Pub/Sub की मदद से, फ़ायरवॉल से सुरक्षित Google Chat ऐप्लिकेशन बनाएं

Node.js

• Business या Enterprise Google Workspace खाता, जिसमें Google Chat का ऐक्सेस हो.
• बिलिंग की सुविधा वाला Google क्लाउड प्रोजेक्ट. यह देखने के लिए कि किसी मौजूदा प्रोजेक्ट के लिए बिलिंग की सुविधा चालू है या नहीं, अपने प्रोजेक्ट के बिलिंग स्टेटस की पुष्टि करें लेख पढ़ें. प्रोजेक्ट बनाने और बिलिंग सेट अप करने के लिए, Google Cloud प्रोजेक्ट बनाना लेख पढ़ें.
• Node.js 14 या इसके बाद का वर्शन
• npm पैकेज मैनेजमेंट टूल
• शुरू किया गया Node.js प्रोजेक्ट. नया प्रोजेक्ट शुरू करने के लिए, एक नया फ़ोल्डर बनाएं और उसमें स्विच करें. इसके बाद, कमांड-लाइन इंटरफ़ेस में यह कमांड चलाएं:

  npm init

Python

• Business या Enterprise Google Workspace खाता, जिसमें Google Chat का ऐक्सेस हो.
• बिलिंग की सुविधा वाला Google क्लाउड प्रोजेक्ट. यह देखने के लिए कि किसी मौजूदा प्रोजेक्ट के लिए बिलिंग की सुविधा चालू है या नहीं, अपने प्रोजेक्ट के बिलिंग स्टेटस की पुष्टि करें लेख पढ़ें. प्रोजेक्ट बनाने और बिलिंग सेट अप करने के लिए, Google Cloud प्रोजेक्ट बनाना लेख पढ़ें.
• Python 3.6 या इसके बाद का वर्शन
• पैकेज मैनेजमेंट टूल pip

Java

• Business या Enterprise Google Workspace खाता, जिसमें Google Chat का ऐक्सेस हो.
• बिलिंग की सुविधा वाला Google क्लाउड प्रोजेक्ट. यह देखने के लिए कि किसी मौजूदा प्रोजेक्ट के लिए बिलिंग की सुविधा चालू है या नहीं, अपने प्रोजेक्ट के बिलिंग स्टेटस की पुष्टि करें लेख पढ़ें. प्रोजेक्ट बनाने और बिलिंग सेट अप करने के लिए, Google Cloud प्रोजेक्ट बनाना लेख पढ़ें.
• Java 11 या इसके बाद का वर्शन
• Maven पैकेज मैनेजमेंट टूल

Node.js

1. सीएलआई में, सेवा खाते के क्रेडेंशियल डालें:

   export GOOGLE_APPLICATION_CREDENTIALS=SERVICE_ACCOUNT_FILE_PATH
   

2. सीएलआई में, Google Cloud प्रोजेक्ट आईडी डालें:

   export PROJECT_ID=PROJECT_ID
   

3. सीएलआई में, उस Pub/Sub सदस्यता का सदस्यता आईडी डालें जिसे आपने पहले बनाया था:

   export SUBSCRIPTION_ID=SUBSCRIPTION_ID
   

4. अपनी वर्किंग डायरेक्ट्री में, package.json नाम की एक फ़ाइल बनाएं.

5. package.json फ़ाइल में, यह कोड चिपकाएं:

   {
     "name": "pub-sub-app",
     "version": "1.0.0",
     "description": "Google Chat App that listens for messages via Cloud Pub/Sub",
     "main": "index.js",
     "scripts": {
       "start": "node index.js",
       "test": "echo \"Error: no test specified\" && exit 1"
     },
     "dependencies": {
       "@google-apps/chat": "^0.4.0",
       "@google-cloud/pubsub": "^4.5.0"
     },
     "license": "Apache-2.0"
   }
   

6. अपनी वर्किंग डायरेक्ट्री में, index.js नाम की एक फ़ाइल बनाएं.

