Make an object public

Make an object in a Cloud Storage bucket publicly accessible.

Code sample

C++

For more information, see the Cloud Storage C++ API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  namespace 
  
 gcs 
  
 = 
  
 :: 
 google 
 :: 
 cloud 
 :: 
 storage 
 ; 
 using 
  
 :: 
 google 
 :: 
 cloud 
 :: 
 StatusOr 
 ; 
 []( 
 gcs 
 :: 
 Client 
  
 client 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 bucket_name 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 object_name 
 ) 
  
 { 
  
 StatusOr<gcs 
 :: 
 ObjectMetadata 
>  
 updated 
  
 = 
  
 client 
 . 
 PatchObject 
 ( 
  
 bucket_name 
 , 
  
 object_name 
 , 
  
 gcs 
 :: 
 ObjectMetadataPatchBuilder 
 (), 
  
 gcs 
 :: 
 PredefinedAcl 
 :: 
 PublicRead 
 ()); 
  
 if 
  
 ( 
 ! 
 updated 
 ) 
  
 throw 
  
 std 
 :: 
 move 
 ( 
 updated 
 ). 
 status 
 (); 
  
 std 
 :: 
 cout 
 << 
 "Object updated. The full metadata after the update is: " 
 << 
 * 
 updated 
 << 
 " 
 \n 
 " 
 ; 
 } 
 

C#

For more information, see the Cloud Storage C# API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  using 
  
 Google.Apis.Storage.v1.Data 
 ; 
 using 
  
  Google.Cloud.Storage.V1 
 
 ; 
 using 
  
 System 
 ; 
 using 
  
 System.Collections.Generic 
 ; 
 public 
  
 class 
  
 MakePublicSample 
 { 
  
 public 
  
 string 
  
 MakePublic 
 ( 
  
 string 
  
 bucketName 
  
 = 
  
 "your-unique-bucket-name" 
 , 
  
 string 
  
 objectName 
  
 = 
  
 "your-object-name" 
 ) 
  
 { 
  
 var 
  
 storage 
  
 = 
  
  StorageClient 
 
 . 
  Create 
 
 (); 
  
 var 
  
 storageObject 
  
 = 
  
 storage 
 . 
 GetObject 
 ( 
 bucketName 
 , 
  
 objectName 
 ); 
  
 storageObject 
 . 
  Acl 
 
  
 ??= 
  
 new 
  
 List<ObjectAccessControl> 
 (); 
  
 storage 
 . 
 UpdateObject 
 ( 
 storageObject 
 , 
  
 new 
  
  UpdateObjectOptions 
 
  
 { 
  
 PredefinedAcl 
  
 = 
  
  PredefinedObjectAcl 
 
 . 
  PublicRead 
 
  
 }); 
  
 Console 
 . 
 WriteLine 
 ( 
 objectName 
  
 + 
  
 " is now public and can be fetched from " 
  
 + 
  
 storageObject 
 . 
 MediaLink 
 ); 
  
 return 
  
 storageObject 
 . 
 MediaLink 
 ; 
  
 } 
 } 
 

Go

For more information, see the Cloud Storage Go API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  import 
  
 ( 
  
 "context" 
  
 "fmt" 
  
 "io" 
  
 "time" 
  
 "cloud.google.com/go/storage" 
 ) 
 // makePublic gives all users read access to an object. 
 func 
  
 makePublic 
 ( 
 w 
  
 io 
 . 
  Writer 
 
 , 
  
 bucket 
 , 
  
 object 
  
 string 
 ) 
  
 error 
  
 { 
  
 // bucket := "bucket-name" 
  
 // object := "object-name" 
  
 ctx 
  
 := 
  
 context 
 . 
 Background 
 () 
  
 client 
 , 
  
 err 
  
 := 
  
 storage 
 . 
 NewClient 
 ( 
 ctx 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "storage.NewClient: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 defer 
  
 client 
 . 
 Close 
 () 
  
 ctx 
 , 
  
 cancel 
  
 := 
  
 context 
 . 
 WithTimeout 
 ( 
 ctx 
 , 
  
 time 
 . 
 Second 
 * 
 10 
 ) 
  
 defer 
  
 cancel 
 () 
  
 acl 
  
 := 
  
 client 
 . 
  Bucket 
 
 ( 
 bucket 
 ). 
  Object 
 
 ( 
 object 
 ). 
 ACL 
 () 
  
 if 
  
 err 
  
 := 
  
 acl 
 . 
  Set 
 
 ( 
 ctx 
 , 
  
 storage 
 . 
  AllUsers 
 
 , 
  
 storage 
 . 
  RoleReader 
 
 ); 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "ACLHandle.Set: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 fmt 
 . 
 Fprintf 
 ( 
 w 
 , 
  
 "Blob %v is now publicly accessible.\n" 
 , 
  
 object 
 ) 
  
 return 
  
 nil 
 } 
 

Java

For more information, see the Cloud Storage Java API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  import 
  
 com.google.cloud.storage. Acl 
 
 ; 
 import 
  
 com.google.cloud.storage. BlobId 
 
 ; 
 import 
  
 com.google.cloud.storage. Storage 
 
 ; 
 import 
  
 com.google.cloud.storage. StorageOptions 
 
 ; 
 public 
  
 class 
 MakeObjectPublic 
  
 { 
  
 public 
  
 static 
  
 void 
  
 makeObjectPublic 
 ( 
 String 
  
 projectId 
 , 
  
 String 
  
 bucketName 
 , 
  
 String 
  
 objectName 
 ) 
  
