uplink

package
v0.14.6 Latest Latest
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 Go to latest Published: Jul 2, 2019 License: AGPL-3.0 Imports: 25 Imported by: 0

Documentation

Overview

Package uplink is the main entrypoint to interacting with Storj Labs' decentralized storage network.

Projects

An (*Uplink) reference lets you open a *Project, which should have already been created via the web interface of one of the Storj Labs or Tardigrade network Satellites. You may be able to create or access your us-central-1 account here: https://us-central-1.tardigrade.io/

Opening a *Project requires a specific Satellite address (e.g. "us-central-1.tardigrade.io:7777") and an API key. The API key will grant specific access to certain operations and resources within a project. Projects allow you to manage and open Buckets.

Example: 

ul, err := uplink.NewUplink(ctx, nil)
if err != nil {
    return err
}
defer ul.Close()

p, err := ul.OpenProject(ctx, "us-central-1.tardigrade.io:7777", apiKey)
if err != nil {
    return err
}
defer p.Close()

API Keys

An API key is a "macaroon" (see https://ai.google/research/pubs/pub41892). As such, API keys can be restricted such that users of the restricted API key only have access to a subset of what the parent API key allowed. It is possible to restrict a macarron to specific operations, buckets, paths, path prefixes, or time windows.

If you need a valid API key, please visit your chosen Satellite's web interface.

Example: 

adminKey, err := uplink.ParseAPIKey("13YqeJ3Xk4KHocypZMdQZZqfC1goMvxbYSCWWEjSmew6rVvJp3GCK")
if err != nil {
    return "", err
}

readOnlyKey, err := adminKey.Restrict(macaroon.Caveat{
        DisallowWrites: true,
        DisallowLists: true,
        DisallowDeletes: true,
})
if err != nil {
    return "", err
}

// return a new restricted key that is read only
return readOnlyKey.Serialize()

Restricting an API key to a path prefix is most easily accomplished using an EncryptionAccess, so see EncryptionAccess for more.

Buckets

A bucket represents a collection of objects. You can upload, download, list, and delete objects of any size or shape. Objects within buckets are represented by keys, where keys can optionally be listed using the "/" delimiter. Objects are always end-to-end encrypted. 

b, err := p.OpenBucket(ctx, "staging", access)
if err != nil {
    return err
}
defer b.Close()

EncryptionAccess

Where an APIKey controls what resources and operations a Satellite will allow a user to access and perform, an EncryptionAccess controls what buckets, path prefixes, and objects a user has the ability to decrypt. An EncryptionAccess is a serializable collection of hierarchically-determined encryption keys, where by default the key starts at the root.

As an example, the following code creates an encryption access context (and API key) that is restricted to objects with the prefix "/logs/" inside the staging bucket. 

access := uplink.NewEncryptionAccessWithDefaultKey(defaultKey)
logServerKey, logServerAccess, err := access.Restrict(
    readOnlyKey, uplink.EncryptionRestriction{
        Bucket: "staging",
        Path: "/logs/",
    })
if err != nil {
    return "", err
}
return logServerEnc.Serialize()

The keys to decrypt data in other buckets or in other path prefixes are not contained in this new serialized encryption access context. This new encryption access context only provides the information for just what is necessary.

Objects

Objects support a couple kilobytes of arbitrary key/value metadata, an arbitrary-size primary data streams, with seeking. If you want to access only a small subrange of the data you uploaded, you can download only the range of the data you need in a fast and performant way. This allows you to stream video straight out of the network with little overhead. 

obj, err := b.OpenObject(ctx, "/logs/webserver.log")
if err != nil {
    return err
}
defer obj.Close()

reader, err := obj.DownloadRange(ctx, 0, -1)
if err != nil {
    return err
}
defer reader.Close()
Example (CreateBucket) 
package main

import (
	"context"
	"fmt"
	"io"
	"os"

	"github.com/zeebo/errs"

