การลิงก์บัญชีกับ OAuth (Dialogflow)

ประเภทการลิงก์ OAuth รองรับขั้นตอน OAuth 2.0 มาตรฐานอุตสาหกรรม 2 ขั้นตอน ซึ่งเรียกว่า implicit และขั้นตอนของรหัสการให้สิทธิ์

In the implicit code flow, Google opens your authorization endpoint in the user's browser. After successful sign in, you return a long-lived access token to Google. This access token is now included in every request sent from the Assistant to your Action.

In the authorization code flow, you need two endpoints:

• The authorization endpoint, which is responsible for presenting the sign-in UI to your users that aren't already signed in and recording consent to the requested access in the form of a short-lived authorization code.
• The token exchange endpoint, which is responsible for two types of exchanges:
  1. Exchanges an authorization code for a long-lived refresh token and a short-lived access token. This exchange happens when the user goes through the account linking flow.
  2. Exchanges a long-lived refresh token for a short-lived access token. This exchange happens when Google needs a new access token because the one it had expired.

Although the implicit code flow is simpler to implement, Google recommends that access tokens issued using the implicit flow never expire, because using token expiration with the implicit flow forces the user to link their account again. If you need token expiration for security reasons, you should strongly consider using the auth code flow instead.

ใช้การลิงก์บัญชี OAuth

กำหนดค่าโปรเจ็กต์

หากต้องการกำหนดค่าโปรเจ็กต์ให้ใช้การลิงก์บัญชี OAuth ให้ทำตามขั้นตอนต่อไปนี้

1. เปิดคอนโซล Actions และเลือกโปรเจ็กต์ที่ต้องการใช้
2. คลิกแท็บพัฒนา แล้วเลือกการลิงก์บัญชี
3. เปิดใช้สวิตช์ข้างการลิงก์บัญชี
4. ในส่วนการสร้างบัญชี ให้เลือกไม่ ฉันต้องการอนุญาตให้สร้างบัญชีบนเว็บไซต์ของฉันเท่านั้น

5. ในส่วนประเภทการลิงก์ ให้เลือก OAuth และ Implicit

   

6. ในส่วนข้อมูลลูกค้า ให้ทำดังนี้

   • กำหนดค่าให้กับรหัสไคลเอ็นต์ที่ออกโดย Actions to Google เพื่อระบุ คำขอที่มาจาก Google
   • แทรก URL สำหรับปลายทาง Authorization และ Token Exchange

6. คลิกบันทึก

ใช้เซิร์ฟเวอร์ OAuth

To support the OAuth 2.0 implicit flow, your service makes an authorization endpoint available by HTTPS. This endpoint is responsible for authenticating and obtaining consent from users for data access. The authorization endpoint presents a sign-in UI to your users that aren't already signed in and records consent to the requested access.

When your Action needs to call one of your service's authorized APIs, Google uses this endpoint to get permission from your users to call these APIs on their behalf.

A typical OAuth 2.0 implicit flow session initiated by Google has the following flow:

1. Google opens your authorization endpoint in the user's browser. The user signs in if not signed in already, and grants Google permission to access their data with your API if they haven't already granted permission.
2. Your service creates an access token and returns it to Google by redirecting the user's browser back to Google with the access token attached to the request.
3. Google calls your service's APIs, and attaches the access token with each request. Your service verifies that the access token grants Google authorization to access the API and then completes the API call.

Handle authorization requests

When your Action needs to perform account linking via an OAuth2 implicit flow, Google sends the user to your authorization endpoint with a request that includes the following parameters:

For example, if your authorization endpoint is available at https://myservice.example.com/auth, a request might look like:

GET https://myservice.example.com/auth?client_id=GOOGLE_CLIENT_ID&redirect_uri=REDIRECT_URI&state=STATE_STRING&response_type=token

For your authorization endpoint to handle sign-in requests, do the following steps:

1. Verify the client_id and redirect_uri values to prevent granting access to unintended or misconfigured client apps:

   • Confirm that the client_id matches the client ID you assigned to Google.
   • Confirm that the URL specified by the redirect_uri parameter has the following form:

     https://oauth-redirect.googleusercontent.com/r/YOUR_PROJECT_ID

     YOUR_PROJECT_ID is the ID found on the Project settings page of the Actions Console.

2. Check if the user is signed in to your service. If the user isn't signed in, complete your service's sign-in or sign-up flow.

