Ejemplos de proveedores de identidad de Amazon Cognito que utilizan Go SDK V2 - AWS SDKEjemplos de código

Hay más AWS SDK ejemplos disponibles en el GitHub repositorio de AWS Doc SDK Examples.

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Ejemplos de proveedores de identidad de Amazon Cognito que utilizan Go SDK V2

Los siguientes ejemplos de código muestran cómo realizar acciones e implementar situaciones comunes mediante el uso de la AWS SDK for Go V2 con Amazon Cognito Identity Provider.

Las acciones son extractos de código de programas más grandes y deben ejecutarse en contexto. Mientras las acciones muestran cómo llamar a las funciones de servicio individuales, es posible ver las acciones en contexto en los escenarios relacionados.

Los escenarios son ejemplos de código que muestran cómo llevar a cabo una tarea específica a través de llamadas a varias funciones dentro del servicio o combinado con otros Servicios de AWS.

Cada ejemplo incluye un enlace al código fuente completo, donde puede encontrar instrucciones sobre cómo configurar y ejecutar el código en su contexto.

Introducción

En los siguientes ejemplos de código se muestra cómo empezar a utilizar Amazon Cognito.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

package main import ( "context" "fmt" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/config" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) // main uses the AWS SDK for Go V2 to create an Amazon Simple Notification Service // (Amazon SNS) client and list the topics in your account. // This example uses the default settings specified in your shared credentials // and config files. func main() { ctx := context.Background() sdkConfig, err := config.LoadDefaultConfig(ctx) if err != nil { fmt.Println("Couldn't load default configuration. Have you set up your AWS account?") fmt.Println(err) return } cognitoClient := cognitoidentityprovider.NewFromConfig(sdkConfig) fmt.Println("Let's list the user pools for your account.") var pools []types.UserPoolDescriptionType paginator := cognitoidentityprovider.NewListUserPoolsPaginator( cognitoClient, &cognitoidentityprovider.ListUserPoolsInput{MaxResults: aws.Int32(10)}) for paginator.HasMorePages() { output, err := paginator.NextPage(ctx) if err != nil { log.Printf("Couldn't get user pools. Here's why: %v\n", err) } else { pools = append(pools, output.UserPools...) } } if len(pools) == 0 { fmt.Println("You don't have any user pools!") } else { for _, pool := range pools { fmt.Printf("\t%v: %v\n", *pool.Name, *pool.Id) } } }
  • Para API obtener más información, consulte ListUserPoolsla AWS SDK for Go APIReferencia.

Acciones

En el siguiente ejemplo de código se muestra cómo usar AdminCreateUser.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

import ( "context" "errors" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) type CognitoActions struct { CognitoClient *cognitoidentityprovider.Client } // AdminCreateUser uses administrator credentials to add a user to a user pool. This method leaves the user // in a state that requires they enter a new password next time they sign in. func (actor CognitoActions) AdminCreateUser(ctx context.Context, userPoolId string, userName string, userEmail string) error { _, err := actor.CognitoClient.AdminCreateUser(ctx, &cognitoidentityprovider.AdminCreateUserInput{ UserPoolId: aws.String(userPoolId), Username: aws.String(userName), MessageAction: types.MessageActionTypeSuppress, UserAttributes: []types.AttributeType{{Name: aws.String("email"), Value: aws.String(userEmail)}}, }) if err != nil { var userExists *types.UsernameExistsException if errors.As(err, &userExists) { log.Printf("User %v already exists in the user pool.", userName) err = nil } else { log.Printf("Couldn't create user %v. Here's why: %v\n", userName, err) } } return err }
  • Para API obtener más información, consulte AdminCreateUserla AWS SDK for Go APIReferencia.

En el siguiente ejemplo de código se muestra cómo usar AdminSetUserPassword.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

import ( "context" "errors" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) type CognitoActions struct { CognitoClient *cognitoidentityprovider.Client } // AdminSetUserPassword uses administrator credentials to set a password for a user without requiring a // temporary password. func (actor CognitoActions) AdminSetUserPassword(ctx context.Context, userPoolId string, userName string, password string) error { _, err := actor.CognitoClient.AdminSetUserPassword(ctx, &cognitoidentityprovider.AdminSetUserPasswordInput{ Password: aws.String(password), UserPoolId: aws.String(userPoolId), Username: aws.String(userName), Permanent: true, }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't set password for user %v. Here's why: %v\n", userName, err) } } return err }

En el siguiente ejemplo de código se muestra cómo usar ConfirmForgotPassword.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

import ( "context" "errors" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) type CognitoActions struct { CognitoClient *cognitoidentityprovider.Client } // ConfirmForgotPassword confirms a user with a confirmation code and a new password. func (actor CognitoActions) ConfirmForgotPassword(ctx context.Context, clientId string, code string, userName string, password string) error { _, err := actor.CognitoClient.ConfirmForgotPassword(ctx, &cognitoidentityprovider.ConfirmForgotPasswordInput{ ClientId: aws.String(clientId), ConfirmationCode: aws.String(code), Password: aws.String(password), Username: aws.String(userName), }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't confirm user %v. Here's why: %v", userName, err) } } return err }

En el siguiente ejemplo de código se muestra cómo usar DeleteUser.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

import ( "context" "errors" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) type CognitoActions struct { CognitoClient *cognitoidentityprovider.Client } // DeleteUser removes a user from the user pool. func (actor CognitoActions) DeleteUser(ctx context.Context, userAccessToken string) error { _, err := actor.CognitoClient.DeleteUser(ctx, &cognitoidentityprovider.DeleteUserInput{ AccessToken: aws.String(userAccessToken), }) if err != nil { log.Printf("Couldn't delete user. Here's why: %v\n", err) } return err }
  • Para API obtener más información, consulte DeleteUserla AWS SDK for Go APIReferencia.

En el siguiente ejemplo de código se muestra cómo usar ForgotPassword.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

import ( "context" "errors" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) type CognitoActions struct { CognitoClient *cognitoidentityprovider.Client } // ForgotPassword starts a password recovery flow for a user. This flow typically sends a confirmation code // to the user's configured notification destination, such as email. func (actor CognitoActions) ForgotPassword(ctx context.Context, clientId string, userName string) (*types.CodeDeliveryDetailsType, error) { output, err := actor.CognitoClient.ForgotPassword(ctx, &cognitoidentityprovider.ForgotPasswordInput{ ClientId: aws.String(clientId), Username: aws.String(userName), }) if err != nil { log.Printf("Couldn't start password reset for user '%v'. Here;s why: %v\n", userName, err) } return output.CodeDeliveryDetails, err }
  • Para API obtener más información, consulte ForgotPasswordla AWS SDK for Go APIReferencia.

En el siguiente ejemplo de código se muestra cómo usar InitiateAuth.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

import ( "context" "errors" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) type CognitoActions struct { CognitoClient *cognitoidentityprovider.Client } // SignIn signs in a user to Amazon Cognito using a username and password authentication flow. func (actor CognitoActions) SignIn(ctx context.Context, clientId string, userName string, password string) (*types.AuthenticationResultType, error) { var authResult *types.AuthenticationResultType output, err := actor.CognitoClient.InitiateAuth(ctx, &cognitoidentityprovider.InitiateAuthInput{ AuthFlow: "USER_PASSWORD_AUTH", ClientId: aws.String(clientId), AuthParameters: map[string]string{"USERNAME": userName, "PASSWORD": password}, }) if err != nil { var resetRequired *types.PasswordResetRequiredException if errors.As(err, &resetRequired) { log.Println(*resetRequired.Message) } else { log.Printf("Couldn't sign in user %v. Here's why: %v\n", userName, err) } } else { authResult = output.AuthenticationResult } return authResult, err }
  • Para API obtener más información, consulte InitiateAuthla AWS SDK for Go APIReferencia.

En el siguiente ejemplo de código se muestra cómo usar ListUserPools.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

package main import ( "context" "fmt" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/config" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) // main uses the AWS SDK for Go V2 to create an Amazon Simple Notification Service // (Amazon SNS) client and list the topics in your account. // This example uses the default settings specified in your shared credentials // and config files. func main() { ctx := context.Background() sdkConfig, err := config.LoadDefaultConfig(ctx) if err != nil { fmt.Println("Couldn't load default configuration. Have you set up your AWS account?") fmt.Println(err) return } cognitoClient := cognitoidentityprovider.NewFromConfig(sdkConfig) fmt.Println("Let's list the user pools for your account.") var pools []types.UserPoolDescriptionType paginator := cognitoidentityprovider.NewListUserPoolsPaginator( cognitoClient, &cognitoidentityprovider.ListUserPoolsInput{MaxResults: aws.Int32(10)}) for paginator.HasMorePages() { output, err := paginator.NextPage(ctx) if err != nil { log.Printf("Couldn't get user pools. Here's why: %v\n", err) } else { pools = append(pools, output.UserPools...) } } if len(pools) == 0 { fmt.Println("You don't have any user pools!") } else { for _, pool := range pools { fmt.Printf("\t%v: %v\n", *pool.Name, *pool.Id) } } }
  • Para API obtener más información, consulte ListUserPoolsla AWS SDK for Go APIReferencia.

En el siguiente ejemplo de código se muestra cómo usar SignUp.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

import ( "context" "errors" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) type CognitoActions struct { CognitoClient *cognitoidentityprovider.Client } // SignUp signs up a user with Amazon Cognito. func (actor CognitoActions) SignUp(ctx context.Context, clientId string, userName string, password string, userEmail string) (bool, error) { confirmed := false output, err := actor.CognitoClient.SignUp(ctx, &cognitoidentityprovider.SignUpInput{ ClientId: aws.String(clientId), Password: aws.String(password), Username: aws.String(userName), UserAttributes: []types.AttributeType{ {Name: aws.String("email"), Value: aws.String(userEmail)}, }, }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't sign up user %v. Here's why: %v\n", userName, err) } } else { confirmed = output.UserConfirmed } return confirmed, err }
  • Para API obtener más información, consulte SignUpla AWS SDK for Go APIReferencia.

En el siguiente ejemplo de código se muestra cómo usar UpdateUserPool.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

import ( "context" "errors" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) type CognitoActions struct { CognitoClient *cognitoidentityprovider.Client } // Trigger and TriggerInfo define typed data for updating an Amazon Cognito trigger. type Trigger int const ( PreSignUp Trigger = iota UserMigration PostAuthentication ) type TriggerInfo struct { Trigger Trigger HandlerArn *string } // UpdateTriggers adds or removes Lambda triggers for a user pool. When a trigger is specified with a `nil` value, // it is removed from the user pool. func (actor CognitoActions) UpdateTriggers(ctx context.Context, userPoolId string, triggers ...TriggerInfo) error { output, err := actor.CognitoClient.DescribeUserPool(ctx, &cognitoidentityprovider.DescribeUserPoolInput{ UserPoolId: aws.String(userPoolId), }) if err != nil { log.Printf("Couldn't get info about user pool %v. Here's why: %v\n", userPoolId, err) return err } lambdaConfig := output.UserPool.LambdaConfig for _, trigger := range triggers { switch trigger.Trigger { case PreSignUp: lambdaConfig.PreSignUp = trigger.HandlerArn case UserMigration: lambdaConfig.UserMigration = trigger.HandlerArn case PostAuthentication: lambdaConfig.PostAuthentication = trigger.HandlerArn } } _, err = actor.CognitoClient.UpdateUserPool(ctx, &cognitoidentityprovider.UpdateUserPoolInput{ UserPoolId: aws.String(userPoolId), LambdaConfig: lambdaConfig, }) if err != nil { log.Printf("Couldn't update user pool %v. Here's why: %v\n", userPoolId, err) } return err }
  • Para API obtener más información, consulte UpdateUserPoolla AWS SDK for Go APIReferencia.

