Add WithTransport

Signed-off-by: Paulo Gomes <pjbgf@linux.com>

pkg/getter/getter.go

@@ -18,6 +18,7 @@ package getter
 
 import (
 	"bytes"
+	"net/http"
 	"time"
 
 	"github.com/pkg/errors"
@@ -43,6 +44,7 @@ type options struct {
 	version               string
 	registryClient        *registry.Client
 	timeout               time.Duration
+	transport             *http.Transport
 }
 
 // Option allows specifying various settings configurable by the user for overriding the defaults
@@ -119,6 +121,12 @@ func WithUntar() Option {
 	}
 }
 
+func WithTransport(transport *http.Transport) Option {
+	return func(opts *options) {
+		opts.transport = transport
+	}
+}
+
 // Getter is an interface to support GET to the specified URL.
 type Getter interface {
 	// Get file content by url string

pkg/getter/httpgetter.go

@@ -106,10 +106,17 @@ func NewHTTPGetter(options ...Option) (Getter, error) {
 }
 
 func (g *HTTPGetter) httpClient() (*http.Client, error) {
-	transport := &http.Transport{
+	var transport *http.Transport
-		DisableCompression: true,
+
-		Proxy:              http.ProxyFromEnvironment,
+	if g.opts.transport == nil {
+		transport = &http.Transport{
+			DisableCompression: true,
+			Proxy:              http.ProxyFromEnvironment,
+		}
+	} else {
+		transport = g.opts.transport
 	}
+
 	if (g.opts.certFile != "" && g.opts.keyFile != "") || g.opts.caFile != "" {
 		tlsConf, err := tlsutil.NewClientTLS(g.opts.certFile, g.opts.keyFile, g.opts.caFile)
 		if err != nil {