kubernetes/staging/src/k8s.io/client-go/rest/transport.go

// HTTPClientFor returns an http.Client that will provide the authentication
// or transport level security defined by the provided Config. Will return the
// default http.DefaultClient if no special case behavior is needed.
func HTTPClientFor(config *Config) (*http.Client, error) { … }

// TLSConfigFor returns a tls.Config that will provide the transport level security defined
// by the provided Config. Will return nil if no transport level security is requested.
func TLSConfigFor(config *Config) (*tls.Config, error) { … }

// TransportFor returns an http.RoundTripper that will provide the authentication
// or transport level security defined by the provided Config. Will return the
// default http.DefaultTransport if no special case behavior is needed.
func TransportFor(config *Config) (http.RoundTripper, error) { … }

// HTTPWrappersForConfig wraps a round tripper with any relevant layered behavior from the
// config. Exposed to allow more clients that need HTTP-like behavior but then must hijack
// the underlying connection (like WebSocket or HTTP2 clients). Pure HTTP clients should use
// the higher level TransportFor or RESTClientFor methods.
func HTTPWrappersForConfig(config *Config, rt http.RoundTripper) (http.RoundTripper, error) { … }

// TransportConfig converts a client config to an appropriate transport config.
func (c *Config) TransportConfig() (*transport.Config, error) { … }

// Wrap adds a transport middleware function that will give the caller
// an opportunity to wrap the underlying http.RoundTripper prior to the
// first API call being made. The provided function is invoked after any
// existing transport wrappers are invoked.
func (c *Config) Wrap(fn transport.WrapperFunc) { … }