133 lines
4 KiB
Go
133 lines
4 KiB
Go
/*
|
|
* MinIO Cloud Storage, (C) 2019 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 lifecycle
|
|
|
|
import (
|
|
"encoding/xml"
|
|
"time"
|
|
)
|
|
|
|
var (
|
|
errLifecycleInvalidDate = Errorf("Date must be provided in ISO 8601 format")
|
|
errLifecycleInvalidDays = Errorf("Days must be positive integer when used with Expiration")
|
|
errLifecycleInvalidExpiration = Errorf("At least one of Days or Date should be present inside Expiration")
|
|
errLifecycleDateNotMidnight = Errorf("'Date' must be at midnight GMT")
|
|
)
|
|
|
|
// ExpirationDays is a type alias to unmarshal Days in Expiration
|
|
type ExpirationDays int
|
|
|
|
// UnmarshalXML parses number of days from Expiration and validates if
|
|
// greater than zero
|
|
func (eDays *ExpirationDays) UnmarshalXML(d *xml.Decoder, startElement xml.StartElement) error {
|
|
var numDays int
|
|
err := d.DecodeElement(&numDays, &startElement)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if numDays <= 0 {
|
|
return errLifecycleInvalidDays
|
|
}
|
|
*eDays = ExpirationDays(numDays)
|
|
return nil
|
|
}
|
|
|
|
// MarshalXML encodes number of days to expire if it is non-zero and
|
|
// encodes empty string otherwise
|
|
func (eDays *ExpirationDays) MarshalXML(e *xml.Encoder, startElement xml.StartElement) error {
|
|
if *eDays == ExpirationDays(0) {
|
|
return nil
|
|
}
|
|
return e.EncodeElement(int(*eDays), startElement)
|
|
}
|
|
|
|
// ExpirationDate is a embedded type containing time.Time to unmarshal
|
|
// Date in Expiration
|
|
type ExpirationDate struct {
|
|
time.Time
|
|
}
|
|
|
|
// UnmarshalXML parses date from Expiration and validates date format
|
|
func (eDate *ExpirationDate) UnmarshalXML(d *xml.Decoder, startElement xml.StartElement) error {
|
|
var dateStr string
|
|
err := d.DecodeElement(&dateStr, &startElement)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// While AWS documentation mentions that the date specified
|
|
// must be present in ISO 8601 format, in reality they allow
|
|
// users to provide RFC 3339 compliant dates.
|
|
expDate, err := time.Parse(time.RFC3339, dateStr)
|
|
if err != nil {
|
|
return errLifecycleInvalidDate
|
|
}
|
|
// Allow only date timestamp specifying midnight GMT
|
|
hr, min, sec := expDate.Clock()
|
|
nsec := expDate.Nanosecond()
|
|
loc := expDate.Location()
|
|
if !(hr == 0 && min == 0 && sec == 0 && nsec == 0 && loc.String() == time.UTC.String()) {
|
|
return errLifecycleDateNotMidnight
|
|
}
|
|
|
|
*eDate = ExpirationDate{expDate}
|
|
return nil
|
|
}
|
|
|
|
// MarshalXML encodes expiration date if it is non-zero and encodes
|
|
// empty string otherwise
|
|
func (eDate *ExpirationDate) MarshalXML(e *xml.Encoder, startElement xml.StartElement) error {
|
|
if *eDate == (ExpirationDate{time.Time{}}) {
|
|
return nil
|
|
}
|
|
return e.EncodeElement(eDate.Format(time.RFC3339), startElement)
|
|
}
|
|
|
|
// Expiration - expiration actions for a rule in lifecycle configuration.
|
|
type Expiration struct {
|
|
XMLName xml.Name `xml:"Expiration"`
|
|
Days ExpirationDays `xml:"Days,omitempty"`
|
|
Date ExpirationDate `xml:"Date,omitempty"`
|
|
}
|
|
|
|
// Validate - validates the "Expiration" element
|
|
func (e Expiration) Validate() error {
|
|
// Neither expiration days or date is specified
|
|
if e.IsDaysNull() && e.IsDateNull() {
|
|
return errLifecycleInvalidExpiration
|
|
}
|
|
|
|
// Both expiration days and date are specified
|
|
if !e.IsDaysNull() && !e.IsDateNull() {
|
|
return errLifecycleInvalidExpiration
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// IsDaysNull returns true if days field is null
|
|
func (e Expiration) IsDaysNull() bool {
|
|
return e.Days == ExpirationDays(0)
|
|
}
|
|
|
|
// IsDateNull returns true if date field is null
|
|
func (e Expiration) IsDateNull() bool {
|
|
return e.Date.Time.IsZero()
|
|
}
|
|
|
|
// IsNull returns true if both date and days fields are null
|
|
func (e Expiration) IsNull() bool {
|
|
return e.IsDaysNull() && e.IsDateNull()
|
|
}
|