address comment

Signed-off-by: lance6716 <[email protected]>

README.md

@@ -158,15 +158,15 @@ Default:        false
 `allowCleartextPasswords=true` allows using the [cleartext client side plugin](https://dev.mysql.com/doc/en/cleartext-pluggable-authentication.html) if required by an account, such as one defined with the [PAM authentication plugin](http://dev.mysql.com/doc/en/pam-authentication-plugin.html). Sending passwords in clear text may be a security problem in some configurations. To avoid problems if there is any possibility that the password would be intercepted, clients should connect to MySQL Server using a method that protects the password. Possibilities include [TLS / SSL](#tls), IPsec, or a private network.
 
 
-##### `allowFallbackToNoTLS`
+##### `allowFallbackToPlaintext`
 
 ```
 Type:           bool
 Valid Values:   true, false
 Default:        false
 ```
 
-`allowFallbackToNoTLS=true` acts like a `--ssl-mode=PREFERRED` MySQL client as described in [Command Options for Connecting to the Server](https://dev.mysql.com/doc/refman/5.7/en/connection-options.html#option_general_ssl-mode)
+`allowFallbackToPlaintext=true` acts like a `--ssl-mode=PREFERRED` MySQL client as described in [Command Options for Connecting to the Server](https://dev.mysql.com/doc/refman/5.7/en/connection-options.html#option_general_ssl-mode)
 
 ##### `allowNativePasswords`
 

dsn.go

@@ -51,18 +51,18 @@ type Config struct {
 	ReadTimeout      time.Duration     // I/O read timeout
 	WriteTimeout     time.Duration     // I/O write timeout
 
-	AllowAllFiles           bool // Allow all files to be used with LOAD DATA LOCAL INFILE
-	AllowCleartextPasswords bool // Allows the cleartext client side plugin
-	AllowFallbackToNoTLS    bool // Allows fallback to unencrypted connection if server does not support TLS
-	AllowNativePasswords    bool // Allows the native password authentication method
-	AllowOldPasswords       bool // Allows the old insecure password method
-	CheckConnLiveness       bool // Check connections for liveness before using them
-	ClientFoundRows         bool // Return number of matching rows instead of rows changed
-	ColumnsWithAlias        bool // Prepend table alias to column names
-	InterpolateParams       bool // Interpolate placeholders into query string
-	MultiStatements         bool // Allow multiple statements in one query
-	ParseTime               bool // Parse time values to time.Time
-	RejectReadOnly          bool // Reject read-only connections
+	AllowAllFiles            bool // Allow all files to be used with LOAD DATA LOCAL INFILE
+	AllowCleartextPasswords  bool // Allows the cleartext client side plugin
+	AllowFallbackToPlaintext bool // Allows fallback to unencrypted connection if server does not support TLS
+	AllowNativePasswords     bool // Allows the native password authentication method
+	AllowOldPasswords        bool // Allows the old insecure password method
+	CheckConnLiveness        bool // Check connections for liveness before using them
+	ClientFoundRows          bool // Return number of matching rows instead of rows changed
+	ColumnsWithAlias         bool // Prepend table alias to column names
+	InterpolateParams        bool // Interpolate placeholders into query string
+	MultiStatements          bool // Allow multiple statements in one query
+	ParseTime                bool // Parse time values to time.Time
+	RejectReadOnly           bool // Reject read-only connections
 }
 
 // NewConfig creates a new Config and sets default values.
@@ -130,7 +130,7 @@ func (cfg *Config) normalize() error {
 			cfg.TLS = &tls.Config{InsecureSkipVerify: true}
 		case "preferred":
 			cfg.TLS = &tls.Config{InsecureSkipVerify: true}
-			cfg.AllowFallbackToNoTLS = true
+			cfg.AllowFallbackToPlaintext = true
 		default:
 			cfg.TLS = getTLSConfigClone(cfg.TLSConfig)
 			if cfg.TLS == nil {
@@ -210,8 +210,8 @@ func (cfg *Config) FormatDSN() string {
 		writeDSNParam(&buf, &hasParam, "allowCleartextPasswords", "true")
 	}
 
