使用分段上传上传对象

下面的示例使用高级别分段上传 Java API（TransferManager 类）上传对象。有关创建和测试有效示例的说明，请参阅测试 Amazon S3 Java 代码示例。

import com.amazonaws.AmazonServiceException;
import com.amazonaws.SdkClientException;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.transfer.TransferManager;
import com.amazonaws.services.s3.transfer.TransferManagerBuilder;
import com.amazonaws.services.s3.transfer.Upload;

import java.io.File;

public class HighLevelMultipartUpload {

    public static void main(String[] args) throws Exception {
        Regions clientRegion = Regions.DEFAULT_REGION;
        String bucketName = "*** Bucket name ***";
        String keyName = "*** Object key ***";
        String filePath = "*** Path for file to upload ***";

        try {
            AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                    .withRegion(clientRegion)
                    .withCredentials(new ProfileCredentialsProvider())
                    .build();
            TransferManager tm = TransferManagerBuilder.standard()
                    .withS3Client(s3Client)
                    .build();

            // TransferManager processes all transfers asynchronously,
            // so this call returns immediately.
            Upload upload = tm.upload(bucketName, keyName, new File(filePath));
            System.out.println("Object upload started");

            // Optionally, wait for the upload to finish before continuing.
            upload.waitForCompletion();
            System.out.println("Object upload complete");
        } catch (AmazonServiceException e) {
            // The call was transmitted successfully, but Amazon S3 couldn't process 
            // it, so it returned an error response.
            e.printStackTrace();
        } catch (SdkClientException e) {
            // Amazon S3 couldn't be contacted for a response, or the client
            // couldn't parse the response from Amazon S3.
            e.printStackTrace();
        }
    }
}

要将文件上传到 S3 存储桶，请使用 TransferUtility 类。在从文件上传数据时，您必须提供对象的键名。如果未提供，该 API 将使用文件名作为键名。在从流上传数据时，您必须提供对象的键名。

要设置高级上传选项（如段大小、并发上传段时的线程数、元数据、存储类或 ACL），请使用 TransferUtilityUploadRequest 类。

以下 C# 示例将文件分段上传到 Amazon S3 存储桶。它说明如何使用各种 TransferUtility.Upload 重载来上传文件。每个对上传的后续调用都将替换先前的上传。有关示例与适用于 .NET 的 AWS 开发工具包的特定版本的兼容性信息以及有关创建和测试有效示例的说明，请参阅运行 Amazon S3 .NET 代码示例。

using Amazon;
using Amazon.S3;
using Amazon.S3.Transfer;
using System;
using System.IO;
using System.Threading.Tasks;

namespace Amazon.DocSamples.S3
{
    class UploadFileMPUHighLevelAPITest
    {
        private const string bucketName = "*** provide bucket name ***";
        private const string keyName = "*** provide a name for the uploaded object ***";
        private const string filePath = "*** provide the full path name of the file to upload ***";
        // Specify your bucket region (an example region is shown).
        private static readonly RegionEndpoint bucketRegion = RegionEndpoint.USWest2;
        private static IAmazonS3 s3Client;

        public static void Main()
        {
            s3Client = new AmazonS3Client(bucketRegion);
            UploadFileAsync().Wait();
        }

        private static async Task UploadFileAsync()
        {
            try
            {
                var fileTransferUtility =
                    new TransferUtility(s3Client);

                // Option 1. Upload a file. The file name is used as the object key name.
                await fileTransferUtility.UploadAsync(filePath, bucketName);
                Console.WriteLine("Upload 1 completed");

                // Option 2. Specify object key name explicitly.
                await fileTransferUtility.UploadAsync(filePath, bucketName, keyName);
                Console.WriteLine("Upload 2 completed");

                // Option 3. Upload data from a type of System.IO.Stream.
                using (var fileToUpload = 
                    new FileStream(filePath, FileMode.Open, FileAccess.Read))
                {
                    await fileTransferUtility.UploadAsync(fileToUpload,
                                               bucketName, keyName);
                }
                Console.WriteLine("Upload 3 completed");