	"storj.io/storj/lib/uplink"
)

func CreateBucketExample(ctx context.Context,
	satelliteAddress, apiKey string,
	cfg *uplink.Config, out io.Writer) (err error) {

	errCatch := func(fn func() error) { err = errs.Combine(err, fn()) }

	// First, create an Uplink handle.
	ul, err := uplink.NewUplink(ctx, cfg)
	if err != nil {
		return err
	}
	defer errCatch(ul.Close)

	// Then, parse the API key. API keys are "macaroons" that allow you to create
	// new, restricted API keys.
	key, err := uplink.ParseAPIKey(apiKey)
	if err != nil {
		return err
	}

	// Next, open the project in question. Projects are identified by a specific
	// Satellite and API key
	p, err := ul.OpenProject(ctx, satelliteAddress, key)
	if err != nil {
		return err
	}
	defer errCatch(p.Close)

	// Last, create the bucket!
	_, err = p.CreateBucket(ctx, "testbucket", nil)
	if err != nil {
		return err
	}

	fmt.Fprintln(out, "success!")
	return nil
}

func main() {
	// The satellite address is the address of the satellite your API key is
	// valid on
	satelliteAddress := "us-central-1.tardigrade.io:7777"

	// The API key can be created in the web interface
	apiKey := "qPSUM3k0bZyOIyil2xrVWiSuc9HuB2yBP3qDrA2Gc"

	err := CreateBucketExample(context.Background(), satelliteAddress, apiKey,
		&uplink.Config{}, os.Stdout)
	if err != nil {
		panic(err)
	}
}

Output:
Example (CreateEncryptionKey) 
package main

import (
	"context"
	"fmt"
	"io"
	"io/ioutil"
	"os"
	"strings"

	"github.com/zeebo/errs"

	"storj.io/storj/lib/uplink"
)

func CreateEncryptionKeyExampleByAdmin1(ctx context.Context,
	satelliteAddress, apiKey string, cfg *uplink.Config, out io.Writer) (
	serializedAccess string, err error) {

	errCatch := func(fn func() error) { err = errs.Combine(err, fn()) }

	// First, create an Uplink handle.
	ul, err := uplink.NewUplink(ctx, cfg)
	if err != nil {
		return "", err
	}
	defer errCatch(ul.Close)

	// Parse the API key. API keys are "macaroons" that allow you to create new,
	// restricted API keys.
	key, err := uplink.ParseAPIKey(apiKey)
	if err != nil {
		return "", err
	}

	// Open the project in question. Projects are identified by a specific
	// Satellite and API key
	p, err := ul.OpenProject(ctx, satelliteAddress, key)
	if err != nil {
		return "", err
	}
	defer errCatch(p.Close)

	// Make a key
	encKey, err := p.SaltedKeyFromPassphrase(ctx, "my secret passphrase")
	if err != nil {
		return "", err
	}

	// Make an encryption context
	access := uplink.NewEncryptionAccessWithDefaultKey(*encKey)
	// serialize it
	serializedAccess, err = access.Serialize()
	if err != nil {
		return "", err
	}

	// Create a bucket
	_, err = p.CreateBucket(ctx, "prod", nil)
	if err != nil {
		return "", err
	}

	// Open bucket
	bucket, err := p.OpenBucket(ctx, "prod", access)
	if err != nil {
		return "", err
	}
	defer errCatch(bucket.Close)

	// Upload a file
	err = bucket.UploadObject(ctx, "webserver/logs/log.txt",
		strings.NewReader("hello world"), nil)
	if err != nil {
		return "", err
	}

	fmt.Fprintln(out, "success!")
	return serializedAccess, nil
}

func CreateEncryptionKeyExampleByAdmin2(ctx context.Context,
	satelliteAddress, apiKey string, serializedAccess string,
	cfg *uplink.Config, out io.Writer) (err error) {

	errCatch := func(fn func() error) { err = errs.Combine(err, fn()) }

	// First, create an Uplink handle.
	ul, err := uplink.NewUplink(ctx, cfg)
	if err != nil {
		return err
	}
	defer errCatch(ul.Close)

	// Parse the API key. API keys are "macaroons" that allow you to create new,
	// restricted API keys.
	key, err := uplink.ParseAPIKey(apiKey)
	if err != nil {
		return err
	}

