Google ড্রাইভ অ্যাপ্লিকেশানগুলির জন্য যেগুলি ফাইলগুলির পরিবর্তনগুলিকে ট্র্যাক করতে হবে, changes সংগ্রহটি ব্যবহারকারীর সাথে ভাগ করা সহ সমস্ত ফাইল পরিবর্তনগুলি সনাক্ত করার একটি কার্যকর উপায় প্রদান করে৷ ফাইল পরিবর্তিত হলে, সংগ্রহ প্রতিটি ফাইলের বর্তমান অবস্থা প্রদান করে।
শুরু পাতা টোকেন পান
অ্যাকাউন্টের বর্তমান অবস্থার জন্য পৃষ্ঠা টোকেন অনুরোধ করতে, changes.getStartPageToken ব্যবহার করুন। changes.list এ আপনার প্রাথমিক কলে এই টোকেন সংরক্ষণ করুন এবং ব্যবহার করুন।
বর্তমান পৃষ্ঠা টোকেন পুনরুদ্ধার করতে:
জাভা
drive/snippets/drive_v3/src/main/java/FetchStartPageToken.java
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.StartPageToken;
import com.google.auth.http.HttpCredentialsAdapter;
import com.google.auth.oauth2.GoogleCredentials;
import java.io.IOException;
import java.util.Arrays;
/* Class to demonstrate use-case of Drive's fetch start page token */
public class FetchStartPageToken {
/**
* Retrieve the start page token for the first time.
*
* @return Start page token as String.
* @throws IOException if file is not found
*/
public static String fetchStartPageToken() throws IOException {
/*Load pre-authorized user credentials from the environment.
TODO(developer) - See https://developers.google.com/identity for
guides on implementing OAuth2 for your application. */
GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
.createScoped(Arrays.asList(DriveScopes.DRIVE_FILE));
HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
credentials);
// Build a new authorized API client service.
Drive service = new Drive.Builder(new NetHttpTransport(),
GsonFactory.getDefaultInstance(),
requestInitializer)
.setApplicationName("Drive samples")
.build();
try {
StartPageToken response = service.changes()
.getStartPageToken().execute();
System.out.println("Start token: " + response.getStartPageToken());
return response.getStartPageToken();
} catch (GoogleJsonResponseException e) {
// TODO(developer) - handle error appropriately
System.err.println("Unable to fetch start page token: " + e.getDetails());
throw e;
}
}
}পাইথন
drive/snippets/drive-v3/change_snippet/fetch_start_page_token.py
import google.auth
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError
def fetch_start_page_token():
"""Retrieve page token for the current state of the account.
Returns & prints : start page token
Load pre-authorized user credentials from the environment.
TODO(developer) - See https://developers.google.com/identity
for guides on implementing OAuth2 for the application.
"""
creds, _ = google.auth.default()
try:
# create drive api client
service = build("drive", "v3", credentials=creds)
# pylint: disable=maybe-no-member
response = service.changes().getStartPageToken().execute()
print(f'Start token: {response.get("startPageToken")}')
except HttpError as error:
print(f"An error occurred: {error}")
response = None
return response.get("startPageToken")
if __name__ == "__main__":
fetch_start_page_token()পিএইচপি
drive/snippets/drive_v3/src/DriveFetchStartPageToken.php
use Google\Client;
use Google\Service\Drive;
# TODO - PHP client currently chokes on fetching start page token
function fetchStartPageToken()
{
try {
$client = new Client();
$client->useApplicationDefaultCredentials();
$client->addScope(Drive::DRIVE);
$driveService = new Drive($client);
$response = $driveService->changes->getStartPageToken();
printf("Start token: %s\n", $response->startPageToken);
return $response->startPageToken;
} catch(Exception $e) {
echo "Error Message: ".$e;
}
}.নেট
drive/snippets/drive_v3/DriveV3Snippets/FetchStartPageToken.cs
using Google.Apis.Auth.OAuth2;
using Google.Apis.Drive.v3;
using Google.Apis.Services;
namespace DriveV3Snippets
{
// Class to demonstrate use-case of Drive's fetch start page token
public class FetchStartPageToken
{
/// <summary>
/// Retrieve the starting page token.
