Créer des évaluations pour des applications mobiles

Cette page explique comment créer une évaluation pour permettre à votre backend de vérifier l'authenticité du jeton envoyé par reCAPTCHA. reCAPTCHA envoie une réponse chiffrée, le jeton de réponse reCAPTCHA, lorsque l'utilisateur final déclenche une action.

Vous devez créer une évaluation pour évaluer les résultats de execute() dans votre backend en envoyant le jeton généré au point de terminaison d'évaluation. reCAPTCHA traite le jeton envoyé, et indique sa validité et son score.

Les 10 000 évaluations reCAPTCHA mensuelles sont gratuites. Pour continuer à créer des évaluations après avoir atteint la limite d'utilisation mensuelle gratuite (10 000 évaluations par mois), vous devez activer la facturation pour votre projet Google Cloud. Pour en savoir plus sur la facturation de reCAPTCHA, consultez la section Informations de facturation.

Avant de commencer

  1. Préparez votre environnement pour reCAPTCHA.
  2. Assurez-vous de disposer du rôle IAM (Identity and Access Management) suivant : Agent reCAPTCHA Enterprise (roles/recaptchaenterprise.agent).
  3. Installez des clés basées sur des scores dans votre application iOS ou dans votre application Android.
  4. Configurez l'authentification auprès de reCAPTCHA.

    La méthode d'authentification que vous choisissez dépend de l'environnement dans lequel reCAPTCHA est configuré. Le tableau suivant vous aide à choisir la méthode d'authentification appropriée et l'interface compatible pour configurer l'authentification:

    Environnement Interface Méthode d'authentification
    Google Cloud
    • REST
    • Bibliothèques clientes
    		 Utilisez des comptes de service associés.
    Sur site ou chez un autre fournisseur cloud REST Utilisez des clés API ou la fédération d'identité de charge de travail.

    Si vous souhaitez utiliser des clés API, nous vous recommandons de les sécuriser en appliquant des restrictions de clé API.
    Bibliothèques clientes

    Utilisez les ressources suivantes :

Récupérer un jeton

Récupérez un jeton à partir de la réponse de l'appel execute().

Vous ne pouvez accéder au jeton de chaque utilisateur qu'une seule fois. Si vous devez évaluer une action ultérieure qu'un utilisateur entreprend dans votre application mobile, ou si un jeton expire avant la création d'une évaluation, vous devez appeler à nouveau execute() pour générer un nouveau jeton.

Créer une évaluation

Après avoir configuré l'authentification, créez une évaluation en envoyant une requête à l'API reCAPTCHA Enterprise ou en utilisant les bibliothèques clientes reCAPTCHA.

Pour améliorer la détection, nous vous recommandons de transmettre les valeurs supplémentaires suivantes lorsque vous créez des évaluations:

  • userAgent: l'user-agent est inclus dans la requête HTTP dans l'en-tête de requête. Pour en savoir plus, consultez En savoir plus sur l'en-tête de requête User-Agent dans la documentation Mozilla Developer Network.
  • userIpAddress: l'adresse IP de l'utilisateur qui envoie une requête à votre backend est disponible dans la requête HTTP. Si vous utilisez un serveur proxy, l'adresse IP est disponible dans l'en-tête de requête X-Forwarded-For. Pour en savoir plus sur l'obtention de l'adresse IP, consultez X-Forwarded-For.
  • ja3: JA3 est une méthode open source permettant d'identifier les clients TLS. Pour en savoir plus sur l'utilisation de JA3 pour créer une empreinte TLS, consultez la documentation JA3, .

Cela permet de protéger votre site Web et vos applications mobiles contre les modèles d'attaque avancés et les utilisations abusives humaines.

API REST

Créez une évaluation en envoyant une requête à l'API reCAPTCHA. Vous pouvez utiliser gcloud CLI ou la clé API pour l'authentification.

Utiliser la CLI gcloud

Créez une évaluation à l'aide de la méthode projects.assessments.create. Envoyez cette requête au point de terminaison de l'API v1.