                // Option 4. Specify advanced settings.
                var fileTransferUtilityRequest = new TransferUtilityUploadRequest
                {
                    BucketName = bucketName,
                    FilePath = filePath,
                    StorageClass = S3StorageClass.StandardInfrequentAccess,
                    PartSize = 6291456, // 6 MB.
                    Key = keyName,
                    CannedACL = S3CannedACL.PublicRead
                };
                fileTransferUtilityRequest.Metadata.Add("param1", "Value1");
                fileTransferUtilityRequest.Metadata.Add("param2", "Value2");

                await fileTransferUtility.UploadAsync(fileTransferUtilityRequest);
                Console.WriteLine("Upload 4 completed");
            }
            catch (AmazonS3Exception e)
            {
                Console.WriteLine("Error encountered on server. Message:'{0}' when writing an object", e.Message);
            }
            catch (Exception e)
            {
                Console.WriteLine("Unknown encountered on server. Message:'{0}' when writing an object", e.Message);
            }

        }
    }
}

本主题介绍如何使用适用于 PHP 的 AWS 开发工具包中的高级别 Aws\S3\Model\MultipartUpload\UploadBuilder 类执行文件分段上传。此部分假定您已按照使用适用于 PHP 的 AWS 开发工具包和运行 PHP 示例中的说明执行操作，并正确安装了适用于 PHP 的 AWS 开发工具包。

以下 PHP 代码示例将文件上传到 Amazon S3 存储桶。该示例演示如何设置 MultipartUploader 对象的参数。

有关运行本指南中的 PHP 示例的信息，请参阅运行 PHP 示例。

 require 'vendor/autoload.php';

use Aws\Common\Exception\MultipartUploadException;
use Aws\S3\MultipartUploader;
use Aws\S3\S3Client;

$bucket = '*** Your Bucket Name ***';
$keyname = '*** Your Object Key ***';
                        
$s3 = new S3Client([
    'version' => 'latest',
    'region'  => 'us-east-1'
]);
 
// Prepare the upload parameters.
$uploader = new MultipartUploader($s3, '/path/to/large/file.zip', [
    'bucket' => $bucket,
    'key'    => $keyname
]);

// Perform the upload.
try {
    $result = $uploader->upload();
    echo "Upload complete: {$result['ObjectURL']}" . PHP_EOL;
} catch (MultipartUploadException $e) {
    echo $e->getMessage() . PHP_EOL;
}

以下示例使用高级别分段上传 Python API（TransferManager 类）上传对象。

"""
Use Boto 3 managed file transfers to manage multipart uploads to and downloads
from an Amazon S3 bucket.

When the file to transfer is larger than the specified threshold, the transfer
manager automatically uses multipart uploads or downloads. This demonstration
shows how to use several of the available transfer manager settings and reports
thread usage and time to transfer.
"""

import sys
import threading

import boto3
from boto3.s3.transfer import TransferConfig


MB = 1024 * 1024
s3 = boto3.resource('s3')


class TransferCallback:
    """
    Handle callbacks from the transfer manager.

    The transfer manager periodically calls the __call__ method throughout
    the upload and download process so that it can take action, such as
    displaying progress to the user and collecting data about the transfer.
    """

    def __init__(self, target_size):
        self._target_size = target_size
        self._total_transferred = 0
        self._lock = threading.Lock()
        self.thread_info = {}

    def __call__(self, bytes_transferred):
        """
        The callback method that is called by the transfer manager.

        Display progress during file transfer and collect per-thread transfer
        data. This method can be called by multiple threads, so shared instance
        data is protected by a thread lock.
        """
        thread = threading.current_thread()
        with self._lock:
            self._total_transferred += bytes_transferred
            if thread.ident not in self.thread_info.keys():
                self.thread_info[thread.ident] = bytes_transferred
            else:
                self.thread_info[thread.ident] += bytes_transferred

            target = self._target_size * MB
            sys.stdout.write(
                f"\r{self._total_transferred} of {target} transferred "
                f"({(self._total_transferred / target) * 100:.2f}%).")
            sys.stdout.flush()


def upload_with_default_configuration(local_file_path, bucket_name,
                                      object_key, file_size_mb):
    """
    Upload a file from a local folder to an Amazon S3 bucket, using the default
    configuration.
    """
    transfer_callback = TransferCallback(file_size_mb)
    s3.Bucket(bucket_name).upload_file(
        local_file_path,
        object_key,
        Callback=transfer_callback)
    return transfer_callback.thread_info


def upload_with_chunksize_and_meta(local_file_path, bucket_name, object_key,
                                   file_size_mb, metadata=None):
    """
    Upload a file from a local folder to an Amazon S3 bucket, setting a
    multipart chunk size and adding metadata to the Amazon S3 object.

    The multipart chunk size controls the size of the chunks of data that are
    sent in the request. A smaller chunk size typically results in the transfer
    manager using more threads for the upload.

