示例#1
0
// NewClient returns a new EC2Metadata client. Should be used to create
// a client when not using a session. Generally using just New with a session
// is preferred.
func NewClient(cfg aws.Config, handlers request.Handlers, endpoint, signingRegion string, opts ...func(*client.Client)) *EC2Metadata {
	// If the default http client is provided, replace it with a custom
	// client using default timeouts.
	if cfg.HTTPClient == http.DefaultClient {
		cfg.HTTPClient = &http.Client{
			Transport: &http.Transport{
				Proxy: http.ProxyFromEnvironment,
				Dial: (&net.Dialer{
					// use a shorter timeout than default because the metadata
					// service is local if it is running, and to fail faster
					// if not running on an ec2 instance.
					Timeout:   5 * time.Second,
					KeepAlive: 30 * time.Second,
				}).Dial,
				TLSHandshakeTimeout: 10 * time.Second,
			},
		}
	}

	svc := &EC2Metadata{
		Client: client.New(
			cfg,
			metadata.ClientInfo{
				ServiceName: ServiceName,
				Endpoint:    endpoint,
				APIVersion:  "latest",
			},
			handlers,
		),
	}

	svc.Handlers.Unmarshal.PushBack(unmarshalHandler)
	svc.Handlers.UnmarshalError.PushBack(unmarshalError)
	svc.Handlers.Validate.Clear()
	svc.Handlers.Validate.PushBack(validateEndpointHandler)

	// Add additional options to the service config
	for _, option := range opts {
		option(svc.Client)
	}

	return svc
}
示例#2
0
// WithRetryer sets a config Retryer value to the given Config returning it
// for chaining.
func WithRetryer(cfg *aws.Config, retryer Retryer) *aws.Config {
	cfg.Retryer = retryer
	return cfg
}