Avant d'utiliser les données de requête ci-dessous, effectuez les remplacements suivants :

  • PROJECT_ID : ID de votre projet Google Cloud
  • TOKEN : jeton renvoyé par l'appel grecaptcha.enterprise.execute()
  • KEY_ID: clé reCAPTCHA associée au site ou à l'application. Pour en savoir plus, consultez la page Clés reCAPTCHA.
  • USER_AGENT: user-agent dans la requête de l'appareil de l'utilisateur.
  • USER_IP_ADDRESS: adresse IP de la requête provenant de l'appareil de l'utilisateur.
  • JA3: empreinte JA3 du client SSL. Nous vous recommandons d'utiliser salesforce/ja3 pour calculer JA3.
  • USER_ACTION: action initiée par l'utilisateur que vous avez spécifiée pour action dans l'appel grecaptcha.enterprise.execute(), telle que login.

    Pour en savoir plus, consultez la section Noms des actions.

Méthode HTTP et URL :

POST https://recaptchaenterprise.googleapis.com/v1/projects/PROJECT_ID/assessments

Corps JSON de la requête : 

{
  "event": {
    "token": "TOKEN",
    "siteKey": "KEY_ID",
    "userAgent": "USER_AGENT",
    "userIpAddress": "USER_IP_ADDRESS",
    "ja3": "JA3",
    "expectedAction": "USER_ACTION"
  }
}

Pour envoyer votre requête, choisissez l'une des options suivantes :

curl

Enregistrez le corps de la requête dans un fichier nommé request.json, puis exécutez la commande suivante :

curl -X POST \
     -H "Authorization: Bearer $(gcloud auth print-access-token)" \
     -H "Content-Type: application/json; charset=utf-8" \
     -d @request.json \
     "https://recaptchaenterprise.googleapis.com/v1/projects/PROJECT_ID/assessments"

PowerShell

Enregistrez le corps de la requête dans un fichier nommé request.json, puis exécutez la commande suivante :

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
    -Method POST `
    -Headers $headers `
    -ContentType: "application/json; charset=utf-8" `
    -InFile request.json `
    -Uri "https://recaptchaenterprise.googleapis.com/v1/projects/PROJECT_ID/assessments" | Select-Object -Expand Content

Vous devriez recevoir une réponse JSON de ce type :

{
  "tokenProperties": {
    "valid": true,
    "com.example.app" or "iosBundleId": "com.example.app",
    "action": "homepage",
    "createTime": "2019-03-28T12:24:17.894Z"
   },
  "riskAnalysis": {
    "score": 0.1,
    "reasons": ["AUTOMATION"]
  },
 "event": {
    "token": "TOKEN",
    "siteKey": "KEY_ID",
    "userAgent": "USER_AGENT",
    "userIpAddress": "USER_IP_ADDRESS",
    "ja3": "JA3",
    "expectedAction": "USER_ACTION"
  },
  "name": "projects/PROJECT_NUMBER/assessments/b6ac310000000000"
}

Nous vous recommandons d'utiliser des analyseurs JSON en mode d'analyse non stricte pour éviter toute interruption si des champs supplémentaires sont ajoutés à la réponse JSON.

Utiliser une clé API

Créez une évaluation à l'aide de la méthode projects.assessments.create. Envoyez cette requête au point de terminaison de l'API v1.

Avant d'utiliser les données de requête ci-dessous, effectuez les remplacements suivants :

  • API_KEY : clé API associée au projet en cours
  • PROJECT_ID : ID de votre projet Google Cloud
  • TOKEN : jeton renvoyé par l'appel grecaptcha.enterprise.execute()
  • KEY_ID: clé reCAPTCHA associée au site ou à l'application. Pour en savoir plus, consultez la page Clés reCAPTCHA.
  • USER_AGENT: user-agent dans la requête de l'appareil de l'utilisateur.
  • USER_IP_ADDRESS: adresse IP de la requête provenant de l'appareil de l'utilisateur.
  • JA3: empreinte JA3 du client SSL. Nous vous recommandons d'utiliser salesforce/ja3 pour calculer JA3.
  • USER_ACTION: action initiée par l'utilisateur que vous avez spécifiée pour action dans l'appel grecaptcha.enterprise.execute(), telle que login.

    Pour en savoir plus, consultez la section Noms des actions.

