Golang google cloud

Golang google cloud DEFAULT

googleapis / google-cloud-go Public

This is an auto-generated regeneration of the gapic clients by cloud.google.com/go/internal/gapicgen. Once the corresponding genproto PR is submitted, genbot will update this PR with a newer dependency to the newer version of genproto and assign reviewers to this PR. If you have been assigned to review this PR, please: - Ensure that the version of genproto in go.mod has been updated. - Ensure that CI is passing. If it's failing, it requires your manual attention. - Approve and submit this PR if you believe it's ready to ship. Corresponding genproto PR: googleapis/go-genproto#699 Changes: chore(filestore): add common_java_proto dep to java_assembly_pkg PiperOrigin-RevId: 403182344 Source-Link: googleapis/[email protected] fix(translate): add model signature for batch document translation PiperOrigin-RevId: 403140062 Source-Link: googleapis/[email protected] chore(bigquery/storage): Re-enable bigquery-storage-v1 generation, which also required updating protobuf from 3.15.3 to 3.18.1 for codegen PiperOrigin-RevId: 403132955 Source-Link: googleapis/[email protected] fix!(storage/internal): rename committed_size to persisted_size fix!: replace string key_sha256 with bytes key_sha256_bytes fix: deprecate zone_affinity field fix: add INHERITED to PublicAccessPrevention enum PiperOrigin-RevId: 402986756 Source-Link: googleapis/[email protected] fix(monitoring/apiv3): Reintroduce deprecated field/enum for backward compatibility docs: Use absolute link targets in comments The deprecated elements are still deprecated and should not be used; they're solely being reintroduced to avoid breaking changes in client libraries. PiperOrigin-RevId: 402864419 Source-Link: googleapis/[email protected]
Sours: https://github.com/googleapis/google-cloud-go

The Go Cloud Development Kit (Go CDK)

Write once, run on any cloud

Build StatusPkgGoDevCoverage

The Go Cloud Development Kit (Go CDK) allows Go application developers to seamlessly deploy cloud applications on any combination of cloud providers. It does this by providing stable, idiomatic interfaces for common uses like storage and databases. Think for cloud products.

Imagine writing this to read from blob storage (like Google Cloud Storage or S3):

ctx:=context.Background() bucket, err:=blob.OpenBucket(ctx, "s3://my-bucket") iferr!=nil { returnerr } deferbucket.Close() blobReader, err:=bucket.NewReader(ctx, "my-blob", nil) iferr!=nil { returnerr }

and being able to run that code on any cloud you want, avoiding all the ceremony of cloud-specific authorization, tracing, SDKs and all the other code required to make an application portable across cloud platforms.

The project works well with a code generator called Wire. It creates human-readable code that only imports the cloud SDKs for services you use. This allows the Go CDK to grow to support any number of cloud services, without increasing compile times or binary sizes, and avoiding any side effects from functions.

You can learn more about the project from our announcement blog post, or our talk at Next 2018:

Video: Building Go Applications for the Open Cloud (Cloud Next '18)


# First "cd" into your project directory if you have one to ensure "go get" uses# Go modules (or not) appropriately. See "go help modules" for more info. go get gocloud.dev

The Go CDK builds at the latest stable release of Go. Previous Go versions may compile but are not supported.


Documentation for the project lives primarily on https://gocloud.dev/, including tutorials.

You can also browse Go package reference on pkg.go.dev.

Project status

The APIs are still in alpha, but we think they are production-ready and are actively looking for feedback from early adopters. If you have comments or questions please open an issue.

At this time we prefer to focus on maintaining the existing APIs and drivers, and are unlikely to accept new ones into the repository. The modular nature of the Go CDK makes it simple to host new APIs and drivers for existing APIs externally, in separate repositories.

If you have a new API or driver that you believe are important and mature enough to be included, feel free to open an issue to discuss this; our default will likely be to suggest starting in a separate repository. We'll also be happy to maintain a list of such external APIs and drivers in this README.

