/
bilibili.go
434 lines (404 loc) 路 10.8 KB
/
bilibili.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
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
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
package bilibili
import (
"encoding/json"
"errors"
"fmt"
"strconv"
"strings"
"github.com/iawia002/annie/extractors/types"
"github.com/iawia002/annie/parser"
"github.com/iawia002/annie/request"
"github.com/iawia002/annie/utils"
)
const (
bilibiliAPI = "https://api.bilibili.com/x/player/playurl?"
bilibiliBangumiAPI = "https://api.bilibili.com/pgc/player/web/playurl?"
bilibiliTokenAPI = "https://api.bilibili.com/x/player/playurl/token?"
)
const referer = "https://www.bilibili.com"
var utoken string
func genAPI(aid, cid, quality int, bvid string, bangumi bool, cookie string) (string, error) {
var (
err error
baseAPIURL string
params string
)
if cookie != "" && utoken == "" {
utoken, err = request.Get(
fmt.Sprintf("%said=%d&cid=%d", bilibiliTokenAPI, aid, cid),
referer,
nil,
)
if err != nil {
return "", err
}
var t token
err = json.Unmarshal([]byte(utoken), &t)
if err != nil {
return "", err
}
if t.Code != 0 {
return "", fmt.Errorf("cookie error: %s", t.Message)
}
utoken = t.Data.Token
}
var api string
if bangumi {
// The parameters need to be sorted by name
// qn=0 flag makes the CDN address different every time
// quality=120(4k) is the highest quality so far
params = fmt.Sprintf(
"cid=%d&bvid=%s&qn=%d&type=&otype=json&fourk=1&fnver=0&fnval=16",
cid, bvid, quality,
)
baseAPIURL = bilibiliBangumiAPI
} else {
params = fmt.Sprintf(
"avid=%d&cid=%d&bvid=%s&qn=%d&type=&otype=json&fourk=1&fnver=0&fnval=16",
aid, cid, bvid, quality,
)
baseAPIURL = bilibiliAPI
}
api = baseAPIURL + params
// bangumi utoken also need to put in params to sign, but the ordinary video doesn't need
if !bangumi && utoken != "" {
api = fmt.Sprintf("%s&utoken=%s", api, utoken)
}
return api, nil
}
func genParts(dashData *dashInfo, quality int, referer string) ([]*types.Part, error) {
parts := make([]*types.Part, 1)
if dashData.Streams.Audio == nil {
url := dashData.DURL[0].URL
_, ext, err := utils.GetNameAndExt(url)
if err != nil {
return nil, err
}
parts[0] = &types.Part{
URL: url,
Size: dashData.DURL[0].Size,
Ext: ext,
}
} else {
checked := false
for _, stream := range dashData.Streams.Video {
if stream.ID == quality {
s, err := request.Size(stream.BaseURL, referer)
if err != nil {
return nil, err
}
parts[0] = &types.Part{
URL: stream.BaseURL,
Size: s,
Ext: "mp4",
}
checked = true
break
}
}
if !checked {
return nil, nil
}
}
return parts, nil
}
type bilibiliOptions struct {
url string
html string
bangumi bool
aid int
cid int
bvid string
page int
subtitle string
}
func extractBangumi(url, html string, extractOption types.Options) ([]*types.Data, error) {
dataString := utils.MatchOneOf(html, `window.__INITIAL_STATE__=(.+?);\(function`)[1]
var data bangumiData
err := json.Unmarshal([]byte(dataString), &data)
if err != nil {
return nil, err
}
if !extractOption.Playlist {
aid := data.EpInfo.Aid
cid := data.EpInfo.Cid
bvid := data.EpInfo.BVid
if aid <= 0 || cid <= 0 || bvid == "" {
aid = data.EpList[0].Aid
cid = data.EpList[0].Cid
bvid = data.EpList[0].BVid
}
options := bilibiliOptions{
url: url,
html: html,
bangumi: true,
aid: aid,
cid: cid,
bvid: bvid,
}
return []*types.Data{bilibiliDownload(options, extractOption)}, nil