	// Open the project in question. Projects are identified by a specific
	// Satellite and API key
	p, err := ul.OpenProject(ctx, satelliteAddress, key)
	if err != nil {
		return err
	}
	defer errCatch(p.Close)

	// Parse the encryption context
	access, err := uplink.ParseEncryptionAccess(serializedAccess)
	if err != nil {
		return err
	}

	// Open bucket
	bucket, err := p.OpenBucket(ctx, "prod", access)
	if err != nil {
		return err
	}
	defer errCatch(bucket.Close)

	// Open file
	obj, err := bucket.OpenObject(ctx, "webserver/logs/log.txt")
	if err != nil {
		return err
	}
	defer errCatch(obj.Close)

	// Get a reader for the entire file
	r, err := obj.DownloadRange(ctx, 0, -1)
	if err != nil {
		return err
	}
	defer errCatch(r.Close)

	// Read the file
	data, err := ioutil.ReadAll(r)
	if err != nil {
		return err
	}

	// Print it!
	fmt.Fprintln(out, string(data))
	return nil
}

func main() {
	// The satellite address is the address of the satellite your API key is
	// valid on
	satelliteAddress := "us-central-1.tardigrade.io:7777"

	// The API key can be created in the web interface
	admin1APIKey := "qPSUM3k0bZyOIyil2xrVWiSuc9HuB2yBP3qDrA2Gc"
	admin2APIKey := "udP0lzCC2rgwRZfdY70PcwWrXzrq9cl5usbiFaeyo"

	ctx := context.Background()

	// Admin1 is going to create an encryption context and share it
	access, err := CreateEncryptionKeyExampleByAdmin1(ctx, satelliteAddress,
		admin1APIKey, &uplink.Config{}, os.Stdout)
	if err != nil {
		panic(err)
	}

	// Admin2 is going to use the provided encryption context to load the
	// uploaded file
	err = CreateEncryptionKeyExampleByAdmin2(ctx, satelliteAddress,
		admin2APIKey, access, &uplink.Config{}, os.Stdout)
	if err != nil {
		panic(err)
	}
}

Output:
Example (DeleteBucket) 
package main

import (
	"context"
	"fmt"
	"io"
	"os"

	"github.com/zeebo/errs"

	"storj.io/storj/lib/uplink"
)

func DeleteBucketExample(ctx context.Context,
	satelliteAddress, apiKey string,
	cfg *uplink.Config, out io.Writer) (err error) {

	errCatch := func(fn func() error) { err = errs.Combine(err, fn()) }

	// First, create an Uplink handle.
	ul, err := uplink.NewUplink(ctx, cfg)
	if err != nil {
		return err
	}
	defer errCatch(ul.Close)

	// Then, parse the API key. API keys are "macaroons" that allow you to create
	// new, restricted API keys.
	key, err := uplink.ParseAPIKey(apiKey)
	if err != nil {
		return err
	}

	// Next, open the project in question. Projects are identified by a specific
	// Satellite and API key
	p, err := ul.OpenProject(ctx, satelliteAddress, key)
	if err != nil {
		return err
	}
	defer errCatch(p.Close)

	// Last, delete the bucket!
	err = p.DeleteBucket(ctx, "testbucket")
	if err != nil {
		return err
	}

	fmt.Fprintln(out, "success!")
	return nil
}

func main() {
	// The satellite address is the address of the satellite your API key is
	// valid on
	satelliteAddress := "us-central-1.tardigrade.io:7777"

	// The API key can be created in the web interface
	apiKey := "qPSUM3k0bZyOIyil2xrVWiSuc9HuB2yBP3qDrA2Gc"

	err := DeleteBucketExample(context.Background(), satelliteAddress, apiKey,
		&uplink.Config{}, os.Stdout)
	if err != nil {
		panic(err)
	}
}

Output:
Example (ListBuckets) 
package main

import (
	"context"
	"fmt"
	"io"
	"os"

	"github.com/zeebo/errs"

