// 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 cmdimport ( "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}
// 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
}