mirror of
https://github.com/genuinetools/reg.git
synced 2024-08-23 15:00:22 -04:00
1325 lines
37 KiB
Go
1325 lines
37 KiB
Go
![]() |
// Package s3 provides a storagedriver.StorageDriver implementation to
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// store blobs in Amazon S3 cloud storage.
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//
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// This package leverages the official aws client library for interfacing with
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// S3.
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//
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// Because S3 is a key, value store the Stat call does not support last modification
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// time for directories (directories are an abstraction for key, value stores)
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//
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// Keep in mind that S3 guarantees only read-after-write consistency for new
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// objects, but no read-after-update or list-after-write consistency.
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package s3
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import (
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"bytes"
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"context"
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"fmt"
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"io"
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"io/ioutil"
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"math"
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"net/http"
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"reflect"
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"sort"
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"strconv"
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"strings"
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"time"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/aws/credentials"
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"github.com/aws/aws-sdk-go/aws/credentials/ec2rolecreds"
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"github.com/aws/aws-sdk-go/aws/ec2metadata"
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"github.com/aws/aws-sdk-go/aws/request"
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"github.com/aws/aws-sdk-go/aws/session"
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"github.com/aws/aws-sdk-go/service/s3"
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dcontext "github.com/docker/distribution/context"
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"github.com/docker/distribution/registry/client/transport"
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storagedriver "github.com/docker/distribution/registry/storage/driver"
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"github.com/docker/distribution/registry/storage/driver/base"
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"github.com/docker/distribution/registry/storage/driver/factory"
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)
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const driverName = "s3aws"
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// minChunkSize defines the minimum multipart upload chunk size
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// S3 API requires multipart upload chunks to be at least 5MB
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const minChunkSize = 5 << 20
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// maxChunkSize defines the maximum multipart upload chunk size allowed by S3.
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const maxChunkSize = 5 << 30
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const defaultChunkSize = 2 * minChunkSize
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const (
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// defaultMultipartCopyChunkSize defines the default chunk size for all
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// but the last Upload Part - Copy operation of a multipart copy.
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// Empirically, 32 MB is optimal.
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defaultMultipartCopyChunkSize = 32 << 20
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// defaultMultipartCopyMaxConcurrency defines the default maximum number
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// of concurrent Upload Part - Copy operations for a multipart copy.
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defaultMultipartCopyMaxConcurrency = 100
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// defaultMultipartCopyThresholdSize defines the default object size
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// above which multipart copy will be used. (PUT Object - Copy is used
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// for objects at or below this size.) Empirically, 32 MB is optimal.
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defaultMultipartCopyThresholdSize = 32 << 20
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)
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// listMax is the largest amount of objects you can request from S3 in a list call
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const listMax = 1000
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// noStorageClass defines the value to be used if storage class is not supported by the S3 endpoint
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const noStorageClass = "NONE"
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// validRegions maps known s3 region identifiers to region descriptors
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var validRegions = map[string]struct{}{}
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// validObjectACLs contains known s3 object Acls
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var validObjectACLs = map[string]struct{}{}
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//DriverParameters A struct that encapsulates all of the driver parameters after all values have been set
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type DriverParameters struct {
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AccessKey string
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SecretKey string
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Bucket string
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Region string
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RegionEndpoint string
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Encrypt bool
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KeyID string
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Secure bool
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V4Auth bool
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ChunkSize int64
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MultipartCopyChunkSize int64
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MultipartCopyMaxConcurrency int64
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MultipartCopyThresholdSize int64
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RootDirectory string
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StorageClass string
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UserAgent string
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ObjectACL string
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SessionToken string
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}
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func init() {
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for _, region := range []string{
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"us-east-1",
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"us-east-2",
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"us-west-1",
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"us-west-2",
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"eu-west-1",
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"eu-west-2",
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"eu-central-1",
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"ap-south-1",
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"ap-southeast-1",
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"ap-southeast-2",
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"ap-northeast-1",
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"ap-northeast-2",
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"sa-east-1",
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"cn-north-1",
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"us-gov-west-1",
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"ca-central-1",
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} {
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validRegions[region] = struct{}{}
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}
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for _, objectACL := range []string{
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s3.ObjectCannedACLPrivate,
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s3.ObjectCannedACLPublicRead,
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s3.ObjectCannedACLPublicReadWrite,
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s3.ObjectCannedACLAuthenticatedRead,
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s3.ObjectCannedACLAwsExecRead,
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s3.ObjectCannedACLBucketOwnerRead,
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s3.ObjectCannedACLBucketOwnerFullControl,
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} {
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validObjectACLs[objectACL] = struct{}{}
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}
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// Register this as the default s3 driver in addition to s3aws
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factory.Register("s3", &s3DriverFactory{})
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factory.Register(driverName, &s3DriverFactory{})
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}
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// s3DriverFactory implements the factory.StorageDriverFactory interface
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type s3DriverFactory struct{}
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func (factory *s3DriverFactory) Create(parameters map[string]interface{}) (storagedriver.StorageDriver, error) {
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return FromParameters(parameters)
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}
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type driver struct {
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S3 *s3.S3
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Bucket string
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ChunkSize int64
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Encrypt bool
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KeyID string
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MultipartCopyChunkSize int64
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MultipartCopyMaxConcurrency int64
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MultipartCopyThresholdSize int64
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RootDirectory string
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StorageClass string
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ObjectACL string
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}
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type baseEmbed struct {
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base.Base
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}
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// Driver is a storagedriver.StorageDriver implementation backed by Amazon S3
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// Objects are stored at absolute keys in the provided bucket.
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type Driver struct {
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baseEmbed
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}
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// FromParameters constructs a new Driver with a given parameters map
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// Required parameters:
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// - accesskey
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// - secretkey
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// - region
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// - bucket
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// - encrypt
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func FromParameters(parameters map[string]interface{}) (*Driver, error) {
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// Providing no values for these is valid in case the user is authenticating
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// with an IAM on an ec2 instance (in which case the instance credentials will
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// be summoned when GetAuth is called)
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accessKey := parameters["accesskey"]
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if accessKey == nil {
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accessKey = ""
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}
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secretKey := parameters["secretkey"]
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if secretKey == nil {
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secretKey = ""
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}
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regionEndpoint := parameters["regionendpoint"]
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if regionEndpoint == nil {
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regionEndpoint = ""
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}
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regionName, ok := parameters["region"]
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if regionName == nil || fmt.Sprint(regionName) == "" {
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return nil, fmt.Errorf("No region parameter provided")
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}
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region := fmt.Sprint(regionName)
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// Don't check the region value if a custom endpoint is provided.