	"storj.io/storj/lib/uplink"
	"storj.io/storj/pkg/storj"
)

func ListBucketsExample(ctx context.Context,
	satelliteAddress, apiKey string,
	cfg *uplink.Config, out io.Writer) (err error) {

	errCatch := func(fn func() error) { err = errs.Combine(err, fn()) }

	// First, create an Uplink handle.
	ul, err := uplink.NewUplink(ctx, cfg)
	if err != nil {
		return err
	}
	defer errCatch(ul.Close)

	// Then, parse the API key. API keys are "macaroons" that allow you to create
	// new, restricted API keys.
	key, err := uplink.ParseAPIKey(apiKey)
	if err != nil {
		return err
	}

	// Next, open the project in question. Projects are identified by a specific
	// Satellite and API key
	p, err := ul.OpenProject(ctx, satelliteAddress, key)
	if err != nil {
		return err
	}
	defer errCatch(p.Close)

	// Last, list the buckets! Bucket listing is paginated, so you'll need to
	// use pagination.
	list := uplink.BucketListOptions{
		Direction: storj.Forward}
	for {
		result, err := p.ListBuckets(ctx, &list)
		if err != nil {
			return err
		}
		for _, bucket := range result.Items {
			fmt.Fprintf(out, "Bucket: %v\n", bucket.Name)
		}
		if !result.More {
			break
		}
		list = list.NextPage(result)
	}

	return nil
}

func main() {
	// The satellite address is the address of the satellite your API key is
	// valid on
	satelliteAddress := "us-central-1.tardigrade.io:7777"

	// The API key can be created in the web interface
	apiKey := "qPSUM3k0bZyOIyil2xrVWiSuc9HuB2yBP3qDrA2Gc"

	err := ListBucketsExample(context.Background(), satelliteAddress, apiKey,
		&uplink.Config{}, os.Stdout)
	if err != nil {
		panic(err)
	}
}

Output:
Example (RestrictAccess) 
package main

import (
	"context"
	"fmt"
	"io"
	"io/ioutil"
	"os"

	"github.com/zeebo/errs"

	"storj.io/storj/lib/uplink"
	"storj.io/storj/pkg/macaroon"
)

func RestrictAccessExampleByAdmin(ctx context.Context,
	satelliteAddress, apiKey, adminAccess string,
	cfg *uplink.Config, out io.Writer) (
	serializedUserAPIKey string, serializedAccess string, err error) {

	// Parse the API key. API keys are "macaroons" that allow you to create new,
	// restricted API keys.
	key, err := uplink.ParseAPIKey(apiKey)
	if err != nil {
		return "", "", err
	}

	// Restrict the API key to be read only and to be for just the prod and
	// staging buckets for the path webserver/logs/
	userAPIKey, err := key.Restrict(macaroon.Caveat{
		DisallowWrites:  true,
		DisallowDeletes: true,
	})
	if err != nil {
		return "", "", err
	}

	// Load the existing encryption access context
	access, err := uplink.ParseEncryptionAccess(adminAccess)
	if err != nil {
		return "", "", err
	}

	// Restrict the encryption access context to just the prod and staging
	// buckets for webserver/logs/
	userAPIKey, userAccess, err := access.Restrict(userAPIKey,
		uplink.EncryptionRestriction{
			Bucket:     "prod",
			PathPrefix: "webserver/logs",
		},
		uplink.EncryptionRestriction{
			Bucket:     "staging",
			PathPrefix: "webserver/logs",
		},
	)
	if err != nil {
		return "", "", err
	}

	// Serialize the encryption access context
	serializedUserAccess, err := userAccess.Serialize()
	if err != nil {
		return "", "", err
	}

	fmt.Fprintln(out, "success!")
	return userAPIKey.Serialize(), serializedUserAccess, nil
}

func RestrictAccessExampleByUser(ctx context.Context,
	satelliteAddress, apiKey, serializedAccess string,
	cfg *uplink.Config, out io.Writer) (err error) {

	errCatch := func(fn func() error) { err = errs.Combine(err, fn()) }

	// First, create an Uplink handle.
	ul, err := uplink.NewUplink(ctx, cfg)
	if err != nil {
		return err
	}
	defer errCatch(ul.Close)

