去掉lower

util.go

@@ -51,14 +51,13 @@ func copyAndInsensitiviseMap(m map[string]interface{}) map[string]interface{} {
 	nm := make(map[string]interface{})
 
 	for key, val := range m {
-		lkey := strings.ToLower(key)
 		switch v := val.(type) {
 		case map[interface{}]interface{}:
-			nm[lkey] = copyAndInsensitiviseMap(cast.ToStringMap(v))
+			nm[key] = copyAndInsensitiviseMap(cast.ToStringMap(v))
 		case map[string]interface{}:
-			nm[lkey] = copyAndInsensitiviseMap(v)
+			nm[key] = copyAndInsensitiviseMap(v)
 		default:
-			nm[lkey] = v
+			nm[key] = v
 		}
 	}
 
@@ -76,14 +75,8 @@ func insensitiviseMap(m map[string]interface{}) {
 			// nested map: recursively insensitivise
 			insensitiviseMap(val.(map[string]interface{}))
 		}
-
-		lower := strings.ToLower(key)
-		if key != lower {
-			// remove old key (not lower-cased)
-			delete(m, key)
-		}
 		// update map
-		m[lower] = val
+		m[key] = val
 	}
 }
 

viper.go

@@ -477,7 +477,7 @@ func (v *Viper) searchMapWithPathPrefixes(source map[string]interface{}, path []
 
 	// search for path prefixes, starting from the longest one
 	for i := len(path); i > 0; i-- {
-		prefixKey := strings.ToLower(strings.Join(path[0:i], v.keyDelim))
+		prefixKey := strings.Join(path[0:i], v.keyDelim)
 
 		next, ok := source[prefixKey]
 		if ok {
@@ -632,15 +632,14 @@ func Get(key string) interface{} { return v.Get(key) }
 //
 // Get returns an interface. For a specific value use one of the Get____ methods.
 func (v *Viper) Get(key string) interface{} {
-	lcaseKey := strings.ToLower(key)
+	val := v.find(key, true)
-	val := v.find(lcaseKey, true)
 	if val == nil {
 		return nil
 	}
 
 	if v.typeByDefValue {
 		valType := val
-		path := strings.Split(lcaseKey, v.keyDelim)
+		path := strings.Split(key, v.keyDelim)
 		defVal := v.searchMap(v.defaults, path)
 		if defVal != nil {
 			valType = defVal
@@ -1015,7 +1014,7 @@ func (v *Viper) BindFlagValue(key string, flag FlagValue) error {
 	if flag == nil {
 		return fmt.Errorf("flag for %q is nil", key)
 	}
-	v.pflags[strings.ToLower(key)] = flag
+	v.pflags[key] = flag
 	return nil
 }
 
@@ -1035,7 +1034,7 @@ func (v *Viper) BindEnv(input ...string) error {
 		return fmt.Errorf("BindEnv missing key to bind to")
 	}
 
-	key = strings.ToLower(input[0])
+	key = input[0]
 
 	if len(input) == 1 {
 		envkey = v.mergeWithEnvPrefix(key)
@@ -1232,8 +1231,7 @@ func IsSet(key string) bool { return v.IsSet(key) }
 // IsSet checks to see if the key has been set in any of the data locations.
 // IsSet is case-insensitive for a key.
 func (v *Viper) IsSet(key string) bool {
-	lcaseKey := strings.ToLower(key)
+	val := v.find(key, false)
-	val := v.find(lcaseKey, false)
 	return val != nil
 }
 
@@ -1266,11 +1264,10 @@ func RegisterAlias(alias string, key string) { v.RegisterAlias(alias, key) }
 // RegisterAlias provide another accessor for the same key.
 // This enables one to change a name without breaking the application
 func (v *Viper) RegisterAlias(alias string, key string) {
-	v.registerAlias(alias, strings.ToLower(key))
+	v.registerAlias(alias, key)
 }
 
 func (v *Viper) registerAlias(alias string, key string) {
-	alias = strings.ToLower(alias)
 	if alias != key && alias != v.realKey(key) {
 		_, exists := v.aliases[alias]
 
@@ -1332,11 +1329,11 @@ func SetDefault(key string, value interface{}) { v.SetDefault(key, value) }
 // Default only used when no value is provided by the user via flag, config or ENV.
 func (v *Viper) SetDefault(key string, value interface{}) {
 	// If alias passed in, then set the proper default
-	key = v.realKey(strings.ToLower(key))
+	key = v.realKey(key)
 	value = toCaseInsensitiveValue(value)
 
 	path := strings.Split(key, v.keyDelim)
-	lastKey := strings.ToLower(path[len(path)-1])
+	lastKey := path[len(path)-1]
 	deepestMap := deepSearch(v.defaults, path[0:len(path)-1])
 
 	// set innermost value
@@ -1355,11 +1352,11 @@ func Set(key string, value interface{}) { v.Set(key, value) }
 // flags, config file, ENV, default, or key/value store.
 func (v *Viper) Set(key string, value interface{}) {
 	// If alias passed in, then set the proper override
-	key = v.realKey(strings.ToLower(key))
+	key = v.realKey(key)
 	value = toCaseInsensitiveValue(value)
 
 	path := strings.Split(key, v.keyDelim)
-	lastKey := strings.ToLower(path[len(path)-1])
+	lastKey := path[len(path)-1]
 	deepestMap := deepSearch(v.override, path[0:len(path)-1])
 
 	// set innermost value
@@ -1556,7 +1553,7 @@ func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
 	buf := new(bytes.Buffer)
 	buf.ReadFrom(in)
 
-	switch strings.ToLower(v.getConfigType()) {
+	switch v.getConfigType() {
 
 	case "json":
 		if err := json.Unmarshal(buf.Bytes(), &c); err != nil {
@@ -1589,10 +1586,8 @@ func (v *Viper) marshalWriter(f afero.File, configType string) error {
 }
 
 func keyExists(k string, m map[string]interface{}) string {
-	lk := strings.ToLower(k)
 	for mk := range m {
-		lmk := strings.ToLower(mk)
+		if mk == k {
-		if lmk == lk {
 			return mk
 		}
 	}
@@ -1742,7 +1737,7 @@ func (v *Viper) flattenAndMergeMap(shadow map[string]bool, m map[string]interfac
 			m2 = cast.ToStringMap(val)
 		default:
 			// immediate value
-			shadow[strings.ToLower(fullKey)] = true
+			shadow[fullKey] = true
 			continue
 		}
 		// recursively merge to shadow map
@@ -1768,7 +1763,7 @@ outer:
 			}
 		}
 		// add key
-		shadow[strings.ToLower(k)] = true
+		shadow[k] = true
 	}
 	return shadow
 }
@@ -1788,7 +1783,7 @@ func (v *Viper) AllSettings() map[string]interface{} {
 			continue
 		}
 		path := strings.Split(k, v.keyDelim)
-		lastKey := strings.ToLower(path[len(path)-1])
+		lastKey := path[len(path)-1]
 		deepestMap := deepSearch(m, path[0:len(path)-1])
 		// set innermost value
 		deepestMap[lastKey] = value