Escenarios

En el siguiente ejemplo de código, se muestra cómo confirmar de manera automática los usuarios conocidos de Amazon Cognito con una función de Lambda.

  • Configure un grupo de usuarios para que llame a una función de Lambda para el desencadenador PreSignUp.

  • Inscripción de un usuario mediante Amazon Cognito

  • La función de Lambda escanea una tabla de DynamoDB y confirma de manera automática los usuarios conocidos.

  • Inicie sesión con el nuevo usuario y, luego, elimine los recursos.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

Ejecutar un escenario interactivo en un símbolo del sistema.

import ( "context" "errors" "log" "strings" "user_pools_and_lambda_triggers/actions" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" "github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools" ) // AutoConfirm separates the steps of this scenario into individual functions so that // they are simpler to read and understand. type AutoConfirm struct { helper IScenarioHelper questioner demotools.IQuestioner resources Resources cognitoActor *actions.CognitoActions } // NewAutoConfirm constructs a new auto confirm runner. func NewAutoConfirm(sdkConfig aws.Config, questioner demotools.IQuestioner, helper IScenarioHelper) AutoConfirm { scenario := AutoConfirm{ helper: helper, questioner: questioner, resources: Resources{}, cognitoActor: &actions.CognitoActions{CognitoClient: cognitoidentityprovider.NewFromConfig(sdkConfig)}, } scenario.resources.init(scenario.cognitoActor, questioner) return scenario } // AddPreSignUpTrigger adds a Lambda handler as an invocation target for the PreSignUp trigger. func (runner *AutoConfirm) AddPreSignUpTrigger(ctx context.Context, userPoolId string, functionArn string) { log.Printf("Let's add a Lambda function to handle the PreSignUp trigger from Cognito.\n" + "This trigger happens when a user signs up, and lets your function take action before the main Cognito\n" + "sign up processing occurs.\n") err := runner.cognitoActor.UpdateTriggers( ctx, userPoolId, actions.TriggerInfo{Trigger: actions.PreSignUp, HandlerArn: aws.String(functionArn)}) if err != nil { panic(err) } log.Printf("Lambda function %v added to user pool %v to handle the PreSignUp trigger.\n", functionArn, userPoolId) } // SignUpUser signs up a user from the known user table with a password you specify. func (runner *AutoConfirm) SignUpUser(ctx context.Context, clientId string, usersTable string) (string, string) { log.Println("Let's sign up a user to your Cognito user pool. When the user's email matches an email in the\n" + "DynamoDB known users table, it is automatically verified and the user is confirmed.") knownUsers, err := runner.helper.GetKnownUsers(ctx, usersTable) if err != nil { panic(err) } userChoice := runner.questioner.AskChoice("Which user do you want to use?\n", knownUsers.UserNameList()) user := knownUsers.Users[userChoice] var signedUp bool var userConfirmed bool password := runner.questioner.AskPassword("Enter a password that has at least eight characters, uppercase, lowercase, numbers and symbols.\n"+ "(the password will not display as you type):", 8) for !signedUp { log.Printf("Signing up user '%v' with email '%v' to Cognito.\n", user.UserName, user.UserEmail) userConfirmed, err = runner.cognitoActor.SignUp(ctx, clientId, user.UserName, password, user.UserEmail) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { password = runner.questioner.AskPassword("Enter another password:", 8) } else { panic(err) } } else { signedUp = true } } log.Printf("User %v signed up, confirmed = %v.\n", user.UserName, userConfirmed) log.Println(strings.Repeat("-", 88)) return user.UserName, password } // SignInUser signs in a user. func (runner *AutoConfirm) SignInUser(ctx context.Context, clientId string, userName string, password string) string { runner.questioner.Ask("Press Enter when you're ready to continue.") log.Printf("Let's sign in as %v...\n", userName) authResult, err := runner.cognitoActor.SignIn(ctx, clientId, userName, password) if err != nil { panic(err) } log.Printf("Successfully signed in. Your access token starts with: %v...\n", (*authResult.AccessToken)[:10]) log.Println(strings.Repeat("-", 88)) return *authResult.AccessToken } // Run runs the scenario. func (runner *AutoConfirm) Run(ctx context.Context, stackName string) { defer func() { if r := recover(); r != nil { log.Println("Something went wrong with the demo.") runner.resources.Cleanup(ctx) } }() log.Println(strings.Repeat("-", 88)) log.Printf("Welcome\n") log.Println(strings.Repeat("-", 88)) stackOutputs, err := runner.helper.GetStackOutputs(ctx, stackName) if err != nil { panic(err) } runner.resources.userPoolId = stackOutputs["UserPoolId"] runner.helper.PopulateUserTable(ctx, stackOutputs["TableName"]) runner.AddPreSignUpTrigger(ctx, stackOutputs["UserPoolId"], stackOutputs["AutoConfirmFunctionArn"]) runner.resources.triggers = append(runner.resources.triggers, actions.PreSignUp) userName, password := runner.SignUpUser(ctx, stackOutputs["UserPoolClientId"], stackOutputs["TableName"]) runner.helper.ListRecentLogEvents(ctx, stackOutputs["AutoConfirmFunction"]) runner.resources.userAccessTokens = append(runner.resources.userAccessTokens, runner.SignInUser(ctx, stackOutputs["UserPoolClientId"], userName, password)) runner.resources.Cleanup(ctx) log.Println(strings.Repeat("-", 88)) log.Println("Thanks for watching!") log.Println(strings.Repeat("-", 88)) }

Controle el desencadenador PreSignUp con una función de Lambda.

import ( "context" "log" "os" "github.com/aws/aws-lambda-go/events" "github.com/aws/aws-lambda-go/lambda" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/config" "github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue" "github.com/aws/aws-sdk-go-v2/service/dynamodb" dynamodbtypes "github.com/aws/aws-sdk-go-v2/service/dynamodb/types" ) const TABLE_NAME = "TABLE_NAME" // UserInfo defines structured user data that can be marshalled to a DynamoDB format. type UserInfo struct { UserName string `dynamodbav:"UserName"` UserEmail string `dynamodbav:"UserEmail"` } // GetKey marshals the user email value to a DynamoDB key format. func (user UserInfo) GetKey() map[string]dynamodbtypes.AttributeValue { userEmail, err := attributevalue.Marshal(user.UserEmail) if err != nil { panic(err) } return map[string]dynamodbtypes.AttributeValue{"UserEmail": userEmail} } type handler struct { dynamoClient *dynamodb.Client } // HandleRequest handles the PreSignUp event by looking up a user in an Amazon DynamoDB table and // specifying whether they should be confirmed and verified. func (h *handler) HandleRequest(ctx context.Context, event events.CognitoEventUserPoolsPreSignup) (events.CognitoEventUserPoolsPreSignup, error) { log.Printf("Received presignup from %v for user '%v'", event.TriggerSource, event.UserName) if event.TriggerSource != "PreSignUp_SignUp" { // Other trigger sources, such as PreSignUp_AdminInitiateAuth, ignore the response from this handler. return event, nil } tableName := os.Getenv(TABLE_NAME) user := UserInfo{ UserEmail: event.Request.UserAttributes["email"], } log.Printf("Looking up email %v in table %v.\n", user.UserEmail, tableName) output, err := h.dynamoClient.GetItem(ctx, &dynamodb.GetItemInput{ Key: user.GetKey(), TableName: aws.String(tableName), }) if err != nil { log.Printf("Error looking up email %v.\n", user.UserEmail) return event, err } if output.Item == nil { log.Printf("Email %v not found. Email verification is required.\n", user.UserEmail) return event, err } err = attributevalue.UnmarshalMap(output.Item, &user) if err != nil { log.Printf("Couldn't unmarshal DynamoDB item. Here's why: %v\n", err) return event, err } if user.UserName != event.UserName { log.Printf("UserEmail %v found, but stored UserName '%v' does not match supplied UserName '%v'. Verification is required.\n", user.UserEmail, user.UserName, event.UserName) } else { log.Printf("UserEmail %v found with matching UserName %v. User is confirmed.\n", user.UserEmail, user.UserName) event.Response.AutoConfirmUser = true event.Response.AutoVerifyEmail = true } return event, err } func main() { ctx := context.Background() sdkConfig, err := config.LoadDefaultConfig(ctx) if err != nil { log.Panicln(err) } h := handler{ dynamoClient: dynamodb.NewFromConfig(sdkConfig), } lambda.Start(h.HandleRequest) }

Cree una estructura que lleve a cabo las tareas habituales.

import ( "context" "log" "strings" "time" "user_pools_and_lambda_triggers/actions" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cloudformation" "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs" "github.com/aws/aws-sdk-go-v2/service/dynamodb" "github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools" ) // IScenarioHelper defines common functions used by the workflows in this example. type IScenarioHelper interface { Pause(secs int) GetStackOutputs(ctx context.Context, stackName string) (actions.StackOutputs, error) PopulateUserTable(ctx context.Context, tableName string) GetKnownUsers(ctx context.Context, tableName string) (actions.UserList, error) AddKnownUser(ctx context.Context, tableName string, user actions.User) ListRecentLogEvents(ctx context.Context, functionName string) } // ScenarioHelper contains AWS wrapper structs used by the workflows in this example. type ScenarioHelper struct { questioner demotools.IQuestioner dynamoActor *actions.DynamoActions cfnActor *actions.CloudFormationActions cwlActor *actions.CloudWatchLogsActions isTestRun bool } // NewScenarioHelper constructs a new scenario helper. func NewScenarioHelper(sdkConfig aws.Config, questioner demotools.IQuestioner) ScenarioHelper { scenario := ScenarioHelper{ questioner: questioner, dynamoActor: &actions.DynamoActions{DynamoClient: dynamodb.NewFromConfig(sdkConfig)}, cfnActor: &actions.CloudFormationActions{CfnClient: cloudformation.NewFromConfig(sdkConfig)}, cwlActor: &actions.CloudWatchLogsActions{CwlClient: cloudwatchlogs.NewFromConfig(sdkConfig)}, } return scenario } // Pause waits for the specified number of seconds. func (helper ScenarioHelper) Pause(secs int) { if !helper.isTestRun { time.Sleep(time.Duration(secs) * time.Second) } } // GetStackOutputs gets the outputs from the specified CloudFormation stack in a structured format. func (helper ScenarioHelper) GetStackOutputs(ctx context.Context, stackName string) (actions.StackOutputs, error) { return helper.cfnActor.GetOutputs(ctx, stackName), nil } // PopulateUserTable fills the known user table with example data. func (helper ScenarioHelper) PopulateUserTable(ctx context.Context, tableName string) { log.Printf("First, let's add some users to the DynamoDB %v table we'll use for this example.\n", tableName) err := helper.dynamoActor.PopulateTable(ctx, tableName) if err != nil { panic(err) } } // GetKnownUsers gets the users from the known users table in a structured format. func (helper ScenarioHelper) GetKnownUsers(ctx context.Context, tableName string) (actions.UserList, error) { knownUsers, err := helper.dynamoActor.Scan(ctx, tableName) if err != nil { log.Printf("Couldn't get known users from table %v. Here's why: %v\n", tableName, err) } return knownUsers, err } // AddKnownUser adds a user to the known users table. func (helper ScenarioHelper) AddKnownUser(ctx context.Context, tableName string, user actions.User) { log.Printf("Adding user '%v' with email '%v' to the DynamoDB known users table...\n", user.UserName, user.UserEmail) err := helper.dynamoActor.AddUser(ctx, tableName, user) if err != nil { panic(err) } } // ListRecentLogEvents gets the most recent log stream and events for the specified Lambda function and displays them. func (helper ScenarioHelper) ListRecentLogEvents(ctx context.Context, functionName string) { log.Println("Waiting a few seconds to let Lambda write to CloudWatch Logs...") helper.Pause(10) log.Println("Okay, let's check the logs to find what's happened recently with your Lambda function.") logStream, err := helper.cwlActor.GetLatestLogStream(ctx, functionName) if err != nil { panic(err) } log.Printf("Getting some recent events from log stream %v\n", *logStream.LogStreamName) events, err := helper.cwlActor.GetLogEvents(ctx, functionName, *logStream.LogStreamName, 10) if err != nil { panic(err) } for _, event := range events { log.Printf("\t%v", *event.Message) } log.Println(strings.Repeat("-", 88)) }