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if regionEndpoint == "" {
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if _, ok = validRegions[region]; !ok {
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return nil, fmt.Errorf("Invalid region provided: %v", region)
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}
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}
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bucket := parameters["bucket"]
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if bucket == nil || fmt.Sprint(bucket) == "" {
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return nil, fmt.Errorf("No bucket parameter provided")
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}
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encryptBool := false
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encrypt := parameters["encrypt"]
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switch encrypt := encrypt.(type) {
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case string:
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b, err := strconv.ParseBool(encrypt)
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if err != nil {
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return nil, fmt.Errorf("The encrypt parameter should be a boolean")
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}
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encryptBool = b
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case bool:
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encryptBool = encrypt
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case nil:
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// do nothing
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default:
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return nil, fmt.Errorf("The encrypt parameter should be a boolean")
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}
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secureBool := true
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secure := parameters["secure"]
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switch secure := secure.(type) {
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case string:
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b, err := strconv.ParseBool(secure)
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if err != nil {
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return nil, fmt.Errorf("The secure parameter should be a boolean")
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}
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secureBool = b
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case bool:
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secureBool = secure
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case nil:
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// do nothing
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default:
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return nil, fmt.Errorf("The secure parameter should be a boolean")
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}
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v4Bool := true
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v4auth := parameters["v4auth"]
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switch v4auth := v4auth.(type) {
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case string:
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b, err := strconv.ParseBool(v4auth)
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if err != nil {
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return nil, fmt.Errorf("The v4auth parameter should be a boolean")
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}
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v4Bool = b
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case bool:
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v4Bool = v4auth
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case nil:
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// do nothing
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default:
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return nil, fmt.Errorf("The v4auth parameter should be a boolean")
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}
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keyID := parameters["keyid"]
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if keyID == nil {
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keyID = ""
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}
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chunkSize, err := getParameterAsInt64(parameters, "chunksize", defaultChunkSize, minChunkSize, maxChunkSize)
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if err != nil {
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return nil, err
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}
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multipartCopyChunkSize, err := getParameterAsInt64(parameters, "multipartcopychunksize", defaultMultipartCopyChunkSize, minChunkSize, maxChunkSize)
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if err != nil {
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return nil, err
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}
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multipartCopyMaxConcurrency, err := getParameterAsInt64(parameters, "multipartcopymaxconcurrency", defaultMultipartCopyMaxConcurrency, 1, math.MaxInt64)
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if err != nil {
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return nil, err
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}
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multipartCopyThresholdSize, err := getParameterAsInt64(parameters, "multipartcopythresholdsize", defaultMultipartCopyThresholdSize, 0, maxChunkSize)
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if err != nil {
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return nil, err
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}
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rootDirectory := parameters["rootdirectory"]
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if rootDirectory == nil {
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rootDirectory = ""
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}
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storageClass := s3.StorageClassStandard
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storageClassParam := parameters["storageclass"]
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if storageClassParam != nil {
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storageClassString, ok := storageClassParam.(string)
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if !ok {
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return nil, fmt.Errorf("The storageclass parameter must be one of %v, %v invalid",
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[]string{s3.StorageClassStandard, s3.StorageClassReducedRedundancy}, storageClassParam)
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}
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// All valid storage class parameters are UPPERCASE, so be a bit more flexible here
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storageClassString = strings.ToUpper(storageClassString)
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if storageClassString != noStorageClass &&
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storageClassString != s3.StorageClassStandard &&
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storageClassString != s3.StorageClassReducedRedundancy {
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return nil, fmt.Errorf("The storageclass parameter must be one of %v, %v invalid",
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[]string{noStorageClass, s3.StorageClassStandard, s3.StorageClassReducedRedundancy}, storageClassParam)
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}
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storageClass = storageClassString
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}
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userAgent := parameters["useragent"]
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if userAgent == nil {
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userAgent = ""
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}
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objectACL := s3.ObjectCannedACLPrivate
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objectACLParam := parameters["objectacl"]
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if objectACLParam != nil {
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objectACLString, ok := objectACLParam.(string)
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if !ok {
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return nil, fmt.Errorf("Invalid value for objectacl parameter: %v", objectACLParam)
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}
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if _, ok = validObjectACLs[objectACLString]; !ok {
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return nil, fmt.Errorf("Invalid value for objectacl parameter: %v", objectACLParam)
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}
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objectACL = objectACLString
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}
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sessionToken := ""
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params := DriverParameters{
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fmt.Sprint(accessKey),
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fmt.Sprint(secretKey),
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fmt.Sprint(bucket),
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region,
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fmt.Sprint(regionEndpoint),
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encryptBool,
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fmt.Sprint(keyID),
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secureBool,
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v4Bool,
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chunkSize,
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multipartCopyChunkSize,
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multipartCopyMaxConcurrency,
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multipartCopyThresholdSize,
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fmt.Sprint(rootDirectory),
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storageClass,
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fmt.Sprint(userAgent),
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objectACL,
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fmt.Sprint(sessionToken),
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}
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return New(params)
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}
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|
|
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// getParameterAsInt64 converts paramaters[name] to an int64 value (using
|
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|
// defaultt if nil), verifies it is no smaller than min, and returns it.
