refactor(autossl): redesign autossl feature

ext/autossl/autossl.go

@@ -3,52 +3,65 @@ package autossl
 import (
 	"crypto/tls"
 	"net/http"
-	"time"
 
 	"golang.org/x/crypto/acme/autocert"
 )
 
-// New creates and returns two HTTP servers: one for HTTP and one for HTTPS.
-// The HTTP server redirects all traffic to HTTPS using the autocert.Manager's HTTPHandler.
-// The HTTPS server uses the provided ServeMux and autocert.Manager for automatic TLS certificate management.
+// AutoSSL is a wrapper around autocert.Manager that provides automatic
+// management of SSL/TLS certificates. It embeds autocert.Manager to
+// inherit its methods and functionalities, allowing for seamless
+// integration and usage of automatic certificate management in your
+// application.
+type AutoSSL struct {
+	*autocert.Manager
+}
+
+// New creates a new AutoSSL instance with the provided options.
+// It initializes an autocert.Manager with the AcceptTOS prompt.
+// If no cache is provided in the options, it defaults to using a directory cache.
 //
 // Parameters:
 //
-//	mux - The HTTP request multiplexer to use for the HTTPS server.
 //	opts - A variadic list of Option functions to configure the autocert.Manager.
 //
 // Returns:
 //
-//	*http.Server - The HTTP server configured to redirect traffic to HTTPS.
-//	*http.Server - The HTTPS server configured with automatic TLS certificate management.
-func New(mux *http.ServeMux, opts ...Option) (*http.Server, *http.Server) {
-	cm := autocert.Manager{
+//	A pointer to an AutoSSL instance with the configured autocert.Manager.
+func New(opts ...Option) *AutoSSL {
+	cm := &autocert.Manager{
 		Prompt: autocert.AcceptTOS,
 	}
 
 	for _, opt := range opts {
-		opt(&cm)
+		opt(cm)
 	}
 
 	if cm.Cache == nil {
 		cm.Cache = autocert.DirCache(".")
 	}
 
-	httpServer := &http.Server{
-		Addr:              ":http",
-		Handler:           cm.HTTPHandler(mux),
-		ReadHeaderTimeout: 3 * time.Second,
+	return &AutoSSL{
+		Manager: cm,
 	}
+}
+
+// Configure sets up the HTTP and HTTPS servers with the necessary handlers and TLS configurations.
+// It modifies the HTTP server to use the AutoSSL manager's HTTP handler and ensures the HTTPS server
+// has a TLS configuration with at least TLS 1.2. It also sets the GetCertificate function for the
+// HTTPS server's TLS configuration to use the AutoSSL manager's GetCertificate method.
+//
+// Parameters:
+//   - httpSrv: A pointer to the HTTP server to be configured.
+//   - httpsSrv: A pointer to the HTTPS server to be configured.
+func (autossl *AutoSSL) Configure(httpSrv *http.Server, httpsSrv *http.Server) {
+	httpSrv.Handler = autossl.Manager.HTTPHandler(httpSrv.Handler)
 
-	httpsServer := &http.Server{
-		Addr:    ":https",
-		Handler: mux,
-		TLSConfig: &tls.Config{
-			MinVersion:     tls.VersionTLS12,
-			MaxVersion:     0,
-			GetCertificate: cm.GetCertificate,
-		},
+	if httpsSrv.TLSConfig == nil {
+		httpsSrv.TLSConfig = &tls.Config{
+			MinVersion: tls.VersionTLS12,
+			MaxVersion: 0,
+		}
 	}
 
-	return httpServer, httpsServer
+	httpsSrv.TLSConfig.GetCertificate = autossl.Manager.GetCertificate
 }

ext/autossl/autossl_test.go

@@ -0,0 +1,65 @@
+package autossl
+
+import (
+	"context"
+	"crypto/tls"
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"golang.org/x/crypto/acme/autocert"
+)
+
+func TestNew(t *testing.T) {
+	as := New()
+
+	require.NotNil(t, as)
+	require.NotNil(t, as.Manager)
+	require.True(t, as.Prompt(""))
+	require.NotNil(t, as.Manager.Cache)
+}
+
+func TestConfigure(t *testing.T) {
+	as := New()
+	require.NotNil(t, as)
+
+	httpSrv := &http.Server{}
+	httpsSrv := &http.Server{}
+
+	as.Configure(httpSrv, httpsSrv)
+
+	require.NotNil(t, httpSrv.Handler)
+	require.NotNil(t, httpsSrv.TLSConfig)
+
+	require.Equal(t, uint16(tls.VersionTLS12), httpsSrv.TLSConfig.MinVersion)
+	require.Equal(t, uint16(0), httpsSrv.TLSConfig.MaxVersion)
+
+	require.NotNil(t, httpsSrv.TLSConfig.GetCertificate)
+
+	httpSrv = &http.Server{}
+	httpsSrv = &http.Server{
+		TLSConfig: &tls.Config{
+			MinVersion: tls.VersionTLS10,
+			MaxVersion: tls.VersionTLS13,
+		},
+	}
+
+	as.Configure(httpSrv, httpsSrv)
+	require.NotNil(t, httpSrv.Handler)
+	require.NotNil(t, httpsSrv.TLSConfig)
+
+	require.Equal(t, uint16(tls.VersionTLS10), httpsSrv.TLSConfig.MinVersion)
+	require.Equal(t, uint16(tls.VersionTLS13), httpsSrv.TLSConfig.MaxVersion)
+
+	require.NotNil(t, httpsSrv.TLSConfig.GetCertificate)
+}
+
+func TestOptions(t *testing.T) {
+	as := New(WithCache(autocert.DirCache(".")), WithHosts("abc.com"))
+
+	require.NotNil(t, as)
+	require.IsType(t, autocert.DirCache("."), as.Manager.Cache)
+	require.Nil(t, as.Manager.HostPolicy(context.TODO(), "abc.com"))
+	require.NotNil(t, as.Manager.HostPolicy(context.TODO(), "123.com"))
+
+}