Cree una estructura que ajuste las acciones de Amazon Cognito.

import ( "context" "errors" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) type CognitoActions struct { CognitoClient *cognitoidentityprovider.Client } // Trigger and TriggerInfo define typed data for updating an Amazon Cognito trigger. type Trigger int const ( PreSignUp Trigger = iota UserMigration PostAuthentication ) type TriggerInfo struct { Trigger Trigger HandlerArn *string } // UpdateTriggers adds or removes Lambda triggers for a user pool. When a trigger is specified with a `nil` value, // it is removed from the user pool. func (actor CognitoActions) UpdateTriggers(ctx context.Context, userPoolId string, triggers ...TriggerInfo) error { output, err := actor.CognitoClient.DescribeUserPool(ctx, &cognitoidentityprovider.DescribeUserPoolInput{ UserPoolId: aws.String(userPoolId), }) if err != nil { log.Printf("Couldn't get info about user pool %v. Here's why: %v\n", userPoolId, err) return err } lambdaConfig := output.UserPool.LambdaConfig for _, trigger := range triggers { switch trigger.Trigger { case PreSignUp: lambdaConfig.PreSignUp = trigger.HandlerArn case UserMigration: lambdaConfig.UserMigration = trigger.HandlerArn case PostAuthentication: lambdaConfig.PostAuthentication = trigger.HandlerArn } } _, err = actor.CognitoClient.UpdateUserPool(ctx, &cognitoidentityprovider.UpdateUserPoolInput{ UserPoolId: aws.String(userPoolId), LambdaConfig: lambdaConfig, }) if err != nil { log.Printf("Couldn't update user pool %v. Here's why: %v\n", userPoolId, err) } return err } // SignUp signs up a user with Amazon Cognito. func (actor CognitoActions) SignUp(ctx context.Context, clientId string, userName string, password string, userEmail string) (bool, error) { confirmed := false output, err := actor.CognitoClient.SignUp(ctx, &cognitoidentityprovider.SignUpInput{ ClientId: aws.String(clientId), Password: aws.String(password), Username: aws.String(userName), UserAttributes: []types.AttributeType{ {Name: aws.String("email"), Value: aws.String(userEmail)}, }, }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't sign up user %v. Here's why: %v\n", userName, err) } } else { confirmed = output.UserConfirmed } return confirmed, err } // SignIn signs in a user to Amazon Cognito using a username and password authentication flow. func (actor CognitoActions) SignIn(ctx context.Context, clientId string, userName string, password string) (*types.AuthenticationResultType, error) { var authResult *types.AuthenticationResultType output, err := actor.CognitoClient.InitiateAuth(ctx, &cognitoidentityprovider.InitiateAuthInput{ AuthFlow: "USER_PASSWORD_AUTH", ClientId: aws.String(clientId), AuthParameters: map[string]string{"USERNAME": userName, "PASSWORD": password}, }) if err != nil { var resetRequired *types.PasswordResetRequiredException if errors.As(err, &resetRequired) { log.Println(*resetRequired.Message) } else { log.Printf("Couldn't sign in user %v. Here's why: %v\n", userName, err) } } else { authResult = output.AuthenticationResult } return authResult, err } // ForgotPassword starts a password recovery flow for a user. This flow typically sends a confirmation code // to the user's configured notification destination, such as email. func (actor CognitoActions) ForgotPassword(ctx context.Context, clientId string, userName string) (*types.CodeDeliveryDetailsType, error) { output, err := actor.CognitoClient.ForgotPassword(ctx, &cognitoidentityprovider.ForgotPasswordInput{ ClientId: aws.String(clientId), Username: aws.String(userName), }) if err != nil { log.Printf("Couldn't start password reset for user '%v'. Here;s why: %v\n", userName, err) } return output.CodeDeliveryDetails, err } // ConfirmForgotPassword confirms a user with a confirmation code and a new password. func (actor CognitoActions) ConfirmForgotPassword(ctx context.Context, clientId string, code string, userName string, password string) error { _, err := actor.CognitoClient.ConfirmForgotPassword(ctx, &cognitoidentityprovider.ConfirmForgotPasswordInput{ ClientId: aws.String(clientId), ConfirmationCode: aws.String(code), Password: aws.String(password), Username: aws.String(userName), }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't confirm user %v. Here's why: %v", userName, err) } } return err } // DeleteUser removes a user from the user pool. func (actor CognitoActions) DeleteUser(ctx context.Context, userAccessToken string) error { _, err := actor.CognitoClient.DeleteUser(ctx, &cognitoidentityprovider.DeleteUserInput{ AccessToken: aws.String(userAccessToken), }) if err != nil { log.Printf("Couldn't delete user. Here's why: %v\n", err) } return err } // AdminCreateUser uses administrator credentials to add a user to a user pool. This method leaves the user // in a state that requires they enter a new password next time they sign in. func (actor CognitoActions) AdminCreateUser(ctx context.Context, userPoolId string, userName string, userEmail string) error { _, err := actor.CognitoClient.AdminCreateUser(ctx, &cognitoidentityprovider.AdminCreateUserInput{ UserPoolId: aws.String(userPoolId), Username: aws.String(userName), MessageAction: types.MessageActionTypeSuppress, UserAttributes: []types.AttributeType{{Name: aws.String("email"), Value: aws.String(userEmail)}}, }) if err != nil { var userExists *types.UsernameExistsException if errors.As(err, &userExists) { log.Printf("User %v already exists in the user pool.", userName) err = nil } else { log.Printf("Couldn't create user %v. Here's why: %v\n", userName, err) } } return err } // AdminSetUserPassword uses administrator credentials to set a password for a user without requiring a // temporary password. func (actor CognitoActions) AdminSetUserPassword(ctx context.Context, userPoolId string, userName string, password string) error { _, err := actor.CognitoClient.AdminSetUserPassword(ctx, &cognitoidentityprovider.AdminSetUserPasswordInput{ Password: aws.String(password), UserPoolId: aws.String(userPoolId), Username: aws.String(userName), Permanent: true, }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't set password for user %v. Here's why: %v\n", userName, err) } } return err }

Cree una estructura que ajuste las acciones de DynamoDB.

import ( "context" "fmt" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue" "github.com/aws/aws-sdk-go-v2/service/dynamodb" "github.com/aws/aws-sdk-go-v2/service/dynamodb/types" ) // DynamoActions encapsulates the Amazon Simple Notification Service (Amazon SNS) actions // used in the examples. type DynamoActions struct { DynamoClient *dynamodb.Client } // User defines structured user data. type User struct { UserName string UserEmail string LastLogin *LoginInfo `dynamodbav:",omitempty"` } // LoginInfo defines structured custom login data. type LoginInfo struct { UserPoolId string ClientId string Time string } // UserList defines a list of users. type UserList struct { Users []User } // UserNameList returns the usernames contained in a UserList as a list of strings. func (users *UserList) UserNameList() []string { names := make([]string, len(users.Users)) for i := 0; i < len(users.Users); i++ { names[i] = users.Users[i].UserName } return names } // PopulateTable adds a set of test users to the table. func (actor DynamoActions) PopulateTable(ctx context.Context, tableName string) error { var err error var item map[string]types.AttributeValue var writeReqs []types.WriteRequest for i := 1; i < 4; i++ { item, err = attributevalue.MarshalMap(User{UserName: fmt.Sprintf("test_user_%v", i), UserEmail: fmt.Sprintf("test_email_%v@example.com", i)}) if err != nil { log.Printf("Couldn't marshall user into DynamoDB format. Here's why: %v\n", err) return err } writeReqs = append(writeReqs, types.WriteRequest{PutRequest: &types.PutRequest{Item: item}}) } _, err = actor.DynamoClient.BatchWriteItem(ctx, &dynamodb.BatchWriteItemInput{ RequestItems: map[string][]types.WriteRequest{tableName: writeReqs}, }) if err != nil { log.Printf("Couldn't populate table %v with users. Here's why: %v\n", tableName, err) } return err } // Scan scans the table for all items. func (actor DynamoActions) Scan(ctx context.Context, tableName string) (UserList, error) { var userList UserList output, err := actor.DynamoClient.Scan(ctx, &dynamodb.ScanInput{ TableName: aws.String(tableName), }) if err != nil { log.Printf("Couldn't scan table %v for items. Here's why: %v\n", tableName, err) } else { err = attributevalue.UnmarshalListOfMaps(output.Items, &userList.Users) if err != nil { log.Printf("Couldn't unmarshal items into users. Here's why: %v\n", err) } } return userList, err } // AddUser adds a user item to a table. func (actor DynamoActions) AddUser(ctx context.Context, tableName string, user User) error { userItem, err := attributevalue.MarshalMap(user) if err != nil { log.Printf("Couldn't marshall user to item. Here's why: %v\n", err) } _, err = actor.DynamoClient.PutItem(ctx, &dynamodb.PutItemInput{ Item: userItem, TableName: aws.String(tableName), }) if err != nil { log.Printf("Couldn't put item in table %v. Here's why: %v", tableName, err) } return err }

Crea una estructura que abarque las acciones de CloudWatch Logs.

import ( "context" "fmt" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs" "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs/types" ) type CloudWatchLogsActions struct { CwlClient *cloudwatchlogs.Client } // GetLatestLogStream gets the most recent log stream for a Lambda function. func (actor CloudWatchLogsActions) GetLatestLogStream(ctx context.Context, functionName string) (types.LogStream, error) { var logStream types.LogStream logGroupName := fmt.Sprintf("/aws/lambda/%s", functionName) output, err := actor.CwlClient.DescribeLogStreams(ctx, &cloudwatchlogs.DescribeLogStreamsInput{ Descending: aws.Bool(true), Limit: aws.Int32(1), LogGroupName: aws.String(logGroupName), OrderBy: types.OrderByLastEventTime, }) if err != nil { log.Printf("Couldn't get log streams for log group %v. Here's why: %v\n", logGroupName, err) } else { logStream = output.LogStreams[0] } return logStream, err } // GetLogEvents gets the most recent eventCount events from the specified log stream. func (actor CloudWatchLogsActions) GetLogEvents(ctx context.Context, functionName string, logStreamName string, eventCount int32) ( []types.OutputLogEvent, error) { var events []types.OutputLogEvent logGroupName := fmt.Sprintf("/aws/lambda/%s", functionName) output, err := actor.CwlClient.GetLogEvents(ctx, &cloudwatchlogs.GetLogEventsInput{ LogStreamName: aws.String(logStreamName), Limit: aws.Int32(eventCount), LogGroupName: aws.String(logGroupName), }) if err != nil { log.Printf("Couldn't get log event for log stream %v. Here's why: %v\n", logStreamName, err) } else { events = output.Events } return events, err }