	// Parse the API key.
	key, err := uplink.ParseAPIKey(apiKey)
	if err != nil {
		return err
	}

	// Open the project in question. Projects are identified by a specific
	// Satellite and API key
	p, err := ul.OpenProject(ctx, satelliteAddress, key)
	if err != nil {
		return err
	}
	defer errCatch(p.Close)

	// Parse the encryption access context
	access, err := uplink.ParseEncryptionAccess(serializedAccess)
	if err != nil {
		return err
	}

	// Open bucket
	bucket, err := p.OpenBucket(ctx, "prod", access)
	if err != nil {
		return err
	}
	defer errCatch(bucket.Close)

	// Open file
	obj, err := bucket.OpenObject(ctx, "webserver/logs/log.txt")
	if err != nil {
		return err
	}
	defer errCatch(obj.Close)

	// Get a reader for the entire file
	r, err := obj.DownloadRange(ctx, 0, -1)
	if err != nil {
		return err
	}
	defer errCatch(r.Close)

	// Read the file
	data, err := ioutil.ReadAll(r)
	if err != nil {
		return err
	}

	// Print it!
	fmt.Fprintln(out, string(data))
	return nil
}

func main() {
	// The satellite address is the address of the satellite your API key is
	// valid on
	satelliteAddress := "us-central-1.tardigrade.io:7777"

	// The API key can be created in the web interface
	adminAPIKey := "qPSUM3k0bZyOIyil2xrVWiSuc9HuB2yBP3qDrA2Gc"

	// The encryption access context was created using
	// NewEncryptionAccessWithDefaultKey and
	// (*Project).SaltedKeyFromPassphrase() earlier
	adminAccess := "HYGoqCEz43mCE40Hc5lQD3DtUYynx9Vo1GjOx75hQ"

	ctx := context.Background()

	// Admin1 is going to create an encryption access context and share it
	userAPIKey, access, err := RestrictAccessExampleByAdmin(ctx,
		satelliteAddress, adminAPIKey, adminAccess, &uplink.Config{}, os.Stdout)
	if err != nil {
		panic(err)
	}

	// Admin2 is going to use the provided encryption access context to load
	// the uploaded file
	err = RestrictAccessExampleByUser(ctx, satelliteAddress, userAPIKey, access,
		&uplink.Config{}, os.Stdout)
	if err != nil {
		panic(err)
	}
}

Output:

Index

Examples

Constants

This section is empty.

Variables

View Source 
var (

	// Error is the toplevel class of errors for the uplink library.
	Error = errs.Class("libuplink")
)

Functions

This section is empty.

Types

type APIKey 

type APIKey struct {
	// contains filtered or unexported fields
}

APIKey represents an access credential to certain resources

func ParseAPIKey 

func ParseAPIKey(val string) (APIKey, error)

ParseAPIKey parses an API key

func (APIKey) Restrict added in v0.14.0 

func (a APIKey) Restrict(caveat macaroon.Caveat) (APIKey, error)

Restrict generates a new APIKey with the provided Caveat attached.

func (APIKey) Serialize 

func (a APIKey) Serialize() string

Serialize serializes the API key to a string

type Bucket 

type Bucket struct {
	BucketConfig
	Name    string
	Created time.Time
	// contains filtered or unexported fields
}

Bucket represents operations you can perform on a bucket

func (*Bucket) Close 

func (b *Bucket) Close() error

Close closes the Bucket session.

func (*Bucket) DeleteObject 

func (b *Bucket) DeleteObject(ctx context.Context, path storj.Path) (err error)

DeleteObject removes an object, if authorized.

func (*Bucket) ListObjects 

func (b *Bucket) ListObjects(ctx context.Context, cfg *ListOptions) (list storj.ObjectList, err error)

ListObjects lists objects a user is authorized to see.

func (*Bucket) NewReader added in v0.12.0 

func (b *Bucket) NewReader(ctx context.Context, path storj.Path) (_ ReadSeekCloser, err error)

