Go拷贝文件

您可以使用以下代码进行拷贝对象。

package main

import (
	"context"
	"flag"
	"log"

	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials"
)

// 定义全局变量
var (
	region         string // 存储区域
	srcBucketName  string // 源存储空间名称
	srcObjectName  string // 源对象名称
	destBucketName string // 目标存储空间名称
	destObjectName string // 目标对象名称
)

// init函数用于初始化命令行参数
func init() {
	flag.StringVar(&region, "region", "", "The region in which the bucket is located.")
	flag.StringVar(&srcBucketName, "src-bucket", "", "The name of the source bucket.")
	flag.StringVar(&srcObjectName, "src-object", "", "The name of the source object.")
	flag.StringVar(&destBucketName, "dest-bucket", "", "The name of the destination bucket.")
	flag.StringVar(&destObjectName, "dest-object", "", "The name of the destination object.")
}

func main() {
	// 解析命令行参数
	flag.Parse()

	// 检查源bucket名称是否为空
	if len(srcBucketName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, source bucket name required")
	}

	// 检查region是否为空
	if len(region) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, region required")
	}

	// 如果目标bucket名称未指定，则使用源bucket名称
	if len(destBucketName) == 0 {
		destBucketName = srcBucketName
	}

	// 检查源object名称是否为空
	if len(srcObjectName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, source object name required")
	}

	// 检查目标object名称是否为空
	if len(destObjectName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, destination object name required")
	}

	// 加载默认配置并设置凭证提供者和区域
	cfg := oss.LoadDefaultConfig().
		WithCredentialsProvider(credentials.NewEnvironmentVariableCredentialsProvider()).
		WithRegion(region)

	// 创建OSS客户端
	client := oss.NewClient(cfg)

	// 创建复制对象请求
	copyRequest := &oss.CopyObjectRequest{
		Bucket:           oss.Ptr(destBucketName),            // 目标存储空间名称
		Key:              oss.Ptr(destObjectName),            // 目标对象名称
		SourceKey:        oss.Ptr(srcObjectName),             // 源对象名称
		SourceBucket:     oss.Ptr(srcBucketName),             // 源存储空间名称
		SourceVersionId:  oss.Ptr("yourVersionId"),           // 填写实际的源对象的版本ID
		StorageClass:     oss.StorageClassStandard,           // 设置存储类型为标准类型
		TaggingDirective: oss.Ptr("Replace"),                 // 不拷贝源对象标签
		Tagging:          oss.Ptr("tag1=value1&tag2=value2"), // 填写实际的目标对象标签
	}

	// 执行复制对象操作并处理结果
	copyResult, err := client.CopyObject(context.TODO(), copyRequest)
	if err != nil {
		log.Fatalf("failed to copy object: %v", err)
	}

	// 打印拷贝对象的versionId
	log.Printf("copy object result versionId:%#v\n", *copyResult.VersionId)

}

您可以使用以下代码进行分片拷贝对象。

package main

import (
	"context"
	"flag"
	"log"
	"sync"

	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials"
)

// 定义全局变量
var (
	region         string // 存储区域
	srcBucketName  string // 源存储空间名称
	srcObjectName  string // 源对象名称
	destBucketName string // 目标存储空间名称
	destObjectName string // 目标对象名称
)

// init函数用于初始化命令行参数
func init() {
	flag.StringVar(&region, "region", "", "The region in which the bucket is located.")
	flag.StringVar(&srcBucketName, "src-bucket", "", "The name of the source bucket.")
	flag.StringVar(&srcObjectName, "src-object", "", "The name of the source object.")
	flag.StringVar(&destBucketName, "dest-bucket", "", "The name of the destination bucket.")
	flag.StringVar(&destObjectName, "dest-object", "", "The name of the destination object.")
}

func main() {
	// 解析命令行参数
	flag.Parse()

	// 定义上传ID
	var uploadId string

	// 检查源存储空间名称是否为空
	if len(srcBucketName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, source bucket name required")
	}

	// 检查存储区域是否为空
	if len(region) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, region required")
	}

	// 如果目标存储空间名称未指定，则使用源存储空间名称
	if len(destBucketName) == 0 {
		destBucketName = srcBucketName
	}

	// 检查源对象名称是否为空
	if len(srcObjectName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, source object name required")
	}

	// 检查目标对象名称是否为空
	if len(destObjectName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, destination object name required")
	}

	// 加载默认配置并设置凭证提供者和区域
	cfg := oss.LoadDefaultConfig().
		WithCredentialsProvider(credentials.NewEnvironmentVariableCredentialsProvider()).
		WithRegion(region)

	// 创建OSS客户端
	client := oss.NewClient(cfg)

	// 初始化分片上传请求
	initRequest := &oss.InitiateMultipartUploadRequest{
		Bucket: oss.Ptr(destBucketName),
		Key:    oss.Ptr(destObjectName),
	}
	initResult, err := client.InitiateMultipartUpload(context.TODO(), initRequest)
	if err != nil {
		log.Fatalf("failed to initiate multipart upload %v", err)
	}

	// 打印初始化分片上传的结果
	log.Printf("initiate multipart upload result:%#v\n", *initResult.UploadId)
	uploadId = *initResult.UploadId

	// 初始化等待组和互斥锁
	var wg sync.WaitGroup
	var parts []oss.UploadPart
	count := 3
	var mu sync.Mutex

	// 启动多个goroutine进行分片上传
	for i := 0; i < count; i++ {
		wg.Add(1)
		go func(partNumber int, i int) {
			defer wg.Done()

			// 创建分片上传请求
			partRequest := &oss.UploadPartCopyRequest{
				Bucket:          oss.Ptr(destBucketName),  // 目标存储空间名称
				Key:             oss.Ptr(destObjectName),  // 目标对象名称
				SourceBucket:    oss.Ptr(srcBucketName),   // 源存储空间名称
				SourceKey:       oss.Ptr(srcObjectName),   // 源对象名称
				SourceVersionId: oss.Ptr("yourVersionId"), // 源对象版本ID
				PartNumber:      int32(partNumber),        // 分片编号
				UploadId:        oss.Ptr(uploadId),        // 上传ID
			}

			// 发送分片上传请求
			partResult, err := client.UploadPartCopy(context.TODO(), partRequest)
			if err != nil {
				log.Fatalf("failed to upload part copy %d: %v", partNumber, err)
			}

			// 记录分片上传结果
			part := oss.UploadPart{
				PartNumber: partRequest.PartNumber,
				ETag:       partResult.ETag,
			}

			// 使用互斥锁保护共享数据
			mu.Lock()
			parts = append(parts, part)
			mu.Unlock()
		}(i+1, i)
	}

	// 等待所有goroutine完成
	wg.Wait()

	// 完成分片上传请求
	request := &oss.CompleteMultipartUploadRequest{
		Bucket:   oss.Ptr(destBucketName),
		Key:      oss.Ptr(destObjectName),
		UploadId: oss.Ptr(uploadId),
		CompleteMultipartUpload: &oss.CompleteMultipartUpload{
			Parts: parts,
		},
	}
	result, err := client.CompleteMultipartUpload(context.TODO(), request)
	if err != nil {
		log.Fatalf("failed to complete multipart upload %v", err)
	}

	// 打印完成分片拷贝上传的versionId
	log.Printf("complete multipart upload result versionId:%#v\n", *result.VersionId)
}