Crea una estructura que agrupe las acciones. AWS CloudFormation

import ( "context" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cloudformation" ) // StackOutputs defines a map of outputs from a specific stack. type StackOutputs map[string]string type CloudFormationActions struct { CfnClient *cloudformation.Client } // GetOutputs gets the outputs from a CloudFormation stack and puts them into a structured format. func (actor CloudFormationActions) GetOutputs(ctx context.Context, stackName string) StackOutputs { output, err := actor.CfnClient.DescribeStacks(ctx, &cloudformation.DescribeStacksInput{ StackName: aws.String(stackName), }) if err != nil || len(output.Stacks) == 0 { log.Panicf("Couldn't find a CloudFormation stack named %v. Here's why: %v\n", stackName, err) } stackOutputs := StackOutputs{} for _, out := range output.Stacks[0].Outputs { stackOutputs[*out.OutputKey] = *out.OutputValue } return stackOutputs }

Eliminación de recursos.

import ( "context" "log" "user_pools_and_lambda_triggers/actions" "github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools" ) // Resources keeps track of AWS resources created during an example and handles // cleanup when the example finishes. type Resources struct { userPoolId string userAccessTokens []string triggers []actions.Trigger cognitoActor *actions.CognitoActions questioner demotools.IQuestioner } func (resources *Resources) init(cognitoActor *actions.CognitoActions, questioner demotools.IQuestioner) { resources.userAccessTokens = []string{} resources.triggers = []actions.Trigger{} resources.cognitoActor = cognitoActor resources.questioner = questioner } // Cleanup deletes all AWS resources created during an example. func (resources *Resources) Cleanup(ctx context.Context) { defer func() { if r := recover(); r != nil { log.Printf("Something went wrong during cleanup.\n%v\n", r) log.Println("Use the AWS Management Console to remove any remaining resources \n" + "that were created for this scenario.") } }() wantDelete := resources.questioner.AskBool("Do you want to remove all of the AWS resources that were created "+ "during this demo (y/n)?", "y") if wantDelete { for _, accessToken := range resources.userAccessTokens { err := resources.cognitoActor.DeleteUser(ctx, accessToken) if err != nil { log.Println("Couldn't delete user during cleanup.") panic(err) } log.Println("Deleted user.") } triggerList := make([]actions.TriggerInfo, len(resources.triggers)) for i := 0; i < len(resources.triggers); i++ { triggerList[i] = actions.TriggerInfo{Trigger: resources.triggers[i], HandlerArn: nil} } err := resources.cognitoActor.UpdateTriggers(ctx, resources.userPoolId, triggerList...) if err != nil { log.Println("Couldn't update Cognito triggers during cleanup.") panic(err) } log.Println("Removed Cognito triggers from user pool.") } else { log.Println("Be sure to remove resources when you're done with them to avoid unexpected charges!") } }

En el siguiente ejemplo de código, se muestra cómo migrar de manera automática los usuarios conocidos de Amazon Cognito con una función de Lambda.

  • Configure un grupo de usuarios para que llame a una función de Lambda para el desencadenador MigrateUser.

  • Inicie sesión en Amazon Cognito con un nombre de usuario y un correo electrónico que no estén en el grupo de usuarios.

  • La función de Lambda escanea una tabla de DynamoDB y migra de manera automática los usuarios conocidos al grupo de usuarios.

  • Realice el flujo en caso de olvido de contraseña para restablecer la contraseña respecto del usuario migrado.

  • Inicie sesión como un nuevo usuario y, a continuación, elimine los recursos.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

Ejecutar un escenario interactivo en un símbolo del sistema.

import ( "context" "errors" "fmt" "log" "strings" "user_pools_and_lambda_triggers/actions" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" "github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools" ) // MigrateUser separates the steps of this scenario into individual functions so that // they are simpler to read and understand. type MigrateUser struct { helper IScenarioHelper questioner demotools.IQuestioner resources Resources cognitoActor *actions.CognitoActions } // NewMigrateUser constructs a new migrate user runner. func NewMigrateUser(sdkConfig aws.Config, questioner demotools.IQuestioner, helper IScenarioHelper) MigrateUser { scenario := MigrateUser{ helper: helper, questioner: questioner, resources: Resources{}, cognitoActor: &actions.CognitoActions{CognitoClient: cognitoidentityprovider.NewFromConfig(sdkConfig)}, } scenario.resources.init(scenario.cognitoActor, questioner) return scenario } // AddMigrateUserTrigger adds a Lambda handler as an invocation target for the MigrateUser trigger. func (runner *MigrateUser) AddMigrateUserTrigger(ctx context.Context, userPoolId string, functionArn string) { log.Printf("Let's add a Lambda function to handle the MigrateUser trigger from Cognito.\n" + "This trigger happens when an unknown user signs in, and lets your function take action before Cognito\n" + "rejects the user.\n\n") err := runner.cognitoActor.UpdateTriggers( ctx, userPoolId, actions.TriggerInfo{Trigger: actions.UserMigration, HandlerArn: aws.String(functionArn)}) if err != nil { panic(err) } log.Printf("Lambda function %v added to user pool %v to handle the MigrateUser trigger.\n", functionArn, userPoolId) log.Println(strings.Repeat("-", 88)) } // SignInUser adds a new user to the known users table and signs that user in to Amazon Cognito. func (runner *MigrateUser) SignInUser(ctx context.Context, usersTable string, clientId string) (bool, actions.User) { log.Println("Let's sign in a user to your Cognito user pool. When the username and email matches an entry in the\n" + "DynamoDB known users table, the email is automatically verified and the user is migrated to the Cognito user pool.") user := actions.User{} user.UserName = runner.questioner.Ask("\nEnter a username:") user.UserEmail = runner.questioner.Ask("\nEnter an email that you own. This email will be used to confirm user migration\n" + "during this example:") runner.helper.AddKnownUser(ctx, usersTable, user) var err error var resetRequired *types.PasswordResetRequiredException var authResult *types.AuthenticationResultType signedIn := false for !signedIn && resetRequired == nil { log.Printf("Signing in to Cognito as user '%v'. The expected result is a PasswordResetRequiredException.\n\n", user.UserName) authResult, err = runner.cognitoActor.SignIn(ctx, clientId, user.UserName, "_") if err != nil { if errors.As(err, &resetRequired) { log.Printf("\nUser '%v' is not in the Cognito user pool but was found in the DynamoDB known users table.\n"+ "User migration is started and a password reset is required.", user.UserName) } else { panic(err) } } else { log.Printf("User '%v' successfully signed in. This is unexpected and probably means you have not\n"+ "cleaned up a previous run of this scenario, so the user exist in the Cognito user pool.\n"+ "You can continue this example and select to clean up resources, or manually remove\n"+ "the user from your user pool and try again.", user.UserName) runner.resources.userAccessTokens = append(runner.resources.userAccessTokens, *authResult.AccessToken) signedIn = true } } log.Println(strings.Repeat("-", 88)) return resetRequired != nil, user } // ResetPassword starts a password recovery flow. func (runner *MigrateUser) ResetPassword(ctx context.Context, clientId string, user actions.User) { wantCode := runner.questioner.AskBool(fmt.Sprintf("In order to migrate the user to Cognito, you must be able to receive a confirmation\n"+ "code by email at %v. Do you want to send a code (y/n)?", user.UserEmail), "y") if !wantCode { log.Println("To complete this example and successfully migrate a user to Cognito, you must enter an email\n" + "you own that can receive a confirmation code.") return } codeDelivery, err := runner.cognitoActor.ForgotPassword(ctx, clientId, user.UserName) if err != nil { panic(err) } log.Printf("\nA confirmation code has been sent to %v.", *codeDelivery.Destination) code := runner.questioner.Ask("Check your email and enter it here:") confirmed := false password := runner.questioner.AskPassword("\nEnter a password that has at least eight characters, uppercase, lowercase, numbers and symbols.\n"+ "(the password will not display as you type):", 8) for !confirmed { log.Printf("\nConfirming password reset for user '%v'.\n", user.UserName) err = runner.cognitoActor.ConfirmForgotPassword(ctx, clientId, code, user.UserName, password) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { password = runner.questioner.AskPassword("\nEnter another password:", 8) } else { panic(err) } } else { confirmed = true } } log.Printf("User '%v' successfully confirmed and migrated.\n", user.UserName) log.Println("Signing in with your username and password...") authResult, err := runner.cognitoActor.SignIn(ctx, clientId, user.UserName, password) if err != nil { panic(err) } log.Printf("Successfully signed in. Your access token starts with: %v...\n", (*authResult.AccessToken)[:10]) runner.resources.userAccessTokens = append(runner.resources.userAccessTokens, *authResult.AccessToken) log.Println(strings.Repeat("-", 88)) } // Run runs the scenario. func (runner *MigrateUser) Run(ctx context.Context, stackName string) { defer func() { if r := recover(); r != nil { log.Println("Something went wrong with the demo.") runner.resources.Cleanup(ctx) } }() log.Println(strings.Repeat("-", 88)) log.Printf("Welcome\n") log.Println(strings.Repeat("-", 88)) stackOutputs, err := runner.helper.GetStackOutputs(ctx, stackName) if err != nil { panic(err) } runner.resources.userPoolId = stackOutputs["UserPoolId"] runner.AddMigrateUserTrigger(ctx, stackOutputs["UserPoolId"], stackOutputs["MigrateUserFunctionArn"]) runner.resources.triggers = append(runner.resources.triggers, actions.UserMigration) resetNeeded, user := runner.SignInUser(ctx, stackOutputs["TableName"], stackOutputs["UserPoolClientId"]) if resetNeeded { runner.helper.ListRecentLogEvents(ctx, stackOutputs["MigrateUserFunction"]) runner.ResetPassword(ctx, stackOutputs["UserPoolClientId"], user) } runner.resources.Cleanup(ctx) log.Println(strings.Repeat("-", 88)) log.Println("Thanks for watching!") log.Println(strings.Repeat("-", 88)) }

Controle el desencadenador MigrateUser con una función de Lambda.

