Adds new s3 driver using aws-sdk-go instead of goamz
Keeps old s3 driver, renames to s3goamz, registers new s3 driver as both "s3" and "s3aws" Changes cloudfront middleware to use aws-sdk-go Signed-off-by: Brian Bland <brian.bland@docker.com>
This commit is contained in:
Brian Bland
parent
3cf01ffa1f
commit
d5a38e4c5f
5 changed files with 1204 additions and 22 deletions
893
docs/storage/driver/s3-goamz/s3.go
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893
docs/storage/driver/s3-goamz/s3.go
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// 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 docker/goamz client library for interfacing with
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// S3. It is intended to be deprecated in favor of the s3-aws driver
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// implementation.
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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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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"reflect"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/docker/goamz/aws"
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"github.com/docker/goamz/s3"
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"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 = "s3goamz"
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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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const defaultChunkSize = 2 * minChunkSize
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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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//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 aws.Region
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Encrypt bool
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Secure bool
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V4Auth bool
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ChunkSize int64
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RootDirectory string
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StorageClass s3.StorageClass
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UserAgent string
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}
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func init() {
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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 *s3.Bucket
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ChunkSize int64
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Encrypt bool
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RootDirectory string
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StorageClass s3.StorageClass
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pool sync.Pool // pool []byte buffers used for WriteStream
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zeros []byte // shared, zero-valued buffer used for WriteStream
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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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regionName := 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 := aws.GetRegion(fmt.Sprint(regionName))
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if region.Name == "" {
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return nil, fmt.Errorf("Invalid region provided: %v", region)
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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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v4AuthBool := false
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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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v4AuthBool = b
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case bool:
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v4AuthBool = 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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chunkSize := int64(defaultChunkSize)
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chunkSizeParam := parameters["chunksize"]
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switch v := chunkSizeParam.(type) {
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case string:
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vv, err := strconv.ParseInt(v, 0, 64)
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if err != nil {
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return nil, fmt.Errorf("chunksize parameter must be an integer, %v invalid", chunkSizeParam)
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}
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chunkSize = vv
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case int64:
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chunkSize = v
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case int, uint, int32, uint32, uint64:
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chunkSize = reflect.ValueOf(v).Convert(reflect.TypeOf(chunkSize)).Int()
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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("invalid value for chunksize: %#v", chunkSizeParam)
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}
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if chunkSize < minChunkSize {
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return nil, fmt.Errorf("The chunksize %#v parameter should be a number that is larger than or equal to %d", chunkSize, minChunkSize)
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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.StandardStorage
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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", []s3.StorageClass{s3.StandardStorage, s3.ReducedRedundancy}, 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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storageClassCasted := s3.StorageClass(strings.ToUpper(storageClassString))
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if storageClassCasted != s3.StandardStorage && storageClassCasted != s3.ReducedRedundancy {
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return nil, fmt.Errorf("The storageclass parameter must be one of %v, %v invalid", []s3.StorageClass{s3.StandardStorage, s3.ReducedRedundancy}, storageClassParam)
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}
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storageClass = storageClassCasted
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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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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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encryptBool,
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secureBool,
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v4AuthBool,
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chunkSize,
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fmt.Sprint(rootDirectory),
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storageClass,
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fmt.Sprint(userAgent),
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}
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return New(params)
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}
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// New constructs a new Driver with the given AWS credentials, region, encryption flag, and
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// bucketName
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func New(params DriverParameters) (*Driver, error) {
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auth, err := aws.GetAuth(params.AccessKey, params.SecretKey, "", time.Time{})
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if err != nil {
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return nil, fmt.Errorf("unable to resolve aws credentials, please ensure that 'accesskey' and 'secretkey' are properly set or the credentials are available in $HOME/.aws/credentials: %v", err)
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}
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if !params.Secure {
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params.Region.S3Endpoint = strings.Replace(params.Region.S3Endpoint, "https", "http", 1)
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}
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s3obj := s3.New(auth, params.Region)
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if params.UserAgent != "" {
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s3obj.Client = &http.Client{
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Transport: transport.NewTransport(http.DefaultTransport,
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transport.NewHeaderRequestModifier(http.Header{
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http.CanonicalHeaderKey("User-Agent"): []string{params.UserAgent},
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}),
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),
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}
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}
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if params.V4Auth {
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s3obj.Signature = aws.V4Signature
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} else {
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if params.Region.Name == "eu-central-1" {
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return nil, fmt.Errorf("The eu-central-1 region only works with v4 authentication")
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}
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}
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bucket := s3obj.Bucket(params.Bucket)
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// TODO Currently multipart uploads have no timestamps, so this would be unwise
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// if you initiated a new s3driver while another one is running on the same bucket.
