feat: move registry http calls to common client

pkg/registry/client.go

@@ -0,0 +1,40 @@
+package registry
+
+import (
+	"crypto/tls"
+	"net"
+	"net/http"
+	"time"
+)
+
+type Client struct {
+	httpClient *http.Client
+	Timeout    time.Duration
+}
+
+// NewClientWithHTTPClient returns a custom registry client useful for testing
+func NewClientWithHTTPClient(httpClient *http.Client) *Client {
+	timeout := 30 * time.Second
+	return &Client{
+		httpClient,
+		timeout,
+	}
+}
+
+// NewClient returns a registry client with the default values
+func NewClient() *Client {
+	tr := &http.Transport{
+		Proxy: http.ProxyFromEnvironment,
+		DialContext: (&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+		}).DialContext,
+		ForceAttemptHTTP2:     true,
+		MaxIdleConns:          100,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+		TLSClientConfig:       &tls.Config{InsecureSkipVerify: true},
+	}
+	return NewClientWithHTTPClient(&http.Client{Transport: tr})
+}