处理 Google 云端硬盘中的活动

# Install needed dependencies
$ npm install googleapis @google-cloud/local-auth axios

// app.js

const fs = require('fs').promises;
const {authenticate} = require('@google-cloud/local-auth');
const {google} = require('googleapis');
const axios = require('axios');

// Scopes for Google Drive API access.
const SCOPES = ['SCOPES'];

/**
 * Authenticates the user running the script.
 * @return {Promise<OAuth2Client>} The authorized client.
 */
async function authorize() {
  const client = await authenticate({
    scopes: SCOPES,
    keyfilePath: 'credentials.json',
  });
  if (client.credentials) {
    const content = await fs.readFile('credentials.json');
    const keys = JSON.parse(content);
    const {client_id, client_secret} = keys.installed || keys.web;
    const payload = JSON.stringify({
      type: 'authorized_user',
      client_id,
      client_secret,
      refresh_token: client.credentials.refresh_token,
    });
    await fs.writeFile('token.json', payload);
    return client;
  } else {
    throw new Exception(
        'credentials.json did not have the Oauth client secret or it was not properly formatted');
  }
  }

/**
 * Creates a subscription to Google Drive events.
 * @param {OAuth2Client} authClient An authorized OAuth2 client.
 */
async function createSubscription(authClient) {
  const url = 'https://workspaceevents.googleapis.com/v1/subscriptions';
  const data = {
    targetResource: 'TARGET_RESOURCE',
    eventTypes: ['EVENT_TYPES'],
    payload_options: {
      include_resource: {
        {
          'RESOURCE_DATA'
        }
      }
    },
    drive_options: {
      include_descendants: {
        {
          'INCLUDE_DESCENDANTS'
        }
      }
    },
    notification_endpoint: {pubsub_topic: 'TOPIC_NAME'}
  };
  try {
    const {token} = await authClient.getAccessToken();
    const response = await axios.post(
        url, data, {headers: {'Authorization': `Bearer ${token}`}});
    console.log('Subscription created:', response.data);
  } catch (error) {
    const message = error.response ? error.response.data : error.message;
    console.error('Error creating subscription:', message);
  }
}

authorize().then(createSubscription).catch(console.error);

{
  "dependencies": {
    "@google-cloud/functions-framework": "^3.0.0",
    "cloudevents": "^8.0.0"
  }
}

const functions = require('@google-cloud/functions-framework');
const { HTTP } = require("cloudevents");

/**
 * A Cloud Function triggered by Pub/Sub messages containing Google Drive activity events.
 * This function processes different types of Drive events.
 *
 * @param {object} cloudEvent The CloudEvent object.
 * @param {object} cloudEvent.data The data payload from the event source.
 */
functions.cloudEvent('helloFromDrive', async (cloudEvent) => {
  try {
    // Verify the Pub/Sub message exists
    if (!cloudEvent.data || !cloudEvent.data.message) {
      console.warn("Event is missing the Pub/Sub message payload.");
      return;
    }

    // Extract the Pub/Sub message details
    const { message } = cloudEvent.data;
    const { attributes, data } = message;

    // The original Drive CloudEvent is reconstructed from the Pub/Sub message attributes
    const driveEvent = HTTP.toEvent({ headers: attributes });
    const { type } = driveEvent;

    // The Drive event's payload is a base64 encoded JSON string
    const payload = JSON.parse(Buffer.from(data, "base64").toString());

    console.log(`Processing Drive event type: ${type}`);

    // Use a switch statement to handle different event types
    switch (type) {
      case 'google.workspace.drive.file.v3.contentChanged':
        console.log('File Content Changed:', payload);
        break;
      case 'google.workspace.drive.accessproposal.v3.created':
        console.log('Access Proposal Created:', payload);
        break;
      default:
        console.log(`Received unhandled event type: ${type}`);
        break;
    }
  } catch (error) {
    console.error("An error occurred while processing the Drive event:", error);
  }
});