func ExampleApplicationAutoScaling_DescribeScalableTargets() {
	svc := applicationautoscaling.New(session.New())

	params := &applicationautoscaling.DescribeScalableTargetsInput{
		ServiceNamespace: aws.String("ServiceNamespace"), // Required
		MaxResults:       aws.Int64(1),
		NextToken:        aws.String("XmlString"),
		ResourceIds: []*string{
			aws.String("ResourceIdMaxLen1600"), // Required
			// More values...
		},
		ScalableDimension: aws.String("ScalableDimension"),
	}
	resp, err := svc.DescribeScalableTargets(params)

	if err != nil {
		// Print the error, cast err to awserr.Error to get the Code and
		// Message from an error.
		fmt.Println(err.Error())
		return
	}

	// Pretty-print the response data.
	fmt.Println(resp)
}

func ExampleApplicationAutoScaling_DeregisterScalableTarget() {
	sess, err := session.NewSession()
	if err != nil {
		fmt.Println("failed to create session,", err)
		return
	}

	svc := applicationautoscaling.New(sess)

	params := &applicationautoscaling.DeregisterScalableTargetInput{
		ResourceId:        aws.String("ResourceIdMaxLen1600"), // Required
		ScalableDimension: aws.String("ScalableDimension"),    // Required
		ServiceNamespace:  aws.String("ServiceNamespace"),     // Required
	}
	resp, err := svc.DeregisterScalableTarget(params)

	if err != nil {
		// Print the error, cast err to awserr.Error to get the Code and
		// Message from an error.
		fmt.Println(err.Error())
		return
	}

	// Pretty-print the response data.
	fmt.Println(resp)
}

func ExampleApplicationAutoScaling_DescribeScalingActivities() {
	sess, err := session.NewSession()
	if err != nil {
		fmt.Println("failed to create session,", err)
		return
	}

	svc := applicationautoscaling.New(sess)

	params := &applicationautoscaling.DescribeScalingActivitiesInput{
		ServiceNamespace:  aws.String("ServiceNamespace"), // Required
		MaxResults:        aws.Int64(1),
		NextToken:         aws.String("XmlString"),
		ResourceId:        aws.String("ResourceIdMaxLen1600"),
		ScalableDimension: aws.String("ScalableDimension"),
	}
	resp, err := svc.DescribeScalingActivities(params)

	if err != nil {
		// Print the error, cast err to awserr.Error to get the Code and
		// Message from an error.
		fmt.Println(err.Error())
		return
	}

	// Pretty-print the response data.
	fmt.Println(resp)
}

func ExampleApplicationAutoScaling_PutScalingPolicy() {
	sess, err := session.NewSession()
	if err != nil {
		fmt.Println("failed to create session,", err)
		return
	}

	svc := applicationautoscaling.New(sess)

	params := &applicationautoscaling.PutScalingPolicyInput{
		PolicyName:        aws.String("PolicyName"),           // Required
		ResourceId:        aws.String("ResourceIdMaxLen1600"), // Required
		ScalableDimension: aws.String("ScalableDimension"),    // Required
		ServiceNamespace:  aws.String("ServiceNamespace"),     // Required
		PolicyType:        aws.String("PolicyType"),
		StepScalingPolicyConfiguration: &applicationautoscaling.StepScalingPolicyConfiguration{
			AdjustmentType:         aws.String("AdjustmentType"),
			Cooldown:               aws.Int64(1),
			MetricAggregationType:  aws.String("MetricAggregationType"),
			MinAdjustmentMagnitude: aws.Int64(1),
			StepAdjustments: []*applicationautoscaling.StepAdjustment{
				{ // Required
					ScalingAdjustment:        aws.Int64(1), // Required
					MetricIntervalLowerBound: aws.Float64(1.0),
					MetricIntervalUpperBound: aws.Float64(1.0),
				},
				// More values...
			},
		},
	}
	resp, err := svc.PutScalingPolicy(params)

	if err != nil {
		// Print the error, cast err to awserr.Error to get the Code and
		// Message from an error.
		fmt.Println(err.Error())
		return
	}

	// Pretty-print the response data.
	fmt.Println(resp)
}

func ExampleApplicationAutoScaling_DeleteScalingPolicy() {
	svc := applicationautoscaling.New(session.New())

	params := &applicationautoscaling.DeleteScalingPolicyInput{
		PolicyName:        aws.String("ResourceIdMaxLen1600"), // Required
		ResourceId:        aws.String("ResourceIdMaxLen1600"), // Required
		ScalableDimension: aws.String("ScalableDimension"),    // Required
		ServiceNamespace:  aws.String("ServiceNamespace"),     // Required
	}
	resp, err := svc.DeleteScalingPolicy(params)

	if err != nil {
		// Print the error, cast err to awserr.Error to get the Code and
		// Message from an error.
		fmt.Println(err.Error())
		return
	}