Méthode HTTP et URL :

POST https://recaptchaenterprise.googleapis.com/v1/projects/PROJECT_ID/assessments?key=API_KEY

Corps JSON de la requête : 

{
  "event": {
    "token": "TOKEN",
    "siteKey": "KEY_ID",
    "userAgent": "USER_AGENT",
    "userIpAddress": "USER_IP_ADDRESS",
    "ja3": "JA3",
    "expectedAction": "USER_ACTION"
  }
}

Pour envoyer votre requête, choisissez l'une des options suivantes :

curl

Enregistrez le corps de la requête dans un fichier nommé request.json, puis exécutez la commande suivante :

curl -X POST \
     -H "Content-Type: application/json; charset=utf-8" \
     -d @request.json \
     "https://recaptchaenterprise.googleapis.com/v1/projects/PROJECT_ID/assessments?key=API_KEY"

PowerShell

Enregistrez le corps de la requête dans un fichier nommé request.json, puis exécutez la commande suivante :

$headers = @{  }

Invoke-WebRequest `
    -Method POST `
    -Headers $headers `
    -ContentType: "application/json; charset=utf-8" `
    -InFile request.json `
    -Uri "https://recaptchaenterprise.googleapis.com/v1/projects/PROJECT_ID/assessments?key=API_KEY" | Select-Object -Expand Content

Vous devriez recevoir une réponse JSON de ce type :

{
  "tokenProperties": {
    "valid": true,
    "hostname": "www.google.com",
    "action": "homepage",
    "createTime": "2019-03-28T12:24:17.894Z"
   },
  "riskAnalysis": {
    "score": 0.1,
    "reasons": ["AUTOMATION"]
  },
  "event": {
    "token": "TOKEN",
    "siteKey": "KEY_ID",
    "userAgent": "USER_AGENT",
    "userIpAddress": "USER_IP_ADDRESS",
    "ja3": "JA3",
    "expectedAction": "USER_ACTION"
  },
  "name": "projects/PROJECT_NUMBER/assessments/b6ac310000000000"
}

Nous vous recommandons d'utiliser des analyseurs JSON en mode d'analyse non stricte pour éviter toute interruption si des champs supplémentaires sont ajoutés à la réponse JSON.

C#

  using System;
  using Google.Api.Gax.ResourceNames;
  using Google.Cloud.RecaptchaEnterprise.V1;

  public class CreateAssessmentSample
  {
      // Create an assessment to analyze the risk of a UI action.
      // projectID: Google Cloud project ID.
      // recaptchaKey: reCAPTCHA key obtained by registering a domain or an app to use reCAPTCHA Enterprise.
      // token: The token obtained from the client on passing the recaptchaKey.
      // recaptchaAction: Action name corresponding to the token.
      public void createAssessment(string projectID = "project-id", string recaptchaKey = "recaptcha-key",
          string token = "action-token", string recaptchaAction = "action-name")
      {

          // Create the client.
          // TODO: To avoid memory issues, move this client generation outside
          // of this example, and cache it (recommended) or call client.close()
          // before exiting this method.
          RecaptchaEnterpriseServiceClient client = RecaptchaEnterpriseServiceClient.Create();

          ProjectName projectName = new ProjectName(projectID);

          // Build the assessment request.
          CreateAssessmentRequest createAssessmentRequest = new CreateAssessmentRequest()
          {
              Assessment = new Assessment()
              {
                  // Set the properties of the event to be tracked.
                  Event = new Event()
                  {
                      SiteKey = recaptchaKey,
                      Token = token,
                      ExpectedAction = recaptchaAction
                  },
              },
              ParentAsProjectName = projectName
          };

          Assessment response = client.CreateAssessment(createAssessmentRequest);

          // Check if the token is valid.
          if (response.TokenProperties.Valid == false)
          {
              System.Console.WriteLine("The CreateAssessment call failed because the token was: " +
                  response.TokenProperties.InvalidReason.ToString());
              return;
          }

          // Check if the expected action was executed.
          if (response.TokenProperties.Action != recaptchaAction)
          {
              System.Console.WriteLine("The action attribute in reCAPTCHA tag is: " +
                  response.TokenProperties.Action.ToString());
              System.Console.WriteLine("The action attribute in the reCAPTCHA tag does not " +
                  "match the action you are expecting to score");
              return;
          }

