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https://github.com/aws/aws-sdk-go

AWS SDK for the Go programming language.
https://github.com/aws/aws-sdk-go

aws aws-sdk go

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AWS SDK for the Go programming language.

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# AWS SDK for Go



[![API Reference](https://img.shields.io/badge/api-reference-blue.svg)](https://docs.aws.amazon.com/sdk-for-go/api) [![Join the chat at https://gitter.im/aws/aws-sdk-go](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/aws/aws-sdk-go?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [![Build status](https://github.com/aws/aws-sdk-go/actions/workflows/go.yml/badge.svg?branch=main)](https://github.com/aws/aws-sdk-go/actions/workflows/go.yml) [![Apache V2 License](https://img.shields.io/badge/license-Apache%20V2-blue.svg)](https://github.com/aws/aws-sdk-go/blob/main/LICENSE.txt)



aws-sdk-go is the v1 AWS SDK for the Go programming language.



## :warning: This SDK is in maintenance mode



We previously [announced](https://aws.amazon.com/blogs/developer/announcing-end-of-support-for-aws-sdk-for-go-v1-on-july-31-2025)

the upcoming **end-of-support for AWS SDK for Go (v1)**.



Per that announcement, as of 7/31/2024, **the SDK has entered maintenance mode**.

Going forward, we will limit releases to address critical bug fixes and security

issues only. The SDK will not receive API updates for new or existing services,

or be updated to support new regions.



Maintenance mode will last for 1 year. After 7/31/2025, the SDK will enter end-of-support, and no updates at all will be made.

We recommend that you migrate to [AWS SDK for Go v2](https://aws.github.io/aws-sdk-go-v2/docs/).

For additional details as well as information on how to migrate, please refer

to the linked announcement.



Jump To:

* [Getting Started](#Getting-Started)

* [Quick Examples](#Quick-Examples)

* [Getting Help](#Getting-Help)

* [Contributing](#Contributing)

* [More Resources](#Resources)



## Getting Started



### Installing

Use `go get` to retrieve the SDK to add it to your project's Go module dependencies.



	go get github.com/aws/aws-sdk-go



To update the SDK use `go get -u` to retrieve the latest version of the SDK.



	go get -u github.com/aws/aws-sdk-go



## Quick Examples 



### Complete SDK Example



This example shows a complete working Go file which will upload a file to S3

and use the Context pattern to implement timeout logic that will cancel the

request if it takes too long. This example highlights how to use sessions,

create a service client, make a request, handle the error, and process the

response.



```go

  package main



  import (

  	"context"

  	"flag"

  	"fmt"

  	"os"

  	"time"



  	"github.com/aws/aws-sdk-go/aws"

  	"github.com/aws/aws-sdk-go/aws/awserr"

  	"github.com/aws/aws-sdk-go/aws/request"

  	"github.com/aws/aws-sdk-go/aws/session"

  	"github.com/aws/aws-sdk-go/service/s3"

  )



  // Uploads a file to S3 given a bucket and object key. Also takes a duration

  // value to terminate the update if it doesn't complete within that time.

  //

  // The AWS Region needs to be provided in the AWS shared config or on the

  // environment variable as `AWS_REGION`. Credentials also must be provided

  // Will default to shared config file, but can load from environment if provided.

  //

  // Usage:

  //   # Upload myfile.txt to myBucket/myKey. Must complete within 10 minutes or will fail

  //   go run withContext.go -b mybucket -k myKey -d 10m < myfile.txt

  func main() {

  	var bucket, key string

  	var timeout time.Duration



  	flag.StringVar(&bucket, "b", "", "Bucket name.")

  	flag.StringVar(&key, "k", "", "Object key name.")

  	flag.DurationVar(&timeout, "d", 0, "Upload timeout.")

  	flag.Parse()



  	// All clients require a Session. The Session provides the client with

 	// shared configuration such as region, endpoint, and credentials. A

 	// Session should be shared where possible to take advantage of

 	// configuration and credential caching. See the session package for

 	// more information.

  	sess := session.Must(session.NewSession())



 	// Create a new instance of the service's client with a Session.

 	// Optional aws.Config values can also be provided as variadic arguments

 	// to the New function. This option allows you to provide service

 	// specific configuration.

  	svc := s3.New(sess)



  	// Create a context with a timeout that will abort the upload if it takes

  	// more than the passed in timeout.

  	ctx := context.Background()

  	var cancelFn func()

  	if timeout > 0 {

  		ctx, cancelFn = context.WithTimeout(ctx, timeout)

  	}

  	// Ensure the context is canceled to prevent leaking.

  	// See context package for more information, https://golang.org/pkg/context/

	if cancelFn != nil {

  		defer cancelFn()

	}



  	// Uploads the object to S3. The Context will interrupt the request if the

  	// timeout expires.

  	_, err := svc.PutObjectWithContext(ctx, &s3.PutObjectInput{

  		Bucket: aws.String(bucket),

  		Key:    aws.String(key),

  		Body:   os.Stdin,

  	})

  	if err != nil {

  		if aerr, ok := err.(awserr.Error); ok && aerr.Code() == request.CanceledErrorCode {

  			// If the SDK can determine the request or retry delay was canceled

  			// by a context the CanceledErrorCode error code will be returned.

  			fmt.Fprintf(os.Stderr, "upload canceled due to timeout, %v\n", err)

  		} else {

  			fmt.Fprintf(os.Stderr, "failed to upload object, %v\n", err)

  		}

  		os.Exit(1)

  	}



  	fmt.Printf("successfully uploaded file to %s/%s\n", bucket, key)

  }