7. index.js में, यह कोड चिपकाएं:

   const {ChatServiceClient} = require('@google-apps/chat');
   const {MessageReplyOption} = require('@google-apps/chat').protos.google.chat.v1.CreateMessageRequest;
   const {PubSub} = require('@google-cloud/pubsub');
   const {SubscriberClient} = require('@google-cloud/pubsub/build/src/v1');
   
   // Receives messages from a pull subscription.
   function receiveMessages() {
     const chat = new ChatServiceClient({
       keyFile: process.env.GOOGLE_APPLICATION_CREDENTIALS,
       scopes: ['https://www.googleapis.com/auth/chat.bot'],
     });
   
     const subscriptionPath = new SubscriberClient()
       .subscriptionPath(process.env.PROJECT_ID, process.env.SUBSCRIPTION_ID)
     const subscription = new PubSub()
       .subscription(subscriptionPath);
   
     // Handle incoming message, then acknowledge the received message
     const messageHandler = message => {
       console.log(`Id : ${message.id}`);
       const event = JSON.parse(message.data);
       console.log(`Data : ${JSON.stringify(event)}`);
   
       // Post the response to Google Chat.
       const request = formatRequest(event);
       if (request != null) {
         chat.createMessage(request);
       }
   
       // Acknowledge the message.
       message.ack();
     }
   
     subscription.on('message', messageHandler);
     console.log(`Listening for messages on ${subscriptionPath}`);
   
     // Keep main thread from exiting while waiting for messages
     setTimeout(() => {
       subscription.removeListener('message', messageHandler);
       console.log(`Stopped listening for messages.`);
     }, 60 * 1000);
   }
   
   // Send message to Google Chat based on the type of event
   function formatRequest(event) {
     const chatEvent = event.chat || {};
   
     // If the app was removed, we don't respond.
     if (chatEvent.removedFromSpacePayload) {
       console.log(`App removed from space.`);
       return null;
     }
   
     const payload = chatEvent.messagePayload || chatEvent.addedToSpacePayload;
     const spaceName = payload?.space?.name;
   
     if (!spaceName) {
       console.log('No space name in event.');
       return null;
     }
   
     if (chatEvent.addedToSpacePayload) {
       // An app can also be added to a space by @mentioning it in a
       // message. In that case, we fall through to the message case
       // and let the app respond. If the app was added using the
       // invite flow, we just post a thank you message in the space.
       return {
         parent: spaceName,
         message: { text: 'Thank you for adding me!' },
       };
     } else if (chatEvent.messagePayload) {
       // In case of message, post the response in the same thread.
       const message = chatEvent.messagePayload.message;
       return {
         parent: spaceName,
         messageReplyOption: MessageReplyOption.REPLY_MESSAGE_FALLBACK_TO_NEW_THREAD,
         message: {
           text: 'You said: `' + message.text + '`',
           thread: { name: message.thread.name },
         },
       };
     }
   }
   
   if (!process.env.PROJECT_ID) {
     console.log('Missing PROJECT_ID env var.');
     process.exit(1);
   }
   if (!process.env.SUBSCRIPTION_ID) {
     console.log('Missing SUBSCRIPTION_ID env var.');
     process.exit(1);
   }
   if (!process.env.GOOGLE_APPLICATION_CREDENTIALS) {
     console.log('Missing GOOGLE_APPLICATION_CREDENTIALS env var.');
     process.exit(1);
   }
   
   receiveMessages();
   

Python

1. सीएलआई में, सेवा खाते के क्रेडेंशियल डालें:

   export GOOGLE_APPLICATION_CREDENTIALS=SERVICE_ACCOUNT_FILE_PATH
   

2. सीएलआई में, Google Cloud प्रोजेक्ट आईडी डालें:

   export PROJECT_ID=PROJECT_ID
   

3. सीएलआई में, उस Pub/Sub सदस्यता का सदस्यता आईडी डालें जिसे आपने पहले बनाया था:

   export SUBSCRIPTION_ID=SUBSCRIPTION_ID
   

4. अपनी वर्किंग डायरेक्ट्री में, requirements.txt नाम की एक फ़ाइल बनाएं.

5. requirements.txt फ़ाइल में, यह कोड चिपकाएं:

   google-cloud-pubsub>=2.23.0
   google-apps-chat==0.1.9
   

6. अपनी वर्किंग डायरेक्ट्री में, app.py नाम की एक फ़ाइल बनाएं.

