the package name of the app where the reCAPTCHA was solved
"error-codes": [...] // optional
}
錯誤代碼參考資料
錯誤代碼 |
說明 |
missing-input-secret |
缺少密碼參數。 |
invalid-input-secret |
密鑰參數無效或格式錯誤。 |
missing-input-response |
找不到回應參數。 |
invalid-input-response |
回應參數無效或格式錯誤。 |
bad-request |
要求無效或格式錯誤。 |
timeout-or-duplicate |
回應無效:回應過舊或已使用過。 |
除非另有註明,否則本頁面中的內容是採用創用 CC 姓名標示 4.0 授權,程式碼範例則為阿帕契 2.0 授權。詳情請參閱《Google Developers 網站政策》。Java 是 Oracle 和/或其關聯企業的註冊商標。
上次更新時間:2025-07-25 (世界標準時間)。
[null,null,["上次更新時間:2025-07-25 (世界標準時間)。"],[[["\u003cp\u003eThis page details how to verify if a user successfully completed a reCAPTCHA challenge on your website or Android app.\u003c/p\u003e\n"],["\u003cp\u003eYou'll receive a response token from the reCAPTCHA integration that needs to be verified within two minutes using the reCAPTCHA API.\u003c/p\u003e\n"],["\u003cp\u003eVerification involves sending a POST request to the reCAPTCHA API with the secret key, response token, and optionally, the user's IP address.\u003c/p\u003e\n"],["\u003cp\u003eThe API response is a JSON object indicating success or failure, along with details like timestamp and potential error codes.\u003c/p\u003e\n"],["\u003cp\u003eEach response token is valid for a single use and expires after two minutes to prevent replay attacks.\u003c/p\u003e\n"]]],["To verify a user's reCAPTCHA response, obtain the response token via the `g-recaptcha-response` parameter, `grecaptcha.getResponse()`, or a callback function for web users or the `SafetyNetApi.RecaptchaTokenResult.getTokenResult()` method for Android. Then, within two minutes, send a POST request to `https://www.google.com/recaptcha/api/siteverify` with `secret` (your site's key) and `response` (the user token). The optional `remoteip` can be included. The JSON response indicates success, timestamp, and hostname or `apk_package_name` if Android, and error codes if any.\n"],null,["# Verifying the user's response\n\nThis page explains how to verify a user's response to a reCAPTCHA challenge from your application's\nbackend.\n\nFor web users, you can get the user's response token in one of three ways:\n\n- `g-recaptcha-response` POST parameter when the user submits the form on your site\n- [`grecaptcha.getResponse(opt_widget_id)`](/recaptcha/docs/display#js_api) after the user completes the reCAPTCHA challenge\n- As a string argument to your [callback function](/recaptcha/docs/display#render_param) if `data-callback` is specified in either the `g-recaptcha` tag attribute or the callback parameter in the `grecaptcha.render` method\n\nFor Android library users, you can call the\n[SafetyNetApi.RecaptchaTokenResult.getTokenResult()](https://developers.google.com/android/reference/com/google/android/gms/safetynet/SafetyNetApi.RecaptchaTokenResult.html#getTokenResult())\nmethod to get response token if the status returns successful.\n\nToken Restrictions\n------------------\n\nEach reCAPTCHA user response token is valid for two minutes, and can only be verified *once* to\nprevent replay attacks. If you need a new token, you can re-run the reCAPTCHA verification.\n\nAfter you get the response token, you need to verify it within two minutes with reCAPTCHA using the\nfollowing API to ensure the token is valid.\n\nAPI Request\n-----------\n\nURL: `https://www.google.com/recaptcha/api/siteverify`\n\nMETHOD: `POST`\n\n| POST Parameter | Description |\n|----------------|---------------------------------------------------------------------------------------------------|\n| `secret` | Required. The shared key between your site and reCAPTCHA. |\n| `response` | Required. The user response token provided by the reCAPTCHA client-side integration on your site. |\n| `remoteip` | Optional. The user's IP address. |\n\nAPI Response\n------------\n\nThe response is a JSON object: \n\n {\n \"success\": true|false,\n \"challenge_ts\": timestamp, // timestamp of the challenge load (ISO format yyyy-MM-dd'T'HH:mm:ssZZ)\n \"hostname\": string, // the hostname of the site where the reCAPTCHA was solved\n \"error-codes\": [...] // optional\n }\n\nFor reCAPTCHA Android: \n\n {\n \"success\": true|false,\n \"challenge_ts\": timestamp, // timestamp of the challenge load (ISO format yyyy-MM-dd'T'HH:mm:ssZZ)\n \"apk_package_name\": string, // the package name of the app where the reCAPTCHA was solved\n \"error-codes\": [...] // optional\n }\n\n### Error code reference\n\n| Error code | Description |\n|--------------------------|---------------------------------------------------------------------------------|\n| `missing-input-secret` | The secret parameter is missing. |\n| `invalid-input-secret` | The secret parameter is invalid or malformed. |\n| `missing-input-response` | The response parameter is missing. |\n| `invalid-input-response` | The response parameter is invalid or malformed. |\n| `bad-request` | The request is invalid or malformed. |\n| `timeout-or-duplicate` | The response is no longer valid: either is too old or has been used previously. |"]]