 { 
  
 // String projectId = "your-project-id"; 
  
 // String bucketName = "your-bucket-name"; 
  
 // String objectName = "your-object-name"; 
  
  Storage 
 
  
 storage 
  
 = 
  
  StorageOptions 
 
 . 
 newBuilder 
 (). 
 setProjectId 
 ( 
 projectId 
 ). 
 build 
 (). 
  getService 
 
 (); 
  
  BlobId 
 
  
 blobId 
  
 = 
  
  BlobId 
 
 . 
 of 
 ( 
 bucketName 
 , 
  
 objectName 
 ); 
  
 storage 
 . 
  createAcl 
 
 ( 
 blobId 
 , 
  
 Acl 
 . 
 of 
 ( 
 Acl 
 . 
 User 
 . 
 ofAllUsers 
 (), 
  
 Acl 
 . 
 Role 
 . 
 READER 
 )); 
  
 System 
 . 
 out 
 . 
 println 
 ( 
  
 "Object " 
  
 + 
  
 objectName 
  
 + 
  
 " in bucket " 
  
 + 
  
 bucketName 
  
 + 
  
 " was made publicly readable" 
 ); 
  
 } 
 } 
 

Node.js

For more information, see the Cloud Storage Node.js API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  /** 
 * TODO(developer): Uncomment the following lines before running the sample. 
 */ 
 // The ID of your GCS bucket 
 // const bucketName = 'your-unique-bucket-name'; 
 // The ID of your GCS file 
 // const fileName = 'your-file-name'; 
 // Imports the Google Cloud client library 
 const 
  
 { 
 Storage 
 } 
  
 = 
  
 require 
 ( 
 ' @google-cloud/storage 
' 
 ); 
 // Creates a client 
 const 
  
 storage 
  
 = 
  
 new 
  
 Storage 
 (); 
 async 
  
 function 
  
 makePublic 
 () 
  
 { 
  
 await 
  
 storage 
 . 
 bucket 
 ( 
 bucketName 
 ). 
 file 
 ( 
 fileName 
 ). 
 makePublic 
 (); 
  
 console 
 . 
 log 
 ( 
 `gs:// 
 ${ 
 bucketName 
 } 
 / 
 ${ 
 fileName 
 } 
 is now public.` 
 ); 
 } 
 makePublic 
 (). 
 catch 
 ( 
 console 
 . 
 error 
 ); 
 

PHP

For more information, see the Cloud Storage PHP API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  use Google\Cloud\Storage\StorageClient; 
 /** 
 * Make an object publically accessible. 
 * 
 * @param string $bucketName The name of your Cloud Storage bucket. 
 *        (e.g. 'my-bucket') 
 * @param string $objectName The name of your Cloud Storage object. 
 *        (e.g. 'my-object') 
 */ 
 function make_public(string $bucketName, string $objectName): void 
 { 
 $storage = new StorageClient(); 
 $bucket = $storage->bucket($bucketName); 
 $object = $bucket->object($objectName); 
 $object->update(['acl' => []], ['predefinedAcl' => 'PUBLICREAD']); 
 printf('gs://%s/%s is now public' . PHP_EOL, $bucketName, $objectName); 
 } 
 

Python

For more information, see the Cloud Storage Python API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  from 
  
 google.cloud 
  
 import 
  storage 
 
 def 
  
 make_blob_public 
 ( 
 bucket_name 
 , 
 blob_name 
 ): 
  
 """Makes a blob publicly accessible.""" 
 # bucket_name = "your-bucket-name" 
 # blob_name = "your-object-name" 
 storage_client 
 = 
  storage 
 
 . 
  Client 
 
 () 
 bucket 
 = 
 storage_client 
 . 
  bucket 
 
 ( 
 bucket_name 
 ) 
 blob 
 = 
 bucket 
 . 
 blob 
 ( 
 blob_name 
 ) 
 blob 
 . 
 make_public 
 () 
 print 
 ( 
 f 
 "Blob 
 { 
 blob 
 . 
 name 
 } 
 is publicly accessible at 
 { 
 blob 
 . 
  public_url 
 
 } 
 " 
 ) 
 

Ruby

For more information, see the Cloud Storage Ruby API reference documentation .

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for client libraries .

  def 
  
 make_public 
  
 bucket_name 
 :, 
  
 file_name 
 : 
  
 # The ID of your GCS bucket 
  
 # bucket_name = "your-unique-bucket-name" 
  
 # The ID of your GCS object to make public 
  
 # file_name = "your-file-name" 
  
 require 
  
 "google/cloud/storage" 
  
 storage 
  
 = 
  
 Google 
 :: 
 Cloud 
 :: 
  Storage 
 
 . 
  new 
 
  
 bucket 
  
 = 
  
 storage 
 . 
 bucket 
  
 bucket_name 
 , 
  
 skip_lookup 
 : 
  
 true 
  
 file 
  
 = 
  
 bucket 
 . 
  file 
 
  
 file_name 
  
 file 
 . 
 acl 
 . 
 public! 
  
 puts 
  
 " 
 #{ 
 file 
 . 
 name 
 } 
 is publicly accessible at 
 #{ 
 file 
 . 
  public_url 
 
 } 
 " 
 end 
 

What's next

To search and filter code samples for other Google Cloud products, see the Google Cloud sample browser .

Create a Mobile Website
View Site in Mobile | Classic
Share by: