Upload an object by streaming

  namespace 
  
 gcs 
  
 = 
  
 :: 
 google 
 :: 
 cloud 
 :: 
 storage 
 ; 
 using 
  
 :: 
 google 
 :: 
 cloud 
 :: 
 StatusOr 
 ; 
 []( 
 gcs 
 :: 
 Client 
  
 client 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 bucket_name 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 object_name 
 , 
  
 int 
  
 desired_line_count 
 ) 
  
 { 
  
 std 
 :: 
 string 
  
 const 
  
 text 
  
 = 
  
 "Lorem ipsum dolor sit amet" 
 ; 
  
 gcs 
 :: 
 ObjectWriteStream 
  
 stream 
  
 = 
  
 client 
 . 
 WriteObject 
 ( 
 bucket_name 
 , 
  
 object_name 
 ); 
  
 for 
  
 ( 
 int 
  
 lineno 
  
 = 
  
 0 
 ; 
  
 lineno 
  
 != 
  
 desired_line_count 
 ; 
  
 ++ 
 lineno 
 ) 
  
 { 
  
 // Add 1 to the counter, because it is conventional to number lines 
  
 // starting at 1. 
  
 stream 
 << 
 ( 
 lineno 
  
 + 
  
 1 
 ) 
 << 
 ": " 
 << 
 text 
 << 
 " 
 \n 
 " 
 ; 
  
 } 
  
 stream 
 . 
 Close 
 (); 
  
 StatusOr<gcs 
 :: 
 ObjectMetadata 
>  
 metadata 
  
 = 
  
 std 
 :: 
 move 
 ( 
 stream 
 ). 
 metadata 
 (); 
  
 if 
  
 ( 
 ! 
 metadata 
 ) 
  
 throw 
  
 std 
 :: 
 move 
 ( 
 metadata 
 ). 
 status 
 (); 
  
 std 
 :: 
 cout 
 << 
 "Successfully wrote to object " 
 << 
 metadata 
 - 
> name 
 () 
 << 
 " its size is: " 
 << 
 metadata 
 - 
> size 
 () 
 << 
 " 
 \n 
 Full metadata: " 
 << 
 * 
 metadata 
 << 
 " 
 \n 
 " 
 ; 
 } 
 

  using 
  
  Google.Cloud.Storage.V1 
 
 ; 
 using 
  
 System 
 ; 
 using 
  
 System.IO 
 ; 
 public 
  
 class 
  
 UploadFileSample 
 { 
  
 public 
  
 void 
  
 UploadFile 
 ( 
  
 string 
  
 bucketName 
  
 = 
  
 "your-unique-bucket-name" 
 , 
  
 string 
  
 localPath 
  
 = 
  
 "my-local-path/my-file-name" 
 , 
  
 string 
  
 objectName 
  
 = 
  
 "my-file-name" 
 ) 
  
 { 
  
 var 
  
 storage 
  
 = 
  
  StorageClient 
 
 . 
  Create 
 
 (); 
  
 using 
  
 var 
  
 fileStream 
  
 = 
  
 File 
 . 
 OpenRead 
 ( 
 localPath 
 ); 
  
 storage 
 . 
 UploadObject 
 ( 
 bucketName 
 , 
  
 objectName 
 , 
  
 null 
 , 
  
 fileStream 
 ); 
  
 Console 
 . 
 WriteLine 
 ( 
 $"Uploaded {objectName}." 
 ); 
  
 } 
 } 
 

  import 
  
 ( 
  
 "bytes" 
  
 "context" 
  
 "fmt" 
  
 "io" 
  
 "time" 
  
 "cloud.google.com/go/storage" 
 ) 
 // streamFileUpload uploads an object via a stream. 
 func 
  
 streamFileUpload 
 ( 
 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 
 () 
  
 b 
  
 := 
  
 [] 
 byte 
 ( 
 "Hello world." 
 ) 
  
 buf 
  
 := 
  
 bytes 
 . 
 NewBuffer 
 ( 
 b 
 ) 
  
 ctx 
 , 
  
 cancel 
  
 := 
  
 context 
 . 
 WithTimeout 
 ( 
 ctx 
 , 
  
 time 
 . 
 Second 
 * 
 50 
 ) 
  
 defer 
  
 cancel 
 () 
  
 // Upload an object with storage.Writer. 
  
 wc 
  
 := 
  
 client 
 . 
  Bucket 
 
 ( 
 bucket 
 ). 
  Object 
 
 ( 
 object 
 ). 
  NewWriter 
 
 ( 
 ctx 
 ) 
  
 wc 
 . 
 ChunkSize 
  
 = 
  
 0 
  
 // note retries are not supported for chunk size 0. 
  
 if 
  
 _ 
 , 
  
 err 
  
 = 
  
 io 
 . 
 Copy 
 ( 
 wc 
 , 
  
 buf 
 ); 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "io.Copy: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 // Data can continue to be added to the file until the writer is closed. 
  
 if 
  
 err 
  
 := 
  
 wc 
 . 
 Close 
 (); 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "Writer.Close: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 fmt 
 . 
 Fprintf 
 ( 
 w 
 , 
  
 "%v uploaded to %v.\n" 
 , 
  
 object 
 , 
  
 bucket 
 ) 
  
 return 
  
 nil 
 } 
 

  import 
  
 com.google.cloud. WriteChannel 
 
 ; 
 import 
  
 com.google.cloud.storage. BlobId 
 
 ; 
 import 
  
 com.google.cloud.storage. BlobInfo 
 
 ; 
 import 
  
 com.google.cloud.storage. Storage 
 
 ; 
 import 
  
 com.google.cloud.storage. StorageOptions 
 
 ; 
 import 
  
 java.io.IOException 
 ; 
 import 
  
 java.nio.ByteBuffer 
 ; 
 import 
  
 java.nio.charset.StandardCharsets 
 ; 
 public 
  
 class 
 StreamObjectUpload 
  
 { 
  
 public 
  
 static 
  
 void 
  
 streamObjectUpload 
 ( 
  
  String 
 
  
 projectId 
 , 
  
  String 
 
  
 bucketName 
 , 
  
  String 
 
  
 objectName 
 , 
  
  String 
 
  
 contents 
 ) 
  
 throws 
  
 IOException 
  
 { 
  
 // The ID of your GCP project 
  
 // String projectId = "your-project-id"; 
  
 // The ID of your GCS bucket 
  
 // String bucketName = "your-unique-bucket-name"; 
  
 // The ID of your GCS object 
  
 // String objectName = "your-object-name"; 
  
 // The string of contents you wish to upload 
  
 // String contents = "Hello world!"; 
  
  Storage 
 
  
 storage 
  
 = 
  
  StorageOptions 
 
 . 
 newBuilder 
 (). 
 setProjectId 
 ( 
 projectId 
 ). 
 build 
 (). 
 getService 
 (); 
  
  BlobId 
 
  
 blobId 
  
 = 
  
  BlobId 
 
 . 
 of 
 ( 
 bucketName 
 , 
  
 objectName 
 ); 
  
  BlobInfo 
 
  
 blobInfo 
  
 = 
  
  BlobInfo 
 
 . 
 newBuilder 
 ( 
 blobId 
 ). 
 build 
 (); 
  
 byte 
 [] 
  
 content 
  
 = 
  
 contents 
 . 
 getBytes 
 ( 
 StandardCharsets 
 . 
 UTF_8 
 ); 
  
 try 
  
 ( 
  WriteChannel 
 
  
 writer 
  
 = 
  
 storage 
 . 
  writer 
 
 ( 
 blobInfo 
 )) 
  
 { 
  
 writer 
 . 
 write 
 ( 
 ByteBuffer 
 . 
 wrap 
 ( 
 content 
 )); 
  
 System 
 . 
 out 
 . 
 println 
 ( 
  
 "Wrote to " 
  
 + 
  
 objectName 
  
 + 
  
 " in bucket " 
  
 + 
  
 bucketName 
  
 + 
  
 " using a WriteChannel." 
 ); 
  
 } 
  
 } 
 } 
 

  /** 
 * TODO(developer): Uncomment the following lines before running the sample 
 */ 
 // The ID of your GCS bucket 
 // const bucketName = 'your-unique-bucket-name'; 
 // The new ID for your GCS file 
 // const destFileName = 'your-new-file-name'; 
 // The content to be uploaded in the GCS file 
 // const contents = 'your file content'; 
 // Imports the Google Cloud client library 
 const 
  
 { 
 Storage 
 } 
  
 = 
  
 require 
 ( 
 ' @google-cloud/storage 
' 
 ); 
 // Import Node.js stream 
 const 
  
 stream 
  
 = 
  
 require 
 ( 
 'stream' 
 ); 
 // Creates a client 
 const 
  
 storage 
  
 = 
  
 new 
  
 Storage 
 (); 
 // Get a reference to the bucket 
 const 
  
 myBucket 
  
 = 
  
 storage 
 . 
 bucket 
 ( 
 bucketName 
 ); 
 // Create a reference to a file object 
 const 
  
 file 
  
 = 
  
 myBucket 
 . 
 file 
 ( 
 destFileName 
 ); 
 // Create a pass through stream from a string 
 const 
  
 passthroughStream 
  
 = 
  
 new 
  
 stream 
 . 
 PassThrough 
 (); 
 passthroughStream 
 . 
 write 
 ( 
 contents 
 ); 
 passthroughStream 
 . 
 end 
 (); 
 async 
  
 function 
  
 streamFileUpload 
 () 
  