Current features

The Go CDK provides generic APIs for:

  • Unstructured binary (blob) storage
  • Publish/Subscribe (pubsub)
  • Variables that change at runtime (runtimevar)
  • Connecting to MySQL and PostgreSQL databases (mysql, postgres)
  • Server startup and diagnostics: request logging, tracing, and health checking (server)


Thank you for your interest in contributing to the Go Cloud Development Kit!

Everyone is welcome to contribute, whether it's in the form of code, documentation, bug reports, feature requests, or anything else. We encourage you to experiment with the Go CDK and make contributions to help evolve it to meet your needs!

The GitHub repository at google/go-cloud contains some driver implementations for each portable API. We intend to include Google Cloud Platform, Amazon Web Services, and Azure implementations, as well as prominent open source services and at least one implementation suitable for use in local testing. Unfortunately, we cannot support every service directly from the project; however, we encourage contributions in separate repositories.

If you create a repository that implements the Go CDK interfaces for other services, let us know! We would be happy to link to it here and give you a heads-up before making any breaking changes.

See the contributing guide for more details.


This project is covered by the Go Code of Conduct.

Legal disclaimer

The Go CDK is open-source and released under an Apache 2.0 License. Copyright © 2018–2019 The Go Cloud Development Kit Authors.

If you are looking for the website of GoCloud Systems, which is unrelated to the Go CDK, visit https://gocloud.systems.

Sours: https://github.com/google/go-cloud
  1. Wafers costco
  2. Great progress synonym
  3. Gaming banner image

Package cloud is the root of the packages used to access Google Cloud Services. See https://godoc.org/cloud.google.com/go for a full list of sub-packages.

Client Options ¶

All clients in sub-packages are configurable via client options. These options are described here: https://godoc.org/google.golang.org/api/option.

Authentication and Authorization ¶

All the clients in sub-packages support authentication via Google Application Default Credentials (see https://cloud.google.com/docs/authentication/production), or by providing a JSON key file for a Service Account. See examples below.

Google Application Default Credentials (ADC) is the recommended way to authorize and authenticate clients. For information on how to create and obtain Application Default Credentials, see https://cloud.google.com/docs/authentication/production. Here is an example of a client using ADC to authenticate:

client, err := secretmanager.NewClient(context.Background()) if err != nil { // TODO: handle error. } _ = client // Use the client.

You can use a file with credentials to authenticate and authorize, such as a JSON key file associated with a Google service account. Service Account keys can be created and downloaded from https://console.cloud.google.com/iam-admin/serviceaccounts. This example uses the Secret Manger client, but the same steps apply to the other client libraries underneath this package. Example:

client, err := secretmanager.NewClient(context.Background(), option.WithCredentialsFile("/path/to/service-account-key.json")) if err != nil { // TODO: handle error. } _ = client // Use the client.

In some cases (for instance, you don't want to store secrets on disk), you can create credentials from in-memory JSON and use the WithCredentials option. The google package in this example is at golang.org/x/oauth2/google. This example uses the Secret Manager client, but the same steps apply to the other client libraries underneath this package. Note that scopes can be found at https://developers.google.com/identity/protocols/oauth2/scopes, and are also provided in all auto-generated libraries: for example, cloud.google.com/go/secretmanager/apiv1 provides DefaultAuthScopes. Example:

ctx := context.Background() creds, err := google.CredentialsFromJSON(ctx, []byte("JSON creds"), secretmanager.DefaultAuthScopes()...) if err != nil { // TODO: handle error. } client, err := secretmanager.NewClient(ctx, option.WithCredentials(creds)) if err != nil { // TODO: handle error. } _ = client // Use the client.

Timeouts and Cancellation ¶

By default, non-streaming methods, like Create or Get, will have a default deadline applied to the context provided at call time, unless a context deadline is already set. Streaming methods have no default deadline and will run indefinitely. To set timeouts or arrange for cancellation, use contexts. Transient errors will be retried when correctness allows.