import ( "context" "log" "os" "github.com/aws/aws-lambda-go/events" "github.com/aws/aws-lambda-go/lambda" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/config" "github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue" "github.com/aws/aws-sdk-go-v2/feature/dynamodb/expression" "github.com/aws/aws-sdk-go-v2/service/dynamodb" ) const TABLE_NAME = "TABLE_NAME" // UserInfo defines structured user data that can be marshalled to a DynamoDB format. type UserInfo struct { UserName string `dynamodbav:"UserName"` UserEmail string `dynamodbav:"UserEmail"` } type handler struct { dynamoClient *dynamodb.Client } // HandleRequest handles the MigrateUser event by looking up a user in an Amazon DynamoDB table and // specifying whether they should be migrated to the user pool. func (h *handler) HandleRequest(ctx context.Context, event events.CognitoEventUserPoolsMigrateUser) (events.CognitoEventUserPoolsMigrateUser, error) { log.Printf("Received migrate trigger from %v for user '%v'", event.TriggerSource, event.UserName) if event.TriggerSource != "UserMigration_Authentication" { return event, nil } tableName := os.Getenv(TABLE_NAME) user := UserInfo{ UserName: event.UserName, } log.Printf("Looking up user '%v' in table %v.\n", user.UserName, tableName) filterEx := expression.Name("UserName").Equal(expression.Value(user.UserName)) expr, err := expression.NewBuilder().WithFilter(filterEx).Build() if err != nil { log.Printf("Error building expression to query for user '%v'.\n", user.UserName) return event, err } output, err := h.dynamoClient.Scan(ctx, &dynamodb.ScanInput{ TableName: aws.String(tableName), FilterExpression: expr.Filter(), ExpressionAttributeNames: expr.Names(), ExpressionAttributeValues: expr.Values(), }) if err != nil { log.Printf("Error looking up user '%v'.\n", user.UserName) return event, err } if len(output.Items) == 0 { log.Printf("User '%v' not found, not migrating user.\n", user.UserName) return event, err } var users []UserInfo err = attributevalue.UnmarshalListOfMaps(output.Items, &users) if err != nil { log.Printf("Couldn't unmarshal DynamoDB items. Here's why: %v\n", err) return event, err } user = users[0] log.Printf("UserName '%v' found with email %v. User is migrated and must reset password.\n", user.UserName, user.UserEmail) event.CognitoEventUserPoolsMigrateUserResponse.UserAttributes = map[string]string{ "email": user.UserEmail, "email_verified": "true", // email_verified is required for the forgot password flow. } event.CognitoEventUserPoolsMigrateUserResponse.FinalUserStatus = "RESET_REQUIRED" event.CognitoEventUserPoolsMigrateUserResponse.MessageAction = "SUPPRESS" return event, err } func main() { ctx := context.Background() sdkConfig, err := config.LoadDefaultConfig(ctx) if err != nil { log.Panicln(err) } h := handler{ dynamoClient: dynamodb.NewFromConfig(sdkConfig), } lambda.Start(h.HandleRequest) }

Cree una estructura que lleve a cabo las tareas habituales.

import ( "context" "log" "strings" "time" "user_pools_and_lambda_triggers/actions" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cloudformation" "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs" "github.com/aws/aws-sdk-go-v2/service/dynamodb" "github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools" ) // IScenarioHelper defines common functions used by the workflows in this example. type IScenarioHelper interface { Pause(secs int) GetStackOutputs(ctx context.Context, stackName string) (actions.StackOutputs, error) PopulateUserTable(ctx context.Context, tableName string) GetKnownUsers(ctx context.Context, tableName string) (actions.UserList, error) AddKnownUser(ctx context.Context, tableName string, user actions.User) ListRecentLogEvents(ctx context.Context, functionName string) } // ScenarioHelper contains AWS wrapper structs used by the workflows in this example. type ScenarioHelper struct { questioner demotools.IQuestioner dynamoActor *actions.DynamoActions cfnActor *actions.CloudFormationActions cwlActor *actions.CloudWatchLogsActions isTestRun bool } // NewScenarioHelper constructs a new scenario helper. func NewScenarioHelper(sdkConfig aws.Config, questioner demotools.IQuestioner) ScenarioHelper { scenario := ScenarioHelper{ questioner: questioner, dynamoActor: &actions.DynamoActions{DynamoClient: dynamodb.NewFromConfig(sdkConfig)}, cfnActor: &actions.CloudFormationActions{CfnClient: cloudformation.NewFromConfig(sdkConfig)}, cwlActor: &actions.CloudWatchLogsActions{CwlClient: cloudwatchlogs.NewFromConfig(sdkConfig)}, } return scenario } // Pause waits for the specified number of seconds. func (helper ScenarioHelper) Pause(secs int) { if !helper.isTestRun { time.Sleep(time.Duration(secs) * time.Second) } } // GetStackOutputs gets the outputs from the specified CloudFormation stack in a structured format. func (helper ScenarioHelper) GetStackOutputs(ctx context.Context, stackName string) (actions.StackOutputs, error) { return helper.cfnActor.GetOutputs(ctx, stackName), nil } // PopulateUserTable fills the known user table with example data. func (helper ScenarioHelper) PopulateUserTable(ctx context.Context, tableName string) { log.Printf("First, let's add some users to the DynamoDB %v table we'll use for this example.\n", tableName) err := helper.dynamoActor.PopulateTable(ctx, tableName) if err != nil { panic(err) } } // GetKnownUsers gets the users from the known users table in a structured format. func (helper ScenarioHelper) GetKnownUsers(ctx context.Context, tableName string) (actions.UserList, error) { knownUsers, err := helper.dynamoActor.Scan(ctx, tableName) if err != nil { log.Printf("Couldn't get known users from table %v. Here's why: %v\n", tableName, err) } return knownUsers, err } // AddKnownUser adds a user to the known users table. func (helper ScenarioHelper) AddKnownUser(ctx context.Context, tableName string, user actions.User) { log.Printf("Adding user '%v' with email '%v' to the DynamoDB known users table...\n", user.UserName, user.UserEmail) err := helper.dynamoActor.AddUser(ctx, tableName, user) if err != nil { panic(err) } } // ListRecentLogEvents gets the most recent log stream and events for the specified Lambda function and displays them. func (helper ScenarioHelper) ListRecentLogEvents(ctx context.Context, functionName string) { log.Println("Waiting a few seconds to let Lambda write to CloudWatch Logs...") helper.Pause(10) log.Println("Okay, let's check the logs to find what's happened recently with your Lambda function.") logStream, err := helper.cwlActor.GetLatestLogStream(ctx, functionName) if err != nil { panic(err) } log.Printf("Getting some recent events from log stream %v\n", *logStream.LogStreamName) events, err := helper.cwlActor.GetLogEvents(ctx, functionName, *logStream.LogStreamName, 10) if err != nil { panic(err) } for _, event := range events { log.Printf("\t%v", *event.Message) } log.Println(strings.Repeat("-", 88)) }

Cree una estructura que ajuste las acciones de Amazon Cognito.

import ( "context" "errors" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) type CognitoActions struct { CognitoClient *cognitoidentityprovider.Client } // Trigger and TriggerInfo define typed data for updating an Amazon Cognito trigger. type Trigger int const ( PreSignUp Trigger = iota UserMigration PostAuthentication ) type TriggerInfo struct { Trigger Trigger HandlerArn *string } // UpdateTriggers adds or removes Lambda triggers for a user pool. When a trigger is specified with a `nil` value, // it is removed from the user pool. func (actor CognitoActions) UpdateTriggers(ctx context.Context, userPoolId string, triggers ...TriggerInfo) error { output, err := actor.CognitoClient.DescribeUserPool(ctx, &cognitoidentityprovider.DescribeUserPoolInput{ UserPoolId: aws.String(userPoolId), }) if err != nil { log.Printf("Couldn't get info about user pool %v. Here's why: %v\n", userPoolId, err) return err } lambdaConfig := output.UserPool.LambdaConfig for _, trigger := range triggers { switch trigger.Trigger { case PreSignUp: lambdaConfig.PreSignUp = trigger.HandlerArn case UserMigration: lambdaConfig.UserMigration = trigger.HandlerArn case PostAuthentication: lambdaConfig.PostAuthentication = trigger.HandlerArn } } _, err = actor.CognitoClient.UpdateUserPool(ctx, &cognitoidentityprovider.UpdateUserPoolInput{ UserPoolId: aws.String(userPoolId), LambdaConfig: lambdaConfig, }) if err != nil { log.Printf("Couldn't update user pool %v. Here's why: %v\n", userPoolId, err) } return err } // SignUp signs up a user with Amazon Cognito. func (actor CognitoActions) SignUp(ctx context.Context, clientId string, userName string, password string, userEmail string) (bool, error) { confirmed := false output, err := actor.CognitoClient.SignUp(ctx, &cognitoidentityprovider.SignUpInput{ ClientId: aws.String(clientId), Password: aws.String(password), Username: aws.String(userName), UserAttributes: []types.AttributeType{ {Name: aws.String("email"), Value: aws.String(userEmail)}, }, }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't sign up user %v. Here's why: %v\n", userName, err) } } else { confirmed = output.UserConfirmed } return confirmed, err } // SignIn signs in a user to Amazon Cognito using a username and password authentication flow. func (actor CognitoActions) SignIn(ctx context.Context, clientId string, userName string, password string) (*types.AuthenticationResultType, error) { var authResult *types.AuthenticationResultType output, err := actor.CognitoClient.InitiateAuth(ctx, &cognitoidentityprovider.InitiateAuthInput{ AuthFlow: "USER_PASSWORD_AUTH", ClientId: aws.String(clientId), AuthParameters: map[string]string{"USERNAME": userName, "PASSWORD": password}, }) if err != nil { var resetRequired *types.PasswordResetRequiredException if errors.As(err, &resetRequired) { log.Println(*resetRequired.Message) } else { log.Printf("Couldn't sign in user %v. Here's why: %v\n", userName, err) } } else { authResult = output.AuthenticationResult } return authResult, err } // ForgotPassword starts a password recovery flow for a user. This flow typically sends a confirmation code // to the user's configured notification destination, such as email. func (actor CognitoActions) ForgotPassword(ctx context.Context, clientId string, userName string) (*types.CodeDeliveryDetailsType, error) { output, err := actor.CognitoClient.ForgotPassword(ctx, &cognitoidentityprovider.ForgotPasswordInput{ ClientId: aws.String(clientId), Username: aws.String(userName), }) if err != nil { log.Printf("Couldn't start password reset for user '%v'. Here;s why: %v\n", userName, err) } return output.CodeDeliveryDetails, err } // ConfirmForgotPassword confirms a user with a confirmation code and a new password. func (actor CognitoActions) ConfirmForgotPassword(ctx context.Context, clientId string, code string, userName string, password string) error { _, err := actor.CognitoClient.ConfirmForgotPassword(ctx, &cognitoidentityprovider.ConfirmForgotPasswordInput{ ClientId: aws.String(clientId), ConfirmationCode: aws.String(code), Password: aws.String(password), Username: aws.String(userName), }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't confirm user %v. Here's why: %v", userName, err) } } return err } // DeleteUser removes a user from the user pool. func (actor CognitoActions) DeleteUser(ctx context.Context, userAccessToken string) error { _, err := actor.CognitoClient.DeleteUser(ctx, &cognitoidentityprovider.DeleteUserInput{ AccessToken: aws.String(userAccessToken), }) if err != nil { log.Printf("Couldn't delete user. Here's why: %v\n", err) } return err } // AdminCreateUser uses administrator credentials to add a user to a user pool. This method leaves the user // in a state that requires they enter a new password next time they sign in. func (actor CognitoActions) AdminCreateUser(ctx context.Context, userPoolId string, userName string, userEmail string) error { _, err := actor.CognitoClient.AdminCreateUser(ctx, &cognitoidentityprovider.AdminCreateUserInput{ UserPoolId: aws.String(userPoolId), Username: aws.String(userName), MessageAction: types.MessageActionTypeSuppress, UserAttributes: []types.AttributeType{{Name: aws.String("email"), Value: aws.String(userEmail)}}, }) if err != nil { var userExists *types.UsernameExistsException if errors.As(err, &userExists) { log.Printf("User %v already exists in the user pool.", userName) err = nil } else { log.Printf("Couldn't create user %v. Here's why: %v\n", userName, err) } } return err } // AdminSetUserPassword uses administrator credentials to set a password for a user without requiring a // temporary password. func (actor CognitoActions) AdminSetUserPassword(ctx context.Context, userPoolId string, userName string, password string) error { _, err := actor.CognitoClient.AdminSetUserPassword(ctx, &cognitoidentityprovider.AdminSetUserPasswordInput{ Password: aws.String(password), UserPoolId: aws.String(userPoolId), Username: aws.String(userName), Permanent: true, }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't set password for user %v. Here's why: %v\n", userName, err) } } return err }