    The metadata is a set of key-value pairs that are stored with the object
    in Amazon S3.
    """
    transfer_callback = TransferCallback(file_size_mb)

    config = TransferConfig(multipart_chunksize=1 * MB)
    extra_args = {'Metadata': metadata} if metadata else None
    s3.Bucket(bucket_name).upload_file(
        local_file_path,
        object_key,
        Config=config,
        ExtraArgs=extra_args,
        Callback=transfer_callback)
    return transfer_callback.thread_info


def upload_with_high_threshold(local_file_path, bucket_name, object_key,
                               file_size_mb):
    """
    Upload a file from a local folder to an Amazon S3 bucket, setting a
    multipart threshold larger than the size of the file.

    Setting a multipart threshold larger than the size of the file results
    in the transfer manager sending the file as a standard upload instead of
    a multipart upload.
    """
    transfer_callback = TransferCallback(file_size_mb)
    config = TransferConfig(multipart_threshold=file_size_mb * 2 * MB)
    s3.Bucket(bucket_name).upload_file(
        local_file_path,
        object_key,
        Config=config,
        Callback=transfer_callback)
    return transfer_callback.thread_info


def upload_with_sse(local_file_path, bucket_name, object_key,
                    file_size_mb, sse_key=None):
    """
    Upload a file from a local folder to an Amazon S3 bucket, adding server-side
    encryption with customer-provided encryption keys to the object.

    When this kind of encryption is specified, Amazon S3 encrypts the object
    at rest and allows downloads only when the expected encryption key is
    provided in the download request.
    """
    transfer_callback = TransferCallback(file_size_mb)
    if sse_key:
        extra_args = {
            'SSECustomerAlgorithm': 'AES256',
            'SSECustomerKey': sse_key}
    else:
        extra_args = None
    s3.Bucket(bucket_name).upload_file(
        local_file_path,
        object_key,
        ExtraArgs=extra_args,
        Callback=transfer_callback)
    return transfer_callback.thread_info


def download_with_default_configuration(bucket_name, object_key,
                                        download_file_path, file_size_mb):
    """
    Download a file from an Amazon S3 bucket to a local folder, using the
    default configuration.
    """
    transfer_callback = TransferCallback(file_size_mb)
    s3.Bucket(bucket_name).Object(object_key).download_file(
        download_file_path,
        Callback=transfer_callback)
    return transfer_callback.thread_info


def download_with_single_thread(bucket_name, object_key,
                                download_file_path, file_size_mb):
    """
    Download a file from an Amazon S3 bucket to a local folder, using a
    single thread.
    """
    transfer_callback = TransferCallback(file_size_mb)
    config = TransferConfig(use_threads=False)
    s3.Bucket(bucket_name).Object(object_key).download_file(
        download_file_path,
        Config=config,
        Callback=transfer_callback)
    return transfer_callback.thread_info


def download_with_high_threshold(bucket_name, object_key,
                                 download_file_path, file_size_mb):
    """
    Download a file from an Amazon S3 bucket to a local folder, setting a
    multipart threshold larger than the size of the file.

    Setting a multipart threshold larger than the size of the file results
    in the transfer manager sending the file as a standard download instead
    of a multipart download.
    """
    transfer_callback = TransferCallback(file_size_mb)
    config = TransferConfig(multipart_threshold=file_size_mb * 2 * MB)
    s3.Bucket(bucket_name).Object(object_key).download_file(
        download_file_path,
        Config=config,
        Callback=transfer_callback)
    return transfer_callback.thread_info


def download_with_sse(bucket_name, object_key, download_file_path,
                      file_size_mb, sse_key):
    """
    Download a file from an Amazon S3 bucket to a local folder, adding a
    customer-provided encryption key to the request.

    When this kind of encryption is specified, Amazon S3 encrypts the object
    at rest and allows downloads only when the expected encryption key is
    provided in the download request.
    """
    transfer_callback = TransferCallback(file_size_mb)

    if sse_key:
        extra_args = {
            'SSECustomerAlgorithm': 'AES256',
            'SSECustomerKey': sse_key}
    else:
        extra_args = None
    s3.Bucket(bucket_name).Object(object_key).download_file(
        download_file_path,
        ExtraArgs=extra_args,
        Callback=transfer_callback)
    return transfer_callback.thread_info

