forked from minio/minio
/
args.go
192 lines (167 loc) · 5.58 KB
/
args.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
/*
* 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([]rune(parsedArgs.RecordDelimiter)) {
case 0:
parsedArgs.RecordDelimiter = defaultRecordDelimiter
case 1, 2:
default:
return fmt.Errorf("invalid RecordDelimiter '%v'", parsedArgs.RecordDelimiter)
}
switch len([]rune(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([]rune(parsedArgs.RecordDelimiter)) {
case 0:
parsedArgs.RecordDelimiter = defaultRecordDelimiter
case 1, 2:
default:
return fmt.Errorf("invalid RecordDelimiter '%v'", parsedArgs.RecordDelimiter)
}
switch len([]rune(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
}