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// multis, _, err := bucket.ListMulti("", "")
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// if err != nil {
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// return nil, err
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// }
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// for _, multi := range multis {
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// err := multi.Abort()
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// //TODO appropriate to do this error checking?
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// if err != nil {
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// return nil, err
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// }
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// }
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d := &driver{
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S3: s3obj,
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Bucket: bucket,
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ChunkSize: params.ChunkSize,
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Encrypt: params.Encrypt,
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RootDirectory: params.RootDirectory,
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StorageClass: params.StorageClass,
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zeros: make([]byte, params.ChunkSize),
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}
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d.pool.New = func() interface{} {
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return make([]byte, d.ChunkSize)
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}
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return &Driver{
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baseEmbed: baseEmbed{
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Base: base.Base{
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StorageDriver: d,
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},
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},
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}, nil
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}
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// Implement the storagedriver.StorageDriver interface
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func (d *driver) Name() string {
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return driverName
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}
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// GetContent retrieves the content stored at "path" as a []byte.
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func (d *driver) GetContent(ctx context.Context, path string) ([]byte, error) {
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content, err := d.Bucket.Get(d.s3Path(path))
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if err != nil {
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return nil, parseError(path, err)
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}
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return content, nil
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}
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// PutContent stores the []byte content at a location designated by "path".
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func (d *driver) PutContent(ctx context.Context, path string, contents []byte) error {
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return parseError(path, d.Bucket.Put(d.s3Path(path), contents, d.getContentType(), getPermissions(), d.getOptions()))
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}
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// ReadStream retrieves an io.ReadCloser for the content stored at "path" with a
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// given byte offset.
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func (d *driver) ReadStream(ctx context.Context, path string, offset int64) (io.ReadCloser, error) {
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headers := make(http.Header)
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headers.Add("Range", "bytes="+strconv.FormatInt(offset, 10)+"-")
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resp, err := d.Bucket.GetResponseWithHeaders(d.s3Path(path), headers)
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if err != nil {
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if s3Err, ok := err.(*s3.Error); ok && s3Err.Code == "InvalidRange" {
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return ioutil.NopCloser(bytes.NewReader(nil)), nil
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}
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return nil, parseError(path, err)
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}
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return resp.Body, nil
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}
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// WriteStream stores the contents of the provided io.Reader at a
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// location designated by the given path. The driver will know it has
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// received the full contents when the reader returns io.EOF. The number
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// of successfully READ bytes will be returned, even if an error is
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// returned. May be used to resume writing a stream by providing a nonzero
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// offset. Offsets past the current size will write from the position
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// beyond the end of the file.
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func (d *driver) WriteStream(ctx context.Context, path string, offset int64, reader io.Reader) (totalRead int64, err error) {
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partNumber := 1
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bytesRead := 0
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var putErrChan chan error
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parts := []s3.Part{}
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var part s3.Part
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done := make(chan struct{}) // stopgap to free up waiting goroutines
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multi, err := d.Bucket.InitMulti(d.s3Path(path), d.getContentType(), getPermissions(), d.getOptions())
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if err != nil {
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return 0, err
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}
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buf := d.getbuf()
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// We never want to leave a dangling multipart upload, our only consistent state is
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// when there is a whole object at path. This is in order to remain consistent with
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// the stat call.
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//
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// Note that if the machine dies before executing the defer, we will be left with a dangling
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// multipart upload, which will eventually be cleaned up, but we will lose all of the progress
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// made prior to the machine crashing.