/// </summary>
/// <returns>start page token as String, null otherwise.</returns>
public static string DriveFetchStartPageToken()
{
try
{
/* Load pre-authorized user credentials from the environment.
TODO(developer) - See https://developers.google.com/identity for
guides on implementing OAuth2 for your application. */
GoogleCredential credential = GoogleCredential.GetApplicationDefault()
.CreateScoped(DriveService.Scope.Drive);
// Create Drive API service.
var service = new DriveService(new BaseClientService.Initializer
{
HttpClientInitializer = credential,
ApplicationName = "Drive API Snippets"
});
var response = service.Changes.GetStartPageToken().Execute();
// Prints the token value.
Console.WriteLine("Start token: " + response.StartPageTokenValue);
return response.StartPageTokenValue;
}
catch (Exception e)
{
// TODO(developer) - handle error appropriately
if (e is AggregateException)
{
Console.WriteLine("Credential Not found");
}
else
{
throw;
}
}
return null;
}
}
}Node.js
drive/snippets/drive_v3/change_snippets/fetch_start_page_token.js
/**
* Retrieve page token for the current state of the account.
**/
async function fetchStartPageToken() {
// Get credentials and build service
// TODO (developer) - Use appropriate auth mechanism for your app
const {GoogleAuth} = require('google-auth-library');
const {google} = require('googleapis');
const auth = new GoogleAuth({
scopes: 'https://www.googleapis.com/auth/drive.appdata',
});
const service = google.drive({version: 'v3', auth});
try {
const res = await service.changes.getStartPageToken({});
const token = res.data.startPageToken;
console.log('start token: ', token);
return token;
} catch (err) {
// TODO(developer) - Handle error
throw err;
}
}পরিবর্তন পান
বর্তমানে সাইন ইন করা ব্যবহারকারীর জন্য পরিবর্তনের তালিকা পুনরুদ্ধার করতে, changes সংগ্রহে একটি GET অনুরোধ পাঠান, যেমন changes.list এ বিস্তারিত আছে।
changes সংগ্রহের এন্ট্রিগুলি কালানুক্রমিক ক্রমে হয় (প্রাচীনতম পরিবর্তনগুলি প্রথমে প্রদর্শিত হয়)৷ includeRemoved এবং restrictToMyDrive ক্যোয়ারী প্যারামিটার নির্ধারণ করে যে প্রতিক্রিয়াতে সরানো বা শেয়ার করা আইটেমগুলি অন্তর্ভুক্ত করা উচিত কিনা।
জাভা
drive/snippets/drive_v3/src/main/java/FetchChanges.java
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.ChangeList;
import com.google.auth.http.HttpCredentialsAdapter;
import com.google.auth.oauth2.GoogleCredentials;
import java.io.IOException;
import java.util.Arrays;
/* Class to demonstrate use-case of Drive's fetch changes in file. */
public class FetchChanges {
/**
* Retrieve the list of changes for the currently authenticated user.
*
* @param savedStartPageToken Last saved start token for this user.
* @return Saved token after last page.
* @throws IOException if file is not found
*/
public static String fetchChanges(String savedStartPageToken) throws IOException {
/*Load pre-authorized user credentials from the environment.
TODO(developer) - See https://developers.google.com/identity for
guides on implementing OAuth2 for your application.*/
GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
.createScoped(Arrays.asList(DriveScopes.DRIVE_FILE));
HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(
credentials);
// Build a new authorized API client service.
