add tls connect options

.gitignore

@@ -14,4 +14,5 @@
 # Dependency directories (remove the comment below to include it)
 # vendor/
 
-.idea
+.idea
+*.pem

base64.go

@@ -0,0 +1,12 @@
+package mongodb
+
+import "encoding/base64"
+
+func base64DecodeToBytes(text string) []byte {
+	s, _ := base64.StdEncoding.DecodeString(text)
+	return s
+}
+
+func base64DecodeToString(text string) string {
+	return string(base64DecodeToBytes(text))
+}

mongodb.go

@@ -10,27 +10,81 @@ import (
 	"go.mongodb.org/mongo-driver/mongo/readpref"
 )
 
+// Config ...
+type Config struct {
+	Host   string
+	DBName string
+
+	TLS        *ConnectTLSOpts
+	Standalone *ConnectStandaloneOpts
+}
+
 // ConnectTLSOpts ...
 type ConnectTLSOpts struct {
-	Host                       string
-	DBName                     string
-	ReplSet                    string
-	CaFilePath                 string
-	CertificateKeyFilePath     string
-	CertificateKeyFilePassword string
+	ReplSet             string
+	CaFile              string
+	CertKeyFile         string
+	CertKeyFilePassword string
+}
+
+// ConnectStandaloneOpts ...
+type ConnectStandaloneOpts struct {
+	AuthMechanism string
+	AuthSource    string
+	Username      string
+	Password      string
 }
 
 var db *mongo.Database
 
-// ConnectWithTLS ...
-func ConnectWithTLS(opts ConnectTLSOpts) (*mongo.Database, error) {
-	ctx := context.Background()
-	uri := fmt.Sprintf("%s/?tls=true&tlsCAFile=%s&tlsCertificateKeyFile=%s&tlsCertificateKeyFilePassword=%s", opts.Host, opts.CaFilePath, opts.CertificateKeyFilePath, opts.CertificateKeyFilePassword)
-	readPref := readpref.SecondaryPreferred()
-	credential := options.Credential{
-		AuthMechanism: "MONGODB-X509",
+// Connect to mongo server
+func Connect(cfg Config) (*mongo.Database, error) {
+	if cfg.TLS != nil && cfg.TLS.ReplSet != "" {
+		return connectWithTLS(cfg)
 	}
-	clientOpts := options.Client().SetAuth(credential).SetReadPreference(readPref).SetReplicaSet(opts.ReplSet).ApplyURI(uri)
+	connectOptions := options.ClientOptions{}
+	opts := cfg.Standalone
+	// Set auth if existed
+	if opts.Username != "" && opts.Password != "" {
+		connectOptions.Auth = &options.Credential{
+			AuthMechanism: opts.AuthMechanism,
+			AuthSource:    opts.AuthSource,
+			Username:      opts.Username,
+			Password:      opts.Password,
+		}
+	}
+
+	// Connect
+	client, err := mongo.Connect(context.Background(), connectOptions.ApplyURI(cfg.Host))
+	if err != nil {
+		fmt.Println("Error when connect to MongoDB database", cfg.Host, err)
+		return nil, err
+	}
+
+	fmt.Println(aurora.Green("*** CONNECTED TO MONGODB: " + cfg.Host + " --- DB: " + cfg.DBName))
+
+	// Set data
+	db = client.Database(cfg.DBName)
+	return db, nil
+}
+
+func connectWithTLS(cfg Config) (*mongo.Database, error) {
+	ctx := context.Background()
+	opts := cfg.TLS
+
+	caFile, err := initFileFromBase64String("ca.pem", opts.CaFile)
+	if err != nil {
+		return nil, err
+	}
+	certFile, err := initFileFromBase64String("cert.pem", opts.CertKeyFile)
+	if err != nil {
+		return nil, err
+	}
+	pwd := base64DecodeToString(opts.CertKeyFilePassword)
+	s := "%s/?tls=true&tlsCAFile=./%s&tlsCertificateKeyFile=./%s&tlsCertificateKeyFilePassword=%s&authMechanism=MONGODB-X509"
+	uri := fmt.Sprintf(s, cfg.Host, caFile.Name(), certFile.Name(), pwd)
+	readPref := readpref.SecondaryPreferred()
+	clientOpts := options.Client().SetReadPreference(readPref).SetReplicaSet(opts.ReplSet).ApplyURI(uri)
 	client, err := mongo.Connect(ctx, clientOpts)
 	if err != nil {
 		return nil, err
@@ -38,37 +92,12 @@ func ConnectWithTLS(opts ConnectTLSOpts) (*mongo.Database, error) {
 	if err := client.Ping(ctx, readpref.SecondaryPreferred()); err != nil {
 		return nil, err
 	}
-	db = client.Database(opts.DBName)
+	db = client.Database(cfg.DBName)
+
+	fmt.Println(aurora.Green("*** CONNECTED TO MONGODB: " + cfg.Host + " --- DB: " + cfg.DBName))
 	return db, err
 }
 
-// Connect to mongo server
-func Connect(host, user, password, dbName, mechanism, source string) (*mongo.Database, error) {
-	connectOptions := options.ClientOptions{}
-	// Set auth if existed
-	if user != "" && password != "" {
-		connectOptions.Auth = &options.Credential{
-			AuthMechanism: mechanism,
-			AuthSource:    source,
-			Username:      user,
-			Password:      password,
-		}
-	}
-
-	// Connect
-	client, err := mongo.Connect(context.Background(), connectOptions.ApplyURI(host))
-	if err != nil {
-		fmt.Println("Error when connect to MongoDB database", host, err)
-		return nil, err
-	}
-
-	fmt.Println(aurora.Green("*** CONNECTED TO MONGODB: " + host + " --- DB: " + dbName))
-
-	// Set data
-	db = client.Database(dbName)
-	return db, nil
-}
-
 // GetInstance ...
 func GetInstance() *mongo.Database {
 	return db

util.go

@@ -0,0 +1,21 @@
+package mongodb
+
+import (
+	"fmt"
+	"os"
+)
+
+func initFileFromBase64String(filename, value string) (*os.File, error) {
+	f, err := os.Create(filename)
+	if err != nil {
+		fmt.Println("mongodb.initFileFromBase64String - err: ", err)
+		return nil, err
+	}
+	b := base64DecodeToBytes(value)
+	if _, err := f.Write(b); err != nil {
+		fmt.Println("mongodb.initFileFromBase64String - write file err: ", err)
+		return nil, err
+	}
+	f.Sync()
+	return f, nil
+}