	// Pretty-print the response data.
	fmt.Println(resp)
}

func ExampleApplicationAutoScaling_RegisterScalableTarget() {
	svc := applicationautoscaling.New(session.New())

	params := &applicationautoscaling.RegisterScalableTargetInput{
		ResourceId:        aws.String("ResourceIdMaxLen1600"), // Required
		ScalableDimension: aws.String("ScalableDimension"),    // Required
		ServiceNamespace:  aws.String("ServiceNamespace"),     // Required
		MaxCapacity:       aws.Int64(1),
		MinCapacity:       aws.Int64(1),
		RoleARN:           aws.String("ResourceIdMaxLen1600"),
	}
	resp, err := svc.RegisterScalableTarget(params)

	if err != nil {
		// Print the error, cast err to awserr.Error to get the Code and
		// Message from an error.
		fmt.Println(err.Error())
		return
	}

	// Pretty-print the response data.
	fmt.Println(resp)
}

// Client configures and returns a fully initialized AWSClient
func (c *Config) Client() (interface{}, error) {
	// Get the auth and region. This can fail if keys/regions were not
	// specified and we're attempting to use the environment.
	log.Println("[INFO] Building AWS region structure")
	err := c.ValidateRegion()
	if err != nil {
		return nil, err
	}

	var client AWSClient
	// store AWS region in client struct, for region specific operations such as
	// bucket storage in S3
	client.region = c.Region

	log.Println("[INFO] Building AWS auth structure")
	creds, err := GetCredentials(c)
	if err != nil {
		return nil, err
	}
	// Call Get to check for credential provider. If nothing found, we'll get an
	// error, and we can present it nicely to the user
	cp, err := creds.Get()
	if err != nil {
		if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == "NoCredentialProviders" {
			return nil, errors.New(`No valid credential sources found for AWS Provider.
  Please see https://terraform.io/docs/providers/aws/index.html for more information on
  providing credentials for the AWS Provider`)
		}

		return nil, fmt.Errorf("Error loading credentials for AWS Provider: %s", err)
	}

	log.Printf("[INFO] AWS Auth provider used: %q", cp.ProviderName)

	awsConfig := &aws.Config{
		Credentials:      creds,
		Region:           aws.String(c.Region),
		MaxRetries:       aws.Int(c.MaxRetries),
		HTTPClient:       cleanhttp.DefaultClient(),
		S3ForcePathStyle: aws.Bool(c.S3ForcePathStyle),
	}

	if logging.IsDebugOrHigher() {
		awsConfig.LogLevel = aws.LogLevel(aws.LogDebugWithHTTPBody)
		awsConfig.Logger = awsLogger{}
	}

	if c.Insecure {
		transport := awsConfig.HTTPClient.Transport.(*http.Transport)
		transport.TLSClientConfig = &tls.Config{
			InsecureSkipVerify: true,
		}
	}

	// Set up base session
	sess, err := session.NewSession(awsConfig)
	if err != nil {
		return nil, errwrap.Wrapf("Error creating AWS session: {{err}}", err)
	}

	// Removes the SDK Version handler, so we only have the provider User-Agent
	// Ex: "User-Agent: APN/1.0 HashiCorp/1.0 Terraform/0.7.9-dev"
	sess.Handlers.Build.Remove(request.NamedHandler{Name: "core.SDKVersionUserAgentHandler"})
	sess.Handlers.Build.PushFrontNamed(addTerraformVersionToUserAgent)

	if extraDebug := os.Getenv("TERRAFORM_AWS_AUTHFAILURE_DEBUG"); extraDebug != "" {
		sess.Handlers.UnmarshalError.PushFrontNamed(debugAuthFailure)
	}

	// Some services exist only in us-east-1, e.g. because they manage
	// resources that can span across multiple regions, or because
	// signature format v4 requires region to be us-east-1 for global
	// endpoints:
	// http://docs.aws.amazon.com/general/latest/gr/sigv4_changes.html
	usEast1Sess := sess.Copy(&aws.Config{Region: aws.String("us-east-1")})

	// Some services have user-configurable endpoints
	awsEc2Sess := sess.Copy(&aws.Config{Endpoint: aws.String(c.Ec2Endpoint)})
	awsElbSess := sess.Copy(&aws.Config{Endpoint: aws.String(c.ElbEndpoint)})
	awsIamSess := sess.Copy(&aws.Config{Endpoint: aws.String(c.IamEndpoint)})
	awsS3Sess := sess.Copy(&aws.Config{Endpoint: aws.String(c.S3Endpoint)})
	dynamoSess := sess.Copy(&aws.Config{Endpoint: aws.String(c.DynamoDBEndpoint)})
	kinesisSess := sess.Copy(&aws.Config{Endpoint: aws.String(c.KinesisEndpoint)})

	// These two services need to be set up early so we can check on AccountID
	client.iamconn = iam.New(awsIamSess)
	client.stsconn = sts.New(sess)

	if !c.SkipCredsValidation {
		err = c.ValidateCredentials(client.stsconn)
		if err != nil {
			return nil, err
		}
	}

	if !c.SkipRequestingAccountId {
		partition, accountId, err := GetAccountInfo(client.iamconn, client.stsconn, cp.ProviderName)
		if err == nil {
			client.partition = partition
//.........这里部分代码省略.........