7. app.py में, यह कोड चिपकाएं:

   import json
   import logging
   import os
   import sys
   import time
   from google.apps import chat_v1 as google_chat
   from google.cloud import pubsub_v1
   from google.oauth2.service_account import Credentials
   
   def receive_messages():
     """Receives messages from a pull subscription."""
   
     scopes = ['https://www.googleapis.com/auth/chat.bot']
     service_account_key_path = os.environ.get('GOOGLE_APPLICATION_CREDENTIALS')
     creds = Credentials.from_service_account_file(service_account_key_path)
     chat = google_chat.ChatServiceClient(
         credentials=creds, client_options={'scopes': scopes}
     )
   
     project_id = os.environ.get('PROJECT_ID')
     subscription_id = os.environ.get('SUBSCRIPTION_ID')
     subscriber = pubsub_v1.SubscriberClient()
     subscription_path = subscriber.subscription_path(project_id, subscription_id)
   
     # Handle incoming message, then acknowledge the received message
     def callback(message):
       event = json.loads(message.data)
       logging.info('Data : %s', event)
   
       # Post the response to Google Chat.
       request = format_request(event)
       if request is not None:
         chat.create_message(request)
   
       # Acknowledge the message.
       message.ack()
   
     subscriber.subscribe(subscription_path, callback = callback)
     logging.info('Listening for messages on %s', subscription_path)
   
     # Keep main thread from exiting while waiting for messages
     while True:
       time.sleep(60)
   
   def format_request(event):
     """Send message to Google Chat based on the type of event.
     Args:
       event: A dictionary with the event data.
     """
     chat_event = event.get('chat', {})
   
     # If the app was removed, we don't respond.
     if 'removedFromSpacePayload' in chat_event:
       logging.info('App removed from space.')
       return
   
     payload = chat_event.get('messagePayload') or chat_event.get(
         'addedToSpacePayload'
     )
     space_name = payload.get('space', {}).get('name') if payload else None
   
     if not space_name:
       logging.warning('No space name in event.')
       return
   
     if 'addedToSpacePayload' in chat_event:
       # An app can also be added to a space by @mentioning it in a
       # message. In that case, we fall through to the message case
       # and let the app respond. If the app was added using the
       # invite flow, we just post a thank you message in the space.
       return google_chat.CreateMessageRequest(
           parent = space_name,
           message = {
             'text': 'Thank you for adding me!'
           }
       )
     elif 'messagePayload' in chat_event:
       # In case of message, post the response in the same thread.
       message = chat_event['messagePayload']['message']
       return google_chat.CreateMessageRequest(
           parent = space_name,
           message_reply_option = google_chat.CreateMessageRequest.MessageReplyOption.REPLY_MESSAGE_FALLBACK_TO_NEW_THREAD,
           message = {
             'text': 'You said: `' + message['text'] + '`',
             'thread': {
               'name': message['thread']['name']
             }
           }
       )
   
   if __name__ == '__main__':
     if 'PROJECT_ID' not in os.environ:
       logging.error('Missing PROJECT_ID env var.')
       sys.exit(1)
   
     if 'SUBSCRIPTION_ID' not in os.environ:
       logging.error('Missing SUBSCRIPTION_ID env var.')
       sys.exit(1)
   
     if 'GOOGLE_APPLICATION_CREDENTIALS' not in os.environ:
       logging.error('Missing GOOGLE_APPLICATION_CREDENTIALS env var.')
       sys.exit(1)
   
     logging.basicConfig(
         level=logging.INFO,
         style='{',
         format='{levelname:.1}{asctime} {filename}:{lineno}] {message}')
     receive_messages()
   

Java

1. सीएलआई में, सेवा खाते के क्रेडेंशियल डालें:

   export GOOGLE_APPLICATION_CREDENTIALS=SERVICE_ACCOUNT_FILE_PATH
   

2. सीएलआई में, Google Cloud प्रोजेक्ट आईडी डालें:

   export PROJECT_ID=PROJECT_ID
   

3. सीएलआई में, उस Pub/Sub सदस्यता का सदस्यता आईडी डालें जिसे आपने पहले बनाया था:

   export SUBSCRIPTION_ID=SUBSCRIPTION_ID
   

4. अपनी वर्किंग डायरेक्ट्री में, pom.xml नाम की एक फ़ाइल बनाएं.

5. pom.xml फ़ाइल में, यह कोड चिपकाएं:

   <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
   
    <groupId>com.google.chat.addon</groupId>
    <artifactId>pubsub-addon-chat-app</artifactId>
    <version>0.1.0</version>
   
    <name>pubsub-addon-chat-app-java</name>
   
    <properties>
      <maven.compiler.release>11</maven.compiler.release>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
   
    <dependencyManagement>
      <dependencies>
        <dependency>
          <groupId>com.google.cloud</groupId>
          <artifactId>libraries-bom</artifactId>
          <version>26.41.0</version> <!-- Use a recent BOM version -->
          <type>pom</type>
          <scope>import</scope>
        </dependency>
      </dependencies>
    </dependencyManagement>
   
