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
- 查看S3中包含的bucket
- bucket中的文件/文件夹
- bucket的删除
- bucket的创建
- bucket的文件上传
- bucket的文件下载
- 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