          // Get the risk score and the reasons.
          // For more information on interpreting the assessment,
          // see: https://cloud.google.com/recaptcha/docs/interpret-assessment
          System.Console.WriteLine("The reCAPTCHA score is: " + ((decimal)response.RiskAnalysis.Score));

          foreach (RiskAnalysis.Types.ClassificationReason reason in response.RiskAnalysis.Reasons)
          {
              System.Console.WriteLine(reason.ToString());
          }
      }

      public static void Main(string[] args)
      {
          new CreateAssessmentSample().createAssessment();
      }
  }

Go

  import (
    "context"
    "fmt"

    recaptcha "cloud.google.com/go/recaptchaenterprise/v2/apiv1"
    recaptchapb "cloud.google.com/go/recaptchaenterprise/v2/apiv1/recaptchaenterprisepb"
  )

  func main() {
    // TODO(developer): Replace these variables before running the sample.
    projectID := "project-id"
    recaptchaKey := "recaptcha-key"
    token := "action-token"
    recaptchaAction := "action-name"

    createAssessment(projectID, recaptchaKey, token, recaptchaAction)
  }

  /**
  * Create an assessment to analyze the risk of a UI action.
  *
  * @param projectID: Google Cloud project ID
  * @param recaptchaKey: reCAPTCHA key obtained by registering a domain or an app to use the services of reCAPTCHA Enterprise.
  * @param token: The token obtained from the client on passing the recaptchaKey.
  * @param recaptchaAction: Action name corresponding to the token.
  */
  func createAssessment(projectID string, recaptchaKey string, token string, recaptchaAction string) {

    // Create the recaptcha client.
    // TODO: To avoid memory issues, move this client generation outside
    // of this example, and cache it (recommended) or call client.close()
    // before exiting this method.
    ctx := context.Background()
    client, err := recaptcha.NewClient(ctx)
    if err != nil {
      fmt.Printf("Error creating reCAPTCHA client\n")
    }
    defer client.Close()

    // Set the properties of the event to be tracked.
    event := &recaptchapb.Event{
      Token:          token,
      SiteKey:        recaptchaKey,
    }

    assessment := &recaptchapb.Assessment{
      Event: event,
    }

    // Build the assessment request.
    request := &recaptchapb.CreateAssessmentRequest{
      Assessment: assessment,
      Parent:     fmt.Sprintf("projects/%s", projectID),
    }

    response, err := client.CreateAssessment(
      ctx,
      request)

    if err != nil {
      fmt.Printf("%v", err.Error())
    }

    // Check if the token is valid.
    if response.TokenProperties.Valid == false {
      fmt.Printf("The CreateAssessment() call failed because the token"+
         " was invalid for the following reasons: %v",
      response.TokenProperties.InvalidReason)
      return
    }

    // Check if the expected action was executed.
    if response.TokenProperties.Action == recaptchaAction {
      // Get the risk score and the reason(s).
      // For more information on interpreting the assessment,
      // see: https://cloud.google.com/recaptcha/docs/interpret-assessment
      fmt.Printf("The reCAPTCHA score for this token is:  %v",
        response.RiskAnalysis.Score)

      for _,reason := range response.RiskAnalysis.Reasons {
        fmt.Printf(reason.String()+"\n")
      }
      return
    }

    fmt.Printf("The action attribute in your reCAPTCHA tag does " +
        "not match the action you are expecting to score")
  }

Java


import com.google.cloud.recaptchaenterprise.v1.RecaptchaEnterpriseServiceClient;
import com.google.recaptchaenterprise.v1.Assessment;
import com.google.recaptchaenterprise.v1.CreateAssessmentRequest;
import com.google.recaptchaenterprise.v1.Event;
import com.google.recaptchaenterprise.v1.ProjectName;
import com.google.recaptchaenterprise.v1.RiskAnalysis.ClassificationReason;
import java.io.IOException;

public class CreateAssessment {

  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace these variables before running the sample.
    String projectID = "project-id";
    String recaptchaSiteKey = "recaptcha-site-key";
    String token = "action-token";
    String recaptchaAction = "action-name";
    String userIpAddress = "user-ip-address";
    String userAgent = "user-agent";
    String ja3 = "ja3"

    createAssessment(projectID, recaptchaSiteKey, token, recaptchaAction, userIpAddress, userAgent, ja3);
  }

