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S3Utils.go
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S3Utils.go
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package S3utils
import (
"bytes"
"context"
"crypto/md5"
awsutils "github.com/alessiosavi/GoGPUtils/aws"
fileutils "github.com/alessiosavi/GoGPUtils/files"
"github.com/alessiosavi/GoGPUtils/helper"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/aws/aws-sdk-go-v2/service/s3/types"
"github.com/schollz/progressbar/v3"
"golang.org/x/net/html/charset"
"io"
"log"
"net/http"
"os"
"path"
"sort"
"strings"
"sync"
"time"
)
var S3Client *s3.Client = nil
var once sync.Once
func init() {
once.Do(func() {
cfg, err := awsutils.New()
if err != nil {
panic(err)
}
S3Client = s3.New(s3.Options{Credentials: cfg.Credentials, Region: cfg.Region, RetryMaxAttempts: 5, RetryMode: aws.RetryModeAdaptive})
})
}
func GetObject(bucket, fileName string) ([]byte, error) {
object, err := S3Client.GetObject(context.Background(), &s3.GetObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(fileName)})
if err != nil {
return nil, err
}
return io.ReadAll(object.Body)
}
func Move(bucket, filename, targetName string) error {
if err := CopyObject(bucket, bucket, filename, targetName); err != nil {
return err
}
return DeleteObject(bucket, filename)
}
func PutObject(bucket, filename string, data []byte) error {
h := md5.New()
var sum []byte = nil
if _, err := h.Write(data); err != nil {
sum = h.Sum(nil)
}
contentType := http.DetectContentType(data)
_, enc, ok := charset.DetermineEncoding(data, contentType)
var encoding *string = nil
if ok {
encoding = aws.String(enc)
}
uploader := manager.NewUploader(S3Client)
_, err := uploader.Upload(context.Background(), &s3.PutObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(filename),
Body: io.NopCloser(bytes.NewReader(data)),
ContentEncoding: encoding,
ContentMD5: aws.String(string(sum)),
ContentType: aws.String(contentType),
})
return err
}
func DeleteObject(bucket, key string) error {
_, err := S3Client.DeleteObject(context.Background(), &s3.DeleteObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
})
return err
}
// DeleteObjects is delegated to remove the given data (value -> []string) from the given bucket (key -> string)
func DeleteObjects(data map[string][]string) error {
// TODO: Mange more than 1000 keys and use Thread
for k := range data {
var toDelete = make([][]string, 0)
maxIteration := len(data[k]) / 1000
for i := 0; i < maxIteration; i++ {
toDelete = append(toDelete, data[k][1000*i:1000*(i+1)])
}
toDelete = append(toDelete, data[k][maxIteration*1000:])
for i := range toDelete {
var del = make([]types.ObjectIdentifier, len(toDelete[i]), len(toDelete[i]))
for j, v := range toDelete[i] {
del[j] = types.ObjectIdentifier{Key: aws.String(v)}
}
objects, err := S3Client.DeleteObjects(context.Background(), &s3.DeleteObjectsInput{
Bucket: aws.String(k),
Delete: &types.Delete{Objects: del},
})
if err != nil {
panic(err)
}
if len(objects.Errors) > 0 {
log.Println("Error for the following data:", helper.MarshalIndent(objects.Errors))
}
if len(objects.Deleted) > 0 {
log.Println("Deleted:", helper.MarshalIndent(objects.Deleted))
}
}
}
return nil
}
func PutObjectStream(bucket, filename string, stream io.ReadCloser, contentType, encoding, md5 *string) error {
defer stream.Close()
uploader := manager.NewUploader(S3Client)
uploader.Concurrency = 10
_, err := uploader.Upload(context.Background(), &s3.PutObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(filename),
Body: stream,
ContentEncoding: encoding,
ContentMD5: md5,
ContentType: contentType,
})
return err
}
// ListBucketObjectsDetails is delegated to list all the objects (details) in the given bucket. Prefix is optional. The result is return ordered by the last modified
func ListBucketObjectsDetails(bucket, prefix string) ([]types.Object, error) {
objects, err := S3Client.ListObjectsV2(context.Background(), &s3.ListObjectsV2Input{
Bucket: aws.String(bucket),
Prefix: aws.String(prefix),
})
if err != nil {
return nil, err
}
var buckets []types.Object
buckets = append(buckets, objects.Contents...)
continuationToken := objects.NextContinuationToken
truncated := objects.IsTruncated
for *truncated {
newObjects, err := S3Client.ListObjectsV2(context.Background(), &s3.ListObjectsV2Input{
Bucket: aws.String(bucket),
Prefix: aws.String(prefix),
ContinuationToken: continuationToken,
})
if err != nil {
return nil, err
}
continuationToken = newObjects.NextContinuationToken
buckets = append(buckets, newObjects.Contents...)