Drive service = new Drive.Builder(new NetHttpTransport(),
GsonFactory.getDefaultInstance(),
requestInitializer)
.setApplicationName("Drive samples")
.build();
try {
// Begin with our last saved start token for this user or the
// current token from getStartPageToken()
String pageToken = savedStartPageToken;
while (pageToken != null) {
ChangeList changes = service.changes().list(pageToken)
.execute();
for (com.google.api.services.drive.model.Change change : changes.getChanges()) {
// Process change
System.out.println("Change found for file: " + change.getFileId());
}
if (changes.getNewStartPageToken() != null) {
// Last page, save this token for the next polling interval
savedStartPageToken = changes.getNewStartPageToken();
}
pageToken = changes.getNextPageToken();
}
return savedStartPageToken;
} catch (GoogleJsonResponseException e) {
// TODO(developer) - handle error appropriately
System.err.println("Unable to fetch changes: " + e.getDetails());
throw e;
}
}
}পাইথন
drive/snippets/drive-v3/change_snippet/fetch_changes.py
import google.auth
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError
def fetch_changes(saved_start_page_token):
"""Retrieve the list of changes for the currently authenticated user.
prints changed file's ID
Args:
saved_start_page_token : StartPageToken for the current state of the
account.
Returns: saved start page token.
Load pre-authorized user credentials from the environment.
TODO(developer) - See https://developers.google.com/identity
for guides on implementing OAuth2 for the application.
"""
creds, _ = google.auth.default()
try:
# create drive api client
service = build("drive", "v3", credentials=creds)
# Begin with our last saved start token for this user or the
# current token from getStartPageToken()
page_token = saved_start_page_token
# pylint: disable=maybe-no-member
while page_token is not None:
response = (
service.changes().list(pageToken=page_token, spaces="drive").execute()
)
for change in response.get("changes"):
# Process change
print(f'Change found for file: {change.get("fileId")}')
if "newStartPageToken" in response:
# Last page, save this token for the next polling interval
saved_start_page_token = response.get("newStartPageToken")
page_token = response.get("nextPageToken")
except HttpError as error:
print(f"An error occurred: {error}")
saved_start_page_token = None
return saved_start_page_token
if __name__ == "__main__":
# saved_start_page_token is the token number
fetch_changes(saved_start_page_token=209)পিএইচপি
drive/snippets/drive_v3/src/DriveFetchChanges.php
use Google\Client;
use Google\Service\Drive;
# TODO - PHP client currently chokes on fetching start page token
function fetchChanges()
{
try {
$client = new Client();
$client->useApplicationDefaultCredentials();
$client->addScope(Drive::DRIVE);
$driveService = new Drive($client);
# Begin with our last saved start token for this user or the
# current token from getStartPageToken()
$savedStartPageToken = readLine("Enter Start Page Token: ");
$pageToken = $savedStartPageToken;
while ($pageToken != null) {
$response = $driveService->changes->listChanges($pageToken, array(
'spaces' => 'drive'
));
foreach ($response->changes as $change) {
// Process change
printf("Change found for file: %s", $change->fileId);
}
if ($response->newStartPageToken != null) {
// Last page, save this token for the next polling interval
$savedStartPageToken = $response->newStartPageToken;
}
$pageToken = $response->nextPageToken;
}
echo $savedStartPageToken;
} catch(Exception $e) {
echo "Error Message: ".$e;
}
}
require_once 'vendor/autoload.php';.নেট
drive/snippets/drive_v3/DriveV3Snippets/FetchChanges.cs
using Google.Apis.Auth.OAuth2;
using Google.Apis.Drive.v3;
using Google.Apis.Services;
namespace DriveV3Snippets
{
// Class to demonstrate use-case of Drive's fetch changes in file.
public class FetchChanges
{
/// <summary>
/// Retrieve the list of changes for the currently authenticated user.
/// prints changed file's ID
/// </summary>
/// <param name="savedStartPageToken">last saved start token for this user.</param>
/// <returns>saved token for the current state of the account, null otherwise.</returns>
public static string DriveFetchChanges(string savedStartPageToken)
{
try
{
/* Load pre-authorized user credentials from the environment.