  /**
   * Create an assessment to analyze the risk of an UI action. Assessment approach is the same for
   * both 'score' and 'checkbox' type recaptcha site keys.
   *
   * @param projectID : GCloud Project ID
   * @param recaptchaSiteKey : Site key obtained by registering a domain/app to use recaptcha
   *     services. (score/ checkbox type)
   * @param token : The token obtained from the client on passing the recaptchaSiteKey.
   * @param recaptchaAction : Action name corresponding to the token.
   * @param userIpAddress: IP address of the user sending a request.
   * @param userAgent: User agent is included in the HTTP request in the request header. 
   * @param ja3: JA3 associated with the request.
   */
  public static void createAssessment(
      String projectID, String recaptchaSiteKey, String token, String recaptchaAction, String userIpAddress, String userAgent, String ja3)
      throws IOException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the `client.close()` method on the client to safely
    // clean up any remaining background resources.
    try (RecaptchaEnterpriseServiceClient client = RecaptchaEnterpriseServiceClient.create()) {

      // Set the properties of the event to be tracked.
      Event event = Event.newBuilder()
          .setSiteKey(recaptchaSiteKey)
          .setToken(token)
          .setUserIpAddress(userIpAddress)
          .setJa3(ja3)
          .setUserAgent(userAgent)
          .build();

      // Build the assessment request.
      CreateAssessmentRequest createAssessmentRequest =
          CreateAssessmentRequest.newBuilder()
              .setParent(ProjectName.of(projectID).toString())
              .setAssessment(Assessment.newBuilder().setEvent(event).build())
              .build();

      Assessment response = client.createAssessment(createAssessmentRequest);

      // Check if the token is valid.
      if (!response.getTokenProperties().getValid()) {
        System.out.println(
            "The CreateAssessment call failed because the token was: "
                + response.getTokenProperties().getInvalidReason().name());
        return;
      }

      // Check if the expected action was executed.
      // (If the key is checkbox type and 'action' attribute wasn't set, skip this check.)
      if (!response.getTokenProperties().getAction().equals(recaptchaAction)) {
        System.out.println(
            "The action attribute in reCAPTCHA tag is: "
                + response.getTokenProperties().getAction());
        System.out.println(
            "The action attribute in the reCAPTCHA tag "
                + "does not match the action ("
                + recaptchaAction
                + ") you are expecting to score");
        return;
      }

      // Get the reason(s) and the risk score.
      // For more information on interpreting the assessment,
      // see: https://cloud.google.com/recaptcha-enterprise/docs/interpret-assessment
      for (ClassificationReason reason : response.getRiskAnalysis().getReasonsList()) {
        System.out.println(reason);
      }

      float recaptchaScore = response.getRiskAnalysis().getScore();
      System.out.println("The reCAPTCHA score is: " + recaptchaScore);

      // Get the assessment name (id). Use this to annotate the assessment.
      String assessmentName = response.getName();
      System.out.println(
          "Assessment name: " + assessmentName.substring(assessmentName.lastIndexOf("/") + 1));
    }
  }
}

Node.js

  const {RecaptchaEnterpriseServiceClient} =
      require('@google-cloud/recaptcha-enterprise');

 /**
 * Create an assessment to analyze the risk of a UI action. Note that
 * this example does set error boundaries and returns `null` for
 * exceptions.
 *
 * projectID: Google Cloud project ID
 * recaptchaKey: reCAPTCHA key obtained by registering a domain or an app to use the services of reCAPTCHA Enterprise.
 * token: The token obtained from the client on passing the recaptchaKey.
 * recaptchaAction: Action name corresponding to the token.
 * userIpAddress: The IP address of the user sending a request to your backend is available in the HTTP request.
 * userAgent: The user agent is included in the HTTP request in the request header.
 * ja3: JA3 associated with the request.
 */
 async function createAssessment({
   projectID = "your-project-id",
   recaptchaKey = "your-recaptcha-key",
   token = "action-token",
   recaptchaAction = "action-name",
   userIpAddress = "user-ip-address",
   userAgent = "user-agent",
   ja3 = "ja3"
 }) {
   // Create the reCAPTCHA client & set the project path. There are multiple
   // ways to authenticate your client. For more information see:
   // https://cloud.google.com/docs/authentication
   // TODO: To avoid memory issues, move this client generation outside
   // of this example, and cache it (recommended) or call client.close()
   // before exiting this method.
   const client = new RecaptchaEnterpriseServiceClient();
   const projectPath = client.projectPath(projectID);

