accelbyte-go-sdk

README

AccelByte Go SDK

A software development kit (SDK) for interacting with AccelByte services written in Golang.

This SDK was generated from OpenAPI specification documents included in the spec directory.

Setup

This SDK requires go 1.18 or newer version to be installed.

Import SDK Project

Add the following to your project's go.mod:

require (
    github.com/AccelByte/accelbyte-go-sdk {VERSION}
)

Replace {VERSION} with a specific release version tag. When starting a new project, using the latest release version is recommended.

Environment Variables

The following environment variables need to be set when using ConfigRepository.

Name	Required	Example
AB_BASE_URL	Yes	https://demo.accelbyte.io
AB_CLIENT_ID	Yes	abcdef0123456789abcdef0123456789
AB_CLIENT_SECRET	Yes, but only if you use a confidential AB_CLIENT_ID	ab#c,d)ef(ab#c,d)ef(ab#c,d)ef(ab

Usage

Instantiation

// example for OAuth20 in IAM service
oAuth20Service := iam.OAuth20Service{
    Client:           factory.NewIamClient(auth.DefaultConfigRepositoryImpl()), 
    ConfigRepository: auth.DefaultConfigRepositoryImpl(), 
    TokenRepository:  auth.DefaultTokenRepositoryImpl(),
}

With Custom HTTP retry in the client

Use this to get SDK instance with HTTP retry functionality.

input := &o_auth2_0.TokenGrantV3Params{
		Password:  &password,
		Username:  &username,
		GrantType: o_auth2_0.TokenGrantV3PasswordConstant,
	}
input.RetryPolicy = &utils.Retry{
    Transport: OAuth20Service.Client.Runtime.Transport,
    MaxTries:  utils.MaxTries,
    Backoff:   utils.NewConstantBackoff(0),
    RetryCodes: map[int]bool{
        502: true, // add an error code for bad gateway
    },
}
ok, err := OAuth20Service.TokenGrantV3Short(input) // call the wrapper

Automatic Token Refresh

The Automatic Token Refresh is invoked by auth.RefreshTokenScheduler inside the login wrapper with the Default configuration and can be override. Use the following to get SDK instance with automatic token refresh functionality which is performed before each HTTP request but only if access token is almost expired.

oAuth20Service = &iam.OAuth20Service{
		Client:           factory.NewIamClient(auth.DefaultConfigRepositoryImpl()),
		ConfigRepository: auth.DefaultConfigRepositoryImpl(),
		TokenRepository:  auth.DefaultTokenRepositoryImpl(),
		RefreshTokenRepository: &auth.RefreshTokenImpl{ // override the default refresh token. For example, enable the AutoRefresh functionality or change RefreshRate
			RefreshRate: 0.5,
			AutoRefresh: true,
		},
	}

Use the repository to access all functions for refresh token.

On-demand Refresh Token (Preview)

The on-demand refresh token is intended to be used in environment where automatic refresh token cannot work properly e.g. AWS Lambda. The way to initialize it is similar to automatic refresh token except the AutoRefresh parameter must be set to false. After that, LoginOrRefreshClient or LoginOrRefresh for logging in using client token or username and password respectively can be used before calling any endpoints. These two functions are helper functions for developers to either login or refresh as required.

oAuth20Service = &iam.OAuth20Service{
    Client:           factory.NewIamClient(auth.DefaultConfigRepositoryImpl()),
    ConfigRepository: auth.DefaultConfigRepositoryImpl(),
    TokenRepository:  auth.DefaultTokenRepositoryImpl(),
    RefreshTokenRepository: &auth.RefreshTokenImpl{
        RefreshRate: 0.5,
        AutoRefresh: false, // must be set to false for on demand refresh token
    },
}
...
err := oauth.LoginOrRefreshClient("clientId", "clientSecret")   // use before calling endpoints, using client token
...
err := oauth.LoginOrRefresh("username", "password")     // use before calling endpoints, using username and password

Working example code for on-demand refresh token is available in ondemand-refresh-token.

