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package main
// copied from https://github.com/apoorvam/aws-s3-multipart-upload
import (
"bytes"
"flag"
"fmt"
"net/http"
"os"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
)
const (
maxPartSize = int64(5 * 1024 * 1024)
maxRetries = 3
awsAccessKeyID = "any"
awsSecretAccessKey = "any"
awsBucketRegion = "us‑west‑1"
awsBucketName = "bucket1"
)
var (
filename = flag.String("f", "", "the file name")
)
func main() {
flag.Parse()
creds := credentials.NewStaticCredentials(awsAccessKeyID, awsSecretAccessKey, "")
_, err := creds.Get()
if err != nil {
fmt.Printf("bad credentials: %s", err)
}
cfg := aws.NewConfig().WithRegion(awsBucketRegion).WithCredentials(creds).WithDisableSSL(true).WithEndpoint("localhost:8333").WithS3ForcePathStyle(true)
svc := s3.New(session.New(), cfg)
file, err := os.Open(*filename)
if err != nil {
fmt.Printf("err opening file: %s", err)
return
}
defer file.Close()
fileInfo, _ := file.Stat()
size := fileInfo.Size()
buffer := make([]byte, size)
fileType := http.DetectContentType(buffer)
file.Read(buffer)
path := "/media/" + file.Name()
input := &s3.CreateMultipartUploadInput{
Bucket: aws.String(awsBucketName),
Key: aws.String(path),
ContentType: aws.String(fileType),
}
resp, err := svc.CreateMultipartUpload(input)
if err != nil {
fmt.Println(err.Error())
return
}
fmt.Println("Created multipart upload request")
var curr, partLength int64
var remaining = size
var completedParts []*s3.CompletedPart
partNumber := 1
for curr = 0; remaining != 0; curr += partLength {
if remaining < maxPartSize {
partLength = remaining
} else {
partLength = maxPartSize
}
completedPart, err := uploadPart(svc, resp, buffer[curr:curr+partLength], partNumber)
if err != nil {
fmt.Println(err.Error())
err := abortMultipartUpload(svc, resp)
if err != nil {
fmt.Println(err.Error())
}
return
}
remaining -= partLength
partNumber++
completedParts = append(completedParts, completedPart)
}
// list parts
parts, err := svc.ListParts(&s3.ListPartsInput{
Bucket: input.Bucket,
Key: input.Key,
MaxParts: nil,
PartNumberMarker: nil,
RequestPayer: nil,
UploadId: resp.UploadId,
})
if err != nil {
fmt.Println(err.Error())
return
}
fmt.Printf("list parts: %d\n", len(parts.Parts))
for i, part := range parts.Parts {
fmt.Printf("part %d: %v\n", i, part)
}
completeResponse, err := completeMultipartUpload(svc, resp, completedParts)
if err != nil {
fmt.Println(err.Error())
return
}
fmt.Printf("Successfully uploaded file: %s\n", completeResponse.String())
}
func completeMultipartUpload(svc *s3.S3, resp *s3.CreateMultipartUploadOutput, completedParts []*s3.CompletedPart) (*s3.CompleteMultipartUploadOutput, error) {
completeInput := &s3.CompleteMultipartUploadInput{
Bucket: resp.Bucket,
Key: resp.Key,
UploadId: resp.UploadId,
MultipartUpload: &s3.CompletedMultipartUpload{
Parts: completedParts,
},
}
return svc.CompleteMultipartUpload(completeInput)
}
func uploadPart(svc *s3.S3, resp *s3.CreateMultipartUploadOutput, fileBytes []byte, partNumber int) (*s3.CompletedPart, error) {
tryNum := 1
partInput := &s3.UploadPartInput{
Body: bytes.NewReader(fileBytes),
Bucket: resp.Bucket,
Key: resp.Key,
PartNumber: aws.Int64(int64(partNumber)),
UploadId: resp.UploadId,
ContentLength: aws.Int64(int64(len(fileBytes))),
}
for tryNum <= maxRetries {
uploadResult, err := svc.UploadPart(partInput)
if err != nil {
if tryNum == maxRetries {
if aerr, ok := err.(awserr.Error); ok {
return nil, aerr
}
return nil, err
}
fmt.Printf("Retrying to upload part #%v\n", partNumber)
tryNum++
} else {
fmt.Printf("Uploaded part #%v\n", partNumber)
return &s3.CompletedPart{
ETag: uploadResult.ETag,
PartNumber: aws.Int64(int64(partNumber)),
}, nil
}
}
return nil, nil
}
func abortMultipartUpload(svc *s3.S3, resp *s3.CreateMultipartUploadOutput) error {
fmt.Println("Aborting multipart upload for UploadId#" + *resp.UploadId)
abortInput := &s3.AbortMultipartUploadInput{
Bucket: resp.Bucket,
Key: resp.Key,
UploadId: resp.UploadId,
}
_, err := svc.AbortMultipartUpload(abortInput)
return err
}
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