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func getParameterAsInt64(parameters map[string]interface{}, name string, defaultt int64, min int64, max int64) (int64, error) {
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rv := defaultt
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param := parameters[name]
|
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switch v := param.(type) {
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case string:
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vv, err := strconv.ParseInt(v, 0, 64)
|
||
|
if err != nil {
|
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return 0, fmt.Errorf("%s parameter must be an integer, %v invalid", name, param)
|
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}
|
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rv = vv
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|
case int64:
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rv = v
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case int, uint, int32, uint32, uint64:
|
||
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rv = reflect.ValueOf(v).Convert(reflect.TypeOf(rv)).Int()
|
||
|
case nil:
|
||
|
// do nothing
|
||
|
default:
|
||
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return 0, fmt.Errorf("invalid value for %s: %#v", name, param)
|
||
|
}
|
||
|
|
||
|
if rv < min || rv > max {
|
||
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return 0, fmt.Errorf("The %s %#v parameter should be a number between %d and %d (inclusive)", name, rv, min, max)
|
||
|
}
|
||
|
|
||
|
return rv, nil
|
||
|
}
|
||
|
|
||
|
// New constructs a new Driver with the given AWS credentials, region, encryption flag, and
|
||
|
// bucketName
|
||
|
func New(params DriverParameters) (*Driver, error) {
|
||
|
if !params.V4Auth &&
|
||
|
(params.RegionEndpoint == "" ||
|
||
|
strings.Contains(params.RegionEndpoint, "s3.amazonaws.com")) {
|
||
|
return nil, fmt.Errorf("On Amazon S3 this storage driver can only be used with v4 authentication")
|
||
|
}
|
||
|
|
||
|
awsConfig := aws.NewConfig()
|
||
|
creds := credentials.NewChainCredentials([]credentials.Provider{
|
||
|
&credentials.StaticProvider{
|
||
|
Value: credentials.Value{
|
||
|
AccessKeyID: params.AccessKey,
|
||
|
SecretAccessKey: params.SecretKey,
|
||
|
SessionToken: params.SessionToken,
|
||
|
},
|
||
|
},
|
||
|
&credentials.EnvProvider{},
|
||
|
&credentials.SharedCredentialsProvider{},
|
||
|
&ec2rolecreds.EC2RoleProvider{Client: ec2metadata.New(session.New())},
|
||
|
})
|
||
|
|
||
|
if params.RegionEndpoint != "" {
|
||
|
awsConfig.WithS3ForcePathStyle(true)
|
||
|
awsConfig.WithEndpoint(params.RegionEndpoint)
|
||
|
}
|
||
|
|
||
|
awsConfig.WithCredentials(creds)
|
||
|
awsConfig.WithRegion(params.Region)
|
||
|
awsConfig.WithDisableSSL(!params.Secure)
|
||
|
|
||
|
if params.UserAgent != "" {
|
||
|
awsConfig.WithHTTPClient(&http.Client{
|
||
|
Transport: transport.NewTransport(http.DefaultTransport, transport.NewHeaderRequestModifier(http.Header{http.CanonicalHeaderKey("User-Agent"): []string{params.UserAgent}})),
|
||
|
})
|
||
|
}
|
||
|
|
||
|
s3obj := s3.New(session.New(awsConfig))
|
||
|
|
||
|
// enable S3 compatible signature v2 signing instead
|
||
|
if !params.V4Auth {
|
||
|
setv2Handlers(s3obj)
|
||
|
}
|
||
|
|
||
|
// TODO Currently multipart uploads have no timestamps, so this would be unwise
|
||
|
// if you initiated a new s3driver while another one is running on the same bucket.
|
||
|
// multis, _, err := bucket.ListMulti("", "")
|
||
|
// if err != nil {
|
||
|
// return nil, err
|
||
|
// }
|
||
|
|
||
|
// for _, multi := range multis {
|
||
|
// err := multi.Abort()
|
||
|
// //TODO appropriate to do this error checking?
|
||
|
// if err != nil {
|
||
|
// return nil, err
|
||
|
// }
|
||
|
// }
|
||
|
|
||
|
d := &driver{
|
||
|
S3: s3obj,
|
||
|
Bucket: params.Bucket,
|
||
|
ChunkSize: params.ChunkSize,
|
||
|
Encrypt: params.Encrypt,
|
||
|
KeyID: params.KeyID,
|
||
|
MultipartCopyChunkSize: params.MultipartCopyChunkSize,
|
||
|
MultipartCopyMaxConcurrency: params.MultipartCopyMaxConcurrency,
|
||
|
MultipartCopyThresholdSize: params.MultipartCopyThresholdSize,
|
||
|
RootDirectory: params.RootDirectory,
|
||
|
StorageClass: params.StorageClass,
|
||
|
ObjectACL: params.ObjectACL,
|
||
|
}
|
||
|
|
||
|
return &Driver{
|
||
|
baseEmbed: baseEmbed{
|
||
|
Base: base.Base{
|
||
|
StorageDriver: d,
|
||
|
},
|
||
|
},
|
||
|
}, nil
|
||
|
}
|
||
|
|
||
|
// Implement the storagedriver.StorageDriver interface
|
||
|
|
||
|
func (d *driver) Name() string {
|
||
|
return driverName
|
||
|
}
|
||
|
|
||
|
// GetContent retrieves the content stored at "path" as a []byte.
|
||
|
func (d *driver) GetContent(ctx context.Context, path string) ([]byte, error) {
|
||
|
reader, err := d.Reader(ctx, path, 0)
|
||
|
if err != nil {
|
||
|
return nil, err
|
||
|
}
|
||
|
return ioutil.ReadAll(reader)
|
||
|
}
|
||
|
|
||
|
// PutContent stores the []byte content at a location designated by "path".
|
||
|
func (d *driver) PutContent(ctx context.Context, path string, contents []byte) error {
|
||
|
_, err := d.S3.PutObject(&s3.PutObjectInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Key: aws.String(d.s3Path(path)),
|
||
|
ContentType: d.getContentType(),
|
||
|
ACL: d.getACL(),
|
||
|
ServerSideEncryption: d.getEncryptionMode(),
|
||
|
SSEKMSKeyId: d.getSSEKMSKeyID(),
|
||
|
StorageClass: d.getStorageClass(),
|
||
|
Body: bytes.NewReader(contents),
|
||
|
})
|
||
|
return parseError(path, err)
|
||
|
}
|
||
|
|
||
|
// Reader retrieves an io.ReadCloser for the content stored at "path" with a
|
||
|
// given byte offset.
|
||
|
func (d *driver) Reader(ctx context.Context, path string, offset int64) (io.ReadCloser, error) {
|
||
|
resp, err := d.S3.GetObject(&s3.GetObjectInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Key: aws.String(d.s3Path(path)),
|
||
|
Range: aws.String("bytes=" + strconv.FormatInt(offset, 10) + "-"),
|
||
|
})
|
||
|
|
||
|
if err != nil {
|
||
|
if s3Err, ok := err.(awserr.Error); ok && s3Err.Code() == "InvalidRange" {
|
||
|
return ioutil.NopCloser(bytes.NewReader(nil)), nil
|
||
|
}
|
||
|
|
||
|
return nil, parseError(path, err)
|
||
|
}
|
||
|
return resp.Body, nil
|
||
|
}
|
||
|
|
||
|
// Writer returns a FileWriter which will store the content written to it
|
||
|
// at the location designated by "path" after the call to Commit.