以下示例演示如何使用低级别 Java 类上传文件。它将执行以下步骤：

import com.amazonaws.AmazonServiceException;
import com.amazonaws.SdkClientException;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.*;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class LowLevelMultipartUpload {

    public static void main(String[] args) throws IOException {
        Regions clientRegion = Regions.DEFAULT_REGION;
        String bucketName = "*** Bucket name ***";
        String keyName = "*** Key name ***";
        String filePath = "*** Path to file to upload ***";

        File file = new File(filePath);
        long contentLength = file.length();
        long partSize = 5 * 1024 * 1024; // Set part size to 5 MB. 

        try {
            AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                    .withRegion(clientRegion)
                    .withCredentials(new ProfileCredentialsProvider())
                    .build();

            // Create a list of ETag objects. You retrieve ETags for each object part uploaded,
            // then, after each individual part has been uploaded, pass the list of ETags to 
            // the request to complete the upload.
            List<PartETag> partETags = new ArrayList<PartETag>();

            // Initiate the multipart upload.
            InitiateMultipartUploadRequest initRequest = new InitiateMultipartUploadRequest(bucketName, keyName);
            InitiateMultipartUploadResult initResponse = s3Client.initiateMultipartUpload(initRequest);

            // Upload the file parts.
            long filePosition = 0;
            for (int i = 1; filePosition < contentLength; i++) {
                // Because the last part could be less than 5 MB, adjust the part size as needed.
                partSize = Math.min(partSize, (contentLength - filePosition));

                // Create the request to upload a part.
                UploadPartRequest uploadRequest = new UploadPartRequest()
                        .withBucketName(bucketName)
                        .withKey(keyName)
                        .withUploadId(initResponse.getUploadId())
                        .withPartNumber(i)
                        .withFileOffset(filePosition)
                        .withFile(file)
                        .withPartSize(partSize);

                // Upload the part and add the response's ETag to our list.
                UploadPartResult uploadResult = s3Client.uploadPart(uploadRequest);
                partETags.add(uploadResult.getPartETag());

                filePosition += partSize;
            }

            // Complete the multipart upload.
            CompleteMultipartUploadRequest compRequest = new CompleteMultipartUploadRequest(bucketName, keyName,
                    initResponse.getUploadId(), partETags);
            s3Client.completeMultipartUpload(compRequest);
        } catch (AmazonServiceException e) {
            // The call was transmitted successfully, but Amazon S3 couldn't process 
            // it, so it returned an error response.
            e.printStackTrace();
        } catch (SdkClientException e) {
            // Amazon S3 couldn't be contacted for a response, or the client
            // couldn't parse the response from Amazon S3.
            e.printStackTrace();
        }
    }
}

以下 C# 示例演示如何使用适用于 .NET 的低级别 AWS 开发工具包分段上传 API 将文件上传到 S3 存储桶。有关 Amazon S3 分段上传的信息，请参阅使用分段上传来上传和复制对象。

以下 C# 示例使用低级别分段上传 API 将文件上传到 S3 存储桶。有关示例与适用于 .NET 的 AWS 开发工具包的特定版本的兼容性信息以及有关创建和测试有效示例的说明，请参阅运行 Amazon S3 .NET 代码示例。

using Amazon;
using Amazon.Runtime;
using Amazon.S3;
using Amazon.S3.Model;
using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;

namespace Amazon.DocSamples.S3
{
    class UploadFileMPULowLevelAPITest
    {
        private const string bucketName = "*** provide bucket name ***";
        private const string keyName = "*** provide a name for the uploaded object ***";
        private const string filePath = "*** provide the full path name of the file to upload ***";
        // Specify your bucket region (an example region is shown).
        private static readonly RegionEndpoint bucketRegion = RegionEndpoint.USWest2;
        private static IAmazonS3 s3Client;

        public static void Main()
        {
            s3Client = new AmazonS3Client(bucketRegion);
            Console.WriteLine("Uploading an object");
            UploadObjectAsync().Wait(); 
        }

        private static async Task UploadObjectAsync()
        {
            // Create list to store upload part responses.
            List<UploadPartResponse> uploadResponses = new List<UploadPartResponse>();

            // Setup information required to initiate the multipart upload.
            InitiateMultipartUploadRequest initiateRequest = new InitiateMultipartUploadRequest
            {
                BucketName = bucketName,
                Key = keyName
            };

            // Initiate the upload.
            InitiateMultipartUploadResponse initResponse =
                await s3Client.InitiateMultipartUploadAsync(initiateRequest);