   // Build the assessment request.
   const request = ({
     assessment: {
       event: {
         token: token,
         siteKey: recaptchaKey,
         userIpAddress: userIpAddress,
         userAgent: userAgent,
         ja3: ja3,
       },
     },
     parent: projectPath,
   });

   // client.createAssessment() can return a Promise or take a Callback
   const [ response ] = await client.createAssessment(request);

   // Check if the token is valid.
   if (!response.tokenProperties.valid) {
    console.log("The CreateAssessment call failed because the token was: " +
      response.tokenProperties.invalidReason);

    return null;
   }

   // Check if the expected action was executed.
   // The `action` property is set by user client in the
   // grecaptcha.enterprise.execute() method.
   if (response.tokenProperties.action === recaptchaAction) {

    // Get the risk score and the reason(s).
    // For more information on interpreting the assessment,
    // see: https://cloud.google.com/recaptcha/docs/interpret-assessment
    console.log("The reCAPTCHA score is: " +
      response.riskAnalysis.score);

    response.riskAnalysis.reasons.forEach((reason) => {
      console.log(reason);
    });
    return response.riskAnalysis.score;
   } else {
    console.log("The action attribute in your reCAPTCHA tag " +
      "does not match the action you are expecting to score");
    return null;
   }
 }

PHP

  <?php

  // Include Google Cloud dependencies using Composer
  // composer require google/cloud-recaptcha-enterprise
  require 'vendor/autoload.php';

  use Google\Cloud\RecaptchaEnterprise\V1\RecaptchaEnterpriseServiceClient;
  use Google\Cloud\RecaptchaEnterprise\V1\Event;
  use Google\Cloud\RecaptchaEnterprise\V1\Assessment;
  use Google\Cloud\RecaptchaEnterprise\V1\TokenProperties\InvalidReason;

  /**
  * Create an assessment to analyze the risk of a UI action.
  * @param string $siteKey The key ID for the reCAPTCHA key (See https://cloud.google.com/recaptcha/docs/create-key)
  * @param string $token The user's response token for which you want to receive a reCAPTCHA score. (See https://cloud.google.com/recaptcha/docs/create-assessment#retrieve_token)
  * @param string $project Your Google Cloud project ID
  */
  function create_assessment(
     string $siteKey,
     string $token,
     string $project
  ): void {
  // TODO: To avoid memory issues, move this client generation outside
  // of this example, and cache it (recommended) or call client.close()
  // before exiting this method.
  $client = new RecaptchaEnterpriseServiceClient();
  $projectName = $client->projectName($project);

     $event = (new Event())
         ->setSiteKey($siteKey)
         ->setToken($token);

     $assessment = (new Assessment())
         ->setEvent($event);

     try {
         $response = $client->createAssessment(
             $projectName,
             $assessment
         );

         // You can use the score only if the assessment is valid,
         // In case of failures like re-submitting the same token, getValid() will return false
         if ($response->getTokenProperties()->getValid() == false) {
             printf('The CreateAssessment() call failed because the token was invalid for the following reason: ');
             printf(InvalidReason::name($response->getTokenProperties()->getInvalidReason()));
         } else {
             printf('The score for the protection action is:');
             printf($response->getRiskAnalysis()->getScore());

             // Optional: You can use the following methods to get more data about the token
             // Action name provided at token generation.
             // printf($response->getTokenProperties()->getAction() . PHP_EOL);
             // The timestamp corresponding to the generation of the token.
             // printf($response->getTokenProperties()->getCreateTime()->getSeconds() . PHP_EOL);
             // The hostname of the page on which the token was generated.
             // printf($response->getTokenProperties()->getHostname() . PHP_EOL);
         }
     } catch (exception $e) {
         printf('CreateAssessment() call failed with the following error: ');
         printf($e);
     }
  }

