return error in case of non-existent parameters in the configuration file

internal/conf/conf.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
+	"reflect"
 	"time"
 
 	"github.com/aler9/gortsplib/pkg/headers"
@@ -72,6 +73,7 @@ func loadFromFile(fpath string, conf *Conf) (bool, error) {
 				m2[k.(string)] = convert(v)
 			}
 			return m2
+
 		case []interface{}:
 			a2 := make([]interface{}, len(x))
 			for i, v := range x {
@@ -79,10 +81,59 @@ func loadFromFile(fpath string, conf *Conf) (bool, error) {
 			}
 			return a2
 		}
+
 		return i
 	}
 	temp = convert(temp)
 
+	// check for non-existent parameters
+	var checkNonExistentFields func(what interface{}, ref interface{}) error
+	checkNonExistentFields = func(what interface{}, ref interface{}) error {
+		if what == nil {
+			return nil
+		}
+
+		ma, ok := what.(map[string]interface{})
+		if !ok {
+			return fmt.Errorf("not a map")
+		}
+
+		for k, v := range ma {
+			fi := func() reflect.Type {
+				rr := reflect.TypeOf(ref)
+				for i := 0; i < rr.NumField(); i++ {
+					f := rr.Field(i)
+					if f.Tag.Get("json") == k {
+						return f.Type
+					}
+				}
+				return nil
+			}()
+			if fi == nil {
+				return fmt.Errorf("non-existent parameter: '%s'", k)
+			}
+
+			if fi == reflect.TypeOf(map[string]*PathConf{}) && v != nil {
+				ma2, ok := v.(map[string]interface{})
+				if !ok {
+					return fmt.Errorf("parameter %s is not a map", k)
+				}
+
+				for k2, v2 := range ma2 {
+					err := checkNonExistentFields(v2, reflect.Zero(fi.Elem().Elem()).Interface())
+					if err != nil {
+						return fmt.Errorf("parameter %s, key %s: %s", k, k2, err)
+					}
+				}
+			}
+		}
+		return nil
+	}
+	err = checkNonExistentFields(temp, Conf{})
+	if err != nil {
+		return true, err
+	}
+
 	// convert the generic map into JSON
 	byts, err = json.Marshal(temp)
 	if err != nil {
@@ -170,7 +221,7 @@ func Load(fpath string) (*Conf, bool, error) {
 	return conf, found, nil
 }
 
-// CheckAndFillMissing checks the configuration for errors and fills missing fields.
+// CheckAndFillMissing checks the configuration for errors and fills missing parameters.
 func (conf *Conf) CheckAndFillMissing() error {
 	if conf.LogLevel == 0 {
 		conf.LogLevel = LogLevel(logger.Info)

internal/conf/conf_test.go

@@ -29,27 +29,57 @@ func writeTempFile(byts []byte) (string, error) {
 }
 
 func TestConfFromFile(t *testing.T) {
-	tmpf, err := writeTempFile([]byte(`
-paths:
-  cam1:
-    runOnDemandStartTimeout: 5s
-`))
-	require.NoError(t, err)
-	defer os.Remove(tmpf)
+	func() {
+		tmpf, err := writeTempFile([]byte(
+			"paths:\n" +
+				"  cam1:\n" +
+				"    runOnDemandStartTimeout: 5s\n"))
+		require.NoError(t, err)
+		defer os.Remove(tmpf)
+
+		conf, hasFile, err := Load(tmpf)
+		require.NoError(t, err)
+		require.Equal(t, true, hasFile)
+
+		pa, ok := conf.Paths["cam1"]
+		require.Equal(t, true, ok)
+		require.Equal(t, &PathConf{
+			Source:                     "publisher",
+			SourceOnDemandStartTimeout: 10 * StringDuration(time.Second),
+			SourceOnDemandCloseAfter:   10 * StringDuration(time.Second),
+			RunOnDemandStartTimeout:    5 * StringDuration(time.Second),
+			RunOnDemandCloseAfter:      10 * StringDuration(time.Second),
+		}, pa)
+	}()
 