-	if cfg.AllowFallbackToNoTLS {
-		writeDSNParam(&buf, &hasParam, "allowFallbackToNoTLS", "true")
+	if cfg.AllowFallbackToPlaintext {
+		writeDSNParam(&buf, &hasParam, "allowFallbackToPlaintext", "true")
 	}
 
 	if !cfg.AllowNativePasswords {
@@ -402,9 +402,9 @@ func parseDSNParams(cfg *Config, params string) (err error) {
 			}
 
 		// Allow fallback to unencrypted connection if server does not support TLS
-		case "allowFallbackToNoTLS":
+		case "allowFallbackToPlaintext":
 			var isBool bool
-			cfg.AllowFallbackToNoTLS, isBool = readBool(value)
+			cfg.AllowFallbackToPlaintext, isBool = readBool(value)
 			if !isBool {
 				return errors.New("invalid bool value: " + value)
 			}

dsn_test.go

@@ -42,8 +42,8 @@ var testDSNs = []struct {
 	"user:password@/dbname?loc=UTC&timeout=30s&readTimeout=1s&writeTimeout=1s&allowAllFiles=1&clientFoundRows=true&allowOldPasswords=TRUE&collation=utf8mb4_unicode_ci&maxAllowedPacket=16777216&tls=false&allowCleartextPasswords=true&parseTime=true&rejectReadOnly=true",
 	&Config{User: "user", Passwd: "password", Net: "tcp", Addr: "127.0.0.1:3306", DBName: "dbname", Collation: "utf8mb4_unicode_ci", Loc: time.UTC, TLSConfig: "false", AllowCleartextPasswords: true, AllowNativePasswords: true, Timeout: 30 * time.Second, ReadTimeout: time.Second, WriteTimeout: time.Second, AllowAllFiles: true, AllowOldPasswords: true, CheckConnLiveness: true, ClientFoundRows: true, MaxAllowedPacket: 16777216, ParseTime: true, RejectReadOnly: true},
 }, {
-	"user:password@/dbname?allowNativePasswords=false&checkConnLiveness=false&maxAllowedPacket=0&allowFallbackToNoTLS=true",
-	&Config{User: "user", Passwd: "password", Net: "tcp", Addr: "127.0.0.1:3306", DBName: "dbname", Collation: "utf8mb4_general_ci", Loc: time.UTC, MaxAllowedPacket: 0, AllowFallbackToNoTLS: true, AllowNativePasswords: false, CheckConnLiveness: false},
+	"user:password@/dbname?allowNativePasswords=false&checkConnLiveness=false&maxAllowedPacket=0&allowFallbackToPlaintext=true",
+	&Config{User: "user", Passwd: "password", Net: "tcp", Addr: "127.0.0.1:3306", DBName: "dbname", Collation: "utf8mb4_general_ci", Loc: time.UTC, MaxAllowedPacket: 0, AllowFallbackToPlaintext: true, AllowNativePasswords: false, CheckConnLiveness: false},
 }, {
 	"user:p@ss(word)@tcp([de:ad:be:ef::ca:fe]:80)/dbname?loc=Local",
 	&Config{User: "user", Passwd: "p@ss(word)", Net: "tcp", Addr: "[de:ad:be:ef::ca:fe]:80", DBName: "dbname", Collation: "utf8mb4_general_ci", Loc: time.Local, MaxAllowedPacket: defaultMaxAllowedPacket, AllowNativePasswords: true, CheckConnLiveness: true},
@@ -100,6 +100,7 @@ func TestDSNParserInvalid(t *testing.T) {
 		"User:pass@tcp(1.2.3.4:3306)",           // no trailing slash
 		"net()/",                                // unknown default addr
 		"user:pass@tcp(127.0.0.1:3306)/db/name", // invalid dbname
+		"user:password@/dbname?allowFallbackToPlaintext=PREFERRED", // wrong bool flag
 		//"/dbname?arg=/some/unescaped/path",
 	}
 

packets.go

@@ -223,7 +223,7 @@ func (mc *mysqlConn) readHandshakePacket() (data []byte, plugin string, err erro
 		return nil, "", ErrOldProtocol
 	}
 	if mc.flags&clientSSL == 0 && mc.cfg.TLS != nil {
-		if mc.cfg.AllowFallbackToNoTLS {
+		if mc.cfg.AllowFallbackToPlaintext {
 			mc.cfg.TLS = nil
 		} else {
 			return nil, "", ErrNoTLS