76 lines
1.8 KiB
TypeScript
76 lines
1.8 KiB
TypeScript
/* eslint-disable no-extend-native */
|
|
|
|
import scoreinfo from './scoreinfo'
|
|
import { onPackLoad, loadAllPacks } from './webpack-hook'
|
|
|
|
type FileType = 'img' | 'mp3' | 'midi'
|
|
|
|
const AUTH_REG = /,((\d+\.\..+?)?function\(\)\{var \w=Array.prototype.slice.*?)\)(\[|\.then)/
|
|
|
|
enum PACK_HINT {
|
|
img = 'getImageRef',
|
|
midi = 'midi:',
|
|
mp3 = 'setVolume:',
|
|
}
|
|
|
|
/**
|
|
* I know this is super hacky.
|
|
*/
|
|
const magicHookConstr = async (type: FileType) => {
|
|
// request pack
|
|
await loadAllPacks()
|
|
|
|
return new Promise<string>((resolve) => {
|
|
onPackLoad((pack) => {
|
|
Object.values(pack[1]).forEach((mod) => {
|
|
const str = mod.toString()
|
|
if (!str.includes(PACK_HINT[type])) {
|
|
return
|
|
}
|
|
|
|
const m = str.match(AUTH_REG)
|
|
if (m) {
|
|
const code = m[1]
|
|
try {
|
|
// eslint-disable-next-line no-new-func, @typescript-eslint/no-implied-eval
|
|
const magic = Function(`return (${code})`)()
|
|
resolve(magic)
|
|
} catch (err) {
|
|
console.error(err)
|
|
}
|
|
}
|
|
})
|
|
})
|
|
})
|
|
}
|
|
|
|
const magics: Record<FileType, Promise<string>> = {
|
|
img: magicHookConstr('img'),
|
|
midi: magicHookConstr('midi'),
|
|
mp3: magicHookConstr('mp3'),
|
|
}
|
|
|
|
const getApiUrl = (type: FileType, index: number): string => {
|
|
return `/api/jmuse?id=${scoreinfo.id}&type=${type}&index=${index}&v2=1`
|
|
}
|
|
|
|
const getApiAuth = async (type: FileType, index: number): Promise<string> => {
|
|
// eslint-disable-next-line no-void
|
|
void index
|
|
return magics[type]
|
|
}
|
|
|
|
export const getFileUrl = async (type: FileType, index = 0): Promise<string> => {
|
|
const url = getApiUrl(type, index)
|
|
const auth = await getApiAuth(type, index)
|
|
|
|
const r = await fetch(url, {
|
|
headers: {
|
|
Authorization: auth,
|
|
},
|
|
})
|
|
|
|
const { info } = await r.json()
|
|
return info.url as string
|
|
}
|