-	conf, hasFile, err := Load(tmpf)
-	require.NoError(t, err)
-	require.Equal(t, true, hasFile)
+	func() {
+		tmpf, err := writeTempFile([]byte(``))
+		require.NoError(t, err)
+		defer os.Remove(tmpf)
 
-	pa, ok := conf.Paths["cam1"]
-	require.Equal(t, true, ok)
-	require.Equal(t, &PathConf{
-		Source:                     "publisher",
-		SourceOnDemandStartTimeout: 10 * StringDuration(time.Second),
-		SourceOnDemandCloseAfter:   10 * StringDuration(time.Second),
-		RunOnDemandStartTimeout:    5 * StringDuration(time.Second),
-		RunOnDemandCloseAfter:      10 * StringDuration(time.Second),
-	}, pa)
+		_, _, err = Load(tmpf)
+		require.NoError(t, err)
+	}()
+
+	func() {
+		tmpf, err := writeTempFile([]byte(`paths:`))
+		require.NoError(t, err)
+		defer os.Remove(tmpf)
+
+		_, _, err = Load(tmpf)
+		require.NoError(t, err)
+	}()
+
+	func() {
+		tmpf, err := writeTempFile([]byte(
+			"paths:\n" +
+				"  mypath:\n"))
+		require.NoError(t, err)
+		defer os.Remove(tmpf)
+
+		_, _, err = Load(tmpf)
+		require.NoError(t, err)
+	}()
 }
 
 func TestConfFromFileAndEnv(t *testing.T) {
@@ -96,11 +126,9 @@ func TestConfFromEnvOnly(t *testing.T) {
 
 func TestConfEncryption(t *testing.T) {
 	key := "testing123testin"
-	plaintext := `
-paths:
-  path1:
-  path2:
-`
+	plaintext := "paths:\n" +
+		"  path1:\n" +
+		"  path2:\n"
 
 	encryptedConf := func() string {
 		var secretKey [32]byte
@@ -132,3 +160,25 @@ paths:
 	_, ok = conf.Paths["path2"]
 	require.Equal(t, true, ok)
 }
+
+func TestConfErrorNonExistentParameter(t *testing.T) {
+	func() {
+		tmpf, err := writeTempFile([]byte(`invalid: param`))
+		require.NoError(t, err)
+		defer os.Remove(tmpf)
+
+		_, _, err = Load(tmpf)
+		require.Equal(t, "non-existent parameter: 'invalid'", err.Error())
+	}()
+
+	func() {
+		tmpf, err := writeTempFile([]byte("paths:\n" +
+			"  mypath:\n" +
+			"    invalid: parameter\n"))
+		require.NoError(t, err)
+		defer os.Remove(tmpf)
+
+		_, _, err = Load(tmpf)
+		require.Equal(t, "parameter paths, key mypath: non-existent parameter: 'invalid'", err.Error())
+	}()
+}

internal/conf/protocol.go

@@ -21,6 +21,7 @@ type Protocols map[Protocol]struct{}
 // MarshalJSON marshals a Protocols into JSON.
 func (d Protocols) MarshalJSON() ([]byte, error) {
 	out := make([]string, len(d))
+	i := 0
 
 	for p := range d {
 		var v string
@@ -36,7 +37,8 @@ func (d Protocols) MarshalJSON() ([]byte, error) {
 			v = "tcp"
 		}
 