|
||
|
func (d *driver) Writer(ctx context.Context, path string, append bool) (storagedriver.FileWriter, error) {
|
||
|
key := d.s3Path(path)
|
||
|
if !append {
|
||
|
// TODO (brianbland): cancel other uploads at this path
|
||
|
resp, err := d.S3.CreateMultipartUpload(&s3.CreateMultipartUploadInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Key: aws.String(key),
|
||
|
ContentType: d.getContentType(),
|
||
|
ACL: d.getACL(),
|
||
|
ServerSideEncryption: d.getEncryptionMode(),
|
||
|
SSEKMSKeyId: d.getSSEKMSKeyID(),
|
||
|
StorageClass: d.getStorageClass(),
|
||
|
})
|
||
|
if err != nil {
|
||
|
return nil, err
|
||
|
}
|
||
|
return d.newWriter(key, *resp.UploadId, nil), nil
|
||
|
}
|
||
|
resp, err := d.S3.ListMultipartUploads(&s3.ListMultipartUploadsInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Prefix: aws.String(key),
|
||
|
})
|
||
|
if err != nil {
|
||
|
return nil, parseError(path, err)
|
||
|
}
|
||
|
|
||
|
for _, multi := range resp.Uploads {
|
||
|
if key != *multi.Key {
|
||
|
continue
|
||
|
}
|
||
|
resp, err := d.S3.ListParts(&s3.ListPartsInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Key: aws.String(key),
|
||
|
UploadId: multi.UploadId,
|
||
|
})
|
||
|
if err != nil {
|
||
|
return nil, parseError(path, err)
|
||
|
}
|
||
|
var multiSize int64
|
||
|
for _, part := range resp.Parts {
|
||
|
multiSize += *part.Size
|
||
|
}
|
||
|
return d.newWriter(key, *multi.UploadId, resp.Parts), nil
|
||
|
}
|
||
|
return nil, storagedriver.PathNotFoundError{Path: path}
|
||
|
}
|
||
|
|
||
|
// Stat retrieves the FileInfo for the given path, including the current size
|
||
|
// in bytes and the creation time.
|
||
|
func (d *driver) Stat(ctx context.Context, path string) (storagedriver.FileInfo, error) {
|
||
|
resp, err := d.S3.ListObjects(&s3.ListObjectsInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Prefix: aws.String(d.s3Path(path)),
|
||
|
MaxKeys: aws.Int64(1),
|
||
|
})
|
||
|
if err != nil {
|
||
|
return nil, err
|
||
|
}
|
||
|
|
||
|
fi := storagedriver.FileInfoFields{
|
||
|
Path: path,
|
||
|
}
|
||
|
|
||
|
if len(resp.Contents) == 1 {
|
||
|
if *resp.Contents[0].Key != d.s3Path(path) {
|
||
|
fi.IsDir = true
|
||
|
} else {
|
||
|
fi.IsDir = false
|
||
|
fi.Size = *resp.Contents[0].Size
|
||
|
fi.ModTime = *resp.Contents[0].LastModified
|
||
|
}
|
||
|
} else if len(resp.CommonPrefixes) == 1 {
|
||
|
fi.IsDir = true
|
||
|
} else {
|
||
|
return nil, storagedriver.PathNotFoundError{Path: path}
|
||
|
}
|
||
|
|
||
|
return storagedriver.FileInfoInternal{FileInfoFields: fi}, nil
|
||
|
}
|
||
|
|
||
|
// List returns a list of the objects that are direct descendants of the given path.
|
||
|
func (d *driver) List(ctx context.Context, opath string) ([]string, error) {
|
||
|
path := opath
|
||
|
if path != "/" && path[len(path)-1] != '/' {
|
||
|
path = path + "/"
|
||
|
}
|
||
|
|
||
|
// This is to cover for the cases when the rootDirectory of the driver is either "" or "/".
|
||
|
// In those cases, there is no root prefix to replace and we must actually add a "/" to all
|
||
|
// results in order to keep them as valid paths as recognized by storagedriver.PathRegexp
|
||
|
prefix := ""
|
||
|
if d.s3Path("") == "" {
|
||
|
prefix = "/"
|
||
|
}
|
||
|
|
||
|
resp, err := d.S3.ListObjects(&s3.ListObjectsInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Prefix: aws.String(d.s3Path(path)),
|
||
|
Delimiter: aws.String("/"),
|
||
|
MaxKeys: aws.Int64(listMax),
|
||
|
})
|
||
|
if err != nil {
|
||
|
return nil, parseError(opath, err)
|
||
|
}
|
||
|
|
||
|
files := []string{}
|
||
|
directories := []string{}
|
||
|
|
||
|
for {
|
||
|
for _, key := range resp.Contents {
|
||
|
files = append(files, strings.Replace(*key.Key, d.s3Path(""), prefix, 1))
|
||
|
}
|
||
|
|
||
|
for _, commonPrefix := range resp.CommonPrefixes {
|
||
|
commonPrefix := *commonPrefix.Prefix
|
||
|
directories = append(directories, strings.Replace(commonPrefix[0:len(commonPrefix)-1], d.s3Path(""), prefix, 1))
|
||
|
}
|
||
|
|
||
|
if *resp.IsTruncated {
|
||
|
resp, err = d.S3.ListObjects(&s3.ListObjectsInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Prefix: aws.String(d.s3Path(path)),
|
||
|
Delimiter: aws.String("/"),
|
||
|
MaxKeys: aws.Int64(listMax),
|
||
|
Marker: resp.NextMarker,
|
||
|
})
|
||
|
if err != nil {
|
||
|
return nil, err
|
||
|
}
|
||
|
} else {
|
||
|
break
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if opath != "/" {
|
||
|
if len(files) == 0 && len(directories) == 0 {
|
||
|
// Treat empty response as missing directory, since we don't actually
|
||
|
// have directories in s3.
|
||
|
return nil, storagedriver.PathNotFoundError{Path: opath}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return append(files, directories...), nil
|
||
|
}
|
||
|
|
||
|
// Move moves an object stored at sourcePath to destPath, removing the original
|
||
|
// object.
|
||
|
func (d *driver) Move(ctx context.Context, sourcePath string, destPath string) error {
|
||
|
/* This is terrible, but aws doesn't have an actual move. */
|
||
|
if err := d.copy(ctx, sourcePath, destPath); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
return d.Delete(ctx, sourcePath)
|
||
|
}
|
||
|
|
||
|
// copy copies an object stored at sourcePath to destPath.
|
||
|
func (d *driver) copy(ctx context.Context, sourcePath string, destPath string) error {
|
||
|
// S3 can copy objects up to 5 GB in size with a single PUT Object - Copy
|
||
|
// operation. For larger objects, the multipart upload API must be used.
