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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
|
// Copyright 2019 The Hugo Authors. All rights reserved.
//
// 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 media
import (
"encoding/json"
"errors"
"fmt"
"sort"
"strings"
"github.com/gohugoio/hugo/common/maps"
"github.com/mitchellh/mapstructure"
)
const (
defaultDelimiter = "."
)
// Type (also known as MIME type and content type) is a two-part identifier for
// file formats and format contents transmitted on the Internet.
// For Hugo's use case, we use the top-level type name / subtype name + suffix.
// One example would be application/svg+xml
// If suffix is not provided, the sub type will be used.
// See // https://en.wikipedia.org/wiki/Media_type
type Type struct {
MainType string `json:"mainType"` // i.e. text
SubType string `json:"subType"` // i.e. html
// This is the optional suffix after the "+" in the MIME type,
// e.g. "xml" in "applicatiion/rss+xml".
mimeSuffix string
Delimiter string `json:"delimiter"` // e.g. "."
// TODO(bep) make this a string to make it hashable + method
Suffixes []string `json:"suffixes"`
// Set when doing lookup by suffix.
fileSuffix string
}
// FromStringAndExt is same as FromString, but adds the file extension to the type.
func FromStringAndExt(t, ext string) (Type, error) {
tp, err := fromString(t)
if err != nil {
return tp, err
}
tp.Suffixes = []string{strings.TrimPrefix(ext, ".")}
return tp, nil
}
// FromString creates a new Type given a type string on the form MainType/SubType and
// an optional suffix, e.g. "text/html" or "text/html+html".
func fromString(t string) (Type, error) {
t = strings.ToLower(t)
parts := strings.Split(t, "/")
if len(parts) != 2 {
return Type{}, fmt.Errorf("cannot parse %q as a media type", t)
}
mainType := parts[0]
subParts := strings.Split(parts[1], "+")
subType := strings.Split(subParts[0], ";")[0]
var suffix string
if len(subParts) > 1 {
suffix = subParts[1]
}
return Type{MainType: mainType, SubType: subType, mimeSuffix: suffix}, nil
}
// Type returns a string representing the main- and sub-type of a media type, e.g. "text/css".
// A suffix identifier will be appended after a "+" if set, e.g. "image/svg+xml".
// Hugo will register a set of default media types.
// These can be overridden by the user in the configuration,
// by defining a media type with the same Type.
func (m Type) Type() string {
// Examples are
// image/svg+xml
// text/css
if m.mimeSuffix != "" {
return fmt.Sprintf("%s/%s+%s", m.MainType, m.SubType, m.mimeSuffix)
}
return fmt.Sprintf("%s/%s", m.MainType, m.SubType)
}
func (m Type) String() string {
return m.Type()
}
// FullSuffix returns the file suffix with any delimiter prepended.
func (m Type) FullSuffix() string {
return m.Delimiter + m.Suffix()
}
// Suffix returns the file suffix without any delmiter prepended.
func (m Type) Suffix() string {
if m.fileSuffix != "" {
return m.fileSuffix
}
if len(m.Suffixes) > 0 {
return m.Suffixes[0]
}
// There are MIME types without file suffixes.
return ""
}
// Definitions from https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types etc.
// Note that from Hugo 0.44 we only set Suffix if it is part of the MIME type.
var (
CalendarType = Type{MainType: "text", SubType: "calendar", Suffixes: []string{"ics"}, Delimiter: defaultDelimiter}
CSSType = Type{MainType: "text", SubType: "css", Suffixes: []string{"css"}, Delimiter: defaultDelimiter}
SCSSType = Type{MainType: "text", SubType: "x-scss", Suffixes: []string{"scss"}, Delimiter: defaultDelimiter}
SASSType = Type{MainType: "text", SubType: "x-sass", Suffixes: []string{"sass"}, Delimiter: defaultDelimiter}
CSVType = Type{MainType: "text", SubType: "csv", Suffixes: []string{"csv"}, Delimiter: defaultDelimiter}
HTMLType = Type{MainType: "text", SubType: "html", Suffixes: []string{"html"}, Delimiter: defaultDelimiter}
JavascriptType = Type{MainType: "application", SubType: "javascript", Suffixes: []string{"js"}, Delimiter: defaultDelimiter}
JSONType = Type{MainType: "application", SubType: "json", Suffixes: []string{"json"}, Delimiter: defaultDelimiter}
RSSType = Type{MainType: "application", SubType: "rss", mimeSuffix: "xml", Suffixes: []string{"xml"}, Delimiter: defaultDelimiter}
XMLType = Type{MainType: "application", SubType: "xml", Suffixes: []string{"xml"}, Delimiter: defaultDelimiter}
SVGType = Type{MainType: "image", SubType: "svg", mimeSuffix: "xml", Suffixes: []string{"svg"}, Delimiter: defaultDelimiter}
TextType = Type{MainType: "text", SubType: "plain", Suffixes: []string{"txt"}, Delimiter: defaultDelimiter}
TOMLType = Type{MainType: "application", SubType: "toml", Suffixes: []string{"toml"}, Delimiter: defaultDelimiter}
YAMLType = Type{MainType: "application", SubType: "yaml", Suffixes: []string{"yaml", "yml"}, Delimiter: defaultDelimiter}
// Common image types
PNGType = Type{MainType: "image", SubType: "png", Suffixes: []string{"png"}, Delimiter: defaultDelimiter}
JPGType = Type{MainType: "image", SubType: "jpg", Suffixes: []string{"jpg", "jpeg"}, Delimiter: defaultDelimiter}
OctetType = Type{MainType: "application", SubType: "octet-stream"}
)
// DefaultTypes is the default media types supported by Hugo.
var DefaultTypes = Types{
CalendarType,
CSSType,
CSVType,
SCSSType,
SASSType,
HTMLType,
JavascriptType,
JSONType,
RSSType,
XMLType,
SVGType,
TextType,
|