NewReader creates a new reader that downloads the object data.

func (*Bucket) NewWriter added in v0.12.0 

func (b *Bucket) NewWriter(ctx context.Context, path storj.Path, opts *UploadOptions) (_ io.WriteCloser, err error)

NewWriter creates a writer which uploads the object.

func (*Bucket) OpenObject 

func (b *Bucket) OpenObject(ctx context.Context, path storj.Path) (o *Object, err error)

OpenObject returns an Object handle, if authorized.

func (*Bucket) UploadObject 

func (b *Bucket) UploadObject(ctx context.Context, path storj.Path, data io.Reader, opts *UploadOptions) (err error)

UploadObject uploads a new object, if authorized.

type BucketConfig 

type BucketConfig struct {
	// PathCipher indicates which cipher suite is to be used for path
	// encryption within the new Bucket. If not set, AES-GCM encryption
	// will be used.
	PathCipher storj.CipherSuite

	// EncryptionParameters specifies the default encryption parameters to
	// be used for data encryption of new Objects in this bucket.
	EncryptionParameters storj.EncryptionParameters

	// Volatile groups config values that are likely to change semantics
	// or go away entirely between releases. Be careful when using them!
	Volatile struct {
		// RedundancyScheme defines the default Reed-Solomon and/or
		// Forward Error Correction encoding parameters to be used by
		// objects in this Bucket.
		RedundancyScheme storj.RedundancyScheme
		// SegmentsSize is the default segment size to use for new
		// objects in this Bucket.
		SegmentsSize memory.Size
	}
}

BucketConfig holds information about a bucket's configuration. This is filled in by the caller for use with CreateBucket(), or filled in by the library as Bucket.Config when a bucket is returned from OpenBucket().

type BucketListOptions 

type BucketListOptions = storj.BucketListOptions

BucketListOptions controls options to the ListBuckets() call.

type Config 

type Config struct {
	// Volatile groups config values that are likely to change semantics
	// or go away entirely between releases. Be careful when using them!
	Volatile struct {
		// TLS defines options that affect TLS negotiation for outbound
		// connections initiated by this uplink.
		TLS struct {
			// SkipPeerCAWhitelist determines whether to require all
			// remote hosts to have identity certificates signed by
			// Certificate Authorities in the default whitelist. If
			// set to true, the whitelist will be ignored.
			SkipPeerCAWhitelist bool

			// PeerCAWhitelistPath gives the path to a CA cert
			// whitelist file. It is ignored if SkipPeerCAWhitelist
			// is set. If empty, the internal default peer whitelist
			// is used.
			PeerCAWhitelistPath string
		}

		// PeerIDVersion is the identity versions remote peers to this node
		// will be supported by this node.
		PeerIDVersion string

		// MaxInlineSize determines whether the uplink will attempt to
		// store a new object in the satellite's metainfo. Objects at
		// or below this size will be marked for inline storage, and
		// objects above this size will not. (The satellite may reject
		// the inline storage and require remote storage, still.)
		MaxInlineSize memory.Size

		// MaxMemory is the default maximum amount of memory to be
		// allocated for read buffers while performing decodes of
		// objects. (This option is overrideable per Bucket if the user
		// so desires.) If set to zero, the library default (4 MiB) will
		// be used. If set to a negative value, the system will use the
		// smallest amount of memory it can.
		MaxMemory memory.Size
	}
}

Config represents configuration options for an Uplink

type EncryptionAccess 

type EncryptionAccess struct {
	// contains filtered or unexported fields
}

EncryptionAccess represents an encryption access context. It holds information about how various buckets and objects should be encrypted and decrypted.

func NewEncryptionAccess added in v0.14.5 

func NewEncryptionAccess() *EncryptionAccess

NewEncryptionAccess creates an encryption access context

func NewEncryptionAccessWithDefaultKey added in v0.14.5 

func NewEncryptionAccessWithDefaultKey(defaultKey storj.Key) *EncryptionAccess

NewEncryptionAccessWithDefaultKey creates an encryption access context with a default key set. Use (*Project).SaltedKeyFromPassphrase to generate a default key

func ParseEncryptionAccess added in v0.14.5 

func ParseEncryptionAccess(serialized string) (*EncryptionAccess, error)