|
||
|
//
|
||
|
// Empirically, multipart copy is fastest with 32 MB parts and is faster
|
||
|
// than PUT Object - Copy for objects larger than 32 MB.
|
||
|
|
||
|
fileInfo, err := d.Stat(ctx, sourcePath)
|
||
|
if err != nil {
|
||
|
return parseError(sourcePath, err)
|
||
|
}
|
||
|
|
||
|
if fileInfo.Size() <= d.MultipartCopyThresholdSize {
|
||
|
_, err := d.S3.CopyObject(&s3.CopyObjectInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Key: aws.String(d.s3Path(destPath)),
|
||
|
ContentType: d.getContentType(),
|
||
|
ACL: d.getACL(),
|
||
|
ServerSideEncryption: d.getEncryptionMode(),
|
||
|
SSEKMSKeyId: d.getSSEKMSKeyID(),
|
||
|
StorageClass: d.getStorageClass(),
|
||
|
CopySource: aws.String(d.Bucket + "/" + d.s3Path(sourcePath)),
|
||
|
})
|
||
|
if err != nil {
|
||
|
return parseError(sourcePath, err)
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
createResp, err := d.S3.CreateMultipartUpload(&s3.CreateMultipartUploadInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Key: aws.String(d.s3Path(destPath)),
|
||
|
ContentType: d.getContentType(),
|
||
|
ACL: d.getACL(),
|
||
|
SSEKMSKeyId: d.getSSEKMSKeyID(),
|
||
|
ServerSideEncryption: d.getEncryptionMode(),
|
||
|
StorageClass: d.getStorageClass(),
|
||
|
})
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
numParts := (fileInfo.Size() + d.MultipartCopyChunkSize - 1) / d.MultipartCopyChunkSize
|
||
|
completedParts := make([]*s3.CompletedPart, numParts)
|
||
|
errChan := make(chan error, numParts)
|
||
|
limiter := make(chan struct{}, d.MultipartCopyMaxConcurrency)
|
||
|
|
||
|
for i := range completedParts {
|
||
|
i := int64(i)
|
||
|
go func() {
|
||
|
limiter <- struct{}{}
|
||
|
firstByte := i * d.MultipartCopyChunkSize
|
||
|
lastByte := firstByte + d.MultipartCopyChunkSize - 1
|
||
|
if lastByte >= fileInfo.Size() {
|
||
|
lastByte = fileInfo.Size() - 1
|
||
|
}
|
||
|
uploadResp, err := d.S3.UploadPartCopy(&s3.UploadPartCopyInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
CopySource: aws.String(d.Bucket + "/" + d.s3Path(sourcePath)),
|
||
|
Key: aws.String(d.s3Path(destPath)),
|
||
|
PartNumber: aws.Int64(i + 1),
|
||
|
UploadId: createResp.UploadId,
|
||
|
CopySourceRange: aws.String(fmt.Sprintf("bytes=%d-%d", firstByte, lastByte)),
|
||
|
})
|
||
|
if err == nil {
|
||
|
completedParts[i] = &s3.CompletedPart{
|
||
|
ETag: uploadResp.CopyPartResult.ETag,
|
||
|
PartNumber: aws.Int64(i + 1),
|
||
|
}
|
||
|
}
|
||
|
errChan <- err
|
||
|
<-limiter
|
||
|
}()
|
||
|
}
|
||
|
|
||
|
for range completedParts {
|
||
|
err := <-errChan
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
}
|
||
|
|
||
|
_, err = d.S3.CompleteMultipartUpload(&s3.CompleteMultipartUploadInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Key: aws.String(d.s3Path(destPath)),
|
||
|
UploadId: createResp.UploadId,
|
||
|
MultipartUpload: &s3.CompletedMultipartUpload{Parts: completedParts},
|
||
|
})
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
func min(a, b int) int {
|
||
|
if a < b {
|
||
|
return a
|
||
|
}
|
||
|
return b
|
||
|
}
|
||
|
|
||
|
// Delete recursively deletes all objects stored at "path" and its subpaths.
|
||
|
// We must be careful since S3 does not guarantee read after delete consistency
|
||
|
func (d *driver) Delete(ctx context.Context, path string) error {
|
||
|
s3Objects := make([]*s3.ObjectIdentifier, 0, listMax)
|
||
|
s3Path := d.s3Path(path)
|
||
|
listObjectsInput := &s3.ListObjectsInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Prefix: aws.String(s3Path),
|
||
|
}
|
||
|
ListLoop:
|
||
|
for {
|
||
|
// list all the objects
|
||
|
resp, err := d.S3.ListObjects(listObjectsInput)
|
||
|
|
||
|
// resp.Contents can only be empty on the first call
|
||
|
// if there were no more results to return after the first call, resp.IsTruncated would have been false
|
||
|
// and the loop would be exited without recalling ListObjects
|
||
|
if err != nil || len(resp.Contents) == 0 {
|
||
|
return storagedriver.PathNotFoundError{Path: path}
|
||
|
}
|
||
|
|
||
|
for _, key := range resp.Contents {
|
||
|
// Stop if we encounter a key that is not a subpath (so that deleting "/a" does not delete "/ab").
|
||
|
if len(*key.Key) > len(s3Path) && (*key.Key)[len(s3Path)] != '/' {
|
||
|
break ListLoop
|
||
|
}
|
||
|
s3Objects = append(s3Objects, &s3.ObjectIdentifier{
|
||
|
Key: key.Key,
|
||
|
})
|
||
|
}
|
||
|
|
||
|
// resp.Contents must have at least one element or we would have returned not found
|
||
|
listObjectsInput.Marker = resp.Contents[len(resp.Contents)-1].Key
|
||
|
|
||
|
// from the s3 api docs, IsTruncated "specifies whether (true) or not (false) all of the results were returned"
|
||
|
// if everything has been returned, break
|
||
|
if resp.IsTruncated == nil || !*resp.IsTruncated {
|
||
|
break
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// need to chunk objects into groups of 1000 per s3 restrictions
|
||
|
total := len(s3Objects)
|
||
|
for i := 0; i < total; i += 1000 {
|
||
|
_, err := d.S3.DeleteObjects(&s3.DeleteObjectsInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Delete: &s3.Delete{
|
||
|
Objects: s3Objects[i:min(i+1000, total)],
|
||
|
Quiet: aws.Bool(false),
|
||
|
},
|
||
|
})
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// URLFor returns a URL which may be used to retrieve the content stored at the given path.
|
||
|
// May return an UnsupportedMethodErr in certain StorageDriver implementations.