Cree una estructura que ajuste las acciones de DynamoDB.

import ( "context" "fmt" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue" "github.com/aws/aws-sdk-go-v2/service/dynamodb" "github.com/aws/aws-sdk-go-v2/service/dynamodb/types" ) // DynamoActions encapsulates the Amazon Simple Notification Service (Amazon SNS) actions // used in the examples. type DynamoActions struct { DynamoClient *dynamodb.Client } // User defines structured user data. type User struct { UserName string UserEmail string LastLogin *LoginInfo `dynamodbav:",omitempty"` } // LoginInfo defines structured custom login data. type LoginInfo struct { UserPoolId string ClientId string Time string } // UserList defines a list of users. type UserList struct { Users []User } // UserNameList returns the usernames contained in a UserList as a list of strings. func (users *UserList) UserNameList() []string { names := make([]string, len(users.Users)) for i := 0; i < len(users.Users); i++ { names[i] = users.Users[i].UserName } return names } // PopulateTable adds a set of test users to the table. func (actor DynamoActions) PopulateTable(ctx context.Context, tableName string) error { var err error var item map[string]types.AttributeValue var writeReqs []types.WriteRequest for i := 1; i < 4; i++ { item, err = attributevalue.MarshalMap(User{UserName: fmt.Sprintf("test_user_%v", i), UserEmail: fmt.Sprintf("test_email_%v@example.com", i)}) if err != nil { log.Printf("Couldn't marshall user into DynamoDB format. Here's why: %v\n", err) return err } writeReqs = append(writeReqs, types.WriteRequest{PutRequest: &types.PutRequest{Item: item}}) } _, err = actor.DynamoClient.BatchWriteItem(ctx, &dynamodb.BatchWriteItemInput{ RequestItems: map[string][]types.WriteRequest{tableName: writeReqs}, }) if err != nil { log.Printf("Couldn't populate table %v with users. Here's why: %v\n", tableName, err) } return err } // Scan scans the table for all items. func (actor DynamoActions) Scan(ctx context.Context, tableName string) (UserList, error) { var userList UserList output, err := actor.DynamoClient.Scan(ctx, &dynamodb.ScanInput{ TableName: aws.String(tableName), }) if err != nil { log.Printf("Couldn't scan table %v for items. Here's why: %v\n", tableName, err) } else { err = attributevalue.UnmarshalListOfMaps(output.Items, &userList.Users) if err != nil { log.Printf("Couldn't unmarshal items into users. Here's why: %v\n", err) } } return userList, err } // AddUser adds a user item to a table. func (actor DynamoActions) AddUser(ctx context.Context, tableName string, user User) error { userItem, err := attributevalue.MarshalMap(user) if err != nil { log.Printf("Couldn't marshall user to item. Here's why: %v\n", err) } _, err = actor.DynamoClient.PutItem(ctx, &dynamodb.PutItemInput{ Item: userItem, TableName: aws.String(tableName), }) if err != nil { log.Printf("Couldn't put item in table %v. Here's why: %v", tableName, err) } return err }

Crea una estructura que abarque las acciones de CloudWatch Logs.

import ( "context" "fmt" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs" "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs/types" ) type CloudWatchLogsActions struct { CwlClient *cloudwatchlogs.Client } // GetLatestLogStream gets the most recent log stream for a Lambda function. func (actor CloudWatchLogsActions) GetLatestLogStream(ctx context.Context, functionName string) (types.LogStream, error) { var logStream types.LogStream logGroupName := fmt.Sprintf("/aws/lambda/%s", functionName) output, err := actor.CwlClient.DescribeLogStreams(ctx, &cloudwatchlogs.DescribeLogStreamsInput{ Descending: aws.Bool(true), Limit: aws.Int32(1), LogGroupName: aws.String(logGroupName), OrderBy: types.OrderByLastEventTime, }) if err != nil { log.Printf("Couldn't get log streams for log group %v. Here's why: %v\n", logGroupName, err) } else { logStream = output.LogStreams[0] } return logStream, err } // GetLogEvents gets the most recent eventCount events from the specified log stream. func (actor CloudWatchLogsActions) GetLogEvents(ctx context.Context, functionName string, logStreamName string, eventCount int32) ( []types.OutputLogEvent, error) { var events []types.OutputLogEvent logGroupName := fmt.Sprintf("/aws/lambda/%s", functionName) output, err := actor.CwlClient.GetLogEvents(ctx, &cloudwatchlogs.GetLogEventsInput{ LogStreamName: aws.String(logStreamName), Limit: aws.Int32(eventCount), LogGroupName: aws.String(logGroupName), }) if err != nil { log.Printf("Couldn't get log event for log stream %v. Here's why: %v\n", logStreamName, err) } else { events = output.Events } return events, err }

Crea una estructura que agrupe las acciones. AWS CloudFormation

import ( "context" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cloudformation" ) // StackOutputs defines a map of outputs from a specific stack. type StackOutputs map[string]string type CloudFormationActions struct { CfnClient *cloudformation.Client } // GetOutputs gets the outputs from a CloudFormation stack and puts them into a structured format. func (actor CloudFormationActions) GetOutputs(ctx context.Context, stackName string) StackOutputs { output, err := actor.CfnClient.DescribeStacks(ctx, &cloudformation.DescribeStacksInput{ StackName: aws.String(stackName), }) if err != nil || len(output.Stacks) == 0 { log.Panicf("Couldn't find a CloudFormation stack named %v. Here's why: %v\n", stackName, err) } stackOutputs := StackOutputs{} for _, out := range output.Stacks[0].Outputs { stackOutputs[*out.OutputKey] = *out.OutputValue } return stackOutputs }

Eliminación de recursos.

import ( "context" "log" "user_pools_and_lambda_triggers/actions" "github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools" ) // Resources keeps track of AWS resources created during an example and handles // cleanup when the example finishes. type Resources struct { userPoolId string userAccessTokens []string triggers []actions.Trigger cognitoActor *actions.CognitoActions questioner demotools.IQuestioner } func (resources *Resources) init(cognitoActor *actions.CognitoActions, questioner demotools.IQuestioner) { resources.userAccessTokens = []string{} resources.triggers = []actions.Trigger{} resources.cognitoActor = cognitoActor resources.questioner = questioner } // Cleanup deletes all AWS resources created during an example. func (resources *Resources) Cleanup(ctx context.Context) { defer func() { if r := recover(); r != nil { log.Printf("Something went wrong during cleanup.\n%v\n", r) log.Println("Use the AWS Management Console to remove any remaining resources \n" + "that were created for this scenario.") } }() wantDelete := resources.questioner.AskBool("Do you want to remove all of the AWS resources that were created "+ "during this demo (y/n)?", "y") if wantDelete { for _, accessToken := range resources.userAccessTokens { err := resources.cognitoActor.DeleteUser(ctx, accessToken) if err != nil { log.Println("Couldn't delete user during cleanup.") panic(err) } log.Println("Deleted user.") } triggerList := make([]actions.TriggerInfo, len(resources.triggers)) for i := 0; i < len(resources.triggers); i++ { triggerList[i] = actions.TriggerInfo{Trigger: resources.triggers[i], HandlerArn: nil} } err := resources.cognitoActor.UpdateTriggers(ctx, resources.userPoolId, triggerList...) if err != nil { log.Println("Couldn't update Cognito triggers during cleanup.") panic(err) } log.Println("Removed Cognito triggers from user pool.") } else { log.Println("Be sure to remove resources when you're done with them to avoid unexpected charges!") } }

En el siguiente ejemplo de código, se muestra cómo escribir datos de actividad personalizados con una función de Lambda tras la autenticación de usuarios de Amazon Cognito.

  • Utilice las funciones de administrador para añadir un usuario a un grupo de usuarios.

  • Configure un grupo de usuarios para que llame a una función de Lambda para el desencadenador PostAuthentication.

  • Inicie sesión con el nuevo usuario en Amazon Cognito.

  • La función Lambda escribe información personalizada en los CloudWatch registros y en una tabla de DynamoDB.

  • Obtenga y exhiba los datos personalizados de la tabla de DynamoDB y, a continuación, elimine los recursos.

SDKpara Go V2
nota

Hay más información GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS.

Ejecutar un escenario interactivo en un símbolo del sistema.

import ( "context" "errors" "log" "strings" "user_pools_and_lambda_triggers/actions" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" "github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools" ) // ActivityLog separates the steps of this scenario into individual functions so that // they are simpler to read and understand. type ActivityLog struct { helper IScenarioHelper questioner demotools.IQuestioner resources Resources cognitoActor *actions.CognitoActions } // NewActivityLog constructs a new activity log runner. func NewActivityLog(sdkConfig aws.Config, questioner demotools.IQuestioner, helper IScenarioHelper) ActivityLog { scenario := ActivityLog{ helper: helper, questioner: questioner, resources: Resources{}, cognitoActor: &actions.CognitoActions{CognitoClient: cognitoidentityprovider.NewFromConfig(sdkConfig)}, } scenario.resources.init(scenario.cognitoActor, questioner) return scenario } // AddUserToPool selects a user from the known users table and uses administrator credentials to add the user to the user pool. func (runner *ActivityLog) AddUserToPool(ctx context.Context, userPoolId string, tableName string) (string, string) { log.Println("To facilitate this example, let's add a user to the user pool using administrator privileges.") users, err := runner.helper.GetKnownUsers(ctx, tableName) if err != nil { panic(err) } user := users.Users[0] log.Printf("Adding known user %v to the user pool.\n", user.UserName) err = runner.cognitoActor.AdminCreateUser(ctx, userPoolId, user.UserName, user.UserEmail) if err != nil { panic(err) } pwSet := false password := runner.questioner.AskPassword("\nEnter a password that has at least eight characters, uppercase, lowercase, numbers and symbols.\n"+ "(the password will not display as you type):", 8) for !pwSet { log.Printf("\nSetting password for user '%v'.\n", user.UserName) err = runner.cognitoActor.AdminSetUserPassword(ctx, userPoolId, user.UserName, password) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { password = runner.questioner.AskPassword("\nEnter another password:", 8) } else { panic(err) } } else { pwSet = true } } log.Println(strings.Repeat("-", 88)) return user.UserName, password } // AddActivityLogTrigger adds a Lambda handler as an invocation target for the PostAuthentication trigger. func (runner *ActivityLog) AddActivityLogTrigger(ctx context.Context, userPoolId string, activityLogArn string) { log.Println("Let's add a Lambda function to handle the PostAuthentication trigger from Cognito.\n" + "This trigger happens after a user is authenticated, and lets your function take action, such as logging\n" + "the outcome.") err := runner.cognitoActor.UpdateTriggers( ctx, userPoolId, actions.TriggerInfo{Trigger: actions.PostAuthentication, HandlerArn: aws.String(activityLogArn)}) if err != nil { panic(err) } runner.resources.triggers = append(runner.resources.triggers, actions.PostAuthentication) log.Printf("Lambda function %v added to user pool %v to handle PostAuthentication Cognito trigger.\n", activityLogArn, userPoolId) log.Println(strings.Repeat("-", 88)) } // SignInUser signs in as the specified user. func (runner *ActivityLog) SignInUser(ctx context.Context, clientId string, userName string, password string) { log.Printf("Now we'll sign in user %v and check the results in the logs and the DynamoDB table.", userName) runner.questioner.Ask("Press Enter when you're ready.") authResult, err := runner.cognitoActor.SignIn(ctx, clientId, userName, password) if err != nil { panic(err) } log.Println("Sign in successful.", "The PostAuthentication Lambda handler writes custom information to CloudWatch Logs.") runner.resources.userAccessTokens = append(runner.resources.userAccessTokens, *authResult.AccessToken) } // GetKnownUserLastLogin gets the login info for a user from the Amazon DynamoDB table and displays it. func (runner *ActivityLog) GetKnownUserLastLogin(ctx context.Context, tableName string, userName string) { log.Println("The PostAuthentication handler also writes login data to the DynamoDB table.") runner.questioner.Ask("Press Enter when you're ready to continue.") users, err := runner.helper.GetKnownUsers(ctx, tableName) if err != nil { panic(err) } for _, user := range users.Users { if user.UserName == userName { log.Println("The last login info for the user in the known users table is:") log.Printf("\t%+v", *user.LastLogin) } } log.Println(strings.Repeat("-", 88)) } // Run runs the scenario. func (runner *ActivityLog) Run(ctx context.Context, stackName string) { defer func() { if r := recover(); r != nil { log.Println("Something went wrong with the demo.") runner.resources.Cleanup(ctx) } }() log.Println(strings.Repeat("-", 88)) log.Printf("Welcome\n") log.Println(strings.Repeat("-", 88)) stackOutputs, err := runner.helper.GetStackOutputs(ctx, stackName) if err != nil { panic(err) } runner.resources.userPoolId = stackOutputs["UserPoolId"] runner.helper.PopulateUserTable(ctx, stackOutputs["TableName"]) userName, password := runner.AddUserToPool(ctx, stackOutputs["UserPoolId"], stackOutputs["TableName"]) runner.AddActivityLogTrigger(ctx, stackOutputs["UserPoolId"], stackOutputs["ActivityLogFunctionArn"]) runner.SignInUser(ctx, stackOutputs["UserPoolClientId"], userName, password) runner.helper.ListRecentLogEvents(ctx, stackOutputs["ActivityLogFunction"]) runner.GetKnownUserLastLogin(ctx, stackOutputs["TableName"], userName) runner.resources.Cleanup(ctx) log.Println(strings.Repeat("-", 88)) log.Println("Thanks for watching!") log.Println(strings.Repeat("-", 88)) }