            // Upload parts.
            long contentLength = new FileInfo(filePath).Length;
            long partSize = 5 * (long)Math.Pow(2, 20); // 5 MB

            try
            {
                Console.WriteLine("Uploading parts");
        
                long filePosition = 0;
                for (int i = 1; filePosition < contentLength; i++)
                {
                    UploadPartRequest uploadRequest = new UploadPartRequest
                        {
                            BucketName = bucketName,
                            Key = keyName,
                            UploadId = initResponse.UploadId,
                            PartNumber = i,
                            PartSize = partSize,
                            FilePosition = filePosition,
                            FilePath = filePath
                        };

                    // Track upload progress.
                    uploadRequest.StreamTransferProgress +=
                        new EventHandler<StreamTransferProgressArgs>(UploadPartProgressEventCallback);

                    // Upload a part and add the response to our list.
                    uploadResponses.Add(await s3Client.UploadPartAsync(uploadRequest));

                    filePosition += partSize;
                }

                // Setup to complete the upload.
                CompleteMultipartUploadRequest completeRequest = new CompleteMultipartUploadRequest
                    {
                        BucketName = bucketName,
                        Key = keyName,
                        UploadId = initResponse.UploadId
                     };
                completeRequest.AddPartETags(uploadResponses);

                // Complete the upload.
                CompleteMultipartUploadResponse completeUploadResponse =
                    await s3Client.CompleteMultipartUploadAsync(completeRequest);
            }
            catch (Exception exception)
            {
                Console.WriteLine("An AmazonS3Exception was thrown: { 0}", exception.Message);

                // Abort the upload.
                AbortMultipartUploadRequest abortMPURequest = new AbortMultipartUploadRequest
                {
                    BucketName = bucketName,
                    Key = keyName,
                    UploadId = initResponse.UploadId
                };
               await s3Client.AbortMultipartUploadAsync(abortMPURequest);
            }
        }
        public static void UploadPartProgressEventCallback(object sender, StreamTransferProgressArgs e)
        {
            // Process event. 
            Console.WriteLine("{0}/{1}", e.TransferredBytes, e.TotalBytes);
        }
    }
}

本主题说明如何使用适用于 PHP 的 AWS 开发工具包（版本 3）中的低级别 uploadPart 方法来以分段形式上传文件。此部分假定您已按照使用适用于 PHP 的 AWS 开发工具包和运行 PHP 示例中的说明执行操作，并正确安装了适用于 PHP 的 AWS 开发工具包。

以下 PHP 示例使用低级别 PHP API 分段上传将文件上传到 Amazon S3 存储桶。有关运行本指南中的 PHP 示例的信息，请参阅运行 PHP 示例。

 require 'vendor/autoload.php';

use Aws\S3\S3Client;

$bucket = '*** Your Bucket Name ***';
$keyname = '*** Your Object Key ***';
$filename = '*** Path to and Name of the File to Upload ***';

$s3 = new S3Client([
    'version' => 'latest',
    'region'  => 'us-east-1'
]);

$result = $s3->createMultipartUpload([
    'Bucket'       => $bucket,
    'Key'          => $keyname,
    'StorageClass' => 'REDUCED_REDUNDANCY',
    'Metadata'     => [
        'param1' => 'value 1',
        'param2' => 'value 2',
        'param3' => 'value 3'
    ]
]);
$uploadId = $result['UploadId'];

// Upload the file in parts.
try {
    $file = fopen($filename, 'r');
    $partNumber = 1;
    while (!feof($file)) {
        $result = $s3->uploadPart([
            'Bucket'     => $bucket,
            'Key'        => $keyname,
            'UploadId'   => $uploadId,
            'PartNumber' => $partNumber,
            'Body'       => fread($file, 5 * 1024 * 1024),
        ]);
        $parts['Parts'][$partNumber] = [
            'PartNumber' => $partNumber,
            'ETag' => $result['ETag'],
        ];
        $partNumber++;

        echo "Uploading part {$partNumber} of {$filename}." . PHP_EOL;
    }
    fclose($file);
} catch (S3Exception $e) {
    $result = $s3->abortMultipartUpload([
        'Bucket'   => $bucket,
        'Key'      => $keyname,
        'UploadId' => $uploadId
    ]);

    echo "Upload of {$filename} failed." . PHP_EOL;
}

// Complete the multipart upload.
$result = $s3->completeMultipartUpload([
    'Bucket'   => $bucket,
    'Key'      => $keyname,
    'UploadId' => $uploadId,
    'MultipartUpload'    => $parts,
]);
$url = $result['Location'];

echo "Uploaded {$filename} to {$url}." . PHP_EOL;