You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
minio/pkg/bucket/policy/condition/dateequalsfunc.go

165 lines
4.3 KiB

/*
* MinIO Cloud Storage, (C) 2020 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 condition
import (
"fmt"
"net/http"
"reflect"
"time"
)
func toDateEqualsFuncString(n name, key Key, value time.Time) string {
return fmt.Sprintf("%v:%v:%v", n, key, value.Format(time.RFC3339))
}
// dateEqualsFunc - String equals function. It checks whether value by Key in given
// values map is in condition values.
// For example,
// - if values = ["mybucket/foo"], at evaluate() it returns whether string
// in value map for Key is in values.
type dateEqualsFunc struct {
k Key
value time.Time
}
// evaluate() - evaluates to check whether value by Key in given values is in
// condition values.
func (f dateEqualsFunc) evaluate(values map[string][]string) bool {
requestValue, ok := values[http.CanonicalHeaderKey(f.k.Name())]
if !ok {
requestValue = values[f.k.Name()]
}
if len(requestValue) == 0 {
return false
}
t, err := time.Parse(time.RFC3339, requestValue[0])
if err != nil {
return false
}
return f.value.Equal(t)
}
// key() - returns condition key which is used by this condition function.
func (f dateEqualsFunc) key() Key {
return f.k
}
// name() - returns "DateEquals" condition name.
func (f dateEqualsFunc) name() name {
return dateEquals
}
func (f dateEqualsFunc) String() string {
return toDateEqualsFuncString(dateEquals, f.k, f.value)
}
// toMap - returns map representation of this function.
func (f dateEqualsFunc) toMap() map[Key]ValueSet {
if !f.k.IsValid() {
return nil
}
values := NewValueSet()
values.Add(NewStringValue(f.value.Format(time.RFC3339)))
return map[Key]ValueSet{
f.k: values,
}
}
// dateNotEqualsFunc - String not equals function. It checks whether value by Key in
// given values is NOT in condition values.
// For example,
// - if values = ["mybucket/foo"], at evaluate() it returns whether string
// in value map for Key is NOT in values.
type dateNotEqualsFunc struct {
dateEqualsFunc
}
// evaluate() - evaluates to check whether value by Key in given values is NOT in
// condition values.
func (f dateNotEqualsFunc) evaluate(values map[string][]string) bool {
return !f.dateEqualsFunc.evaluate(values)
}
// name() - returns "DateNotEquals" condition name.
func (f dateNotEqualsFunc) name() name {
return dateNotEquals
}
func (f dateNotEqualsFunc) String() string {
return toDateEqualsFuncString(dateNotEquals, f.dateEqualsFunc.k, f.dateEqualsFunc.value)
}
func valueToTime(n name, values ValueSet) (v time.Time, err error) {
if len(values) != 1 {
return v, fmt.Errorf("only one value is allowed for %s condition", n)
}
for vs := range values {
switch vs.GetType() {
case reflect.String:
s, err := vs.GetString()
if err != nil {
return v, err
}
if v, err = time.Parse(time.RFC3339, s); err != nil {
return v, fmt.Errorf("value %s must be a time.Time string for %s condition: %w", vs, n, err)
}
default:
return v, fmt.Errorf("value %s must be a time.Time for %s condition", vs, n)
}
}
return v, nil
}
// newDateEqualsFunc - returns new DateEquals function.
func newDateEqualsFunc(key Key, values ValueSet) (Function, error) {
v, err := valueToTime(dateEquals, values)
if err != nil {
return nil, err
}
return NewDateEqualsFunc(key, v)
}
// NewDateEqualsFunc - returns new DateEquals function.
func NewDateEqualsFunc(key Key, value time.Time) (Function, error) {
return &dateEqualsFunc{key, value}, nil
}
// newDateNotEqualsFunc - returns new DateNotEquals function.
func newDateNotEqualsFunc(key Key, values ValueSet) (Function, error) {
v, err := valueToTime(dateNotEquals, values)
if err != nil {
return nil, err
}
return NewDateNotEqualsFunc(key, v)
}
// NewDateNotEqualsFunc - returns new DateNotEquals function.
func NewDateNotEqualsFunc(key Key, value time.Time) (Function, error) {
return &dateNotEqualsFunc{dateEqualsFunc{key, value}}, nil
}