Here is an example of how to set a timeout for an RPC, use context.WithTimeout:

ctx := context.Background() // Do not set a timeout on the context passed to NewClient: dialing happens // asynchronously, and the context is used to refresh credentials in the // background. client, err := secretmanager.NewClient(ctx) if err != nil { // TODO: handle error. } // Time out if it takes more than 10 seconds to create a dataset. tctx, cancel := context.WithTimeout(ctx, 10*time.Second) defer cancel() // Always call cancel. req := &secretmanagerpb.DeleteSecretRequest{Name: "projects/project-id/secrets/name"} if err := client.DeleteSecret(tctx, req); err != nil { // TODO: handle error. }

Here is an example of how to arrange for an RPC to be canceled, use context.WithCancel:

ctx := context.Background() // Do not cancel the context passed to NewClient: dialing happens asynchronously, // and the context is used to refresh credentials in the background. client, err := secretmanager.NewClient(ctx) if err != nil { // TODO: handle error. } cctx, cancel := context.WithCancel(ctx) defer cancel() // Always call cancel. // TODO: Make the cancel function available to whatever might want to cancel the // call--perhaps a GUI button. req := &secretmanagerpb.DeleteSecretRequest{Name: "projects/proj/secrets/name"} if err := client.DeleteSecret(cctx, req); err != nil { // TODO: handle error. }

To opt out of default deadlines, set the temporary environment variable GOOGLE_API_GO_EXPERIMENTAL_DISABLE_DEFAULT_DEADLINE to "true" prior to client creation. This affects all Google Cloud Go client libraries. This opt-out mechanism will be removed in a future release. File an issue at https://github.com/googleapis/google-cloud-go if the default deadlines cannot work for you.

Do not attempt to control the initial connection (dialing) of a service by setting a timeout on the context passed to NewClient. Dialing is non-blocking, so timeouts would be ineffective and would only interfere with credential refreshing, which uses the same context.

Connection Pooling ¶

Connection pooling differs in clients based on their transport. Cloud clients either rely on HTTP or gRPC transports to communicate with Google Cloud.

Cloud clients that use HTTP (bigquery, compute, storage, and translate) rely on the underlying HTTP transport to cache connections for later re-use. These are cached to the default http.MaxIdleConns and http.MaxIdleConnsPerHost settings in http.DefaultTransport.

For gRPC clients (all others in this repo), connection pooling is configurable. Users of cloud client libraries may specify option.WithGRPCConnectionPool(n) as a client option to NewClient calls. This configures the underlying gRPC connections to be pooled and addressed in a round robin fashion.

Using the Libraries with Docker ¶

Minimal docker images like Alpine lack CA certificates. This causes RPCs to appear to hang, because gRPC retries indefinitely. See https://github.com/googleapis/google-cloud-go/issues/928 for more information.

Debugging ¶

To see gRPC logs, set the environment variable GRPC_GO_LOG_SEVERITY_LEVEL. See https://godoc.org/google.golang.org/grpc/grpclog for more information.

For HTTP logging, set the GODEBUG environment variable to "http2debug=1" or "http2debug=2".

Inspecting errors ¶

Most of the errors returned by the generated clients can be converted into a `grpc.Status`. Converting your errors to this type can be a useful to get more information about what went wrong while debugging.

if err != { if s, ok := status.FromError(err); ok { log.Println(s.Message()) for _, d := range s.Proto().Details { log.Println(d) } } }

Client Stability ¶

Clients in this repository are considered alpha or beta unless otherwise marked as stable in the README.md. Semver is not used to communicate stability of clients.

Alpha and beta clients may change or go away without notice.

Clients marked stable will maintain compatibility with future versions for as long as we can reasonably sustain. Incompatible changes might be made in some situations, including:

- Security bugs may prompt backwards-incompatible changes.

- Situations in which components are no longer feasible to maintain without making breaking changes, including removal.

- Parts of the client surface may be outright unstable and subject to change. These parts of the surface will be labeled with the note, "It is EXPERIMENTAL and subject to change or removal without notice."

Sours: https://pkg.go.dev/cloud.google.com/go
Go - Google Cloud Platform Tutorial

Package storage provides an easy way to work with Google Cloud Storage. Google Cloud Storage stores data in named objects, which are grouped into buckets.