```



### Overview of SDK's Packages



The SDK is composed of two main components, SDK core, and service clients.

The SDK core packages are all available under the aws package at the root of

the SDK. Each client for a supported AWS service is available within its own

package under the service folder at the root of the SDK.



  * aws - SDK core, provides common shared types such as Config, Logger,

    and utilities to make working with API parameters easier.



      * awserr - Provides the error interface that the SDK will use for all

        errors that occur in the SDK's processing. This includes service API

        response errors as well. The Error type is made up of a code and message.

        Cast the SDK's returned error type to awserr.Error and call the Code

        method to compare returned error to specific error codes. See the package's

        documentation for additional values that can be extracted such as RequestID.



      * credentials - Provides the types and built in credentials providers

        the SDK will use to retrieve AWS credentials to make API requests with.

        Nested under this folder are also additional credentials providers such as

        stscreds for assuming IAM roles, and ec2rolecreds for EC2 Instance roles.



      * endpoints - Provides the AWS Regions and Endpoints metadata for the SDK.

        Use this to lookup AWS service endpoint information such as which services

        are in a region, and what regions a service is in. Constants are also provided

        for all region identifiers, e.g UsWest2RegionID for "us-west-2".



      * session - Provides initial default configuration, and load

        configuration from external sources such as environment and shared

        credentials file.



      * request - Provides the API request sending, and retry logic for the SDK.

        This package also includes utilities for defining your own request

        retryer, and configuring how the SDK processes the request.



  * service - Clients for AWS services. All services supported by the SDK are

    available under this folder.



### How to Use the SDK's AWS Service Clients



The SDK includes the Go types and utilities you can use to make requests to

AWS service APIs. Within the service folder at the root of the SDK you'll find

a package for each AWS service the SDK supports. All service clients follow common pattern of creation and usage.



When creating a client for an AWS service you'll first need to have a Session

value constructed. The Session provides shared configuration that can be shared

between your service clients. When service clients are created you can pass

in additional configuration via the aws.Config type to override configuration

provided by in the Session to create service client instances with custom

configuration.



Once the service's client is created you can use it to make API requests the

AWS service. These clients are safe to use concurrently.



### Configuring the SDK



In the AWS SDK for Go, you can configure settings for service clients, such

as the log level and maximum number of retries. Most settings are optional;

however, for each service client, you must specify a region and your credentials.

The SDK uses these values to send requests to the correct AWS region and sign

requests with the correct credentials. You can specify these values as part

of a session or as environment variables.



See the SDK's [configuration guide][config_guide] for more information.



See the [session][session_pkg] package documentation for more information on how to use Session

with the SDK.



See the [Config][config_typ] type in the [aws][aws_pkg] package for more information on configuration

options.