ParseEncryptionAccess parses a base58 serialized encryption access into a working one.

func (*EncryptionAccess) Import added in v0.14.5 

func (s *EncryptionAccess) Import(other *EncryptionAccess) error

Import merges the other encryption access context into this one. In cases of conflicting path decryption settings (including if both accesses have a default key), the new settings are kept.

func (*EncryptionAccess) Restrict added in v0.14.5 

func (s *EncryptionAccess) Restrict(apiKey APIKey, restrictions ...EncryptionRestriction) (APIKey, *EncryptionAccess, error)

Restrict creates a new EncryptionAccess with no default key, where the key material in the new access is just enough to allow someone to access all of the given restrictions but no more.

func (*EncryptionAccess) Serialize added in v0.14.5 

func (s *EncryptionAccess) Serialize() (string, error)

Serialize turns an EncryptionAccess into base58

func (*EncryptionAccess) SetDefaultKey added in v0.14.5 

func (s *EncryptionAccess) SetDefaultKey(defaultKey storj.Key)

SetDefaultKey sets the default key for the encryption access context. Use (*Project).SaltedKeyFromPassphrase to generate a default key

func (*EncryptionAccess) Store added in v0.14.5 

func (s *EncryptionAccess) Store() *encryption.Store

Store returns the underlying encryption store for the access context.

type EncryptionRestriction added in v0.14.4 

type EncryptionRestriction struct {
	Bucket     string
	PathPrefix storj.Path
}

EncryptionRestriction represents a scenario where some set of objects may need to be encrypted/decrypted

type ListOptions 

type ListOptions = storj.ListOptions

ListOptions controls options for the ListObjects() call.

type Object 

type Object struct {
	// Meta holds the metainfo associated with the Object.
	Meta ObjectMeta
	// contains filtered or unexported fields
}

An Object is a sequence of bytes with associated metadata, stored in the Storj network (or being prepared for such storage). It belongs to a specific bucket, and has a path and a size. It is comparable to a "file" in a conventional filesystem.

func (*Object) Close 

func (o *Object) Close() error

Close closes the Object.

func (*Object) DownloadRange 

func (o *Object) DownloadRange(ctx context.Context, offset, length int64) (_ io.ReadCloser, err error)

DownloadRange returns an Object's data. A length of -1 will mean (Object.Size - offset).

type ObjectMeta 

type ObjectMeta struct {
	// Bucket gives the name of the bucket in which an Object is placed.
	Bucket string
	// Path is the path of the Object within the Bucket. Path components are
	// forward-slash-separated, like Unix file paths ("one/two/three").
	Path storj.Path
	// IsPrefix is true if this ObjectMeta does not refer to a specific
	// Object, but to some arbitrary point in the path hierarchy. This would
	// be called a "folder" or "directory" in a typical filesystem.
	IsPrefix bool

	// ContentType, if set, gives a MIME content-type for the Object, as
	// set when the object was created.
	ContentType string
	// Metadata contains the additional information about an Object that was
	// set when the object was created. See UploadOptions.Metadata for more
	// information.
	Metadata map[string]string

	// Created is the time at which the Object was created.
	Created time.Time
	// Modified is the time at which the Object was last modified.
	Modified time.Time
	// Expires is the time at which the Object expires (after which it will
	// be automatically deleted from storage nodes).
	Expires time.Time

	// Size gives the size of the Object in bytes.
	Size int64
	// Checksum gives a checksum of the contents of the Object.
	Checksum []byte

	// Volatile groups config values that are likely to change semantics
	// or go away entirely between releases. Be careful when using them!
	Volatile struct {
		// EncryptionParameters gives the encryption parameters being
		// used for the Object's data encryption.
		EncryptionParameters storj.EncryptionParameters

