Golang 调用 aws-sdk 操作 S3对象存储

前言

因为业务问题，要写一个S3对象存储管理代码，由于一直写Go，所以这次采用了Go，Go嘛，快，自带多线程，这种好处就不用多说了吧。

基础的功能

1. 查看S3中包含的bucket
2. bucket中的文件/文件夹
3. bucket的删除
4. bucket的创建
5. bucket的文件上传
6. bucket的文件下载
7. bucket的文件删除

aws-sdk 的安装

玩Golang你还能不会那啥？对吧，那啥？那飞机！那飞机场，安上~

go get github.com/aws/aws-sdk-go

aws-sdk-go 的基础使用

构建基础的S3连接

访问S3的时候，咱们需要access_key，secret_key，对象存储访问IP这三个参数，我们首先要创建一个aws的config，说白了，我们需要定义aws的配置，这样它才知道要怎么访问，去哪里访问等问题。
构建一个S3连接代码如下

package main import ( "fmt" "os" "github.com/aws/aws-sdk-go/aws" "github.com/aws/aws-sdk-go/aws/credentials" _ "github.com/aws/aws-sdk-go/service/s3/s3manager" "github.com/aws/aws-sdk-go/aws/session" "github.com/aws/aws-sdk-go/service/s3" ) func main() { access_key := "xxxxxxxxxxxxx" secret_key := "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" end_point := "http://xx.xx.xx.xx:7480" //endpoint设置，不要动 sess, err := session.NewSession(&aws.Config{ Credentials: credentials.NewStaticCredentials(access_key, secret_key, ""), Endpoint: aws.String(end_point), Region: aws.String("us-east-1"), DisableSSL: aws.Bool(true), S3ForcePathStyle: aws.Bool(false), //virtual-host style方式，不要修改 }) }

这时候需要你自己去定义一下access_key，secret_key，end_point这三个参数
接下来所有的代码，都是以这个连接模板，为核心，后面我就用同上代替配置，请注意！
所有的代码都传到GIT上了，到时候会给出地址，不懂得copy下来吧！

查看S3中包含的bucket

查看所有的bucket

package main import ( 导入包同上 ) func exitErrorf(msg string, args ...interface{}) { fmt.Fprintf(os.Stderr, msg+"\n", args...) os.Exit(1) } func main() { 配置同上 svc := s3.New(sess) result, err := svc.ListBuckets(nil) if err != nil { exitErrorf("Unable to list buckets, %v", err) } fmt.Println("Buckets:") for _, b := range result.Buckets { fmt.Printf("* %s created on %s\n", aws.StringValue(b.Name), aws.TimeValue(b.CreationDate)) } for _, b := range result.Buckets { fmt.Printf("%s\n", aws.StringValue(b.Name)) } }

列出bucket中的文件/文件夹

查看某个bucket中包含的文件/文件夹

package main import ( "github.com/aws/aws-sdk-go/aws" "github.com/aws/aws-sdk-go/aws/session" "github.com/aws/aws-sdk-go/aws/credentials" "github.com/aws/aws-sdk-go/service/s3" "fmt" "os" ) func exitErrorf(msg string, args ...interface{}) { fmt.Fprintf(os.Stderr, msg+"\n", args...) os.Exit(1) } func main() { 配置同上 // bucket后跟，go run ....go bucketname bucket := os.Args[1] fmt.Printf(bucket) fmt.Printf("\n") svc := s3.New(sess) params := &s3.ListObjectsInput{ Bucket: aws.String(bucket), } resp, err := svc.ListObjects(params) if err != nil { exitErrorf("Unable to list items in bucket %q, %v", bucket, err) } for _, item := range resp.Contents { fmt.Println("Name: ", *item.Key) fmt.Println("Last modified:", *item.LastModified) fmt.Println("Size: ", *item.Size) fmt.Println("Storage class:", *item.StorageClass) fmt.Println("") } }