Controle el desencadenador PostAuthentication con una función de Lambda.

import ( "context" "fmt" "log" "os" "time" "github.com/aws/aws-lambda-go/events" "github.com/aws/aws-lambda-go/lambda" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/config" "github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue" "github.com/aws/aws-sdk-go-v2/service/dynamodb" dynamodbtypes "github.com/aws/aws-sdk-go-v2/service/dynamodb/types" ) const TABLE_NAME = "TABLE_NAME" // LoginInfo defines structured login data that can be marshalled to a DynamoDB format. type LoginInfo struct { UserPoolId string `dynamodbav:"UserPoolId"` ClientId string `dynamodbav:"ClientId"` Time string `dynamodbav:"Time"` } // UserInfo defines structured user data that can be marshalled to a DynamoDB format. type UserInfo struct { UserName string `dynamodbav:"UserName"` UserEmail string `dynamodbav:"UserEmail"` LastLogin LoginInfo `dynamodbav:"LastLogin"` } // GetKey marshals the user email value to a DynamoDB key format. func (user UserInfo) GetKey() map[string]dynamodbtypes.AttributeValue { userEmail, err := attributevalue.Marshal(user.UserEmail) if err != nil { panic(err) } return map[string]dynamodbtypes.AttributeValue{"UserEmail": userEmail} } type handler struct { dynamoClient *dynamodb.Client } // HandleRequest handles the PostAuthentication event by writing custom data to the logs and // to an Amazon DynamoDB table. func (h *handler) HandleRequest(ctx context.Context, event events.CognitoEventUserPoolsPostAuthentication) (events.CognitoEventUserPoolsPostAuthentication, error) { log.Printf("Received post authentication trigger from %v for user '%v'", event.TriggerSource, event.UserName) tableName := os.Getenv(TABLE_NAME) user := UserInfo{ UserName: event.UserName, UserEmail: event.Request.UserAttributes["email"], LastLogin: LoginInfo{ UserPoolId: event.UserPoolID, ClientId: event.CallerContext.ClientID, Time: time.Now().Format(time.UnixDate), }, } // Write to CloudWatch Logs. fmt.Printf("%#v", user) // Also write to an external system. This examples uses DynamoDB to demonstrate. userMap, err := attributevalue.MarshalMap(user) if err != nil { log.Printf("Couldn't marshal to DynamoDB map. Here's why: %v\n", err) } else if len(userMap) == 0 { log.Printf("User info marshaled to an empty map.") } else { _, err := h.dynamoClient.PutItem(ctx, &dynamodb.PutItemInput{ Item: userMap, TableName: aws.String(tableName), }) if err != nil { log.Printf("Couldn't write to DynamoDB. Here's why: %v\n", err) } else { log.Printf("Wrote user info to DynamoDB table %v.\n", tableName) } } return event, nil } func main() { ctx := context.Background() sdkConfig, err := config.LoadDefaultConfig(ctx) if err != nil { log.Panicln(err) } h := handler{ dynamoClient: dynamodb.NewFromConfig(sdkConfig), } lambda.Start(h.HandleRequest) }

Cree una estructura que lleve a cabo las tareas habituales.

import ( "context" "log" "strings" "time" "user_pools_and_lambda_triggers/actions" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cloudformation" "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs" "github.com/aws/aws-sdk-go-v2/service/dynamodb" "github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools" ) // IScenarioHelper defines common functions used by the workflows in this example. type IScenarioHelper interface { Pause(secs int) GetStackOutputs(ctx context.Context, stackName string) (actions.StackOutputs, error) PopulateUserTable(ctx context.Context, tableName string) GetKnownUsers(ctx context.Context, tableName string) (actions.UserList, error) AddKnownUser(ctx context.Context, tableName string, user actions.User) ListRecentLogEvents(ctx context.Context, functionName string) } // ScenarioHelper contains AWS wrapper structs used by the workflows in this example. type ScenarioHelper struct { questioner demotools.IQuestioner dynamoActor *actions.DynamoActions cfnActor *actions.CloudFormationActions cwlActor *actions.CloudWatchLogsActions isTestRun bool } // NewScenarioHelper constructs a new scenario helper. func NewScenarioHelper(sdkConfig aws.Config, questioner demotools.IQuestioner) ScenarioHelper { scenario := ScenarioHelper{ questioner: questioner, dynamoActor: &actions.DynamoActions{DynamoClient: dynamodb.NewFromConfig(sdkConfig)}, cfnActor: &actions.CloudFormationActions{CfnClient: cloudformation.NewFromConfig(sdkConfig)}, cwlActor: &actions.CloudWatchLogsActions{CwlClient: cloudwatchlogs.NewFromConfig(sdkConfig)}, } return scenario } // Pause waits for the specified number of seconds. func (helper ScenarioHelper) Pause(secs int) { if !helper.isTestRun { time.Sleep(time.Duration(secs) * time.Second) } } // GetStackOutputs gets the outputs from the specified CloudFormation stack in a structured format. func (helper ScenarioHelper) GetStackOutputs(ctx context.Context, stackName string) (actions.StackOutputs, error) { return helper.cfnActor.GetOutputs(ctx, stackName), nil } // PopulateUserTable fills the known user table with example data. func (helper ScenarioHelper) PopulateUserTable(ctx context.Context, tableName string) { log.Printf("First, let's add some users to the DynamoDB %v table we'll use for this example.\n", tableName) err := helper.dynamoActor.PopulateTable(ctx, tableName) if err != nil { panic(err) } } // GetKnownUsers gets the users from the known users table in a structured format. func (helper ScenarioHelper) GetKnownUsers(ctx context.Context, tableName string) (actions.UserList, error) { knownUsers, err := helper.dynamoActor.Scan(ctx, tableName) if err != nil { log.Printf("Couldn't get known users from table %v. Here's why: %v\n", tableName, err) } return knownUsers, err } // AddKnownUser adds a user to the known users table. func (helper ScenarioHelper) AddKnownUser(ctx context.Context, tableName string, user actions.User) { log.Printf("Adding user '%v' with email '%v' to the DynamoDB known users table...\n", user.UserName, user.UserEmail) err := helper.dynamoActor.AddUser(ctx, tableName, user) if err != nil { panic(err) } } // ListRecentLogEvents gets the most recent log stream and events for the specified Lambda function and displays them. func (helper ScenarioHelper) ListRecentLogEvents(ctx context.Context, functionName string) { log.Println("Waiting a few seconds to let Lambda write to CloudWatch Logs...") helper.Pause(10) log.Println("Okay, let's check the logs to find what's happened recently with your Lambda function.") logStream, err := helper.cwlActor.GetLatestLogStream(ctx, functionName) if err != nil { panic(err) } log.Printf("Getting some recent events from log stream %v\n", *logStream.LogStreamName) events, err := helper.cwlActor.GetLogEvents(ctx, functionName, *logStream.LogStreamName, 10) if err != nil { panic(err) } for _, event := range events { log.Printf("\t%v", *event.Message) } log.Println(strings.Repeat("-", 88)) }

Cree una estructura que ajuste las acciones de Amazon Cognito.