 { 
  
 passthroughStream 
 . 
 pipe 
 ( 
 file 
 . 
  createWriteStream 
 
 ()). 
 on 
 ( 
 'finish' 
 , 
  
 () 
  
 = 
>  
 { 
  
 // The file upload is complete 
  
 }); 
  
 console 
 . 
 log 
 ( 
 ` 
 ${ 
 destFileName 
 } 
 uploaded to 
 ${ 
 bucketName 
 } 
 ` 
 ); 
 } 
 streamFileUpload 
 (). 
 catch 
 ( 
 console 
 . 
 error 
 ); 
 

  use Google\Cloud\Storage\StorageClient; 
 use Google\Cloud\Storage\WriteStream; 
 /** 
 * Upload a chunked file stream. 
 * 
 * @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') 
 * @param string $contents The contents to upload via stream chunks. 
 *        (e.g. 'these are my contents') 
 */ 
 function upload_object_stream(string $bucketName, string $objectName, string $contents): void 
 { 
 $storage = new StorageClient(); 
 $bucket = $storage->bucket($bucketName); 
 $writeStream = new WriteStream(null, [ 
 'chunkSize' => 1024 * 256, // 256KB 
 ]); 
 $uploader = $bucket->getStreamableUploader($writeStream, [ 
 'name' => $objectName, 
 ]); 
 $writeStream->setUploader($uploader); 
 $stream = fopen('data://text/plain,' . $contents, 'r'); 
 while (($line = stream_get_line($stream, 1024 * 256)) !== false) { 
 $writeStream->write($line); 
 } 
 $writeStream->close(); 
 printf('Uploaded %s to gs://%s/%s' . PHP_EOL, $contents, $bucketName, $objectName); 
 } 
 

  from 
  
 google.cloud 
  
 import 
  storage 
 
 def 
  
 upload_blob_from_stream 
 ( 
 bucket_name 
 , 
 file_obj 
 , 
 destination_blob_name 
 ): 
  
 """Uploads bytes from a stream or other file-like object to a blob.""" 
 # The ID of your GCS bucket 
 # bucket_name = "your-bucket-name" 
 # The stream or file (file-like object) from which to read 
 # import io 
 # file_obj = io.BytesIO() 
 # file_obj.write(b"This is test data.") 
 # The desired name of the uploaded GCS object (blob) 
 # destination_blob_name = "storage-object-name" 
 # Construct a client-side representation of the blob. 
 storage_client 
 = 
  storage 
 
 . 
  Client 
 
 () 
 bucket 
 = 
 storage_client 
 . 
  bucket 
 
 ( 
 bucket_name 
 ) 
 blob 
 = 
 bucket 
 . 
 blob 
 ( 
 destination_blob_name 
 ) 
 # Rewind the stream to the beginning. This step can be omitted if the input 
 # stream will always be at a correct position. 
 file_obj 
 . 
 seek 
 ( 
 0 
 ) 
 # Upload data from the stream to your bucket. 
 blob 
 . 
  upload_from_file 
 
 ( 
 file_obj 
 ) 
 print 
 ( 
 f 
 "Stream data uploaded to 
 { 
 destination_blob_name 
 } 
 in bucket 
 { 
 bucket_name 
 } 
 ." 
 ) 
 

  # The ID of your GCS bucket 
 # bucket_name = "your-unique-bucket-name" 
 # The stream or file (file-like object) from which to read 
 # local_file_obj = StringIO.new "This is test data." 
 # Name of a file in the Storage bucket 
 # file_name   = "some_file.txt" 
 require 
  
 "google/cloud/storage" 
 storage 
  
 = 
  
 Google 
 :: 
 Cloud 
 :: 
  Storage 
 
 . 
  new 
 
 bucket 
  
 = 
  
 storage 
 . 
 bucket 
  
 bucket_name 
 local_file_obj 
 . 
 rewind 
 bucket 
 . 
  create_file 
 
  
 local_file_obj 
 , 
  
 file_name 
 puts 
  
 "Stream data uploaded to 
 #{ 
 file_name 
 } 
 in bucket 
 #{ 
 bucket_name 
 } 
 "