Local Token Validation

Local token validation is available since version 0.37.0. To enable it, import the package

import (
    ...
    "github.com/AccelByte/accelbyte-go-sdk/services-api/pkg/utils/auth/validator"
    ...
)

configure authTokenValidator struct or use the existing one NewTokenValidator with the default localValidationActive is false. Invoked them with

tokenValidator := validator.NewTokenValidator(authService, time.Hour)
tokenValidator.Initialize()

err = tokenValidator.Validate(accessToken, &requiredPermission, &namespace, nil)

if want to set localValidationActive is true, use a TokenValidator directly and do this:

tokenValidator := &validator.TokenValidator{
		AuthService:     *oAuth20Service,
		RefreshInterval: time.Hour,

		Filter:                nil,
		JwkSet:                nil,
		JwtClaims:             validator.JWTClaims{},
		JwtEncoding:           *base64.URLEncoding.WithPadding(base64.NoPadding),
		PublicKeys:            make(map[string]*rsa.PublicKey),
		LocalValidationActive: true, // set here to true
		RevokedUsers:          make(map[string]time.Time),
		Roles:                 make(map[string]*iamclientmodels.ModelRoleResponseV3),
	}
	
tokenValidator.Initialize()

err = tokenValidator.Validate(accessToken, &requiredPermission, &namespace, nil)

Login

Login Using Username and Password

err := oAuth20Service.Login(username, password)
if err != nil {
    return err
}

Login Using OAuth Client (Public or Private)

err := oAuth20Service.LoginClient(clientId, clientSecret)
if err != nil {
    return err
}

Parse Access Token

Functionality to parse the access token is available in v0.50.0. The function exist alongside the Login functionality in OAuth20Service. To use it, import the package

import (
    ...
    "github.com/AccelByte/accelbyte-go-sdk/services-api/pkg/service/iam"
    ...
)

Get the token, and use ParseAccessToken function. Set the second parameter as true if it wants to validate before parse the access token

// get the access token string
accessToken, err := oAuth20Service.GetToken()
if err != nil {
    // fail here
}

// parse the token
parsedToken, err := oAuth20Service.ParseAccessToken(accessToken, true) // set true here to validate before parse the access token
if err != nil {
    // fail here
}

• if the boolean is false, it will not validate the token at all.
• if the boolean is true, it will validate remotely (call VerifyTokenV3 endpoint).
• if the boolean is true and call SetLocalValidation before ParseAccessToken, it will validate locally.

oAuth20Service.SetLocalValidation(true) // call this also to activate local validation

// parse the token
parsedToken, err := oAuth20Service.ParseAccessToken(accessToken, true) // set true here to validate before parsing the access token
if err != nil {
// fail here
}

Interacting with AccelByte Gaming Services HTTP Endpoints

As an example, we will get current user profile info using getMyProfileInfo endpoint available in basic service.

// Instantiate UserProfile (Basic service) and input model as the global variable
var (
    userProfileService = &basic.UserProfileService{
        Client:          factory.NewBasicClient(auth.DefaultConfigRepositoryImpl()), 
        TokenRepository: auth.DefaultTokenRepositoryImpl(),
    }
    input = &user_profile.GetUserProfileInfoParams{
        Namespace: namespace,
    }
)

// Login using username and password
err := oAuth20Service.Login(username, password)
if err != nil {
    return err
}

// Make a call to getMyProfileInfo endpoint through the wrapper
ok, err := userProfileService.GetMyProfileInfoShort(input)
if err != nil {
    return err
}

The basic-sdk contains 2 directories:

• basicclient contains the logic to make requests.
• basicclientmodels contains the models such as request and response models.

Client must create a struct that implement following interface:

• ConfigRepository is responsible to store configuration.
• TokenRepository is responsible to store access token.

For more details, see repository for the interface and cli samples on how to use it.

Interacting with AccelByte Gaming Services WebSocket Endpoints

To interact with AccelByte Gaming Services services which use WebSocket endpoints e.g. AccelByte Gaming Services Lobby Service, client should implement connectionutils/ConnectionManager interface.

ConnectionManager manages WebSocket connection that save, get and close the WebSocket connection. In other words, client should maintain WebSocket connection using ConnectionManager. For reference, see samples/cli/pkg/utils/connectionManager.go.

Refresh Token

getToken, errGetToken := oAuth20Service.TokenRepository.GetToken()
    if errGetToken != nil {
        // failed to get token
    }
	
hasExpired := repository.HasTokenExpired(*getToken) // use the repository of the sdk to get the available functions

Logout

err := oAuth20Service.Logout()
if err != nil {
    return err
}

Samples

Sample apps are available in the samples directory.

Documentation

Reference about AccelByte service endpoints and their corresponding SDK API is available in docs/operations directory.

Sample app documentations are available in the docs/samples directory.

For more information on how to use AccelByte services and SDKs, see docs.accelbyte.io.