本頁面由 Cloud Translation API 翻譯而成。

收發郵件回條

訊息回條會告知寄件者他們已收到或讀取自己的訊息。透過讀取作業，使用者可以看到代理程式已讀取訊息的時間，因此知道自己應該回覆訊息。代理程式也可以判斷使用者何時收到及讀取訊息，因此您可以追蹤收據指標，以改善互動設計。

服務專員會在 Webhook 中收到收據。接收和處理收據的方式與接收訊息相同。

如果使用者同時傳送或讀取多則訊息，單一酬載會包含所有訊息收據。查看每封收據，找出相關聯的郵件。

收據類型

Business Messages 支援傳送回條和讀取回條。

使用者的收據

代理程式可向使用者傳送下列收據：

傳送回條 (DELIVERED) 表示使用者已收到代理程式的訊息。
讀取回條 (READ) 表示使用者已讀取代理程式的訊息。

使用者可以選擇傳送讀取回條。即使選擇停用，他們仍會收到代理程式的讀取回條。

服務專員的收據

使用者可以接收代理程式的讀取回條。

讀取回條 (READ) 表示代理程式已讀取使用者的訊息。如果對話是由多個即時代理程式管理，則讀取回條代表至少有一位代理程式讀取使用者的訊息。

格式

使用者的收據

使用者的送達回條格式如下：

{
  "agent": "brands/BRAND_ID/agents/AGENT_ID",
  "conversationId": "CONVERSATION_ID",
  "customAgentId": "CUSTOM_AGENT_ID",
  "sendTime": "SEND_TIME",
  "receipts" : {
    "receipts": [
      {
        "message": "conversations/CONVERSATION_ID/messages/MESSAGE_ID",
        "receiptType": "DELIVERED",
      }
    ],
    "createTime": "RECEIPTS_CREATION_TIME",
  },
}

使用者的讀取回條格式如下：

{
  "agent": "brands/BRAND_ID/agents/AGENT_ID",
  "conversationId": "CONVERSATION_ID",
  "customAgentId": "CUSTOM_AGENT_ID",
  "sendTime": "SEND_TIME",
  "receipts" : {
    "receipts": [
      {
        "message": "conversations/CONVERSATION_ID/messages/MESSAGE_ID",
        "receiptType": "READ",
      }
    ],
    "createTime": "RECEIPTS_CREATION_TIME",
  },
}

如需格式設定和值選項，請參閱 UserMessage 和 Receipts。

服務專員的收據

下列程式碼會傳送代理程式的讀取回條：

cURL

curl -X PATCH \
-H "`./oauth2l header --json 'PATH_TO_SERVICE_ACCOUNT_KEY' businessmessages`" \
-H "Content-Type: application/json" \
-d '{
  "receiptType": "READ"
}' \
"https://businessmessages.googleapis.com/v1/conversations/CONVERSATION_ID/messages/MESSAGE_ID/receipt"

Node.js

const businessmessages = require('businessmessages');
const uuidv4 = require('uuid/v4');
const {google} = require('googleapis');

// Initialize the Business Messages API
let bmApi = new businessmessages.businessmessages_v1.Businessmessages({});

// Set the scope that we need for the Business Messages API
const scopes = [
  'https://www.googleapis.com/auth/businessmessages',
];

// Set the private key to the service account file
const privatekey = require('PATH_TO_SERVICE_ACCOUNT_KEY');

/**
 * Initializes the Google credentials for calling the
 * Business Messages API.
 */
async function initCredentials() {
  // Configure a JWT auth client
  let authClient = new google.auth.JWT(
      privatekey.client_email,
      null,
      privatekey.private_key,
      scopes,
  );

  return new Promise(function(resolve, reject) {
    // Authenticate request
    authClient.authorize(function(err, tokens) {
      if (err) {
        reject(false);
      } else {
        resolve(authClient);
      }
    });
  });
}

/**
 * Sends a read receipt to a specific messageId.
 *
 * @param {string} conversationId The unique id for this user and agent.
 * @param {string} messageId The unique id for this message.
 */
async function sendReadReceipt(conversationId, messageId) {
  let authClient = await initCredentials();