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defer func() {
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if putErrChan != nil {
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if putErr := <-putErrChan; putErr != nil {
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err = putErr
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}
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}
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if len(parts) > 0 {
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if multi == nil {
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// Parts should be empty if the multi is not initialized
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panic("Unreachable")
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} else {
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if multi.Complete(parts) != nil {
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multi.Abort()
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}
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}
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}
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d.putbuf(buf) // needs to be here to pick up new buf value
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close(done) // free up any waiting goroutines
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}()
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// Fills from 0 to total from current
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fromSmallCurrent := func(total int64) error {
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current, err := d.ReadStream(ctx, path, 0)
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if err != nil {
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return err
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}
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bytesRead = 0
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for int64(bytesRead) < total {
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//The loop should very rarely enter a second iteration
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nn, err := current.Read(buf[bytesRead:total])
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bytesRead += nn
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if err != nil {
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if err != io.EOF {
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return err
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}
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break
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}
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}
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return nil
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}
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// Fills from parameter to chunkSize from reader
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fromReader := func(from int64) error {
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bytesRead = 0
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for from+int64(bytesRead) < d.ChunkSize {
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nn, err := reader.Read(buf[from+int64(bytesRead):])
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totalRead += int64(nn)
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bytesRead += nn
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if err != nil {
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if err != io.EOF {
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return err
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}
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break
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}
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}
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if putErrChan == nil {
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putErrChan = make(chan error)
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} else {
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if putErr := <-putErrChan; putErr != nil {
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putErrChan = nil
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return putErr
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}
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}
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go func(bytesRead int, from int64, buf []byte) {
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defer d.putbuf(buf) // this buffer gets dropped after this call
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// DRAGONS(stevvooe): There are few things one might want to know
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// about this section. First, the putErrChan is expecting an error
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// and a nil or just a nil to come through the channel. This is
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// covered by the silly defer below. The other aspect is the s3
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// retry backoff to deal with RequestTimeout errors. Even though
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// the underlying s3 library should handle it, it doesn't seem to
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// be part of the shouldRetry function (see AdRoll/goamz/s3).
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defer func() {
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select {
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case putErrChan <- nil: // for some reason, we do this no matter what.
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case <-done:
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return // ensure we don't leak the goroutine
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}
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}()
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if bytesRead <= 0 {
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return
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}
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var err error
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var part s3.Part
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loop:
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for retries := 0; retries < 5; retries++ {
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part, err = multi.PutPart(int(partNumber), bytes.NewReader(buf[0:int64(bytesRead)+from]))
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if err == nil {
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break // success!
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}
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// NOTE(stevvooe): This retry code tries to only retry under
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// conditions where the s3 package does not. We may add s3
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// error codes to the below if we see others bubble up in the
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// application. Right now, the most troubling is
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// RequestTimeout, which seems to only triggered when a tcp
|
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// connection to s3 slows to a crawl. If the RequestTimeout
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// ends up getting added to the s3 library and we don't see
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// other errors, this retry loop can be removed.
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switch err := err.(type) {
|
||||
case *s3.Error:
|
||||
switch err.Code {
|
||||
case "RequestTimeout":
|
||||
// allow retries on only this error.
|
||||
default:
|
||||
break loop
|
||||
}
|
||||
}
|
||||
|
||||
backoff := 100 * time.Millisecond * time.Duration(retries+1)
|
||||
logrus.Errorf("error putting part, retrying after %v: %v", err, backoff.String())
|
||||
time.Sleep(backoff)
|
||||
}
|
||||
|
||||
if err != nil {
|
||||
logrus.Errorf("error putting part, aborting: %v", err)
|
||||
select {
|
||||
case putErrChan <- err:
|
||||
case <-done:
|
||||
return // don't leak the goroutine
|
||||
}
|
||||
}
|
||||
|
||||
// parts and partNumber are safe, because this function is the
|
||||
// only one modifying them and we force it to be executed
|
||||
// serially.