More information about Google Cloud Storage is available at https://cloud.google.com/storage/docs.

See https://godoc.org/cloud.google.com/go for authentication, timeouts, connection pooling and similar aspects of this package.

All of the methods of this package use exponential backoff to retry calls that fail with certain errors, as described in https://cloud.google.com/storage/docs/exponential-backoff. Retrying continues indefinitely unless the controlling context is canceled or the client is closed. See context.WithTimeout and context.WithCancel.

Creating a Client ¶

To start working with this package, create a client:

ctx := context.Background() client, err := storage.NewClient(ctx) if err != nil { // TODO: Handle error. }

The client will use your default application credentials. Clients should be reused instead of created as needed. The methods of Client are safe for concurrent use by multiple goroutines.

If you only wish to access public data, you can create an unauthenticated client with

client, err := storage.NewClient(ctx, option.WithoutAuthentication())

To use an emulator with this library, you can set the STORAGE_EMULATOR_HOST environment variable to the address at which your emulator is running. This will send requests to that address instead of to Cloud Storage. You can then create and use a client as usual:

// Set STORAGE_EMULATOR_HOST environment variable. err := os.Setenv("STORAGE_EMULATOR_HOST", "localhost:9000") if err != nil { // TODO: Handle error. } // Create client as usual. client, err := storage.NewClient(ctx) if err != nil { // TODO: Handle error. } // This request is now directed to http://localhost:9000/storage/v1/b // instead of https://storage.googleapis.com/storage/v1/b if err := client.Bucket("my-bucket").Create(ctx, projectID, nil); err != nil { // TODO: Handle error. }

Please note that there is no official emulator for Cloud Storage.

Buckets ¶

A Google Cloud Storage bucket is a collection of objects. To work with a bucket, make a bucket handle:

bkt := client.Bucket(bucketName)

A handle is a reference to a bucket. You can have a handle even if the bucket doesn't exist yet. To create a bucket in Google Cloud Storage, call Create on the handle:

if err := bkt.Create(ctx, projectID, nil); err != nil { // TODO: Handle error. }

Note that although buckets are associated with projects, bucket names are global across all projects.

Each bucket has associated metadata, represented in this package by BucketAttrs. The third argument to BucketHandle.Create allows you to set the initial BucketAttrs of a bucket. To retrieve a bucket's attributes, use Attrs:

attrs, err := bkt.Attrs(ctx) if err != nil { // TODO: Handle error. } fmt.Printf("bucket %s, created at %s, is located in %s with storage class %s\n", attrs.Name, attrs.Created, attrs.Location, attrs.StorageClass)

Objects ¶

An object holds arbitrary data as a sequence of bytes, like a file. You refer to objects using a handle, just as with buckets, but unlike buckets you don't explicitly create an object. Instead, the first time you write to an object it will be created. You can use the standard Go io.Reader and io.Writer interfaces to read and write object data:

obj := bkt.Object("data") // Write something to obj. // w implements io.Writer. w := obj.NewWriter(ctx) // Write some text to obj. This will either create the object or overwrite whatever is there already. if _, err := fmt.Fprintf(w, "This object contains text.\n"); err != nil { // TODO: Handle error. } // Close, just like writing a file. if err := w.Close(); err != nil { // TODO: Handle error. } // Read it back. r, err := obj.NewReader(ctx) if err != nil { // TODO: Handle error. } defer r.Close() if _, err := io.Copy(os.Stdout, r); err != nil { // TODO: Handle error. } // Prints "This object contains text."