		// RedundancyScheme determines the Reed-Solomon and/or Forward
		// Error Correction encoding parameters to be used for this
		// Object.
		RedundancyScheme storj.RedundancyScheme

		// SegmentsSize gives the segment size being used for the
		// Object's data storage.
		SegmentsSize int64
	}
}

ObjectMeta contains metadata about a specific Object.

type Project 

type Project struct {
	// contains filtered or unexported fields
}

Project represents a specific project access session.

func (*Project) Close 

func (p *Project) Close() error

Close closes the Project. Opened buckets or objects must not be used after calling Close.

func (*Project) CreateBucket 

func (p *Project) CreateBucket(ctx context.Context, name string, cfg *BucketConfig) (bucket storj.Bucket, err error)

CreateBucket creates a new bucket if authorized.

func (*Project) DeleteBucket 

func (p *Project) DeleteBucket(ctx context.Context, bucket string) (err error)

DeleteBucket deletes a bucket if authorized. If the bucket contains any Objects at the time of deletion, they may be lost permanently.

func (*Project) GetBucketInfo 

func (p *Project) GetBucketInfo(ctx context.Context, bucket string) (b storj.Bucket, bi *BucketConfig, err error)

GetBucketInfo returns info about the requested bucket if authorized.

func (*Project) ListBuckets 

func (p *Project) ListBuckets(ctx context.Context, opts *BucketListOptions) (bl storj.BucketList, err error)

ListBuckets will list authorized buckets.

func (*Project) OpenBucket 

func (p *Project) OpenBucket(ctx context.Context, bucketName string, access *EncryptionAccess) (b *Bucket, err error)

OpenBucket returns a Bucket handle with the given EncryptionAccess information.

func (*Project) SaltedKeyFromPassphrase added in v0.14.4 

func (p *Project) SaltedKeyFromPassphrase(ctx context.Context, passphrase string) (_ *storj.Key, err error)

SaltedKeyFromPassphrase returns a key generated from the given passphrase using a stable, project-specific salt

type ReadSeekCloser added in v0.12.0 

type ReadSeekCloser interface {
	io.Reader
	io.Seeker
	io.Closer
}

ReadSeekCloser combines interfaces io.Reader, io.Seeker, io.Closer 

type Uplink struct {
	// contains filtered or unexported fields
}

Uplink represents the main entrypoint to Storj V3. An Uplink connects to a specific Satellite and caches connections and resources, allowing one to create sessions delineated by specific access controls. 

func NewUplink(ctx context.Context, cfg *Config) (_ *Uplink, err error)

NewUplink creates a new Uplink. This is the first step to create an uplink session with a user specified config or with default config, if nil config

func (*Uplink) Close 

func (u *Uplink) Close() error

Close closes the Uplink. Opened projects, buckets or objects must not be used after calling Close.

func (*Uplink) OpenProject 

func (u *Uplink) OpenProject(ctx context.Context, satelliteAddr string, apiKey APIKey) (p *Project, err error)

OpenProject returns a Project handle with the given APIKey

type UploadOptions 

type UploadOptions struct {
	// ContentType, if set, gives a MIME content-type for the Object.
	ContentType string
	// Metadata contains additional information about an Object. It can
	// hold arbitrary textual fields and can be retrieved together with the
	// Object. Field names can be at most 1024 bytes long. Field values are
	// not individually limited in size, but the total of all metadata
	// (fields and values) can not exceed 4 kiB.
	Metadata map[string]string
	// Expires is the time at which the new Object can expire (be deleted
	// automatically from storage nodes).
	Expires time.Time

	// Volatile groups config values that are likely to change semantics
	// or go away entirely between releases. Be careful when using them!
	Volatile struct {
		// EncryptionParameters determines the cipher suite to use for
		// the Object's data encryption. If not set, the Bucket's
		// defaults will be used.
		EncryptionParameters storj.EncryptionParameters

		// RedundancyScheme determines the Reed-Solomon and/or Forward
		// Error Correction encoding parameters to be used for this
		// Object.
		RedundancyScheme storj.RedundancyScheme
	}
}

UploadOptions controls options about uploading a new Object, if authorized.

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