1f262daf6f
This is to ensure that there are no projects that try to import `minio/minio/pkg` into their own repo. Any such common packages should go to `https://github.com/minio/pkg`
103 lines
2.5 KiB
Go
103 lines
2.5 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package lifecycle
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import (
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"encoding/xml"
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"io"
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"unicode/utf8"
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)
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// Tag - a tag for a lifecycle configuration Rule filter.
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type Tag struct {
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XMLName xml.Name `xml:"Tag"`
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Key string `xml:"Key,omitempty"`
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Value string `xml:"Value,omitempty"`
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}
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var (
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errInvalidTagKey = Errorf("The TagKey you have provided is invalid")
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errInvalidTagValue = Errorf("The TagValue you have provided is invalid")
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errDuplicatedXMLTag = Errorf("duplicated XML Tag")
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errUnknownXMLTag = Errorf("unknown XML Tag")
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)
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// UnmarshalXML - decodes XML data.
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func (tag *Tag) UnmarshalXML(d *xml.Decoder, start xml.StartElement) (err error) {
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var keyAlreadyParsed, valueAlreadyParsed bool
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for {
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// Read tokens from the XML document in a stream.
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t, err := d.Token()
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if err != nil {
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if err == io.EOF {
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break
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}
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return err
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}
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switch se := t.(type) {
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case xml.StartElement:
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var s string
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if err = d.DecodeElement(&s, &se); err != nil {
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return err
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}
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switch se.Name.Local {
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case "Key":
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if keyAlreadyParsed {
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return errDuplicatedXMLTag
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}
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tag.Key = s
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keyAlreadyParsed = true
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case "Value":
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if valueAlreadyParsed {
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return errDuplicatedXMLTag
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}
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tag.Value = s
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valueAlreadyParsed = true
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default:
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return errUnknownXMLTag
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}
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}
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}
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return nil
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}
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func (tag Tag) String() string {
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return tag.Key + "=" + tag.Value
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}
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// IsEmpty returns whether this tag is empty or not.
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func (tag Tag) IsEmpty() bool {
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return tag.Key == ""
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}
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// Validate checks this tag.
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func (tag Tag) Validate() error {
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if len(tag.Key) == 0 || utf8.RuneCountInString(tag.Key) > 128 {
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return errInvalidTagKey
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}
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if utf8.RuneCountInString(tag.Value) > 256 {
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return errInvalidTagValue
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}
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return nil
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}
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