[config_guide]: https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/configuring-sdk.html

[session_pkg]: https://docs.aws.amazon.com/sdk-for-go/api/aws/session/

[config_typ]: https://docs.aws.amazon.com/sdk-for-go/api/aws/#Config

[aws_pkg]: https://docs.aws.amazon.com/sdk-for-go/api/aws/



### Configuring Credentials



When using the SDK you'll generally need your AWS credentials to authenticate

with AWS services. The SDK supports multiple methods of supporting these

credentials. By default the SDK will source credentials automatically from

its default credential chain. See the session package for more information

on this chain, and how to configure it. The common items in the credential

chain are the following:



  * Environment Credentials - Set of environment variables that are useful

    when sub processes are created for specific roles.



  * Shared Credentials file (~/.aws/credentials) - This file stores your

    credentials based on a profile name and is useful for local development.



  * EC2 Instance Role Credentials - Use EC2 Instance Role to assign credentials

    to application running on an EC2 instance. This removes the need to manage

    credential files in production.



Credentials can be configured in code as well by setting the Config's Credentials

value to a custom provider or using one of the providers included with the

SDK to bypass the default credential chain and use a custom one. This is

helpful when you want to instruct the SDK to only use a specific set of

credentials or providers.



This example creates a credential provider for assuming an IAM role, "myRoleARN"

and configures the S3 service client to use that role for API requests.



```go

  // Initial credentials loaded from SDK's default credential chain. Such as

  // the environment, shared credentials (~/.aws/credentials), or EC2 Instance

  // Role. These credentials will be used to to make the STS Assume Role API.

  sess := session.Must(session.NewSession())



  // Create the credentials from AssumeRoleProvider to assume the role

  // referenced by the "myRoleARN" ARN.

  creds := stscreds.NewCredentials(sess, "myRoleArn")



  // Create service client value configured for credentials

  // from assumed role.

  svc := s3.New(sess, &aws.Config{Credentials: creds})

```



See the [credentials][credentials_pkg] package documentation for more information on credential

providers included with the SDK, and how to customize the SDK's usage of

credentials.



The SDK has support for the shared configuration file (~/.aws/config). This

support can be enabled by setting the environment variable, "AWS_SDK_LOAD_CONFIG=1",

or enabling the feature in code when creating a Session via the

Option's SharedConfigState parameter.



```go

  sess := session.Must(session.NewSessionWithOptions(session.Options{

      SharedConfigState: session.SharedConfigEnable,

  }))

```



[credentials_pkg]: https://docs.aws.amazon.com/sdk-for-go/api/aws/credentials



### Configuring AWS Region



In addition to the credentials you'll need to specify the region the SDK

will use to make AWS API requests to. In the SDK you can specify the region

either with an environment variable, or directly in code when a Session or

service client is created. The last value specified in code wins if the region

is specified multiple ways.



To set the region via the environment variable set the "AWS_REGION" to the

region you want to the SDK to use. Using this method to set the region will

allow you to run your application in multiple regions without needing additional

code in the application to select the region.



    AWS_REGION=us-west-2



The endpoints package includes constants for all regions the SDK knows. The

values are all suffixed with RegionID. These values are helpful, because they

reduce the need to type the region string manually.



To set the region on a Session use the aws package's Config struct parameter

Region to the AWS region you want the service clients created from the session to

use. This is helpful when you want to create multiple service clients, and

all of the clients make API requests to the same region.



```go

  sess := session.Must(session.NewSession(&aws.Config{

      Region: aws.String(endpoints.UsWest2RegionID),

  }))

```



See the [endpoints][endpoints_pkg] package for the AWS Regions and Endpoints metadata.



In addition to setting the region when creating a Session you can also set

the region on a per service client bases. This overrides the region of a

Session. This is helpful when you want to create service clients in specific

regions different from the Session's region.



```go

  svc := s3.New(sess, &aws.Config{

      Region: aws.String(endpoints.UsWest2RegionID),

  })

```



See the [Config][config_typ] type in the [aws][aws_pkg] package for more information and additional

options such as setting the Endpoint, and other service client configuration options.