-		out = append(out, v)
+		out[i] = v
+		i++
 	}
 
 	return json.Marshal(out)

internal/core/api.go

@@ -39,49 +39,49 @@ func fillStruct(dest interface{}, source interface{}) {
 }
 
 func cloneStruct(dest interface{}, source interface{}) {
-	enc, _ := json.Marshal(dest)
-	_ = json.Unmarshal(enc, source)
+	enc, _ := json.Marshal(source)
+	_ = json.Unmarshal(enc, dest)
 }
 
 func loadConfData(ctx *gin.Context) (interface{}, error) {
 	var in struct {
 		// general
-		LogLevel            *string              `json:"logLevel"`
-		LogDestinations     *[]string            `json:"logDestinations"`
-		LogFile             *string              `json:"logFile"`
-		ReadTimeout         *conf.StringDuration `json:"readTimeout"`
-		WriteTimeout        *conf.StringDuration `json:"writeTimeout"`
-		ReadBufferCount     *int                 `json:"readBufferCount"`
-		API                 *bool                `json:"api"`
-		APIAddress          *string              `json:"apiAddress"`
-		Metrics             *bool                `json:"metrics"`
-		MetricsAddress      *string              `json:"metricsAddress"`
-		PPROF               *bool                `json:"pprof"`
-		PPROFAddress        *string              `json:"pprofAddress"`
-		RunOnConnect        *string              `json:"runOnConnect"`
-		RunOnConnectRestart *bool                `json:"runOnConnectRestart"`
-
-		// rtsp
-		RTSPDisable       *bool     `json:"rtspDisable"`
-		Protocols         *[]string `json:"protocols"`
-		Encryption        *string   `json:"encryption"`
-		RTSPAddress       *string   `json:"rtspAddress"`
-		RTSPSAddress      *string   `json:"rtspsAddress"`
-		RTPAddress        *string   `json:"rtpAddress"`
-		RTCPAddress       *string   `json:"rtcpAddress"`
-		MulticastIPRange  *string   `json:"multicastIPRange"`
-		MulticastRTPPort  *int      `json:"multicastRTPPort"`
-		MulticastRTCPPort *int      `json:"multicastRTCPPort"`
-		ServerKey         *string   `json:"serverKey"`
-		ServerCert        *string   `json:"serverCert"`
-		AuthMethods       *[]string `json:"authMethods"`
-		ReadBufferSize    *int      `json:"readBufferSize"`
-
-		// rtmp
+		LogLevel            *conf.LogLevel        `json:"logLevel"`
+		LogDestinations     *conf.LogDestinations `json:"logDestinations"`
+		LogFile             *string               `json:"logFile"`
+		ReadTimeout         *conf.StringDuration  `json:"readTimeout"`
+		WriteTimeout        *conf.StringDuration  `json:"writeTimeout"`
+		ReadBufferCount     *int                  `json:"readBufferCount"`
+		API                 *bool                 `json:"api"`
+		APIAddress          *string               `json:"apiAddress"`
+		Metrics             *bool                 `json:"metrics"`
+		MetricsAddress      *string               `json:"metricsAddress"`
+		PPROF               *bool                 `json:"pprof"`
+		PPROFAddress        *string               `json:"pprofAddress"`
+		RunOnConnect        *string               `json:"runOnConnect"`
+		RunOnConnectRestart *bool                 `json:"runOnConnectRestart"`
+
+		// RTSP
+		RTSPDisable       *bool             `json:"rtspDisable"`
+		Protocols         *conf.Protocols   `json:"protocols"`
+		Encryption        *conf.Encryption  `json:"encryption"`
+		RTSPAddress       *string           `json:"rtspAddress"`
+		RTSPSAddress      *string           `json:"rtspsAddress"`
+		RTPAddress        *string           `json:"rtpAddress"`
+		RTCPAddress       *string           `json:"rtcpAddress"`
+		MulticastIPRange  *string           `json:"multicastIPRange"`
+		MulticastRTPPort  *int              `json:"multicastRTPPort"`
+		MulticastRTCPPort *int              `json:"multicastRTCPPort"`
+		ServerKey         *string           `json:"serverKey"`
+		ServerCert        *string           `json:"serverCert"`
+		AuthMethods       *conf.AuthMethods `json:"authMethods"`
+		ReadBufferSize    *int              `json:"readBufferSize"`
+
+		// RTMP
 		RTMPDisable *bool   `json:"rtmpDisable"`
 		RTMPAddress *string `json:"rtmpAddress"`
 