import ( "context" "errors" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider" "github.com/aws/aws-sdk-go-v2/service/cognitoidentityprovider/types" ) type CognitoActions struct { CognitoClient *cognitoidentityprovider.Client } // Trigger and TriggerInfo define typed data for updating an Amazon Cognito trigger. type Trigger int const ( PreSignUp Trigger = iota UserMigration PostAuthentication ) type TriggerInfo struct { Trigger Trigger HandlerArn *string } // UpdateTriggers adds or removes Lambda triggers for a user pool. When a trigger is specified with a `nil` value, // it is removed from the user pool. func (actor CognitoActions) UpdateTriggers(ctx context.Context, userPoolId string, triggers ...TriggerInfo) error { output, err := actor.CognitoClient.DescribeUserPool(ctx, &cognitoidentityprovider.DescribeUserPoolInput{ UserPoolId: aws.String(userPoolId), }) if err != nil { log.Printf("Couldn't get info about user pool %v. Here's why: %v\n", userPoolId, err) return err } lambdaConfig := output.UserPool.LambdaConfig for _, trigger := range triggers { switch trigger.Trigger { case PreSignUp: lambdaConfig.PreSignUp = trigger.HandlerArn case UserMigration: lambdaConfig.UserMigration = trigger.HandlerArn case PostAuthentication: lambdaConfig.PostAuthentication = trigger.HandlerArn } } _, err = actor.CognitoClient.UpdateUserPool(ctx, &cognitoidentityprovider.UpdateUserPoolInput{ UserPoolId: aws.String(userPoolId), LambdaConfig: lambdaConfig, }) if err != nil { log.Printf("Couldn't update user pool %v. Here's why: %v\n", userPoolId, err) } return err } // SignUp signs up a user with Amazon Cognito. func (actor CognitoActions) SignUp(ctx context.Context, clientId string, userName string, password string, userEmail string) (bool, error) { confirmed := false output, err := actor.CognitoClient.SignUp(ctx, &cognitoidentityprovider.SignUpInput{ ClientId: aws.String(clientId), Password: aws.String(password), Username: aws.String(userName), UserAttributes: []types.AttributeType{ {Name: aws.String("email"), Value: aws.String(userEmail)}, }, }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't sign up user %v. Here's why: %v\n", userName, err) } } else { confirmed = output.UserConfirmed } return confirmed, err } // SignIn signs in a user to Amazon Cognito using a username and password authentication flow. func (actor CognitoActions) SignIn(ctx context.Context, clientId string, userName string, password string) (*types.AuthenticationResultType, error) { var authResult *types.AuthenticationResultType output, err := actor.CognitoClient.InitiateAuth(ctx, &cognitoidentityprovider.InitiateAuthInput{ AuthFlow: "USER_PASSWORD_AUTH", ClientId: aws.String(clientId), AuthParameters: map[string]string{"USERNAME": userName, "PASSWORD": password}, }) if err != nil { var resetRequired *types.PasswordResetRequiredException if errors.As(err, &resetRequired) { log.Println(*resetRequired.Message) } else { log.Printf("Couldn't sign in user %v. Here's why: %v\n", userName, err) } } else { authResult = output.AuthenticationResult } return authResult, err } // ForgotPassword starts a password recovery flow for a user. This flow typically sends a confirmation code // to the user's configured notification destination, such as email. func (actor CognitoActions) ForgotPassword(ctx context.Context, clientId string, userName string) (*types.CodeDeliveryDetailsType, error) { output, err := actor.CognitoClient.ForgotPassword(ctx, &cognitoidentityprovider.ForgotPasswordInput{ ClientId: aws.String(clientId), Username: aws.String(userName), }) if err != nil { log.Printf("Couldn't start password reset for user '%v'. Here;s why: %v\n", userName, err) } return output.CodeDeliveryDetails, err } // ConfirmForgotPassword confirms a user with a confirmation code and a new password. func (actor CognitoActions) ConfirmForgotPassword(ctx context.Context, clientId string, code string, userName string, password string) error { _, err := actor.CognitoClient.ConfirmForgotPassword(ctx, &cognitoidentityprovider.ConfirmForgotPasswordInput{ ClientId: aws.String(clientId), ConfirmationCode: aws.String(code), Password: aws.String(password), Username: aws.String(userName), }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't confirm user %v. Here's why: %v", userName, err) } } return err } // DeleteUser removes a user from the user pool. func (actor CognitoActions) DeleteUser(ctx context.Context, userAccessToken string) error { _, err := actor.CognitoClient.DeleteUser(ctx, &cognitoidentityprovider.DeleteUserInput{ AccessToken: aws.String(userAccessToken), }) if err != nil { log.Printf("Couldn't delete user. Here's why: %v\n", err) } return err } // AdminCreateUser uses administrator credentials to add a user to a user pool. This method leaves the user // in a state that requires they enter a new password next time they sign in. func (actor CognitoActions) AdminCreateUser(ctx context.Context, userPoolId string, userName string, userEmail string) error { _, err := actor.CognitoClient.AdminCreateUser(ctx, &cognitoidentityprovider.AdminCreateUserInput{ UserPoolId: aws.String(userPoolId), Username: aws.String(userName), MessageAction: types.MessageActionTypeSuppress, UserAttributes: []types.AttributeType{{Name: aws.String("email"), Value: aws.String(userEmail)}}, }) if err != nil { var userExists *types.UsernameExistsException if errors.As(err, &userExists) { log.Printf("User %v already exists in the user pool.", userName) err = nil } else { log.Printf("Couldn't create user %v. Here's why: %v\n", userName, err) } } return err } // AdminSetUserPassword uses administrator credentials to set a password for a user without requiring a // temporary password. func (actor CognitoActions) AdminSetUserPassword(ctx context.Context, userPoolId string, userName string, password string) error { _, err := actor.CognitoClient.AdminSetUserPassword(ctx, &cognitoidentityprovider.AdminSetUserPasswordInput{ Password: aws.String(password), UserPoolId: aws.String(userPoolId), Username: aws.String(userName), Permanent: true, }) if err != nil { var invalidPassword *types.InvalidPasswordException if errors.As(err, &invalidPassword) { log.Println(*invalidPassword.Message) } else { log.Printf("Couldn't set password for user %v. Here's why: %v\n", userName, err) } } return err }

Cree una estructura que ajuste las acciones de DynamoDB.

import ( "context" "fmt" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue" "github.com/aws/aws-sdk-go-v2/service/dynamodb" "github.com/aws/aws-sdk-go-v2/service/dynamodb/types" ) // DynamoActions encapsulates the Amazon Simple Notification Service (Amazon SNS) actions // used in the examples. type DynamoActions struct { DynamoClient *dynamodb.Client } // User defines structured user data. type User struct { UserName string UserEmail string LastLogin *LoginInfo `dynamodbav:",omitempty"` } // LoginInfo defines structured custom login data. type LoginInfo struct { UserPoolId string ClientId string Time string } // UserList defines a list of users. type UserList struct { Users []User } // UserNameList returns the usernames contained in a UserList as a list of strings. func (users *UserList) UserNameList() []string { names := make([]string, len(users.Users)) for i := 0; i < len(users.Users); i++ { names[i] = users.Users[i].UserName } return names } // PopulateTable adds a set of test users to the table. func (actor DynamoActions) PopulateTable(ctx context.Context, tableName string) error { var err error var item map[string]types.AttributeValue var writeReqs []types.WriteRequest for i := 1; i < 4; i++ { item, err = attributevalue.MarshalMap(User{UserName: fmt.Sprintf("test_user_%v", i), UserEmail: fmt.Sprintf("test_email_%v@example.com", i)}) if err != nil { log.Printf("Couldn't marshall user into DynamoDB format. Here's why: %v\n", err) return err } writeReqs = append(writeReqs, types.WriteRequest{PutRequest: &types.PutRequest{Item: item}}) } _, err = actor.DynamoClient.BatchWriteItem(ctx, &dynamodb.BatchWriteItemInput{ RequestItems: map[string][]types.WriteRequest{tableName: writeReqs}, }) if err != nil { log.Printf("Couldn't populate table %v with users. Here's why: %v\n", tableName, err) } return err } // Scan scans the table for all items. func (actor DynamoActions) Scan(ctx context.Context, tableName string) (UserList, error) { var userList UserList output, err := actor.DynamoClient.Scan(ctx, &dynamodb.ScanInput{ TableName: aws.String(tableName), }) if err != nil { log.Printf("Couldn't scan table %v for items. Here's why: %v\n", tableName, err) } else { err = attributevalue.UnmarshalListOfMaps(output.Items, &userList.Users) if err != nil { log.Printf("Couldn't unmarshal items into users. Here's why: %v\n", err) } } return userList, err } // AddUser adds a user item to a table. func (actor DynamoActions) AddUser(ctx context.Context, tableName string, user User) error { userItem, err := attributevalue.MarshalMap(user) if err != nil { log.Printf("Couldn't marshall user to item. Here's why: %v\n", err) } _, err = actor.DynamoClient.PutItem(ctx, &dynamodb.PutItemInput{ Item: userItem, TableName: aws.String(tableName), }) if err != nil { log.Printf("Couldn't put item in table %v. Here's why: %v", tableName, err) } return err }

Crea una estructura que abarque las acciones de CloudWatch Logs.

import ( "context" "fmt" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs" "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs/types" ) type CloudWatchLogsActions struct { CwlClient *cloudwatchlogs.Client } // GetLatestLogStream gets the most recent log stream for a Lambda function. func (actor CloudWatchLogsActions) GetLatestLogStream(ctx context.Context, functionName string) (types.LogStream, error) { var logStream types.LogStream logGroupName := fmt.Sprintf("/aws/lambda/%s", functionName) output, err := actor.CwlClient.DescribeLogStreams(ctx, &cloudwatchlogs.DescribeLogStreamsInput{ Descending: aws.Bool(true), Limit: aws.Int32(1), LogGroupName: aws.String(logGroupName), OrderBy: types.OrderByLastEventTime, }) if err != nil { log.Printf("Couldn't get log streams for log group %v. Here's why: %v\n", logGroupName, err) } else { logStream = output.LogStreams[0] } return logStream, err } // GetLogEvents gets the most recent eventCount events from the specified log stream. func (actor CloudWatchLogsActions) GetLogEvents(ctx context.Context, functionName string, logStreamName string, eventCount int32) ( []types.OutputLogEvent, error) { var events []types.OutputLogEvent logGroupName := fmt.Sprintf("/aws/lambda/%s", functionName) output, err := actor.CwlClient.GetLogEvents(ctx, &cloudwatchlogs.GetLogEventsInput{ LogStreamName: aws.String(logStreamName), Limit: aws.Int32(eventCount), LogGroupName: aws.String(logGroupName), }) if err != nil { log.Printf("Couldn't get log event for log stream %v. Here's why: %v\n", logStreamName, err) } else { events = output.Events } return events, err }

Crea una estructura que agrupe las acciones. AWS CloudFormation

import ( "context" "log" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/cloudformation" ) // StackOutputs defines a map of outputs from a specific stack. type StackOutputs map[string]string type CloudFormationActions struct { CfnClient *cloudformation.Client } // GetOutputs gets the outputs from a CloudFormation stack and puts them into a structured format. func (actor CloudFormationActions) GetOutputs(ctx context.Context, stackName string) StackOutputs { output, err := actor.CfnClient.DescribeStacks(ctx, &cloudformation.DescribeStacksInput{ StackName: aws.String(stackName), }) if err != nil || len(output.Stacks) == 0 { log.Panicf("Couldn't find a CloudFormation stack named %v. Here's why: %v\n", stackName, err) } stackOutputs := StackOutputs{} for _, out := range output.Stacks[0].Outputs { stackOutputs[*out.OutputKey] = *out.OutputValue } return stackOutputs }

Eliminación de recursos.

import ( "context" "log" "user_pools_and_lambda_triggers/actions" "github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools" ) // Resources keeps track of AWS resources created during an example and handles // cleanup when the example finishes. type Resources struct { userPoolId string userAccessTokens []string triggers []actions.Trigger cognitoActor *actions.CognitoActions questioner demotools.IQuestioner } func (resources *Resources) init(cognitoActor *actions.CognitoActions, questioner demotools.IQuestioner) { resources.userAccessTokens = []string{} resources.triggers = []actions.Trigger{} resources.cognitoActor = cognitoActor resources.questioner = questioner } // Cleanup deletes all AWS resources created during an example. func (resources *Resources) Cleanup(ctx context.Context) { defer func() { if r := recover(); r != nil { log.Printf("Something went wrong during cleanup.\n%v\n", r) log.Println("Use the AWS Management Console to remove any remaining resources \n" + "that were created for this scenario.") } }() wantDelete := resources.questioner.AskBool("Do you want to remove all of the AWS resources that were created "+ "during this demo (y/n)?", "y") if wantDelete { for _, accessToken := range resources.userAccessTokens { err := resources.cognitoActor.DeleteUser(ctx, accessToken) if err != nil { log.Println("Couldn't delete user during cleanup.") panic(err) } log.Println("Deleted user.") } triggerList := make([]actions.TriggerInfo, len(resources.triggers)) for i := 0; i < len(resources.triggers); i++ { triggerList[i] = actions.TriggerInfo{Trigger: resources.triggers[i], HandlerArn: nil} } err := resources.cognitoActor.UpdateTriggers(ctx, resources.userPoolId, triggerList...) if err != nil { log.Println("Couldn't update Cognito triggers during cleanup.") panic(err) } log.Println("Removed Cognito triggers from user pool.") } else { log.Println("Be sure to remove resources when you're done with them to avoid unexpected charges!") } }