|
||
|
func (d *driver) URLFor(ctx context.Context, path string, options map[string]interface{}) (string, error) {
|
||
|
methodString := "GET"
|
||
|
method, ok := options["method"]
|
||
|
if ok {
|
||
|
methodString, ok = method.(string)
|
||
|
if !ok || (methodString != "GET" && methodString != "HEAD") {
|
||
|
return "", storagedriver.ErrUnsupportedMethod{}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
expiresIn := 20 * time.Minute
|
||
|
expires, ok := options["expiry"]
|
||
|
if ok {
|
||
|
et, ok := expires.(time.Time)
|
||
|
if ok {
|
||
|
expiresIn = et.Sub(time.Now())
|
||
|
}
|
||
|
}
|
||
|
|
||
|
var req *request.Request
|
||
|
|
||
|
switch methodString {
|
||
|
case "GET":
|
||
|
req, _ = d.S3.GetObjectRequest(&s3.GetObjectInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Key: aws.String(d.s3Path(path)),
|
||
|
})
|
||
|
case "HEAD":
|
||
|
req, _ = d.S3.HeadObjectRequest(&s3.HeadObjectInput{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Key: aws.String(d.s3Path(path)),
|
||
|
})
|
||
|
default:
|
||
|
panic("unreachable")
|
||
|
}
|
||
|
|
||
|
return req.Presign(expiresIn)
|
||
|
}
|
||
|
|
||
|
// Walk traverses a filesystem defined within driver, starting
|
||
|
// from the given path, calling f on each file
|
||
|
func (d *driver) Walk(ctx context.Context, from string, f storagedriver.WalkFn) error {
|
||
|
path := from
|
||
|
if !strings.HasSuffix(path, "/") {
|
||
|
path = path + "/"
|
||
|
}
|
||
|
|
||
|
prefix := ""
|
||
|
if d.s3Path("") == "" {
|
||
|
prefix = "/"
|
||
|
}
|
||
|
|
||
|
var objectCount int64
|
||
|
if err := d.doWalk(ctx, &objectCount, d.s3Path(path), prefix, f); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
// S3 doesn't have the concept of empty directories, so it'll return path not found if there are no objects
|
||
|
if objectCount == 0 {
|
||
|
return storagedriver.PathNotFoundError{Path: from}
|
||
|
}
|
||
|
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
type walkInfoContainer struct {
|
||
|
storagedriver.FileInfoFields
|
||
|
prefix *string
|
||
|
}
|
||
|
|
||
|
// Path provides the full path of the target of this file info.
|
||
|
func (wi walkInfoContainer) Path() string {
|
||
|
return wi.FileInfoFields.Path
|
||
|
}
|
||
|
|
||
|
// Size returns current length in bytes of the file. The return value can
|
||
|
// be used to write to the end of the file at path. The value is
|
||
|
// meaningless if IsDir returns true.
|
||
|
func (wi walkInfoContainer) Size() int64 {
|
||
|
return wi.FileInfoFields.Size
|
||
|
}
|
||
|
|
||
|
// ModTime returns the modification time for the file. For backends that
|
||
|
// don't have a modification time, the creation time should be returned.
|
||
|
func (wi walkInfoContainer) ModTime() time.Time {
|
||
|
return wi.FileInfoFields.ModTime
|
||
|
}
|
||
|
|
||
|
// IsDir returns true if the path is a directory.
|
||
|
func (wi walkInfoContainer) IsDir() bool {
|
||
|
return wi.FileInfoFields.IsDir
|
||
|
}
|
||
|
|
||
|
func (d *driver) doWalk(parentCtx context.Context, objectCount *int64, path, prefix string, f storagedriver.WalkFn) error {
|
||
|
var retError error
|
||
|
|
||
|
listObjectsInput := &s3.ListObjectsV2Input{
|
||
|
Bucket: aws.String(d.Bucket),
|
||
|
Prefix: aws.String(path),
|
||
|
Delimiter: aws.String("/"),
|
||
|
MaxKeys: aws.Int64(listMax),
|
||
|
}
|
||
|
|
||
|
ctx, done := dcontext.WithTrace(parentCtx)
|
||
|
defer done("s3aws.ListObjectsV2Pages(%s)", path)
|
||
|
listObjectErr := d.S3.ListObjectsV2PagesWithContext(ctx, listObjectsInput, func(objects *s3.ListObjectsV2Output, lastPage bool) bool {
|
||
|
|
||
|
*objectCount += *objects.KeyCount
|
||
|
walkInfos := make([]walkInfoContainer, 0, *objects.KeyCount)
|
||
|
|
||
|
for _, dir := range objects.CommonPrefixes {
|
||
|
commonPrefix := *dir.Prefix
|
||
|
walkInfos = append(walkInfos, walkInfoContainer{
|
||
|
prefix: dir.Prefix,
|
||
|
FileInfoFields: storagedriver.FileInfoFields{
|
||
|
IsDir: true,
|
||
|
Path: strings.Replace(commonPrefix[:len(commonPrefix)-1], d.s3Path(""), prefix, 1),
|
||
|
},
|
||
|
})
|
||
|
}
|
||
|
|
||
|
for _, file := range objects.Contents {
|
||
|
walkInfos = append(walkInfos, walkInfoContainer{
|
||
|
FileInfoFields: storagedriver.FileInfoFields{
|
||
|
IsDir: false,
|
||
|
Size: *file.Size,
|
||
|
ModTime: *file.LastModified,
|
||
|
Path: strings.Replace(*file.Key, d.s3Path(""), prefix, 1),
|
||
|
},
|
||
|
})
|
||
|
}
|
||
|
|
||
|
sort.SliceStable(walkInfos, func(i, j int) bool { return walkInfos[i].FileInfoFields.Path < walkInfos[j].FileInfoFields.Path })
|
||
|
|
||
|
for _, walkInfo := range walkInfos {
|
||
|
err := f(walkInfo)
|
||
|
|
||
|
if err == storagedriver.ErrSkipDir {
|
||
|
if walkInfo.IsDir() {
|
||
|
continue
|
||
|
} else {
|
||
|
break
|
||
|
}
|
||
|
} else if err != nil {
|
||
|
retError = err
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
if walkInfo.IsDir() {
|
||
|
if err := d.doWalk(ctx, objectCount, *walkInfo.prefix, prefix, f); err != nil {
|
||
|
retError = err
|
||
|
return false
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
return true
|
||
|
})
|
||
|
|
||
|
if retError != nil {
|
||
|
return retError
|
||
|
}
|
||
|
|
||
|
if listObjectErr != nil {
|
||
|
return listObjectErr
|
||
|
}
|
||
|
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func (d *driver) s3Path(path string) string {
|
||
|
return strings.TrimLeft(strings.TrimRight(d.RootDirectory, "/")+path, "/")
|
||
|
}
|
||
|
|
||
|
// S3BucketKey returns the s3 bucket key for the given storage driver path.