-		// hls
+		// HLS
 		HLSDisable         *bool                `json:"hlsDisable"`
 		HLSAddress         *string              `json:"hlsAddress"`
 		HLSAlwaysRemux     *bool                `json:"hlsAlwaysRemux"`
@@ -101,7 +101,7 @@ func loadConfPathData(ctx *gin.Context) (interface{}, error) {
 	var in struct {
 		// source
 		Source                     *string              `json:"source"`
-		SourceProtocol             *string              `json:"sourceProtocol"`
+		SourceProtocol             *conf.SourceProtocol `json:"sourceProtocol"`
 		SourceAnyPortEnable        *bool                `json:"sourceAnyPortEnable"`
 		SourceFingerprint          *string              `json:"sourceFingerprint"`
 		SourceOnDemand             *bool                `json:"sourceOnDemand"`
@@ -112,12 +112,12 @@ func loadConfPathData(ctx *gin.Context) (interface{}, error) {
 		Fallback                   *string              `json:"fallback"`
 
 		// authentication
-		PublishUser *string   `json:"publishUser"`
-		PublishPass *string   `json:"publishPass"`
-		PublishIPs  *[]string `json:"publishIPs"`
-		ReadUser    *string   `json:"readUser"`
-		ReadPass    *string   `json:"readPass"`
-		ReadIPs     *[]string `json:"readIPs"`
+		PublishUser *string         `json:"publishUser"`
+		PublishPass *string         `json:"publishPass"`
+		PublishIPs  *conf.IPsOrNets `json:"publishIPs"`
+		ReadUser    *string         `json:"readUser"`
+		ReadPass    *string         `json:"readPass"`
+		ReadIPs     *conf.IPsOrNets `json:"readIPs"`
 
 		// custom commands
 		RunOnInit               *string              `json:"runOnInit"`
@@ -363,7 +363,7 @@ func (a *api) onConfigSet(ctx *gin.Context) {
 	defer a.mutex.Unlock()
 
 	var newConf conf.Conf
-	cloneStruct(a.conf, &newConf)
+	cloneStruct(&newConf, a.conf)
 	fillStruct(&newConf, in)
 
 	err = newConf.CheckAndFillMissing()
@@ -399,15 +399,16 @@ func (a *api) onConfigPathsAdd(ctx *gin.Context) {
 	defer a.mutex.Unlock()
 
 	var newConf conf.Conf
-	cloneStruct(a.conf, &newConf)
+	cloneStruct(&newConf, a.conf)
 
 	if _, ok := newConf.Paths[name]; ok {
 		ctx.AbortWithStatus(http.StatusBadRequest)
 		return
 	}
-	newConfPath := &conf.PathConf{}
 
+	newConfPath := &conf.PathConf{}
 	fillStruct(newConfPath, in)
+
 	newConf.Paths[name] = newConfPath
 
 	err = newConf.CheckAndFillMissing()
@@ -443,7 +444,7 @@ func (a *api) onConfigPathsEdit(ctx *gin.Context) {
 	defer a.mutex.Unlock()
 
 	var newConf conf.Conf
-	cloneStruct(a.conf, &newConf)
+	cloneStruct(&newConf, a.conf)
 
 	newConfPath, ok := newConf.Paths[name]
 	if !ok {
@@ -480,7 +481,7 @@ func (a *api) onConfigPathsDelete(ctx *gin.Context) {
 	defer a.mutex.Unlock()
 
 	var newConf conf.Conf
-	cloneStruct(a.conf, &newConf)
+	cloneStruct(&newConf, a.conf)
 
 	if _, ok := newConf.Paths[name]; !ok {
 		ctx.AbortWithStatus(http.StatusBadRequest)