|
||||
parts = append(parts, part)
|
||||
partNumber++
|
||||
}(bytesRead, from, buf)
|
||||
|
||||
buf = d.getbuf() // use a new buffer for the next call
|
||||
return nil
|
||||
}
|
||||
|
||||
if offset > 0 {
|
||||
resp, err := d.Bucket.Head(d.s3Path(path), nil)
|
||||
if err != nil {
|
||||
if s3Err, ok := err.(*s3.Error); !ok || s3Err.Code != "NoSuchKey" {
|
||||
return 0, err
|
||||
}
|
||||
}
|
||||
|
||||
currentLength := int64(0)
|
||||
if err == nil {
|
||||
currentLength = resp.ContentLength
|
||||
}
|
||||
|
||||
if currentLength >= offset {
|
||||
if offset < d.ChunkSize {
|
||||
// chunkSize > currentLength >= offset
|
||||
if err = fromSmallCurrent(offset); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
if err = fromReader(offset); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
if totalRead+offset < d.ChunkSize {
|
||||
return totalRead, nil
|
||||
}
|
||||
} else {
|
||||
// currentLength >= offset >= chunkSize
|
||||
_, part, err = multi.PutPartCopy(partNumber,
|
||||
s3.CopyOptions{CopySourceOptions: "bytes=0-" + strconv.FormatInt(offset-1, 10)},
|
||||
d.Bucket.Name+"/"+d.s3Path(path))
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
|
||||
parts = append(parts, part)
|
||||
partNumber++
|
||||
}
|
||||
} else {
|
||||
// Fills between parameters with 0s but only when to - from <= chunkSize
|
||||
fromZeroFillSmall := func(from, to int64) error {
|
||||
bytesRead = 0
|
||||
for from+int64(bytesRead) < to {
|
||||
nn, err := bytes.NewReader(d.zeros).Read(buf[from+int64(bytesRead) : to])
|
||||
bytesRead += nn
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Fills between parameters with 0s, making new parts
|
||||
fromZeroFillLarge := func(from, to int64) error {
|
||||
bytesRead64 := int64(0)
|
||||
for to-(from+bytesRead64) >= d.ChunkSize {
|
||||
part, err := multi.PutPart(int(partNumber), bytes.NewReader(d.zeros))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
bytesRead64 += d.ChunkSize
|
||||
|
||||
parts = append(parts, part)
|
||||
partNumber++
|
||||
}
|
||||
|
||||
return fromZeroFillSmall(0, (to-from)%d.ChunkSize)
|
||||
}
|
||||
|
||||
// currentLength < offset
|
||||
if currentLength < d.ChunkSize {
|
||||
if offset < d.ChunkSize {
|
||||
// chunkSize > offset > currentLength
|
||||
if err = fromSmallCurrent(currentLength); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
if err = fromZeroFillSmall(currentLength, offset); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
if err = fromReader(offset); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
if totalRead+offset < d.ChunkSize {
|
||||
return totalRead, nil
|
||||
}
|
||||
} else {
|
||||
// offset >= chunkSize > currentLength
|
||||
if err = fromSmallCurrent(currentLength); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
if err = fromZeroFillSmall(currentLength, d.ChunkSize); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
part, err = multi.PutPart(int(partNumber), bytes.NewReader(buf))
|
||||
if err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
parts = append(parts, part)
|
||||
partNumber++
|
||||
|
||||
//Zero fill from chunkSize up to offset, then some reader
|
||||
if err = fromZeroFillLarge(d.ChunkSize, offset); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
if err = fromReader(offset % d.ChunkSize); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
if totalRead+(offset%d.ChunkSize) < d.ChunkSize {
|
||||
return totalRead, nil
|
||||
}
|
||||
}
|
||||
} else {
|
||||
// offset > currentLength >= chunkSize
|
||||
_, part, err = multi.PutPartCopy(partNumber,
|
||||
s3.CopyOptions{},
|
||||
d.Bucket.Name+"/"+d.s3Path(path))
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
|
||||
parts = append(parts, part)
|
||||
partNumber++
|
||||
|
||||
//Zero fill from currentLength up to offset, then some reader
|
||||
if err = fromZeroFillLarge(currentLength, offset); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
if err = fromReader((offset - currentLength) % d.ChunkSize); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
if totalRead+((offset-currentLength)%d.ChunkSize) < d.ChunkSize {
|
||||
return totalRead, nil
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
for {
|
||||
if err = fromReader(0); err != nil {
|
||||
return totalRead, err