|
||
|
func (d *Driver) S3BucketKey(path string) string {
|
||
|
return d.StorageDriver.(*driver).s3Path(path)
|
||
|
}
|
||
|
|
||
|
func parseError(path string, err error) error {
|
||
|
if s3Err, ok := err.(awserr.Error); ok && s3Err.Code() == "NoSuchKey" {
|
||
|
return storagedriver.PathNotFoundError{Path: path}
|
||
|
}
|
||
|
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
func (d *driver) getEncryptionMode() *string {
|
||
|
if !d.Encrypt {
|
||
|
return nil
|
||
|
}
|
||
|
if d.KeyID == "" {
|
||
|
return aws.String("AES256")
|
||
|
}
|
||
|
return aws.String("aws:kms")
|
||
|
}
|
||
|
|
||
|
func (d *driver) getSSEKMSKeyID() *string {
|
||
|
if d.KeyID != "" {
|
||
|
return aws.String(d.KeyID)
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func (d *driver) getContentType() *string {
|
||
|
return aws.String("application/octet-stream")
|
||
|
}
|
||
|
|
||
|
func (d *driver) getACL() *string {
|
||
|
return aws.String(d.ObjectACL)
|
||
|
}
|
||
|
|
||
|
func (d *driver) getStorageClass() *string {
|
||
|
if d.StorageClass == noStorageClass {
|
||
|
return nil
|
||
|
}
|
||
|
return aws.String(d.StorageClass)
|
||
|
}
|
||
|
|
||
|
// writer attempts to upload parts to S3 in a buffered fashion where the last
|
||
|
// part is at least as large as the chunksize, so the multipart upload could be
|
||
|
// cleanly resumed in the future. This is violated if Close is called after less
|
||
|
// than a full chunk is written.
|
||
|
type writer struct {
|
||
|
driver *driver
|
||
|
key string
|
||
|
uploadID string
|
||
|
parts []*s3.Part
|
||
|
size int64
|
||
|
readyPart []byte
|
||
|
pendingPart []byte
|
||
|
closed bool
|
||
|
committed bool
|
||
|
cancelled bool
|
||
|
}
|
||
|
|
||
|
func (d *driver) newWriter(key, uploadID string, parts []*s3.Part) storagedriver.FileWriter {
|
||
|
var size int64
|
||
|
for _, part := range parts {
|
||
|
size += *part.Size
|
||
|
}
|
||
|
return &writer{
|
||
|
driver: d,
|
||
|
key: key,
|
||
|
uploadID: uploadID,
|
||
|
parts: parts,
|
||
|
size: size,
|
||
|
}
|
||
|
}
|
||
|
|
||
|
type completedParts []*s3.CompletedPart
|
||
|
|
||
|
func (a completedParts) Len() int { return len(a) }
|
||
|
func (a completedParts) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
|
||
|
func (a completedParts) Less(i, j int) bool { return *a[i].PartNumber < *a[j].PartNumber }
|
||
|
|
||
|
func (w *writer) Write(p []byte) (int, error) {
|
||
|
if w.closed {
|
||
|
return 0, fmt.Errorf("already closed")
|
||
|
} else if w.committed {
|
||
|
return 0, fmt.Errorf("already committed")
|
||
|
} else if w.cancelled {
|
||
|
return 0, fmt.Errorf("already cancelled")
|
||
|
}
|
||
|
|
||
|
// If the last written part is smaller than minChunkSize, we need to make a
|
||
|
// new multipart upload :sadface:
|
||
|
if len(w.parts) > 0 && int(*w.parts[len(w.parts)-1].Size) < minChunkSize {
|
||
|
var completedUploadedParts completedParts
|
||
|
for _, part := range w.parts {
|
||
|
completedUploadedParts = append(completedUploadedParts, &s3.CompletedPart{
|
||
|
ETag: part.ETag,
|
||
|
PartNumber: part.PartNumber,
|
||
|
})
|
||
|
}
|
||
|
|
||
|
sort.Sort(completedUploadedParts)
|
||
|
|
||
|
_, err := w.driver.S3.CompleteMultipartUpload(&s3.CompleteMultipartUploadInput{
|
||
|
Bucket: aws.String(w.driver.Bucket),
|
||
|
Key: aws.String(w.key),
|
||
|
UploadId: aws.String(w.uploadID),
|
||
|
MultipartUpload: &s3.CompletedMultipartUpload{
|
||
|
Parts: completedUploadedParts,
|
||
|
},
|
||
|
})
|
||
|
if err != nil {
|
||
|
w.driver.S3.AbortMultipartUpload(&s3.AbortMultipartUploadInput{
|
||
|
Bucket: aws.String(w.driver.Bucket),
|
||
|
Key: aws.String(w.key),
|
||
|
UploadId: aws.String(w.uploadID),
|
||
|
})
|
||
|
return 0, err
|
||
|
}
|
||
|
|
||
|
resp, err := w.driver.S3.CreateMultipartUpload(&s3.CreateMultipartUploadInput{
|
||
|
Bucket: aws.String(w.driver.Bucket),
|
||
|
Key: aws.String(w.key),
|
||
|
ContentType: w.driver.getContentType(),
|
||
|
ACL: w.driver.getACL(),
|
||
|
ServerSideEncryption: w.driver.getEncryptionMode(),
|
||
|
StorageClass: w.driver.getStorageClass(),
|
||
|
})
|
||
|
if err != nil {
|
||
|
return 0, err
|
||
|
}
|
||
|
w.uploadID = *resp.UploadId
|
||
|
|
||
|
// If the entire written file is smaller than minChunkSize, we need to make
|
||
|
// a new part from scratch :double sad face:
|
||
|
if w.size < minChunkSize {
|
||
|
resp, err := w.driver.S3.GetObject(&s3.GetObjectInput{
|
||
|
Bucket: aws.String(w.driver.Bucket),
|
||
|
Key: aws.String(w.key),
|
||
|
})
|
||
|
defer resp.Body.Close()
|
||
|
if err != nil {
|
||
|
return 0, err
|
||
|
}
|
||
|
w.parts = nil
|
||
|
w.readyPart, err = ioutil.ReadAll(resp.Body)
|
||
|
if err != nil {
|
||
|
return 0, err
|
||
|
}
|
||
|
} else {
|
||
|
// Otherwise we can use the old file as the new first part
|
||
|
copyPartResp, err := w.driver.S3.UploadPartCopy(&s3.UploadPartCopyInput{
|
||
|
Bucket: aws.String(w.driver.Bucket),
|
||
|
CopySource: aws.String(w.driver.Bucket + "/" + w.key),
|
||
|
Key: aws.String(w.key),
|
||
|
PartNumber: aws.Int64(1),
|
||
|
UploadId: resp.UploadId,
|
||
|
})
|
||
|
if err != nil {
|
||
|
return 0, err
|
||
|
}
|
||
|
w.parts = []*s3.Part{
|
||
|
{
|
||
|
ETag: copyPartResp.CopyPartResult.ETag,
|
||
|
PartNumber: aws.Int64(1),
|
||
|
Size: aws.Int64(w.size),
|
||
|
},
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
var n int
|
||
|
|
||
|
for len(p) > 0 {
|
||
|
// If no parts are ready to write, fill up the first part
|
||
|
if neededBytes := int(w.driver.ChunkSize) - len(w.readyPart); neededBytes > 0 {
|
||
|
if len(p) >= neededBytes {
|
||
|
w.readyPart = append(w.readyPart, p[:neededBytes]...)