  // Create the payload for sending a read receipt
  let apiParams = {
    auth: authClient,
    name: 'conversations/' + conversationId + '/messages/' + messageId + '/receipt',
    resource: {
      receiptType:'READ'
    }
  };

  // Call the updateReceipt create function using the
  // Business Messages client library
  bmApi.conversations.messages.updateReceipt(apiParams,
    {auth: authClient}, (err, response) => {
    console.log(err);
    console.log(response);
  });
}

sendReadReceipt('CONVERSATION_ID', 'MESSAGE_ID');

此程式碼採用 Node.js Business Messages 用戶端程式庫。

Java

import com.google.api.client.googleapis.services.AbstractGoogleClientRequest;
import com.google.api.client.http.HttpBackOffUnsuccessfulResponseHandler;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.util.ExponentialBackOff;
import com.google.api.services.businessmessages.v1.Businessmessages;
import com.google.api.services.businessmessages.v1.model.BusinessMessagesReceipt;

import com.google.api.services.businessmessages.v1.model.*;
import java.io.FileInputStream;
import java.util.Arrays;
import java.util.UUID;

public class ReadReceiptSample {
  /**
   * Initializes credentials used by the Business Messages API.
   */
  private static Businessmessages.Builder getBusinessMessagesBuilder() {
    Businessmessages.Builder builder = null;
    try {
      GoogleCredential credential = GoogleCredential
            .fromStream(new FileInputStream("PATH_TO_SERVICE_ACCOUNT_KEY"));

      credential = credential.createScoped(Arrays.asList(
            "https://www.googleapis.com/auth/businessmessages"));

      credential.refreshToken();

      HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
      JacksonFactory jsonFactory = JacksonFactory.getDefaultInstance();

      // Create instance of the Business Messages API
      builder = new Businessmessages
        .Builder(httpTransport, jsonFactory, null)
        .setApplicationName("Sample Application");

      // Set the API credentials and endpoint
      builder.setHttpRequestInitializer(credential);
    } catch (Exception e) {
      e.printStackTrace();
    }

    return builder;
  }

  public static void main(String args[]) {
    try{
      String conversationId = "CONVERSATION_ID";
      String messageId = "MESSAGE_ID";

      // Create client library reference
      Businessmessages.Builder builder = getBusinessMessagesBuilder();

     // Create a new read receipt
     Businessmessages.Conversations.Messages.UpdateReceipt request
       = builder.build().conversations().messages()
         .updateReceipt("conversations/" + conversationId + "/messages/" + messageId + "/receipt",
           new BusinessMessagesReceipt().setReceiptType("READ"));

      // Set up retries with exponential backoff
      HttpRequest httpRequest =
          ((AbstractGoogleClientRequest) request).buildHttpRequest();

      httpRequest.setUnsuccessfulResponseHandler(new
          HttpBackOffUnsuccessfulResponseHandler(
          new ExponentialBackOff()));

      // Execute request
      httpRequest.execute();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

此程式碼採用 Java Business Messages 用戶端程式庫。

Python

from oauth2client.service_account import ServiceAccountCredentials
from businessmessages import businessmessages_v1_client as bm_client
from businessmessages.businessmessages_v1_messages import (
    BusinessMessagesReceipt)

credentials = ServiceAccountCredentials.from_json_keyfile_name(
    'PATH_TO_SERVICE_ACCOUNT_KEY',
    scopes=['https://www.googleapis.com/auth/businessmessages'])

client = bm_client.BusinessmessagesV1(credentials=credentials)

conversation_id = 'CONVERSATION_ID'
message_id = 'MESSAGE_ID'

read_receipt = BusinessMessagesReceipt(
    name=f"conversations/{conversation_id}/messages/{message_id}/receipt",
    receiptType=BusinessMessagesReceipt.ReceiptTypeValueValuesEnum.READ
)

# Send the message
bm_client.BusinessmessagesV1.ConversationsMessagesService(
    client=client).UpdateReceipt(request=read_receipt)

此程式碼採用 Python Business Messages 用戶端程式庫。

如需格式設定和值選項，請參閱 ReceiptType。