  // TODO(Developer): Replace the following before running the sample
  create_assessment(
     'YOUR_RECAPTCHA_KEY',
     'YOUR_USER_RESPONSE_TOKEN',
     'YOUR_GOOGLE_CLOUD_PROJECT_ID'
  );
?>

Python


from google.cloud import recaptchaenterprise_v1
from google.cloud.recaptchaenterprise_v1 import Assessment


def create_assessment(
    project_id: str,
    recaptcha_site_key: str,
    token: str,
    recaptcha_action: str,
    user_ip_address: str,
    user_agent: str,
    ja3: str,
) -> Assessment:
    """Create an assessment to analyze the risk of a UI action.
    Args:
        project_id: GCloud Project ID
        recaptcha_site_key: Site key obtained by registering a domain/app to use recaptcha services.
        token: The token obtained from the client on passing the recaptchaSiteKey.
        recaptcha_action: Action name corresponding to the token.
        user_ip_address: IP address of the user sending a request.
        user_agent: User agent is included in the HTTP request in the request header.
        ja3: JA3 associated with the request.
    """

    client = recaptchaenterprise_v1.RecaptchaEnterpriseServiceClient()

    # Set the properties of the event to be tracked.
    event = recaptchaenterprise_v1.Event()
    event.site_key = recaptcha_site_key
    event.token = token
    event.user_ip_address = user_ip_address
    event.user_agent = user_agent
    event.ja3 = ja3

    assessment = recaptchaenterprise_v1.Assessment()
    assessment.event = event

    project_name = f"projects/{project_id}"

    # Build the assessment request.
    request = recaptchaenterprise_v1.CreateAssessmentRequest()
    request.assessment = assessment
    request.parent = project_name

    response = client.create_assessment(request)

    # Check if the token is valid.
    if not response.token_properties.valid:
        print(
            "The CreateAssessment call failed because the token was "
            + "invalid for for the following reasons: "
            + str(response.token_properties.invalid_reason)
        )
        return

    # Check if the expected action was executed.
    if response.token_properties.action != recaptcha_action:
        print(
            "The action attribute in your reCAPTCHA tag does"
            + "not match the action you are expecting to score"
        )
        return
    else:
        # Get the risk score and the reason(s)
        # For more information on interpreting the assessment,
        # see: https://cloud.google.com/recaptcha-enterprise/docs/interpret-assessment
        for reason in response.risk_analysis.reasons:
            print(reason)
        print(
            "The reCAPTCHA score for this token is: "
            + str(response.risk_analysis.score)
        )
        # Get the assessment name (id). Use this to annotate the assessment.
        assessment_name = client.parse_assessment_path(response.name).get("assessment")
        print(f"Assessment name: {assessment_name}")
    return response

Ruby

require "google/cloud/recaptcha_enterprise"

# Create an assessment to analyze the risk of a UI action.
#
# @param site_key [String] Site key obtained by registering a domain/app to use recaptcha services.
# @param token [String] The token obtained from the client on passing the recaptcha site_key.
# @param project_id [String] GCloud Project ID.
# @param recaptcha_action [String] Action name corresponding to the token.
# @return [void]
def create_assessment site_key:, token:, project_id:, recaptcha_action:
  # Create the reCAPTCHA client.
  client = ::Google::Cloud::RecaptchaEnterprise.recaptcha_enterprise_service

  request = { parent: "projects/#{project_id}",
              assessment: {
                event: {
                  site_key: site_key,
                  token: token
                }
              } }

  response = client.create_assessment request

  # Check if the token is valid.
  if !response.token_properties.valid
    puts "The create_assessment() call failed because the token was invalid with the following reason:" \
         "#{response.token_properties.invalid_reason}"
  # Check if the expected action was executed.
  elsif response.token_properties.action == recaptcha_action
    # Get the risk score and the reason(s).
    # For more information on interpreting the assessment,
    # see: https://cloud.google.com/recaptcha-enterprise/docs/interpret-assessment
    puts "The reCAPTCHA score for this token is: #{response.risk_analysis.score}"
    response.risk_analysis.reasons.each { |reason| puts reason }
  else
    puts "The action attribute in your reCAPTCHA tag does not match the action you are expecting to score"
  end
end

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