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loader.go
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/
loader.go
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package serial
import (
"bytes"
"encoding/json"
"io"
core "github.com/v2fly/v2ray-core/v5"
"github.com/v2fly/v2ray-core/v5/common/errors"
json_reader "github.com/v2fly/v2ray-core/v5/infra/conf/json"
v4 "github.com/v2fly/v2ray-core/v5/infra/conf/v4"
)
type offset struct {
line int
char int
}
func findOffset(b []byte, o int) *offset {
if o >= len(b) || o < 0 {
return nil
}
line := 1
char := 0
for i, x := range b {
if i == o {
break
}
if x == '\n' {
line++
char = 0
} else {
char++
}
}
return &offset{line: line, char: char}
}
// DecodeJSONConfig reads from reader and decode the config into *conf.Config
// syntax error could be detected.
func DecodeJSONConfig(reader io.Reader) (*v4.Config, error) {
jsonConfig := &v4.Config{}
err := DecodeJSON(reader, jsonConfig)
if err != nil {
return nil, err
}
return jsonConfig, nil
}
// DecodeJSON reads from reader and decode into target
// syntax error could be detected.
func DecodeJSON(reader io.Reader, target interface{}) error {
jsonContent := bytes.NewBuffer(make([]byte, 0, 10240))
jsonReader := io.TeeReader(&json_reader.Reader{
Reader: reader,
}, jsonContent)
decoder := json.NewDecoder(jsonReader)
if err := decoder.Decode(target); err != nil {
var pos *offset
cause := errors.Cause(err)
switch tErr := cause.(type) {
case *json.SyntaxError:
pos = findOffset(jsonContent.Bytes(), int(tErr.Offset))
case *json.UnmarshalTypeError:
pos = findOffset(jsonContent.Bytes(), int(tErr.Offset))
}
if pos != nil {
return newError("failed to read config file at line ", pos.line, " char ", pos.char).Base(err)
}
return newError("failed to read config file").Base(err)
}
return nil
}
func LoadJSONConfig(reader io.Reader) (*core.Config, error) {
jsonConfig, err := DecodeJSONConfig(reader)
if err != nil {
return nil, err
}
pbConfig, err := jsonConfig.Build()
if err != nil {
return nil, newError("failed to parse json config").Base(err)
}
return pbConfig, nil
}