Hugging Face's logo

Spaces:
Chrunos
/
load
Running

App Files Community
load
File size: 4,076 Bytes 
2f527a4
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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
 
import { env } from "../../config.js";

const resolutions = ["2160", "1440", "1080", "720", "480", "360", "240", "144"];

const oauthUrl = "https://oauth.vk.com/oauth/get_anonym_token";
const apiUrl = "https://api.vk.com/method";

const clientId = "51552953";
const clientSecret = "qgr0yWwXCrsxA1jnRtRX";

// used in stream/shared.js for accessing media files
export const vkClientAgent = "com.vk.vkvideo.prod/822 (iPhone, iOS 16.7.7, iPhone10,4, Scale/2.0) SAK/1.119";

const cachedToken = {
    token: "",
    expiry: 0,
    device_id: "",
};

const getToken = async () => {
    if (cachedToken.expiry - 10 > Math.floor(new Date().getTime() / 1000)) {
        return cachedToken.token;
    }

    const randomDeviceId = crypto.randomUUID().toUpperCase();

    const anonymOauth = new URL(oauthUrl);
    anonymOauth.searchParams.set("client_id", clientId);
    anonymOauth.searchParams.set("client_secret", clientSecret);
    anonymOauth.searchParams.set("device_id", randomDeviceId);

    const oauthResponse = await fetch(anonymOauth.toString(), {
        headers: {
            "user-agent": vkClientAgent,
        }
    }).then(r => {
        if (r.status === 200) {
            return r.json();
        }
    });

    if (!oauthResponse) return;

    if (oauthResponse?.token && oauthResponse?.expired_at && typeof oauthResponse?.expired_at === "number") {
        cachedToken.token = oauthResponse.token;
        cachedToken.expiry = oauthResponse.expired_at;
        cachedToken.device_id = randomDeviceId;
    }

    if (!cachedToken.token) return;

    return cachedToken.token;
}

const getVideo = async (ownerId, videoId, accessKey) => {
    const video = await fetch(`${apiUrl}/video.get`, {
        method: "POST",
        headers: {
            "content-type": "application/x-www-form-urlencoded; charset=utf-8",
            "user-agent": vkClientAgent,
        },
        body: new URLSearchParams({
            anonymous_token: cachedToken.token,
            device_id: cachedToken.device_id,
            lang: "en",
            v: "5.244",
            videos: `${ownerId}_${videoId}${accessKey ? `_${accessKey}` : ''}`
        }).toString()
    })
    .then(r => {
        if (r.status === 200) {
            return r.json();
        }
    });

    return video;
}

export default async function ({ ownerId, videoId, accessKey, quality }) {
    const token = await getToken();
    if (!token) return { error: "fetch.fail" };

    const videoGet = await getVideo(ownerId, videoId, accessKey);

    if (!videoGet || !videoGet.response || videoGet.response.items.length !== 1) {
        return { error: "fetch.empty" };
    }

    const video = videoGet.response.items[0];

    if (video.restriction) {
        const title = video.restriction.title;
        if (title.endsWith("country") || title.endsWith("region.")) {
            return { error: "content.video.region" };
        }
        if (title === "Processing video") {
            return { error: "fetch.empty" };
        }
        return { error: "content.video.unavailable" };
    }

    if (!video.files || !video.duration) {
        return { error: "fetch.fail" };
    }

    if (video.duration > env.durationLimit) {
        return { error: "content.too_long" };
    }

    const userQuality = quality === "max" ? resolutions[0] : quality;
    let pickedQuality;

    for (const resolution of resolutions) {
        if (video.files[`mp4_${resolution}`] && +resolution <= +userQuality) {
            pickedQuality = resolution;
            break
        }
    }

    const url = video.files[`mp4_${pickedQuality}`];

    if (!url) return { error: "fetch.fail" };

    const fileMetadata = {
        title: video.title.trim(),
    }

    return {
        urls: url,
        fileMetadata,
        filenameAttributes: {
            service: "vk",
            id: `${ownerId}_${videoId}${accessKey ? `_${accessKey}` : ''}`,
            title: fileMetadata.title,
            resolution: `${pickedQuality}p`,
            qualityLabel: `${pickedQuality}p`,
            extension: "mp4"
        }
    }
}