[endpoints_pkg]: https://docs.aws.amazon.com/sdk-for-go/api/aws/endpoints/



### Making API Requests



Once the client is created you can make an API request to the service.

Each API method takes a input parameter, and returns the service response

and an error. The SDK provides methods for making the API call in multiple ways.



In this list we'll use the S3 ListObjects API as an example for the different

ways of making API requests.



  * ListObjects - Base API operation that will make the API request to the service.



  * ListObjectsRequest - API methods suffixed with Request will construct the

    API request, but not send it. This is also helpful when you want to get a

    presigned URL for a request, and share the presigned URL instead of your

    application making the request directly.



  * ListObjectsPages - Same as the base API operation, but uses a callback to

    automatically handle pagination of the API's response.



  * ListObjectsWithContext - Same as base API operation, but adds support for

    the Context pattern. This is helpful for controlling the canceling of in

    flight requests. See the Go standard library context package for more

    information. This method also takes request package's Option functional

    options as the variadic argument for modifying how the request will be

    made, or extracting information from the raw HTTP response.



  * ListObjectsPagesWithContext - same as ListObjectsPages, but adds support for

    the Context pattern. Similar to ListObjectsWithContext this method also

    takes the request package's Option function option types as the variadic

    argument.



In addition to the API operations the SDK also includes several higher level

methods that abstract checking for and waiting for an AWS resource to be in

a desired state. In this list we'll use WaitUntilBucketExists to demonstrate

the different forms of waiters.



  * WaitUntilBucketExists. - Method to make API request to query an AWS service for

    a resource's state. Will return successfully when that state is accomplished.



  * WaitUntilBucketExistsWithContext - Same as WaitUntilBucketExists, but adds

    support for the Context pattern. In addition these methods take request

    package's WaiterOptions to configure the waiter, and how underlying request

    will be made by the SDK.



The API method will document which error codes the service might return for

the operation. These errors will also be available as const strings prefixed

with "ErrCode" in the service client's package. If there are no errors listed

in the API's SDK documentation you'll need to consult the AWS service's API

documentation for the errors that could be returned.



```go

  ctx := context.Background()



  result, err := svc.GetObjectWithContext(ctx, &s3.GetObjectInput{

      Bucket: aws.String("my-bucket"),

      Key: aws.String("my-key"),

  })

  if err != nil {

      // Cast err to awserr.Error to handle specific error codes.

      aerr, ok := err.(awserr.Error)

      if ok && aerr.Code() == s3.ErrCodeNoSuchKey {

          // Specific error code handling

      }

      return err

  }



  // Make sure to close the body when done with it for S3 GetObject APIs or

  // will leak connections.

  defer result.Body.Close()



  fmt.Println("Object Size:", aws.Int64Value(result.ContentLength))

```



### API Request Pagination and Resource Waiters



Pagination helper methods are suffixed with "Pages", and provide the

functionality needed to round trip API page requests. Pagination methods

take a callback function that will be called for each page of the API's response.



```go

   objects := []string{}

   err := svc.ListObjectsPagesWithContext(ctx, &s3.ListObjectsInput{

       Bucket: aws.String(myBucket),

   }, func(p *s3.ListObjectsOutput, lastPage bool) bool {

       for _, o := range p.Contents {

           objects = append(objects, aws.StringValue(o.Key))

       }

       return true // continue paging

   })

   if err != nil {

       panic(fmt.Sprintf("failed to list objects for bucket, %s, %v", myBucket, err))

   }



   fmt.Println("Objects in bucket:", objects)

```



Waiter helper methods provide the functionality to wait for an AWS resource

state. These methods abstract the logic needed to check the state of an

AWS resource, and wait until that resource is in a desired state. The waiter

will block until the resource is in the state that is desired, an error occurs,

or the waiter times out. If a resource times out the error code returned will

be request.WaiterResourceNotReadyErrorCode.



```go

  err := svc.WaitUntilBucketExistsWithContext(ctx, &s3.HeadBucketInput{

      Bucket: aws.String(myBucket),

  })

  if err != nil {

      aerr, ok := err.(awserr.Error)

      if ok && aerr.Code() == request.WaiterResourceNotReadyErrorCode {

          fmt.Fprintf(os.Stderr, "timed out while waiting for bucket to exist")

      }

      panic(fmt.Errorf("failed to wait for bucket to exist, %v", err))

  }

  fmt.Println("Bucket", myBucket, "exists")

```    



## Getting Help



Please use these community resources for getting help. We use the GitHub issues

for tracking bugs and feature requests.