Objects also have attributes, which you can fetch with Attrs:

objAttrs, err := obj.Attrs(ctx) if err != nil { // TODO: Handle error. } fmt.Printf("object %s has size %d and can be read using %s\n", objAttrs.Name, objAttrs.Size, objAttrs.MediaLink)

Listing objects ¶

Listing objects in a bucket is done with the Bucket.Objects method:

query := &storage.Query{Prefix: ""} var names []string it := bkt.Objects(ctx, query) for { attrs, err := it.Next() if err == iterator.Done { break } if err != nil { log.Fatal(err) } names = append(names, attrs.Name) }

Objects are listed lexicographically by name. To filter objects lexicographically, Query.StartOffset and/or Query.EndOffset can be used:

query := &storage.Query{ Prefix: "", StartOffset: "bar/", // Only list objects lexicographically >= "bar/" EndOffset: "foo/", // Only list objects lexicographically < "foo/" } // ... as before

If only a subset of object attributes is needed when listing, specifying this subset using Query.SetAttrSelection may speed up the listing process:

query := &storage.Query{Prefix: ""} query.SetAttrSelection([]string{"Name"}) // ... as before

ACLs ¶

Both objects and buckets have ACLs (Access Control Lists). An ACL is a list of ACLRules, each of which specifies the role of a user, group or project. ACLs are suitable for fine-grained control, but you may prefer using IAM to control access at the project level (see https://cloud.google.com/storage/docs/access-control/iam).

To list the ACLs of a bucket or object, obtain an ACLHandle and call its List method:

acls, err := obj.ACL().List(ctx) if err != nil { // TODO: Handle error. } for _, rule := range acls { fmt.Printf("%s has role %s\n", rule.Entity, rule.Role) }

You can also set and delete ACLs.

Conditions ¶

Every object has a generation and a metageneration. The generation changes whenever the content changes, and the metageneration changes whenever the metadata changes. Conditions let you check these values before an operation; the operation only executes if the conditions match. You can use conditions to prevent race conditions in read-modify-write operations.

For example, say you've read an object's metadata into objAttrs. Now you want to write to that object, but only if its contents haven't changed since you read it. Here is how to express that:

w = obj.If(storage.Conditions{GenerationMatch: objAttrs.Generation}).NewWriter(ctx) // Proceed with writing as above.

Signed URLs ¶

You can obtain a URL that lets anyone read or write an object for a limited time. You don't need to create a client to do this. See the documentation of SignedURL for details.

url, err := storage.SignedURL(bucketName, "shared-object", opts) if err != nil { // TODO: Handle error. } fmt.Println(url)

Post Policy V4 Signed Request ¶

A type of signed request that allows uploads through HTML forms directly to Cloud Storage with temporary permission. Conditions can be applied to restrict how the HTML form is used and exercised by a user.

For more information, please see https://cloud.google.com/storage/docs/xml-api/post-object as well as the documentation of GenerateSignedPostPolicyV4.

pv4, err := storage.GenerateSignedPostPolicyV4(bucketName, objectName, opts) if err != nil { // TODO: Handle error. } fmt.Printf("URL: %s\nFields; %v\n", pv4.URL, pv4.Fields)

Errors ¶

Errors returned by this client are often of the type [`googleapi.Error`](https://godoc.org/google.golang.org/api/googleapi#Error). These errors can be introspected for more information by using `errors.As` with the richer `googleapi.Error` type. For example:

var e *googleapi.Error if ok := errors.As(err, &e); ok { if e.Code == 409 { ... } }
  • Constants
  • Variables
  • func SignedURL(bucket, object string, opts *SignedURLOptions) (string, error)
  • type ACLEntity
  • type ACLHandle
  • type ACLRole
  • type ACLRule
  • type BucketAttrs
  • type BucketAttrsToUpdate
  • type BucketConditions
  • type BucketEncryption
  • type BucketHandle
    • func (b *BucketHandle) ACL() *ACLHandle
    • func (b *BucketHandle) AddNotification(ctx context.Context, n *Notification) (ret *Notification, err error)
    • func (b *BucketHandle) Attrs(ctx context.Context) (attrs *BucketAttrs, err error)
    • func (b *BucketHandle) Create(ctx context.Context, projectID string, attrs *BucketAttrs) (err error)
    • func (b *BucketHandle) DefaultObjectACL() *ACLHandle
    • func (b *BucketHandle) Delete(ctx context.Context) (err error)
    • func (b *BucketHandle) DeleteNotification(ctx context.Context, id string) (err error)
    • func (b *BucketHandle) IAM() *iam.Handle
    • func (b *BucketHandle) If(conds BucketConditions) *BucketHandle
    • func (b *BucketHandle) LockRetentionPolicy(ctx context.Context) error
    • func (b *BucketHandle) Notifications(ctx context.Context) (n map[string]*Notification, err error)
    • func (b *BucketHandle) Object(name string) *ObjectHandle
    • func (b *BucketHandle) Objects(ctx context.Context, q *Query) *ObjectIterator
    • func (b *BucketHandle) SignedURL(object string, opts *SignedURLOptions) (string, error)
    • func (b *BucketHandle) Update(ctx context.Context, uattrs BucketAttrsToUpdate) (attrs *BucketAttrs, err error)
    • func (b *BucketHandle) UserProject(projectID string) *BucketHandle
  • type BucketIterator
  • type BucketLogging
  • type BucketPolicyOnly
  • type BucketWebsite
  • type CORS
  • type Client
    • func (c *Client) Bucket(name string) *BucketHandle
    • func (c *Client) Buckets(ctx context.Context, projectID string) *BucketIterator
    • func (c *Client) Close() error
    • func (c *Client) CreateHMACKey(ctx context.Context, projectID, serviceAccountEmail string, ...) (*HMACKey, error)
    • func (c *Client) HMACKeyHandle(projectID, accessID string) *HMACKeyHandle
    • func (c *Client) ListHMACKeys(ctx context.Context, projectID string, opts ...HMACKeyOption) *HMACKeysIterator
    • func (c *Client) ServiceAccount(ctx context.Context, projectID string) (string, error)
  • type Composer
  • type Conditions
  • type Copier
  • type HMACKey
  • type HMACKeyAttrsToUpdate
  • type HMACKeyHandle
  • type HMACKeyOption
  • type HMACKeysIterator
  • type HMACState
  • type Lifecycle
  • type LifecycleAction
  • type LifecycleCondition
  • type LifecycleRule
  • type Liveness
  • type Notification
  • type ObjectAttrs
  • type ObjectAttrsToUpdate
  • type ObjectHandle
  • type ObjectIterator
  • type PolicyV4Fields
  • type PostPolicyV4
  • type PostPolicyV4Condition
  • type PostPolicyV4Options
  • type ProjectTeam
  • type Projection
  • type PublicAccessPrevention
  • type Query
  • type Reader
  • type ReaderObjectAttrs
  • type RetentionPolicy
  • type SignedURLOptions
  • type SigningScheme
  • type URLStyle
  • type UniformBucketLevelAccess
  • type Writer
View Sourceconst ( DeleteAction = "Delete" SetStorageClassAction = "SetStorageClass" )
View Sourceconst ( NoPayload = "NONE" JSONPayload = "JSON_API_V1" )

Values for Notification.PayloadFormat.

View Sourceconst ( ObjectFinalizeEvent = "OBJECT_FINALIZE" ObjectMetadataUpdateEvent = "OBJECT_METADATA_UPDATE" ObjectDeleteEvent = "OBJECT_DELETE" ObjectArchiveEvent = "OBJECT_ARCHIVE" )

Values for Notification.EventTypes.

View Sourcevar ( ErrBucketNotExist = errors.New("storage: bucket doesn't exist") ErrObjectNotExist = errors.New("storage: object doesn't exist") )

SignedURL returns a URL for the specified object. Signed URLs allow anyone access to a restricted resource for a limited time without needing a Google account or signing in. For more information about signed URLs, see https://cloud.google.com/storage/docs/accesscontrol#signed_urls_query_string_authentication

ACLEntity refers to a user or group. They are sometimes referred to as grantees.

It could be in the form of: "user-<userId>", "user-<email>", "group-<groupId>", "group-<email>", "domain-<domain>" and "project-team-<projectId>".