    <dependencies>
      <!-- Google Chat GAPIC library -->
      <dependency>
        <groupId>com.google.cloud</groupId>
        <artifactId>google-cloud-chat</artifactId>
      </dependency>
      <!-- Google Cloud Pub/Sub library -->
      <dependency>
        <groupId>com.google.cloud</groupId>
        <artifactId>google-cloud-pubsub</artifactId>
      </dependency>
      <!-- Google Apps Add-ons Event Object -->
      <dependency>
        <groupId>com.google.apps.addons.v1</groupId>
        <artifactId>google-apps-addons-v1-java</artifactId>
        <version>0.2.0</version> <!-- Check for latest version -->
      </dependency>
      <!-- Protobuf JSON utility -->
      <dependency>
        <groupId>com.google.protobuf</groupId>
        <artifactId>protobuf-java-util</artifactId>
      </dependency>
      <!-- Google Auth Library -->
      <dependency>
        <groupId>com.google.auth</groupId>
        <artifactId>google-auth-library-oauth2-http</artifactId>
      </dependency>
      <dependency>
        <groupId>com.google.api</groupId>
        <artifactId>gax</artifactId>
      </dependency>
      <!-- JSON utilities for PubSub message (if needed, though protobuf-java-util is primary for EventObject) -->
      <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.14.2</version>
      </dependency>
      <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-jdk14</artifactId>
        <version>1.7.36</version>
        <scope>runtime</scope>
      </dependency>
    </dependencies>
   
    <build>
      <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.13.0</version>
          <configuration>
            <source>11</source>
            <target>11</target>
          </configuration>
        </plugin>
        <plugin>
          <groupId>org.codehaus.mojo</groupId>
          <artifactId>exec-maven-plugin</artifactId>
          <version>3.3.0</version>
          <configuration>
            <mainClass>Main</mainClass>
          </configuration>
        </plugin>
      </plugins>
    </build>
   </project>
   

6. अपनी वर्किंग डायरेक्ट्री में, src/main/java डायरेक्ट्री स्ट्रक्चर बनाएं.

7. src/main/java डायरेक्ट्री में, Main.java नाम की फ़ाइल बनाएं.

8. Main.java में, यह कोड चिपकाएं:

   import com.fasterxml.jackson.databind.JsonNode;
   import com.fasterxml.jackson.databind.ObjectMapper;
   import com.google.api.gax.core.FixedCredentialsProvider;
   import com.google.auth.oauth2.GoogleCredentials;
   import com.google.chat.v1.ChatServiceClient;
   import com.google.chat.v1.ChatServiceSettings;
   import com.google.chat.v1.CreateMessageRequest;
   import com.google.chat.v1.CreateMessageRequest.MessageReplyOption;
   import com.google.chat.v1.Message;
   import com.google.chat.v1.Thread;
   import com.google.cloud.pubsub.v1.AckReplyConsumer;
   import com.google.cloud.pubsub.v1.MessageReceiver;
   import com.google.cloud.pubsub.v1.Subscriber;
   import com.google.pubsub.v1.ProjectSubscriptionName;
   import com.google.pubsub.v1.PubsubMessage;
   import java.io.FileInputStream;
   import java.util.Collections;
   
   public class Main {
   
     public static final String PROJECT_ID_ENV_PROPERTY = "PROJECT_ID";
     public static final String SUBSCRIPTION_ID_ENV_PROPERTY = "SUBSCRIPTION_ID";
     public static final String CREDENTIALS_PATH_ENV_PROPERTY = "GOOGLE_APPLICATION_CREDENTIALS";
   
     public static void main(String[] args) throws Exception {
       ProjectSubscriptionName subscriptionName =
           ProjectSubscriptionName.of(
               System.getenv(Main.PROJECT_ID_ENV_PROPERTY),
               System.getenv(Main.SUBSCRIPTION_ID_ENV_PROPERTY));
   
       // Instantiate app, which implements an asynchronous message receiver.
       EchoApp echoApp = new EchoApp();
   
       // Create a subscriber for <var>SUBSCRIPTION_ID</var> bound to the message receiver
       final Subscriber subscriber = Subscriber.newBuilder(subscriptionName, echoApp).build();
       System.out.println("Subscriber is listening to events...");
       subscriber.startAsync();
   
       // Wait for termination
       subscriber.awaitTerminated();
     }
   }
   
   /**
    * A demo app which implements {@link MessageReceiver} to receive messages.
    * It echoes incoming messages.
    */
   class EchoApp implements MessageReceiver {
   