}
// handle bangumi playlist
needDownloadItems := utils.NeedDownloadList(extractOption.Items, extractOption.ItemStart, extractOption.ItemEnd, len(data.EpList))
extractedData := make([]*types.Data, len(needDownloadItems))
wgp := utils.NewWaitGroupPool(extractOption.ThreadNumber)
dataIndex := 0
for index, u := range data.EpList {
if !utils.ItemInSlice(index+1, needDownloadItems) {
continue
}
wgp.Add()
id := u.EpID
if id == 0 {
id = u.ID
}
// html content can't be reused here
options := bilibiliOptions{
url: fmt.Sprintf("https://www.bilibili.com/bangumi/play/ep%d", id),
bangumi: true,
aid: u.Aid,
cid: u.Cid,
bvid: u.BVid,
}
go func(index int, options bilibiliOptions, extractedData []*types.Data) {
defer wgp.Done()
extractedData[index] = bilibiliDownload(options, extractOption)
}(dataIndex, options, extractedData)
dataIndex++
}
wgp.Wait()
return extractedData, nil
}
func getMultiPageData(html string) (*multiPage, error) {
var data multiPage
multiPageDataString := utils.MatchOneOf(
html, `window.__INITIAL_STATE__=(.+?);\(function`,
)
if multiPageDataString == nil {
return &data, errors.New("this page has no playlist")
}
err := json.Unmarshal([]byte(multiPageDataString[1]), &data)
if err != nil {
return nil, err
}
return &data, nil
}
func extractNormalVideo(url, html string, extractOption types.Options) ([]*types.Data, error) {
pageData, err := getMultiPageData(html)
if err != nil {
return nil, err
}
if !extractOption.Playlist {
// handle URL that has a playlist, mainly for unified titles
// <h1> tag does not include subtitles
// bangumi doesn't need this
pageString := utils.MatchOneOf(url, `\?p=(\d+)`)
var p int
if pageString == nil {
// https://www.bilibili.com/video/av20827366/
p = 1
} else {
// https://www.bilibili.com/video/av20827366/?p=2
p, _ = strconv.Atoi(pageString[1])
}
if len(pageData.VideoData.Pages) < p || p < 1 {
return nil, types.ErrURLParseFailed
}
page := pageData.VideoData.Pages[p-1]
options := bilibiliOptions{
url: url,
html: html,
aid: pageData.Aid,
bvid: pageData.BVid,
cid: page.Cid,
page: p,
}
// "part":"" or "part":"Untitled"
if page.Part == "Untitled" || len(pageData.VideoData.Pages) == 1 {
options.subtitle = ""
} else {
options.subtitle = page.Part
}
return []*types.Data{bilibiliDownload(options, extractOption)}, nil
}
// handle normal video playlist
// https://www.bilibili.com/video/av20827366/?p=1
needDownloadItems := utils.NeedDownloadList(extractOption.Items, extractOption.ItemStart, extractOption.ItemEnd, len(pageData.VideoData.Pages))
extractedData := make([]*types.Data, len(needDownloadItems))
wgp := utils.NewWaitGroupPool(extractOption.ThreadNumber)
dataIndex := 0
for index, u := range pageData.VideoData.Pages {
if !utils.ItemInSlice(index+1, needDownloadItems) {
continue
}
wgp.Add()
options := bilibiliOptions{
url: url,
html: html,
aid: pageData.Aid,
bvid: pageData.BVid,
cid: u.Cid,
subtitle: u.Part,
page: u.Page,
}
go func(index int, options bilibiliOptions, extractedData []*types.Data) {
defer wgp.Done()
extractedData[index] = bilibiliDownload(options, extractOption)
}(dataIndex, options, extractedData)
dataIndex++
}
wgp.Wait()
return extractedData, nil
}
type extractor struct{}
// New returns a youtube extractor.
func New() types.Extractor {
return &extractor{}
}
// Extract is the main function to extract the data.