Or one of the predefined constants: AllUsers, AllAuthenticatedUsers.

const ( AllUsers ACLEntity = "allUsers" AllAuthenticatedUsers ACLEntity = "allAuthenticatedUsers" )

type ACLHandle¶

type ACLHandle struct { }

ACLHandle provides operations on an access control list for a Google Cloud Storage bucket or object.

func (*ACLHandle) Delete¶

Delete permanently deletes the ACL entry for the given entity.

func (*ACLHandle) List¶

List retrieves ACL entries.

func (*ACLHandle) Set¶

Set sets the role for the given entity.

ACLRole is the level of access to grant.

const ( RoleOwner ACLRole = "OWNER" RoleReader ACLRole = "READER" RoleWriter ACLRole = "WRITER" )

ACLRule represents a grant for a role to an entity (user, group or team) for a Google Cloud Storage object or bucket.

type BucketConditions struct { MetagenerationMatch int64 MetagenerationNotMatch int64 }

BucketConditions constrain bucket methods to act on specific metagenerations.

The zero value is an empty set of constraints.

type BucketEncryption struct { DefaultKMSKeyName string }

BucketEncryption is a bucket's encryption configuration.

type BucketHandle¶

type BucketHandle struct { }

BucketHandle provides operations on a Google Cloud Storage bucket. Use Client.Bucket to get a handle.

func (*BucketHandle) ACL¶

ACL returns an ACLHandle, which provides access to the bucket's access control list. This controls who can list, create or overwrite the objects in a bucket. This call does not perform any network operations.

func (*BucketHandle) AddNotification¶

AddNotification adds a notification to b. You must set n's TopicProjectID, TopicID and PayloadFormat, and must not set its ID. The other fields are all optional. The returned Notification's ID can be used to refer to it.

func (*BucketHandle) Attrs¶

Attrs returns the metadata for the bucket.

func (*BucketHandle) Create¶

Create creates the Bucket in the project. If attrs is nil the API defaults will be used.

func (*BucketHandle) DefaultObjectACL¶

DefaultObjectACL returns an ACLHandle, which provides access to the bucket's default object ACLs. These ACLs are applied to newly created objects in this bucket that do not have a defined ACL. This call does not perform any network operations.

func (*BucketHandle) Delete¶

Delete deletes the Bucket.

func (*BucketHandle) DeleteNotification¶

DeleteNotification deletes the notification with the given ID.

func (*BucketHandle) IAM¶

IAM provides access to IAM access control for the bucket.

func (*BucketHandle) If¶

If returns a new BucketHandle that applies a set of preconditions. Preconditions already set on the BucketHandle are ignored. Operations on the new handle will return an error if the preconditions are not satisfied. The only valid preconditions for buckets are MetagenerationMatch and MetagenerationNotMatch.

func (*BucketHandle) LockRetentionPolicy¶

LockRetentionPolicy locks a bucket's retention policy until a previously-configured RetentionPeriod past the EffectiveTime. Note that if RetentionPeriod is set to less than a day, the retention policy is treated as a development configuration and locking will have no effect. The BucketHandle must have a metageneration condition that matches the bucket's metageneration. See BucketHandle.If.

This feature is in private alpha release. It is not currently available to most customers. It might be changed in backwards-incompatible ways and is not subject to any SLA or deprecation policy.

func (*BucketHandle) Notifications¶

Notifications returns all the Notifications configured for this bucket, as a map indexed by notification ID.

func (*BucketHandle) Object¶

Object returns an ObjectHandle, which provides operations on the named object. This call does not perform any network operations such as fetching the object or verifying its existence. Use methods on ObjectHandle to perform network operations.

name must consist entirely of valid UTF-8-encoded runes. The full specification for valid object names can be found at:


func (*BucketHandle) Objects¶

Objects returns an iterator over the objects in the bucket that match the Query q. If q is nil, no filtering is done. Objects will be iterated over lexicographically by name.

