// newClient creates, initializes and returns a new service client instance.
func newClient(cfg aws.Config, handlers request.Handlers, endpoint, signingRegion string) *STS {
svc := &STS{
Client: client.New(
cfg,
metadata.ClientInfo{
ServiceName: ServiceName,
SigningRegion: signingRegion,
Endpoint: endpoint,
APIVersion: "2011-06-15",
},
handlers,
),
}
// Handlers
svc.Handlers.Sign.PushBack(v4.Sign)
svc.Handlers.Build.PushBack(query.Build)
svc.Handlers.Unmarshal.PushBack(query.Unmarshal)
svc.Handlers.UnmarshalMeta.PushBack(query.UnmarshalMeta)
svc.Handlers.UnmarshalError.PushBack(query.UnmarshalError)
// Run custom client initialization if present
if initClient != nil {
initClient(svc.Client)
}
return svc
}
// 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
}