TODO(developer) - See https://developers.google.com/identity for
guides on implementing OAuth2 for your application. */
GoogleCredential credential = GoogleCredential.GetApplicationDefault()
.CreateScoped(DriveService.Scope.Drive);
// Create Drive API service.
var service = new DriveService(new BaseClientService.Initializer
{
HttpClientInitializer = credential,
ApplicationName = "Drive API Snippets"
});
// Begin with our last saved start token for this user or the
// current token from GetStartPageToken()
string pageToken = savedStartPageToken;
while (pageToken != null)
{
var request = service.Changes.List(pageToken);
request.Spaces = "drive";
var changes = request.Execute();
foreach (var change in changes.Changes)
{
// Process change
Console.WriteLine("Change found for file: " + change.FileId);
}
if (changes.NewStartPageToken != null)
{
// Last page, save this token for the next polling interval
savedStartPageToken = changes.NewStartPageToken;
}
pageToken = changes.NextPageToken;
}
return savedStartPageToken;
}
catch (Exception e)
{
// TODO(developer) - handle error appropriately
if (e is AggregateException)
{
Console.WriteLine("Credential Not found");
}
else
{
throw;
}
}
return null;
}
}
}Node.js
drive/snippets/drive_v3/change_snippets/fetch_changes.js
/**
* Retrieve the list of changes for the currently authenticated user.
* @param {string} savedStartPageToken page token got after executing fetch_start_page_token.js file
**/
async function fetchChanges(savedStartPageToken) {
// Get credentials and build service
// TODO (developer) - Use appropriate auth mechanism for your app
const {GoogleAuth} = require('google-auth-library');
const {google} = require('googleapis');
const auth = new GoogleAuth({
scopes: 'https://www.googleapis.com/auth/drive.readonly',
});
const service = google.drive({version: 'v3', auth});
try {
let pageToken = savedStartPageToken;
do {
const res = await service.changes.list({
pageToken: savedStartPageToken,
fields: '*',
});
res.data.changes.forEach((change) => {
console.log('change found for file: ', change.fileId);
});
pageToken = res.data.newStartPageToken;
return pageToken;
} while (pageToken);
} catch (err) {
// TODO(developer) - Handle error
throw err;
}
} প্রতিক্রিয়ার changes সংগ্রহে একটি nextPageToken থাকতে পারে। nextPageToken তালিকাভুক্ত হলে, এটি পরিবর্তনের পরবর্তী পৃষ্ঠা সংগ্রহ করতে ব্যবহার করা যেতে পারে। যদি এটি তালিকাভুক্ত না হয়, ক্লায়েন্ট অ্যাপ্লিকেশনটিকে ভবিষ্যতে ব্যবহারের জন্য প্রতিক্রিয়াতে newStartPageToken সংরক্ষণ করা উচিত। পৃষ্ঠা টোকেন সংরক্ষিত হলে, ক্লায়েন্ট অ্যাপ্লিকেশনটি ভবিষ্যতের পরিবর্তনের জন্য আবার জিজ্ঞাসা করার জন্য প্রস্তুত হয়।
বিজ্ঞপ্তি পান
পরিবর্তন লগে আপডেটের সদস্যতা নিতে changes.watch পদ্ধতি ব্যবহার করুন। বিজ্ঞপ্তিগুলিতে পরিবর্তনগুলি সম্পর্কে বিশদ বিবরণ থাকে না৷ পরিবর্তে, তারা নির্দেশ করে যে নতুন পরিবর্তন উপলব্ধ। প্রকৃত পরিবর্তনগুলি পুনরুদ্ধার করতে, পরিবর্তনগুলি পান এ বর্ণিত পরিবর্তনের ফিডটি পোল করুন৷
আরও তথ্যের জন্য, সম্পদ পরিবর্তনের জন্য বিজ্ঞপ্তি দেখুন।