|
||
|
n += neededBytes
|
||
|
p = p[neededBytes:]
|
||
|
} else {
|
||
|
w.readyPart = append(w.readyPart, p...)
|
||
|
n += len(p)
|
||
|
p = nil
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if neededBytes := int(w.driver.ChunkSize) - len(w.pendingPart); neededBytes > 0 {
|
||
|
if len(p) >= neededBytes {
|
||
|
w.pendingPart = append(w.pendingPart, p[:neededBytes]...)
|
||
|
n += neededBytes
|
||
|
p = p[neededBytes:]
|
||
|
err := w.flushPart()
|
||
|
if err != nil {
|
||
|
w.size += int64(n)
|
||
|
return n, err
|
||
|
}
|
||
|
} else {
|
||
|
w.pendingPart = append(w.pendingPart, p...)
|
||
|
n += len(p)
|
||
|
p = nil
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
w.size += int64(n)
|
||
|
return n, nil
|
||
|
}
|
||
|
|
||
|
func (w *writer) Size() int64 {
|
||
|
return w.size
|
||
|
}
|
||
|
|
||
|
func (w *writer) Close() error {
|
||
|
if w.closed {
|
||
|
return fmt.Errorf("already closed")
|
||
|
}
|
||
|
w.closed = true
|
||
|
return w.flushPart()
|
||
|
}
|
||
|
|
||
|
func (w *writer) Cancel() error {
|
||
|
if w.closed {
|
||
|
return fmt.Errorf("already closed")
|
||
|
} else if w.committed {
|
||
|
return fmt.Errorf("already committed")
|
||
|
}
|
||
|
w.cancelled = true
|
||
|
_, err := w.driver.S3.AbortMultipartUpload(&s3.AbortMultipartUploadInput{
|
||
|
Bucket: aws.String(w.driver.Bucket),
|
||
|
Key: aws.String(w.key),
|
||
|
UploadId: aws.String(w.uploadID),
|
||
|
})
|
||
|
return err
|
||
|
}
|
||
|
|
||
|
func (w *writer) Commit() error {
|
||
|
if w.closed {
|
||
|
return fmt.Errorf("already closed")
|
||
|
} else if w.committed {
|
||
|
return fmt.Errorf("already committed")
|
||
|
} else if w.cancelled {
|
||
|
return fmt.Errorf("already cancelled")
|
||
|
}
|
||
|
err := w.flushPart()
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
w.committed = true
|
||
|
|
||
|
var completedUploadedParts completedParts
|
||
|
for _, part := range w.parts {
|
||
|
completedUploadedParts = append(completedUploadedParts, &s3.CompletedPart{
|
||
|
ETag: part.ETag,
|
||
|
PartNumber: part.PartNumber,
|
||
|
})
|
||
|
}
|
||
|
|
||
|
sort.Sort(completedUploadedParts)
|
||
|
|
||
|
_, err = w.driver.S3.CompleteMultipartUpload(&s3.CompleteMultipartUploadInput{
|
||
|
Bucket: aws.String(w.driver.Bucket),
|
||
|
Key: aws.String(w.key),
|
||
|
UploadId: aws.String(w.uploadID),
|
||
|
MultipartUpload: &s3.CompletedMultipartUpload{
|
||
|
Parts: completedUploadedParts,
|
||
|
},
|
||
|
})
|
||
|
if err != nil {
|
||
|
w.driver.S3.AbortMultipartUpload(&s3.AbortMultipartUploadInput{
|
||
|
Bucket: aws.String(w.driver.Bucket),
|
||
|
Key: aws.String(w.key),
|
||
|
UploadId: aws.String(w.uploadID),
|
||
|
})
|
||
|
return err
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// flushPart flushes buffers to write a part to S3.
|
||
|
// Only called by Write (with both buffers full) and Close/Commit (always)
|
||
|
func (w *writer) flushPart() error {
|
||
|
if len(w.readyPart) == 0 && len(w.pendingPart) == 0 {
|
||
|
// nothing to write
|
||
|
return nil
|
||
|
}
|
||
|
if len(w.pendingPart) < int(w.driver.ChunkSize) {
|
||
|
// closing with a small pending part
|
||
|
// combine ready and pending to avoid writing a small part
|
||
|
w.readyPart = append(w.readyPart, w.pendingPart...)
|
||
|
w.pendingPart = nil
|
||
|
}
|
||
|
|
||
|
partNumber := aws.Int64(int64(len(w.parts) + 1))
|
||
|
resp, err := w.driver.S3.UploadPart(&s3.UploadPartInput{
|
||
|
Bucket: aws.String(w.driver.Bucket),
|
||
|
Key: aws.String(w.key),
|
||
|
PartNumber: partNumber,
|
||
|
UploadId: aws.String(w.uploadID),
|
||
|
Body: bytes.NewReader(w.readyPart),
|
||
|
})
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
w.parts = append(w.parts, &s3.Part{
|
||
|
ETag: resp.ETag,
|
||
|
PartNumber: partNumber,
|
||
|
Size: aws.Int64(int64(len(w.readyPart))),
|
||
|
})
|
||
|
w.readyPart = w.pendingPart
|
||
|
w.pendingPart = nil
|
||
|
return nil
|
||
|
}
|