     // Path to the private key JSON file of the service account to be used for posting response
     // messages to Google Chat.
     // In this demo, we are using the same service account for authorizing with Cloud Pub/Sub to
     // receive messages and authorizing with Google Chat to post messages. If you are using
     // different service accounts, set the path to the private key JSON file of the service
     // account used to post messages to Google Chat here.
     private static final String SERVICE_ACCOUNT_KEY_PATH =
       System.getenv(Main.CREDENTIALS_PATH_ENV_PROPERTY);
   
     // Developer code for Google Chat API scope.
     private static final String GOOGLE_CHAT_API_SCOPE = "https://www.googleapis.com/auth/chat.bot";
   
     private static final String ADDED_RESPONSE = "Thank you for adding me!";
   
     ChatServiceClient chatServiceClient;
   
     EchoApp() throws Exception {
       GoogleCredentials credential =
           GoogleCredentials.fromStream(new FileInputStream(SERVICE_ACCOUNT_KEY_PATH))
               .createScoped(Collections.singleton(GOOGLE_CHAT_API_SCOPE));
   
       // Create the ChatServiceSettings with the app credentials
       ChatServiceSettings chatServiceSettings =
           ChatServiceSettings.newBuilder()
               .setCredentialsProvider(FixedCredentialsProvider.create(credential))
               .build();
   
       // Set the Chat service client
       chatServiceClient = ChatServiceClient.create(chatServiceSettings);
     }
   
     // Called when a message is received by the subscriber.
     @Override
     public void receiveMessage(PubsubMessage pubsubMessage, AckReplyConsumer consumer) {
       System.out.println("Id : " + pubsubMessage.getMessageId());
       // Handle incoming message, then acknowledge the received message
       try {
         ObjectMapper mapper = new ObjectMapper();
         JsonNode dataJson = mapper.readTree(pubsubMessage.getData().toStringUtf8());
         System.out.println("Data : " + dataJson.toString());
         handle(dataJson);
         consumer.ack();
       } catch (Exception e) {
         System.out.println(e);
         // Negative acknowledgement makes Pub/Sub redeliver the message.
         consumer.nack();
       }
     }
   
     // Send message to Google Chat based on the type of event.
     public void handle(JsonNode eventJson) throws Exception {
       // Google Chat events for add-ons are wrapped in a 'chat' object.
       if (!eventJson.has("chat")) {
         System.out.println("Ignored: Not a Chat event (missing 'chat' field).");
         return;
       }
   
       JsonNode chatNode = eventJson.get("chat");
       CreateMessageRequest createMessageRequest = null;
   
       if (chatNode.has("messagePayload")) {
         // HANDLE MESSAGE
         JsonNode messagePayload = chatNode.get("messagePayload");
         JsonNode message = messagePayload.get("message");
         JsonNode space = messagePayload.get("space");
   
         String spaceName = space.get("name").asText();
         String userText = message.has("text") ? message.get("text").asText() : "";
         String threadName = message.has("thread") ? message.get("thread").get("name").asText() : "";
   
         System.out.println("Received message in " + spaceName + ": " + userText);
   
         createMessageRequest =
             CreateMessageRequest.newBuilder()
                 .setParent(spaceName)
                 .setMessageReplyOption(MessageReplyOption.REPLY_MESSAGE_FALLBACK_TO_NEW_THREAD)
                 .setMessage(
                     Message.newBuilder()
                         .setText("You said: `" + userText + "`")
                         .setThread(Thread.newBuilder().setName(threadName).build())
                         .build())
                 .build();
   
       } else if (chatNode.has("addedToSpacePayload")) {
         // HANDLE ADDED TO SPACE
         JsonNode addedPayload = chatNode.get("addedToSpacePayload");
         JsonNode space = addedPayload.get("space");
         String spaceName = space.get("name").asText();
   
         System.out.println("Added to space: " + spaceName);
   
         createMessageRequest =
             CreateMessageRequest.newBuilder()
                 .setParent(spaceName)
                 .setMessage(Message.newBuilder().setText(ADDED_RESPONSE).build())
                 .build();
   
       } else if (chatNode.has("removedFromSpacePayload")) {
         System.out.println("Removed from space.");
         return;
       } else {
         System.out.println("Ignored: Unhandled Chat event type.");
         return;
       }
   
       if (createMessageRequest != null) {
         // Post the response to Google Chat.
         chatServiceClient.createMessage(createMessageRequest);
         System.out.println("Sent reply.");
       }
     }
   }
   

Node.js

npm install
npm start

Python

python -m venv env
source env/bin/activate
pip install -r requirements.txt -U
python app.py

Java

mvn compile exec:java -Dexec.mainClass=Main