truncated = newObjects.IsTruncated
}
sort.Slice(buckets, func(i, j int) bool {
return buckets[i].LastModified.Before(*buckets[i].LastModified)
})
return buckets, nil
}
// ListBucketObjects is delegated to list all the objects (name only) in the given bucket. Prefix is optional. The result is return ordered by the last modified
func ListBucketObjects(bucket, prefix string) ([]string, error) {
objects, err := ListBucketObjectsDetails(bucket, prefix)
if err != nil {
return nil, err
}
var data = make([]string, len(objects))
for i := range objects {
data[i] = *objects[i].Key
}
return data, nil
}
func CopyObject(bucketSource, bucketTarget, keySource, keyTarget string) error {
if _, err := S3Client.CopyObject(context.Background(), &s3.CopyObjectInput{
Bucket: aws.String(bucketTarget),
CopySource: aws.String(path.Join(bucketSource, keySource)),
Key: aws.String(keyTarget),
}); err != nil {
return err
}
return nil
}
func ObjectExists(bucket, key string) bool {
if _, err := S3Client.HeadObject(context.Background(), &s3.HeadObjectInput{Bucket: aws.String(bucket), Key: aws.String(key)}); err != nil {
return false
}
return true
}
func SyncBucket(bucket, prefix string, bucketsTarget ...string) ([]string, error) {
var fileNotSynced []string
objects, err := ListBucketObjects(bucket, prefix)
if err != nil {
return nil, err
}
// Cache the name of the files for the given bucket, by this way we avoid unnecessary copy/head operation
// NOTE: The file will not be copied if it has the same name but with different content
var cache = make(map[string]map[string]struct{})
// Iterate the buckets and save the file name in a map
for _, b := range bucketsTarget {
bucketObjects, err := ListBucketObjects(b, "")
if err != nil {
return nil, err
}
cache[b] = make(map[string]struct{})
for i := range bucketObjects {
cache[b][bucketObjects[i]] = struct{}{}
}
}
for _, object := range objects {
for _, bucketTarget := range bucketsTarget {
//if IsDifferent(bucket, bucketTarget, object, object) {
if _, ok := cache[bucketTarget][object]; !ok { // File not exists
log.Printf("Copying %s\n", path.Join(bucket, object))
if err = CopyObject(bucket, bucketTarget, object, object); err != nil {
fileNotSynced = append(fileNotSynced, object)
}
}
//} else {
// log.Printf("File %s skipped cause it already exists\n", path.Join(bucket, object))
//}
}
}
return fileNotSynced, nil
}
func HeadObject(bucket, key string) (*s3.HeadObjectOutput, error) {
return S3Client.HeadObject(context.Background(), &s3.HeadObjectInput{Bucket: aws.String(bucket), Key: aws.String(key)})
}
func IsDifferent(bucket_base, bucket_target, key_base, key_target string) bool {
var (
head_base, head_target *s3.HeadObjectOutput
err1, err2 error
)
var wg sync.WaitGroup
wg.Add(2)
go func() {
head_base, err1 = HeadObject(bucket_base, key_base)
wg.Done()
}()
go func() {
head_target, err2 = HeadObject(bucket_target, key_target)
wg.Done()
}()
wg.Wait()
if err1 != nil || err2 != nil {
if err1 != nil {
log.Println("INPUT: ", bucket_base, key_base)
log.Println(err1)
} else {
log.Println("INPUT: ", bucket_target, key_target)
log.Println(err2)
}
return true
}
return head_base.ContentLength != head_target.ContentLength || *head_base.ETag != *head_target.ETag
}
func IsDifferentLegacy(bucket_base, bucket_target, key_base, key_target string) bool {
head_base, err := S3Client.HeadObject(context.Background(), &s3.HeadObjectInput{Bucket: aws.String(bucket_base), Key: aws.String(key_base)})
if err != nil {
return true
}
head_target, err := S3Client.HeadObject(context.Background(), &s3.HeadObjectInput{Bucket: aws.String(bucket_target), Key: aws.String(key_target)})
if err != nil {
return true
}
return *head_base.ETag != *head_target.ETag || head_base.ContentLength != head_target.ContentLength
}
// FIXME: Use a list of string as prefix
func GetAfterDate(bucket, prefix string, date time.Time) ([]types.Object, error) {
details, err := ListBucketObjectsDetails(bucket, prefix)
if err != nil {
return nil, err
}
var res []types.Object
sort.Slice(details, func(i, j int) bool {
return details[i].LastModified.Before(*details[j].LastModified)
})
for _, detail := range details {
if detail.LastModified.After(date) {
res = append(res, detail)
}
}
return res, nil
}
func GetBetweenDate(bucket, prefix string, start, stop time.Time) ([]string, error) {
details, err := ListBucketObjectsDetails(bucket, prefix)
if err != nil {
return nil, err
}
var res []string
for _, detail := range details {
if detail.LastModified.After(start) && detail.LastModified.Before(stop) {
res = append(res, *detail.Key)
}
}
return res, nil
}
func SyncAfterDate(bucket, prefix, localPath string, date time.Time) error {
details, err := ListBucketObjectsDetails(bucket, strings.TrimLeft(prefix, "/"))
if err != nil {
return err
}
var detailsAfter []types.Object
for _, detail := range details {
if detail.LastModified.After(date) {
detailsAfter = append(detailsAfter, detail)
}
}
details = nil
bar := progressbar.Default(int64(len(detailsAfter)))
defer bar.Close()
for _, detail := range detailsAfter {
bar.Describe(*detail.Key)
object, err := GetObject(bucket, *detail.Key)
if err != nil {
return err
}
basepath := path.Join(localPath, path.Dir(*detail.Key))
if !fileutils.IsDir(basepath) {
if err = os.MkdirAll(basepath, 0755); err != nil {
return err
}
}
f := path.Join(basepath, path.Base(*detail.Key))
if err = os.WriteFile(f, object, 0755); err != nil {
return err
}
if err = os.Chtimes(f, *detail.LastModified, *detail.LastModified); err != nil {
log.Println("Unable to set time for file,", f, "ERR:", err.Error())
}
bar.Add(1)
}
return nil
}
// ParseS3Path is delegated to return bucket name and filename of a given s3 path
func ParseS3Path(p string) (string, string) {
p = strings.TrimLeft(p, "s3://")
split := strings.Split(p, "/")
return split[0], path.Clean(strings.Join(split[1:], "/"))
}