|
||||
}
|
||||
|
||||
if int64(bytesRead) < d.ChunkSize {
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
return totalRead, nil
|
||||
}
|
||||
|
||||
// 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) {
|
||||
listResponse, err := d.Bucket.List(d.s3Path(path), "", "", 1)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
fi := storagedriver.FileInfoFields{
|
||||
Path: path,
|
||||
}
|
||||
|
||||
if len(listResponse.Contents) == 1 {
|
||||
if listResponse.Contents[0].Key != d.s3Path(path) {
|
||||
fi.IsDir = true
|
||||
} else {
|
||||
fi.IsDir = false
|
||||
fi.Size = listResponse.Contents[0].Size
|
||||
|
||||
timestamp, err := time.Parse(time.RFC3339Nano, listResponse.Contents[0].LastModified)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
fi.ModTime = timestamp
|
||||
}
|
||||
} else if len(listResponse.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 = "/"
|
||||
}
|
||||
|
||||
listResponse, err := d.Bucket.List(d.s3Path(path), "/", "", listMax)
|
||||
if err != nil {
|
||||
return nil, parseError(opath, err)
|
||||
}
|
||||
|
||||
files := []string{}
|
||||
directories := []string{}
|
||||
|
||||
for {
|
||||
for _, key := range listResponse.Contents {
|
||||
files = append(files, strings.Replace(key.Key, d.s3Path(""), prefix, 1))
|
||||
}
|
||||
|
||||
for _, commonPrefix := range listResponse.CommonPrefixes {
|
||||
directories = append(directories, strings.Replace(commonPrefix[0:len(commonPrefix)-1], d.s3Path(""), prefix, 1))
|
||||
}
|
||||
|
||||
if listResponse.IsTruncated {
|
||||
listResponse, err = d.Bucket.List(d.s3Path(path), "/", listResponse.NextMarker, listMax)
|
||||
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. */
|
||||
_, err := d.Bucket.PutCopy(d.s3Path(destPath), getPermissions(),
|
||||
s3.CopyOptions{Options: d.getOptions(), ContentType: d.getContentType()}, d.Bucket.Name+"/"+d.s3Path(sourcePath))
|
||||
if err != nil {
|
||||
return parseError(sourcePath, err)
|
||||
}
|
||||
|
||||
return d.Delete(ctx, sourcePath)
|
||||
}
|
||||
|
||||
// Delete recursively deletes all objects stored at "path" and its subpaths.
|
||||
func (d *driver) Delete(ctx context.Context, path string) error {
|
||||
listResponse, err := d.Bucket.List(d.s3Path(path), "", "", listMax)
|
||||
if err != nil || len(listResponse.Contents) == 0 {
|
||||
return storagedriver.PathNotFoundError{Path: path}
|
||||
}
|
||||
|
||||
s3Objects := make([]s3.Object, listMax)
|
||||
|
||||
for len(listResponse.Contents) > 0 {
|
||||
for index, key := range listResponse.Contents {
|
||||
s3Objects[index].Key = key.Key
|
||||
}
|
||||
|
||||
err := d.Bucket.DelMulti(s3.Delete{Quiet: false, Objects: s3Objects[0:len(listResponse.Contents)]})
|
||||
if err != nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
listResponse, err = d.Bucket.List(d.s3Path(path), "", "", listMax)
|
||||
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{}
|
||||
}
|
||||
}
|
||||
|
||||
expiresTime := time.Now().Add(20 * time.Minute)
|
||||
expires, ok := options["expiry"]
|
||||
if ok {
|
||||
et, ok := expires.(time.Time)
|
||||
if ok {
|
||||
expiresTime = et
|
||||
}
|
||||
}
|
||||
|
||||
return d.Bucket.SignedURLWithMethod(methodString, d.s3Path(path), expiresTime, nil, nil), 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.(*s3.Error); ok && s3Err.Code == "NoSuchKey" {
|
||||
return storagedriver.PathNotFoundError{Path: path}
|
||||
}
|
||||
|
||||
return err
|
||||
}
|
||||
|
||||
func hasCode(err error, code string) bool {
|
||||
s3err, ok := err.(*aws.Error)
|
||||
return ok && s3err.Code == code
|
||||
}
|
||||
|
||||
func (d *driver) getOptions() s3.Options {
|
||||
return s3.Options{
|
||||
SSE: d.Encrypt,
|
||||
StorageClass: d.StorageClass,
|
||||
}
|
||||
}
|
||||
|
||||
func getPermissions() s3.ACL {
|
||||
return s3.Private
|
||||
}
|
||||
|
||||
func (d *driver) getContentType() string {
|
||||
return "application/octet-stream"
|
||||
}
|
||||
|
||||
// getbuf returns a buffer from the driver's pool with length d.ChunkSize.
|
||||
func (d *driver) getbuf() []byte {
|
||||
return d.pool.Get().([]byte)
|
||||
}
|
||||
|
||||
func (d *driver) putbuf(p []byte) {
|
||||
copy(p, d.zeros)
|
||||
d.pool.Put(p)
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue