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api/bucketPolicy: Use minio-go/pkg/set and fix bucket policy regression. (#2506)

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Current master has a regression 'mc policy <policy-type> alias/bucket/prefix'
does not work anymore, due to the way new minio-go changes do json marshalling.
This led to a regression on server side when a ``prefix`` is provided
policy is rejected as malformed from th server which is not the case with
AWS S3.

This patch uses the new ``minio-go/pkg/set`` package to address the
unmarshalling problems.

Fixes #2503
This commit is contained in:
Harshavardhana
2016-08-20 03:16:38 -07:00
committed by GitHub
parent a3c509fd23
commit 975eb31973
9 changed files with 553 additions and 186 deletions
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196
vendor/github.com/minio/minio-go/pkg/set/stringset.go generated vendored Normal file
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/*
* Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2016 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 set
import (
"encoding/json"
"fmt"
"sort"
)
// StringSet - uses map as set of strings.
type StringSet map[string]struct{}
// keys - returns StringSet keys.
func (set StringSet) keys() []string {
keys := make([]string, 0, len(set))
for k := range set {
keys = append(keys, k)
}
sort.Strings(keys)
return keys
}
// IsEmpty - returns whether the set is empty or not.
func (set StringSet) IsEmpty() bool {
return len(set) == 0
}
// Add - adds string to the set.
func (set StringSet) Add(s string) {
set[s] = struct{}{}
}
// Remove - removes string in the set. It does nothing if string does not exist in the set.
func (set StringSet) Remove(s string) {
delete(set, s)
}
// Contains - checks if string is in the set.
func (set StringSet) Contains(s string) bool {
_, ok := set[s]
return ok
}
// FuncMatch - returns new set containing each value who passes match function.
// A 'matchFn' should accept element in a set as first argument and
// 'matchString' as second argument. The function can do any logic to
// compare both the arguments and should return true to accept element in
// a set to include in output set else the element is ignored.
func (set StringSet) FuncMatch(matchFn func(string, string) bool, matchString string) StringSet {
nset := NewStringSet()
for k := range set {
if matchFn(k, matchString) {
nset.Add(k)
}
}
return nset
}
// ApplyFunc - returns new set containing each value processed by 'applyFn'.
// A 'applyFn' should accept element in a set as a argument and return
// a processed string. The function can do any logic to return a processed
// string.
func (set StringSet) ApplyFunc(applyFn func(string) string) StringSet {
nset := NewStringSet()
for k := range set {
nset.Add(applyFn(k))
}
return nset
}
// Equals - checks whether given set is equal to current set or not.
func (set StringSet) Equals(sset StringSet) bool {
// If length of set is not equal to length of given set, the
// set is not equal to given set.
if len(set) != len(sset) {
return false
}
// As both sets are equal in length, check each elements are equal.
for k := range set {
if _, ok := sset[k]; !ok {
return false
}
}
return true
}
// Intersection - returns the intersection with given set as new set.
func (set StringSet) Intersection(sset StringSet) StringSet {
nset := NewStringSet()
for k := range set {
if _, ok := sset[k]; ok {
nset.Add(k)
}
}
return nset
}
// Difference - returns the difference with given set as new set.
func (set StringSet) Difference(sset StringSet) StringSet {
nset := NewStringSet()
for k := range set {
if _, ok := sset[k]; !ok {
nset.Add(k)
}
}
return nset
}
// Union - returns the union with given set as new set.
func (set StringSet) Union(sset StringSet) StringSet {
nset := NewStringSet()
for k := range set {
nset.Add(k)
}
for k := range sset {
nset.Add(k)
}
return nset
}
// MarshalJSON - converts to JSON data.
func (set StringSet) MarshalJSON() ([]byte, error) {
return json.Marshal(set.keys())
}
// UnmarshalJSON - parses JSON data and creates new set with it.
// If 'data' contains JSON string array, the set contains each string.
// If 'data' contains JSON string, the set contains the string as one element.
// If 'data' contains Other JSON types, JSON parse error is returned.
func (set *StringSet) UnmarshalJSON(data []byte) error {
sl := []string{}
var err error
if err = json.Unmarshal(data, &sl); err == nil {
*set = make(StringSet)
for _, s := range sl {
set.Add(s)
}
} else {
var s string
if err = json.Unmarshal(data, &s); err == nil {
*set = make(StringSet)
set.Add(s)
}
}
return err
}
// String - returns printable string of the set.
func (set StringSet) String() string {
return fmt.Sprintf("%s", set.keys())
}
// NewStringSet - creates new string set.
func NewStringSet() StringSet {
return make(StringSet)
}
// CreateStringSet - creates new string set with given string values.
func CreateStringSet(sl ...string) StringSet {
set := make(StringSet)
for _, k := range sl {
set.Add(k)
}
return set
}
// CopyStringSet - returns copy of given set.
func CopyStringSet(set StringSet) StringSet {
nset := NewStringSet()
for k, v := range set {
nset[k] = v
}
return nset
}