blob: d7f01448aa559188b85e3b8295ad2af6ebe65b8c (
plain)
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
|
;;;; downloader.lisp
(in-package #:vampire)
(defvar *dl-cluster*
nil)
(defun start-downloader-service (&key (count 5))
(setf *dl-cluster* (or *dl-cluster* (legion:make-cluster count 'run-job)))
(legion:start *dl-cluster*))
(defun run-job (thunk)
(funcall thunk))
(defun add-fetch-track-job (url ok err)
(legion:add-job
*dl-cluster*
(lambda ()
(if-let (track (download-media url))
(funcall ok track)
(funcall err url)))))
(defun info-file-with-name (dir name)
(merge-pathnames
(format nil "~a.info.json" name)
dir))
(defun trackinfo (path)
"Returns a trackinfo object - a list whose first member is a path to
a file and whose CDR is a PLIST of attributes to pass
to (make-instance 'track ...)"
(with-plist ((title :|title|)
(album :|album|)
(codec :|acodec|)
(artist :|artist|)
(dur :|duration|)
(file :|_filename|)
(thumbs :|thumbnails|)
(source :|webpage_url|))
(jonathan:parse (alexandria:read-file-into-string path))
(with-plist ((url :|url|)) (first thumbs)
(values file
(list
:source source
:title title
:album album
:codec codec
:artist artist
:duration dur
:thumb-url url)))))
(defun download-media (url)
(with-temp-dir (tmpdir)
(let* ((tmpname
(default-name "media"))
(trackinfo-file
(info-file-with-name tmpdir tmpname)))
(uiop:run-program
(format nil "youtube-dl --write-info-json -x -o \"~a/~a.%(ext)s\" ~a"
tmpdir tmpname url))
(when (uiop:file-exists-p trackinfo-file)
(multiple-value-bind (file plist) (trackinfo trackinfo-file)
(new-track file plist))))))
|
