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Copy pathargs.go
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192 lines (167 loc) · 5.54 KB
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/*
* 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 csv
import (
"encoding/xml"
"fmt"
"strings"
)
const (
none = "none"
use = "use"
ignore = "ignore"
defaultRecordDelimiter = "\n"
defaultFieldDelimiter = ","
defaultQuoteCharacter = `"`
defaultQuoteEscapeCharacter = `"`
defaultCommentCharacter = "#"
always = "always"
asneeded = "asneeded"
)
// ReaderArgs - represents elements inside <InputSerialization><CSV> in request XML.
type ReaderArgs struct {
FileHeaderInfo string `xml:"FileHeaderInfo"`
RecordDelimiter string `xml:"RecordDelimiter"`
FieldDelimiter string `xml:"FieldDelimiter"`
QuoteCharacter string `xml:"QuoteCharacter"`
QuoteEscapeCharacter string `xml:"QuoteEscapeCharacter"`
CommentCharacter string `xml:"Comments"`
AllowQuotedRecordDelimiter bool `xml:"AllowQuotedRecordDelimiter"`
unmarshaled bool
}
// IsEmpty - returns whether reader args is empty or not.
func (args *ReaderArgs) IsEmpty() bool {
return !args.unmarshaled
}
// UnmarshalXML - decodes XML data.
func (args *ReaderArgs) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
// Make subtype to avoid recursive UnmarshalXML().
type subReaderArgs ReaderArgs
parsedArgs := subReaderArgs{}
if err := d.DecodeElement(&parsedArgs, &start); err != nil {
return err
}
parsedArgs.FileHeaderInfo = strings.ToLower(parsedArgs.FileHeaderInfo)
switch parsedArgs.FileHeaderInfo {
case "":
parsedArgs.FileHeaderInfo = none
case none, use, ignore:
default:
return errInvalidFileHeaderInfo(fmt.Errorf("invalid FileHeaderInfo '%v'", parsedArgs.FileHeaderInfo))
}
switch len(parsedArgs.RecordDelimiter) {
case 0:
parsedArgs.RecordDelimiter = defaultRecordDelimiter
case 1, 2:
default:
return fmt.Errorf("invalid RecordDelimiter '%v'", parsedArgs.RecordDelimiter)
}
switch len(parsedArgs.FieldDelimiter) {
case 0:
parsedArgs.FieldDelimiter = defaultFieldDelimiter
case 1:
default:
return fmt.Errorf("invalid FieldDelimiter '%v'", parsedArgs.FieldDelimiter)
}
switch parsedArgs.QuoteCharacter {
case "":
parsedArgs.QuoteCharacter = defaultQuoteCharacter
case defaultQuoteCharacter:
default:
return fmt.Errorf("unsupported QuoteCharacter '%v'", parsedArgs.QuoteCharacter)
}
switch parsedArgs.QuoteEscapeCharacter {
case "":
parsedArgs.QuoteEscapeCharacter = defaultQuoteEscapeCharacter
case defaultQuoteEscapeCharacter:
default:
return fmt.Errorf("unsupported QuoteEscapeCharacter '%v'", parsedArgs.QuoteEscapeCharacter)
}
switch parsedArgs.CommentCharacter {
case "":
parsedArgs.CommentCharacter = defaultCommentCharacter
case defaultCommentCharacter:
default:
return fmt.Errorf("unsupported Comments '%v'", parsedArgs.CommentCharacter)
}
if parsedArgs.AllowQuotedRecordDelimiter {
return fmt.Errorf("flag AllowQuotedRecordDelimiter is unsupported at the moment")
}
*args = ReaderArgs(parsedArgs)
args.unmarshaled = true
return nil
}
// WriterArgs - represents elements inside <OutputSerialization><CSV/> in request XML.
type WriterArgs struct {
QuoteFields string `xml:"QuoteFields"`
RecordDelimiter string `xml:"RecordDelimiter"`
FieldDelimiter string `xml:"FieldDelimiter"`
QuoteCharacter string `xml:"QuoteCharacter"`
QuoteEscapeCharacter string `xml:"QuoteEscapeCharacter"`
unmarshaled bool
}
// IsEmpty - returns whether writer args is empty or not.
func (args *WriterArgs) IsEmpty() bool {
return !args.unmarshaled
}
// UnmarshalXML - decodes XML data.
func (args *WriterArgs) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
// Make subtype to avoid recursive UnmarshalXML().
type subWriterArgs WriterArgs
parsedArgs := subWriterArgs{}
if err := d.DecodeElement(&parsedArgs, &start); err != nil {
return err
}
parsedArgs.QuoteFields = strings.ToLower(parsedArgs.QuoteFields)
switch parsedArgs.QuoteFields {
case "":
parsedArgs.QuoteFields = asneeded
case always, asneeded:
default:
return errInvalidQuoteFields(fmt.Errorf("invalid QuoteFields '%v'", parsedArgs.QuoteFields))
}
switch len(parsedArgs.RecordDelimiter) {
case 0:
parsedArgs.RecordDelimiter = defaultRecordDelimiter
case 1, 2:
default:
return fmt.Errorf("invalid RecordDelimiter '%v'", parsedArgs.RecordDelimiter)
}
switch len(parsedArgs.FieldDelimiter) {
case 0:
parsedArgs.FieldDelimiter = defaultFieldDelimiter
case 1:
default:
return fmt.Errorf("invalid FieldDelimiter '%v'", parsedArgs.FieldDelimiter)
}
switch parsedArgs.QuoteCharacter {
case "":
parsedArgs.QuoteCharacter = defaultQuoteCharacter
case defaultQuoteCharacter:
default:
return fmt.Errorf("unsupported QuoteCharacter '%v'", parsedArgs.QuoteCharacter)
}
switch parsedArgs.QuoteEscapeCharacter {
case "":
parsedArgs.QuoteEscapeCharacter = defaultQuoteEscapeCharacter
case defaultQuoteEscapeCharacter:
default:
return fmt.Errorf("unsupported QuoteEscapeCharacter '%v'", parsedArgs.QuoteEscapeCharacter)
}
*args = WriterArgs(parsedArgs)
args.unmarshaled = true
return nil
}