* Ask a question on [StackOverflow](http://stackoverflow.com/) and tag it with the [`aws-sdk-go`](http://stackoverflow.com/questions/tagged/aws-sdk-go) tag.

* Come join the AWS SDK for Go community chat on [gitter](https://gitter.im/aws/aws-sdk-go).

* Open a support ticket with [AWS Support](http://docs.aws.amazon.com/awssupport/latest/user/getting-started.html).

* If you think you may have found a bug, please open an [issue](https://github.com/aws/aws-sdk-go/issues/new/choose).



This SDK implements AWS service APIs. For general issues regarding the AWS services and their limitations, you may also take a look at the [Amazon Web Services Discussion Forums](https://forums.aws.amazon.com/).



### Opening Issues



If you encounter a bug with the AWS SDK for Go we would like to hear about it.

Search the [existing issues](https://github.com/aws/aws-sdk-go/issues) and see

if others are also experiencing the issue before opening a new issue. Please

include the version of AWS SDK for Go, Go language, and OS you’re using. Please

also include reproduction case when appropriate.



The GitHub issues are intended for bug reports and feature requests. For help

and questions with using AWS SDK for Go please make use of the resources listed

in the [Getting Help](https://github.com/aws/aws-sdk-go#getting-help) section.

Keeping the list of open issues lean will help us respond in a timely manner.



## Contributing



We work hard to provide a high-quality and useful SDK for our AWS services, and we greatly value feedback and contributions from our community. Please review our [contributing guidelines](./CONTRIBUTING.md) before submitting any [issues] or [pull requests][pr] to ensure we have all the necessary information to effectively respond to your bug report or contribution.



## Maintenance and support for SDK major versions



For information about maintenance and support for SDK major versions and our underlying dependencies, see the following in the AWS SDKs and Tools Shared Configuration and Credentials Reference Guide:



* [AWS SDKs and Tools Maintenance Policy](https://docs.aws.amazon.com/credref/latest/refdocs/maint-policy.html)

* [AWS SDKs and Tools Version Support Matrix](https://docs.aws.amazon.com/credref/latest/refdocs/version-support-matrix.html)



### Go version support policy



The v2 SDK follows the upstream [release policy](https://go.dev/doc/devel/release#policy)

with an additional six months of support for the most recently deprecated

language version.



**AWS reserves the right to drop support for unsupported Go versions earlier to

address critical security issues.**



## Resources



[Developer guide](https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/welcome.html) - This document

is a general introduction on how to configure and make requests with the SDK.

If this is your first time using the SDK, this documentation and the API

documentation will help you get started. This document focuses on the syntax

and behavior of the SDK. The [Service Developer Guide](https://aws.amazon.com/documentation/) 

will help you get started using specific AWS services.



[SDK API Reference Documentation](https://docs.aws.amazon.com/sdk-for-go/api/) - Use this

document to look up all API operation input and output parameters for AWS

services supported by the SDK. The API reference also includes documentation of

the SDK, and examples how to using the SDK, service client API operations, and

API operation require parameters.



[Service Documentation](https://aws.amazon.com/documentation/) - Use this

documentation to learn how to interface with AWS services. These guides are

great for getting started with a service, or when looking for more 

information about a service. While this document is not required for coding, 

services may supply helpful samples to look out for.



[SDK Examples](https://github.com/aws/aws-sdk-go/tree/main/example) -

Included in the SDK's repo are several hand crafted examples using the SDK

features and AWS services.



[Forum](https://forums.aws.amazon.com/forum.jspa?forumID=293) - Ask questions, get help, and give feedback



[Issues][issues] - Report issues, submit pull requests, and get involved

  (see [Apache 2.0 License][license])



[issues]: https://github.com/aws/aws-sdk-go/issues

[pr]: https://github.com/aws/aws-sdk-go/pulls

[license]: http://aws.amazon.com/apache2.0/