func (e *extractor) Extract(url string, option types.Options) ([]*types.Data, error) {
var err error
html, err := request.Get(url, referer, nil)
if err != nil {
return nil, err
}
// set thread number to 1 manually to avoid http 412 error
option.ThreadNumber = 1
if strings.Contains(url, "bangumi") {
// handle bangumi
return extractBangumi(url, html, option)
}
// handle normal video
return extractNormalVideo(url, html, option)
}
// bilibiliDownload is the download function for a single URL
func bilibiliDownload(options bilibiliOptions, extractOption types.Options) *types.Data {
var (
err error
html string
)
if options.html != "" {
// reuse html string, but this can't be reused in case of playlist
html = options.html
} else {
html, err = request.Get(options.url, referer, nil)
if err != nil {
return types.EmptyData(options.url, err)
}
}
// Get "accept_quality" and "accept_description"
// "accept_description":["楂樻竻 1080P","楂樻竻 720P","娓呮櫚 480P","娴佺晠 360P"],
// "accept_quality":[120,112,80,48,32,16],
api, err := genAPI(options.aid, options.cid, 120, options.bvid, options.bangumi, extractOption.Cookie)
if err != nil {
return types.EmptyData(options.url, err)
}
jsonString, err := request.Get(api, referer, nil)
if err != nil {
return types.EmptyData(options.url, err)
}
var data dash
err = json.Unmarshal([]byte(jsonString), &data)
if err != nil {
return types.EmptyData(options.url, err)
}
var dashData dashInfo
if data.Data.Description == nil {
dashData = data.Result
} else {
dashData = data.Data
}
var audioPart *types.Part
if dashData.Streams.Audio != nil {
// Get audio part
var audioID int
audios := map[int]string{}
bandwidth := 0
for _, stream := range dashData.Streams.Audio {
if stream.Bandwidth > bandwidth {
audioID = stream.ID
bandwidth = stream.Bandwidth
}
audios[stream.ID] = stream.BaseURL
}
s, err := request.Size(audios[audioID], referer)
if err != nil {
return types.EmptyData(options.url, err)
}
audioPart = &types.Part{
URL: audios[audioID],
Size: s,
Ext: "m4a",
}
}
streams := make(map[string]*types.Stream, len(dashData.Quality))
for _, q := range dashData.Quality {
// Avoid duplicate streams
if _, ok := streams[strconv.Itoa(q)]; ok {
continue
}
api, err := genAPI(options.aid, options.cid, q, options.bvid, options.bangumi, extractOption.Cookie)
if err != nil {
return types.EmptyData(options.url, err)
}
jsonString, err := request.Get(api, referer, nil)
if err != nil {
return types.EmptyData(options.url, err)
}
err = json.Unmarshal([]byte(jsonString), &data)
if err != nil {
return types.EmptyData(options.url, err)
}
if data.Data.Description == nil {
dashData = data.Result
} else {
dashData = data.Data
}
parts, err := genParts(&dashData, q, options.url)
if parts == nil {
continue
}
if err != nil {
return types.EmptyData(options.url, err)
}
if audioPart != nil {
parts = append(parts, audioPart)
}
var size int64
for _, part := range parts {
size += part.Size
}
streams[strconv.Itoa(q)] = &types.Stream{
Parts: parts,
Size: size,
Quality: qualityString[q],
}
if audioPart != nil {
streams[strconv.Itoa(q)].NeedMux = true
}
}
// get the title
doc, err := parser.GetDoc(html)
if err != nil {
return types.EmptyData(options.url, err)
}
title := parser.Title(doc)
if options.subtitle != "" {
if extractOption.EpisodeTitleOnly {
title = fmt.Sprintf("P%d %s", options.page, options.subtitle)
} else {
title = fmt.Sprintf("%s P%d %s", title, options.page, options.subtitle)
}
}
return &types.Data{
Site: "鍝斿摡鍝斿摡 bilibili.com",
Title: title,
Type: types.DataTypeVideo,
Streams: streams,
Caption: &types.Part{
URL: fmt.Sprintf("https://comment.bilibili.com/%d.xml", options.cid),
Ext: "xml",
},
URL: options.url,
}
}