// Client configures and returns a fully initialized AWSClient
func (c *Config) Client() (interface{}, error) {
	// Get the auth and region. This can fail if keys/regions were not
	// specified and we're attempting to use the environment.
	var errs []error

	log.Println("[INFO] Building AWS region structure")
	err := c.ValidateRegion()
	if err != nil {
		errs = append(errs, err)
	}

	var client AWSClient
	if len(errs) == 0 {
		// store AWS region in client struct, for region specific operations such as
		// bucket storage in S3
		client.region = c.Region

		log.Println("[INFO] Building AWS auth structure")
		creds := GetCredentials(c.AccessKey, c.SecretKey, c.Token, c.Profile, c.CredsFilename)
		// Call Get to check for credential provider. If nothing found, we'll get an
		// error, and we can present it nicely to the user
		cp, err := creds.Get()
		if err != nil {
			if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == "NoCredentialProviders" {
				errs = append(errs, fmt.Errorf(`No valid credential sources found for AWS Provider.
  Please see https://terraform.io/docs/providers/aws/index.html for more information on
  providing credentials for the AWS Provider`))
			} else {
				errs = append(errs, fmt.Errorf("Error loading credentials for AWS Provider: %s", err))
			}
			return nil, &multierror.Error{Errors: errs}
		}

		log.Printf("[INFO] AWS Auth provider used: %q", cp.ProviderName)

		awsConfig := &aws.Config{
			Credentials: creds,
			Region:      aws.String(c.Region),
			MaxRetries:  aws.Int(c.MaxRetries),
			HTTPClient:  cleanhttp.DefaultClient(),
		}

		if logging.IsDebugOrHigher() {
			awsConfig.LogLevel = aws.LogLevel(aws.LogDebugWithHTTPBody)
			awsConfig.Logger = awsLogger{}
		}

		if c.Insecure {
			transport := awsConfig.HTTPClient.Transport.(*http.Transport)
			transport.TLSClientConfig = &tls.Config{
				InsecureSkipVerify: true,
			}
		}

		// Set up base session
		sess := session.New(awsConfig)
		sess.Handlers.Build.PushFrontNamed(addTerraformVersionToUserAgent)

		// Some services exist only in us-east-1, e.g. because they manage
		// resources that can span across multiple regions, or because
		// signature format v4 requires region to be us-east-1 for global
		// endpoints:
		// http://docs.aws.amazon.com/general/latest/gr/sigv4_changes.html
		usEast1Sess := sess.Copy(&aws.Config{Region: aws.String("us-east-1")})

		// Some services have user-configurable endpoints
		awsEc2Sess := sess.Copy(&aws.Config{Endpoint: aws.String(c.Ec2Endpoint)})
		awsElbSess := sess.Copy(&aws.Config{Endpoint: aws.String(c.ElbEndpoint)})
		awsIamSess := sess.Copy(&aws.Config{Endpoint: aws.String(c.IamEndpoint)})
		dynamoSess := sess.Copy(&aws.Config{Endpoint: aws.String(c.DynamoDBEndpoint)})
		kinesisSess := sess.Copy(&aws.Config{Endpoint: aws.String(c.KinesisEndpoint)})

		// These two services need to be set up early so we can check on AccountID
		client.iamconn = iam.New(awsIamSess)
		client.stsconn = sts.New(sess)

		err = c.ValidateCredentials(client.stsconn)
		if err != nil {
			errs = append(errs, err)
			return nil, &multierror.Error{Errors: errs}
		}
		accountId, err := GetAccountId(client.iamconn, client.stsconn, cp.ProviderName)
		if err == nil {
			client.accountid = accountId
		}

		authErr := c.ValidateAccountId(client.accountid)
		if authErr != nil {
			errs = append(errs, authErr)
		}

		client.apigateway = apigateway.New(sess)
		client.appautoscalingconn = applicationautoscaling.New(sess)
		client.autoscalingconn = autoscaling.New(sess)
		client.cfconn = cloudformation.New(sess)
		client.cloudfrontconn = cloudfront.New(sess)
		client.cloudtrailconn = cloudtrail.New(sess)
		client.cloudwatchconn = cloudwatch.New(sess)
		client.cloudwatcheventsconn = cloudwatchevents.New(sess)
//.........这里部分代码省略.........