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config.go
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config.go
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package core
import (
"io"
"strings"
"github.com/golang/protobuf/proto"
"v2ray.com/core/common"
"v2ray.com/core/common/buf"
)
// ConfigFormat is a configurable format of V2Ray config file.
type ConfigFormat struct {
Name string
Extension []string
Loader ConfigLoader
}
// ConfigLoader is a utility to load V2Ray config from external source.
type ConfigLoader func(input io.Reader) (*Config, error)
var (
configLoaderByName = make(map[string]*ConfigFormat)
configLoaderByExt = make(map[string]*ConfigFormat)
)
// RegisterConfigLoader add a new ConfigLoader.
func RegisterConfigLoader(format *ConfigFormat) error {
name := strings.ToLower(format.Name)
if _, found := configLoaderByName[name]; found {
return newError(format.Name, " already registered.")
}
configLoaderByName[name] = format
for _, ext := range format.Extension {
lext := strings.ToLower(ext)
if f, found := configLoaderByExt[lext]; found {
return newError(ext, " already registered to ", f.Name)
}
configLoaderByExt[lext] = format
}
return nil
}
func getExtension(filename string) string {
idx := strings.LastIndexByte(filename, '.')
if idx == -1 {
return ""
}
return filename[idx+1:]
}
// LoadConfig loads config with given format from given source.
func LoadConfig(formatName string, filename string, input io.Reader) (*Config, error) {
ext := getExtension(filename)
if len(ext) > 0 {
if f, found := configLoaderByExt[ext]; found {
return f.Loader(input)
}
}
if f, found := configLoaderByName[formatName]; found {
return f.Loader(input)
}
return nil, newError("Unable to load config in ", formatName).AtWarning()
}
func loadProtobufConfig(input io.Reader) (*Config, error) {
config := new(Config)
data, err := buf.ReadAllToBytes(input)
if err != nil {
return nil, err
}
if err := proto.Unmarshal(data, config); err != nil {
return nil, err
}
return config, nil
}
func init() {
common.Must(RegisterConfigLoader(&ConfigFormat{
Name: "Protobuf",
Extension: []string{"pb"},
Loader: loadProtobufConfig,
}))
}