forked from TrueCloudLab/frostfs-s3-gw
108 lines
2.3 KiB
Go
108 lines
2.3 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
|
|
//
|
|
// This file is part of MinIO Object Storage stack
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package cmd
|
|
|
|
import (
|
|
"strings"
|
|
)
|
|
|
|
func shouldEscape(c byte) bool {
|
|
if 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z' || '0' <= c && c <= '9' {
|
|
return false
|
|
}
|
|
|
|
switch c {
|
|
case '-', '_', '.', '/', '*':
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
// s3URLEncode is based on Golang's url.QueryEscape() code,
|
|
// while considering some S3 exceptions:
|
|
// - Avoid encoding '/' and '*'
|
|
// - Force encoding of '~'
|
|
func s3URLEncode(s string) string {
|
|
spaceCount, hexCount := 0, 0
|
|
for i := 0; i < len(s); i++ {
|
|
c := s[i]
|
|
if shouldEscape(c) {
|
|
if c == ' ' {
|
|
spaceCount++
|
|
} else {
|
|
hexCount++
|
|
}
|
|
}
|
|
}
|
|
|
|
if spaceCount == 0 && hexCount == 0 {
|
|
return s
|
|
}
|
|
|
|
var buf [64]byte
|
|
var t []byte
|
|
|
|
required := len(s) + 2*hexCount
|
|
if required <= len(buf) {
|
|
t = buf[:required]
|
|
} else {
|
|
t = make([]byte, required)
|
|
}
|
|
|
|
if hexCount == 0 {
|
|
copy(t, s)
|
|
for i := 0; i < len(s); i++ {
|
|
if s[i] == ' ' {
|
|
t[i] = '+'
|
|
}
|
|
}
|
|
return string(t)
|
|
}
|
|
|
|
j := 0
|
|
for i := 0; i < len(s); i++ {
|
|
switch c := s[i]; {
|
|
case c == ' ':
|
|
t[j] = '+'
|
|
j++
|
|
case shouldEscape(c):
|
|
t[j] = '%'
|
|
t[j+1] = "0123456789ABCDEF"[c>>4]
|
|
t[j+2] = "0123456789ABCDEF"[c&15]
|
|
j += 3
|
|
default:
|
|
t[j] = s[i]
|
|
j++
|
|
}
|
|
}
|
|
return string(t)
|
|
}
|
|
|
|
// s3EncodeName encodes string in response when encodingType is specified in AWS S3 requests.
|
|
func s3EncodeName(name string, encodingType string) (result string) {
|
|
// Quick path to exit
|
|
if encodingType == "" {
|
|
return name
|
|
}
|
|
encodingType = strings.ToLower(encodingType)
|
|
switch encodingType {
|
|
case "url":
|
|
return s3URLEncode(name)
|
|
}
|
|
return name
|
|
}
|