mirror of https://github.com/minio/minio.git
97 lines
2.2 KiB
Go
97 lines
2.2 KiB
Go
/*
|
|
* Quick - Quick key value store for config files and persistent state files
|
|
*
|
|
* Quick (C) 2015 Minio, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package quick
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
|
|
"github.com/cheggaaa/pb"
|
|
)
|
|
|
|
const errorFmt = "%5d: %s <-- "
|
|
|
|
// FormatJSONSyntaxError generates a pretty printed json syntax error since
|
|
// golang doesn't provide an easy way to report the location of the error
|
|
func FormatJSONSyntaxError(data io.Reader, sErr *json.SyntaxError) error {
|
|
if sErr == nil {
|
|
return nil
|
|
}
|
|
|
|
var readLine bytes.Buffer
|
|
|
|
bio := bufio.NewReader(data)
|
|
errLine := int64(1)
|
|
readBytes := int64(0)
|
|
|
|
// termWidth is set to a default one to use when we are
|
|
// not able to calculate terminal width via OS syscalls
|
|
termWidth := 25
|
|
|
|
// errorShift is the length of the minimum needed place for
|
|
// error msg accessories, like <--, etc.. We calculate it
|
|
// dynamically to avoid an eventual bug after modifying errorFmt
|
|
errorShift := len(fmt.Sprintf(errorFmt, 1, ""))
|
|
|
|
if width, err := pb.GetTerminalWidth(); err == nil {
|
|
termWidth = width
|
|
}
|
|
|
|
for {
|
|
b, err := bio.ReadByte()
|
|
if err != nil {
|
|
if err != io.EOF {
|
|
return err
|
|
}
|
|
break
|
|
}
|
|
readBytes++
|
|
if readBytes > sErr.Offset {
|
|
break
|
|
}
|
|
switch b {
|
|
case '\n':
|
|
readLine.Reset()
|
|
errLine++
|
|
case '\t':
|
|
readLine.WriteByte(' ')
|
|
case '\r':
|
|
break
|
|
default:
|
|
readLine.WriteByte(b)
|
|
}
|
|
}
|
|
|
|
lineLen := readLine.Len()
|
|
idx := lineLen - termWidth + errorShift
|
|
if idx < 0 || idx > lineLen-1 {
|
|
idx = 0
|
|
}
|
|
|
|
errorStr := fmt.Sprintf("JSON syntax error at line %d, col %d : %s.\n",
|
|
errLine, readLine.Len(), sErr)
|
|
errorStr += fmt.Sprintf(errorFmt, errLine, readLine.String()[idx:])
|
|
|
|
return errors.New(errorStr)
|
|
}
|