bucket的创建

创建bucket

package main import ( 导包同上 ) func exitErrorf(msg string, args ...interface{}) { fmt.Fprintf(os.Stderr, msg+"\n", args...) os.Exit(1) } func main() { 配置同上 bucket := os.Args[1] if len(os.Args) != 2 { exitErrorf("Bucket name required\nUsage: %s bucket_name", os.Args[0]) } // Create S3 service client svc := s3.New(sess) params := &s3.CreateBucketInput{ Bucket: aws.String(bucket), } _, err = svc.CreateBucket(params) if err != nil { exitErrorf("Unable to create bucket %q, %v", bucket, err) } // Wait until bucket is created before finishing fmt.Printf("Waiting for bucket %q to be created...\n", bucket) err = svc.WaitUntilBucketExists(&s3.HeadBucketInput{ Bucket: aws.String(bucket), }) if err != nil { exitErrorf("Error occurred while waiting for bucket to be created, %v", bucket) } fmt.Printf("Bucket %q successfully created\n", bucket) }

bucket的文件上传

往某个固定的bucket里传文件

package main import ( "github.com/aws/aws-sdk-go/aws" "github.com/aws/aws-sdk-go/aws/session" "github.com/aws/aws-sdk-go/aws/credentials" "github.com/aws/aws-sdk-go/service/s3/s3manager" "fmt" "os" ) func exitErrorf(msg string, args ...interface{}) { fmt.Fprintf(os.Stderr, msg+"\n", args...) os.Exit(1) } func main() { 配置同上 if len(os.Args) != 3 { exitErrorf("bucket and file name required\nUsage: %s bucket_name filename", os.Args[0]) } bucket := os.Args[1] filename := os.Args[2] file, err := os.Open(filename) if err != nil { exitErrorf("Unable to open file %q, %v", err) } defer file.Close() uploader := s3manager.NewUploader(sess) _, err = uploader.Upload(&s3manager.UploadInput{ Bucket: aws.String(bucket), Key: aws.String(filename), Body: file, }) if err != nil { // Print the error and exit. exitErrorf("Unable to upload %q to %q, %v", filename, bucket, err) } fmt.Printf("Successfully uploaded %q to %q\n", filename, bucket) }

bucket的文件下载

下载某个bucket中的某个文件

package main import ( "github.com/aws/aws-sdk-go/aws" "github.com/aws/aws-sdk-go/aws/session" "github.com/aws/aws-sdk-go/aws/credentials" "github.com/aws/aws-sdk-go/service/s3" "github.com/aws/aws-sdk-go/service/s3/s3manager" "fmt" "os" ) func exitErrorf(msg string, args ...interface{}) { fmt.Fprintf(os.Stderr, msg+"\n", args...) os.Exit(1) } func main() { 配置同上 if len(os.Args) != 3 { exitErrorf("Bucket and item names required\nUsage: %s bucket_name item_name", os.Args[0]) } bucket := os.Args[1] item := os.Args[2] file, err := os.Create(item) if err != nil { exitErrorf("Unable to open file %q, %v", err) } defer file.Close() downloader := s3manager.NewDownloader(sess) numBytes, err := downloader.Download(file, &s3.GetObjectInput{ Bucket: aws.String(bucket), Key: aws.String(item), }) if err != nil { exitErrorf("Unable to download item %q, %v", item, err) } fmt.Println("Downloaded", file.Name(), numBytes, "bytes") } 

bucket的文件删除

删除某个bucket里面的某个文件

package main import ( "github.com/aws/aws-sdk-go/aws" "github.com/aws/aws-sdk-go/aws/session" "github.com/aws/aws-sdk-go/aws/credentials" "github.com/aws/aws-sdk-go/service/s3" "fmt" "os" ) func exitErrorf(msg string, args ...interface{}) { fmt.Fprintf(os.Stderr, msg+"\n", args...) os.Exit(1) } func main() { 配置同上 if len(os.Args) != 3 { exitErrorf("Bucket and object name required\nUsage: %s bucket_name object_name", os.Args[0]) } bucket := os.Args[1] obj := os.Args[2] svc := s3.New(sess) _, err = svc.DeleteObject(&s3.DeleteObjectInput{Bucket: aws.String(bucket), Key: aws.String(obj)}) if err != nil { exitErrorf("Unable to delete object %q from bucket %q, %v", obj, bucket, err) } err = svc.WaitUntilObjectNotExists(&s3.HeadObjectInput{ Bucket: aws.String(bucket), Key: aws.String(obj), }) fmt.Printf("Object %q successfully deleted\n", obj) }

代码所在地

https://github.com/Alexanderklau/Go_poject/tree/master/Go-Storage