Note: The returned iterator is not safe for concurrent operations without explicit synchronization.

func (*BucketHandle) SignedURL¶added inv1.18.0

SignedURL returns a URL for the specified object. Signed URLs allow anyone access to a restricted resource for a limited time without needing a Google account or signing in. For more information about signed URLs, see https://cloud.google.com/storage/docs/accesscontrol#signed_urls_query_string_authentication

This method only requires the Method and Expires fields in the specified SignedURLOptions opts to be non-nil. If not provided, it attempts to fill the GoogleAccessID and PrivateKey from the GOOGLE_APPLICATION_CREDENTIALS environment variable. If you are authenticating with a custom HTTP client, Service Account based auto-detection will be hindered.

If no private key is found, it attempts to use the GoogleAccessID to sign the URL. This requires the IAM Service Account Credentials API to be enabled (https://console.developers.google.com/apis/api/iamcredentials.googleapis.com/overview) and iam.serviceAccounts.signBlob permissions on the GoogleAccessID service account. If you do not want these fields set for you, you may pass them in through opts or use SignedURL(bucket, name string, opts *SignedURLOptions) instead.

func (*BucketHandle) Update¶

Update updates a bucket's attributes.

func (*BucketHandle) UserProject¶

UserProject returns a new BucketHandle that passes the project ID as the user project for all subsequent calls. Calls with a user project will be billed to that project rather than to the bucket's owning project.

A user project is required for all operations on Requester Pays buckets.

type BucketIterator struct { Prefix string }

A BucketIterator is an iterator over BucketAttrs.

Note: This iterator is not safe for concurrent operations without explicit synchronization.

Next returns the next result. Its second return value is iterator.Done if there are no more results. Once Next returns iterator.Done, all subsequent calls will return iterator.Done.

Note: This method is not safe for concurrent operations without explicit synchronization.

PageInfo supports pagination. See the google.golang.org/api/iterator package for details.

Note: This method is not safe for concurrent operations without explicit synchronization.

type BucketLogging struct { LogBucket string LogObjectPrefix string }

BucketLogging holds the bucket's logging configuration, which defines the destination bucket and optional name prefix for the current bucket's logs.

type BucketPolicyOnly struct { Enabled bool LockedTime time.Time }

BucketPolicyOnly is an alias for UniformBucketLevelAccess. Use of UniformBucketLevelAccess is preferred above BucketPolicyOnly.

CORS is the bucket's Cross-Origin Resource Sharing (CORS) configuration.

Client is a client for interacting with Google Cloud Storage.

Clients should be reused instead of created as needed. The methods of Client are safe for concurrent use by multiple goroutines.

NewClient creates a new Google Cloud Storage client. The default scope is ScopeFullControl. To use a different scope, like ScopeReadOnly, use option.WithScopes.

Clients should be reused instead of created as needed. The methods of Client are safe for concurrent use by multiple goroutines.

Bucket returns a BucketHandle, which provides operations on the named bucket. This call does not perform any network operations.

The supplied name must contain only lowercase letters, numbers, dashes, underscores, and dots. The full specification for valid bucket names can be found at:


Buckets returns an iterator over the buckets in the project. You may optionally set the iterator's Prefix field to restrict the list to buckets whose names begin with the prefix. By default, all buckets in the project are returned.

Note: The returned iterator is not safe for concurrent operations without explicit synchronization.

Close closes the Client.

Close need not be called at program exit.

CreateHMACKey invokes an RPC for Google Cloud Storage to create a new HMACKey.

This method is EXPERIMENTAL and subject to change or removal without notice.

func (*Client) HMACKeyHandle¶

HMACKeyHandle creates a handle that will be used for HMACKey operations.

This method is EXPERIMENTAL and subject to change or removal without notice.

ListHMACKeys returns an iterator for listing HMACKeys.

Note: This iterator is not safe for concurrent operations without explicit synchronization.

This method is EXPERIMENTAL and subject to change or removal without notice.

ServiceAccount fetches the email address of the given project's Google Cloud Storage service account.

A Composer composes source objects into a destination object.

For Requester Pays buckets, the user project of dst is billed.

Run performs the compose operation.

type Conditions struct { GenerationMatch int64
Sours: https://pkg.go.dev/cloud.google.com/go/storage

Cloud golang google

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21 - Setting up Google Cloud Storage

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