3. Generate an access token that Google will use to access your API. The access token can be any string value, but it must uniquely represent the user and the client the token is for and must not be guessable.

4. Send an HTTP response that redirects the user's browser to the URL specified by the redirect_uri parameter. Include all of the following parameters in the URL fragment:

   • access_token: the access token you just generated
   • token_type: the string bearer
   • state: the unmodified state value from the original request The following is an example of the resulting URL:

     https://oauth-redirect.googleusercontent.com/r/YOUR_PROJECT_ID#access_token=ACCESS_TOKEN&token_type=bearer&state=STATE_STRING

Google's OAuth 2.0 redirect handler will receive the access token and confirm that the state value hasn't changed. After Google has obtained an access token for your service, Google will attach the token to subsequent calls to your Action as part of the AppRequest.

เริ่มขั้นตอนการตรวจสอบสิทธิ์

ใช้จุดประสงค์ของตัวช่วยในการลงชื่อเข้าใช้บัญชี เพื่อเริ่มขั้นตอนการตรวจสอบสิทธิ์ ข้อมูลโค้ดต่อไปนี้อธิบายวิธี ส่งคำตอบใน Dialogflow และ Actions SDK เพื่อใช้ตัวช่วยนี้

Dialogflow

const {dialogflow, SignIn} = require('actions-on-google');
const app = dialogflow({
  // REPLACE THE PLACEHOLDER WITH THE CLIENT_ID OF YOUR ACTIONS PROJECT
  clientId: CLIENT_ID,
});
// Intent that starts the account linking flow.
app.intent('Start Signin', (conv) => {
  conv.ask(new SignIn('To get your account details'));
});

@ForIntent("Start Signin")
public ActionResponse text(ActionRequest request) {
  ResponseBuilder rb = getResponseBuilder(request);
  return rb.add(new SignIn().setContext("To get your account details")).build();
}

{
  "payload": {
    "google": {
      "expectUserResponse": true,
      "richResponse": {
        "items": [
          {
            "simpleResponse": {
              "textToSpeech": "PLACEHOLDER"
            }
          }
        ]
      },
      "userStorage": "{\"data\":{}}",
      "systemIntent": {
        "intent": "actions.intent.SIGN_IN",
        "data": {
          "@type": "type.googleapis.com/google.actions.v2.SignInValueSpec",
          "optContext": "To get your account details"
        }
      }
    }
  },
  "outputContexts": [
    {
      "name": "/contexts/_actions_on_google",
      "lifespanCount": 99,
      "parameters": {
        "data": "{}"
      }
    }
  ]
}

Actions SDK:

const {actionssdk, SignIn} = require('actions-on-google');
const app = actionssdk({
  // REPLACE THE PLACEHOLDER WITH THE CLIENT_ID OF YOUR ACTIONS PROJECT
  clientId: CLIENT_ID,
});
// Intent that starts the account linking flow.
app.intent('actions.intent.TEXT', (conv) => {
  conv.ask(new SignIn('To get your account details'));
});

@ForIntent("actions.intent.TEXT")
public ActionResponse text(ActionRequest request) {
  ResponseBuilder rb = getResponseBuilder(request);
  return rb.add(new SignIn().setContext("To get your account details")).build();
}

{
  "expectUserResponse": true,
  "expectedInputs": [
    {
      "inputPrompt": {
        "richInitialPrompt": {
          "items": [
            {
              "simpleResponse": {
                "textToSpeech": "PLACEHOLDER"
              }
            }
          ]
        }
      },
      "possibleIntents": [
        {
          "intent": "actions.intent.SIGN_IN",
          "inputValueData": {
            "@type": "type.googleapis.com/google.actions.v2.SignInValueSpec",
            "optContext": "To get your account details"
          }
        }
      ]
    }
  ],
  "conversationToken": "{\"data\":{}}",
  "userStorage": "{\"data\":{}}"
}

จัดการคำขอเข้าถึงข้อมูล

หากคําขอ Assistant มีโทเค็นเพื่อการเข้าถึง ก่อนอื่นให้ตรวจสอบว่าโทเค็นเพื่อการเข้าถึงถูกต้อง (และไม่หมดอายุ) แล้วเรียกข้อมูลบัญชีผู้ใช้ที่เชื่อมโยงจากฐานข้อมูล