Revert "Revert "暂时解决 因md5校验而无法下载的问题 resolved nondanee#98 (nondanee#101)…

…" (nondanee#102)"

This reverts commit a4560ae.

.gitignore

@@ -1,5 +1,6 @@
 # IDE
 .vscode
+.idea
 
 # Logs
 logs

hook.js

@@ -1,7 +1,9 @@
 const parse = require('url').parse
 const crypto = require('./crypto')
+const nativeCrypto = require('crypto')
 const request = require('./request')
 const match = require('./provider/match')
+const cache = require('./cache')
 
 const hook = {
 	request: {
@@ -244,6 +246,19 @@ const tryLike = ctx => {
 	.catch(() => {})
 }
 
+const getFileMD5 = url => {
+	return request('GET', url)
+		.then(response => {
+			return new Promise((resolve, reject) => {
+				let file_md5 = nativeCrypto.createHash('md5')
+				response
+					.on('data', chunk => file_md5.update(chunk))
+					.on('end', () => resolve(file_md5.digest('hex')))
+					.on('error', error => reject(error))
+			})
+		})
+}
+
 const tryMatch = ctx => {
 	const netease = ctx.netease
 	const jsonBody = netease.jsonBody
@@ -260,6 +275,43 @@ const tryMatch = ctx => {
 				item.code = 200
 				item.br = 320000
 				item.type = 'mp3'
+				if(!item.md5) {
+					const fakeMD5 = () => {
+						item.md5 = crypto.md5(song.url)
+					}
+					if(ctx.netease.path === '/api/song/enhance/download/url') {
+						// Android版 6.0.0以上 / Mac版 2.0.0以上 预下载 计算md5
+						const overVersion = (a, b) => {
+							const version_arr_a = a.split('.')
+							const version_arr_b = b.split('.')
+							return !(version_arr_a.find((single, i) => parseInt(single) < parseInt(version_arr_b[i])))
+						}
+						try {
+							let header = ctx.netease.param.header
+							if(typeof header === 'string') {
+								header = JSON.parse(ctx.netease.param.header)
+							}
+							const {os, appver} = header
+							console.log('Download device:', os, appver)
+							const limit = {
+								android: '6.0.0',
+								osx: '2.0.0'
+							}
+							if(limit[os] && overVersion(appver, limit[os])) {
+								// 设置7天的缓存 同一个文件地址 MD5应该不会频繁变化
+								return cache(getFileMD5, song.url, 7 * 24 * 60 * 60 * 1000)
+									.then(md5 => item.md5 = md5)
+							} else {
+								fakeMD5()
+							}
+						} catch (e) {
+							console.log('Unknow device')
+							fakeMD5()
+						}
+					} else {
+						fakeMD5()
+					}
+				}
 			})
 			.catch(() => {})
 		}

provider/match.js

@@ -42,7 +42,6 @@ const check = url => {
 			song.md5 = response.headers['server-md5']
 		else if(url.includes('xiami.net') || url.includes('qianqian.com'))
 			song.md5 = response.headers['etag'].replace(/"/g, '').toLowerCase()
-		song.md5 = (song.md5) ? song.md5 : crypto.md5(url) //placeholder
 		song.size = parseInt(response.headers['content-length']) || 0
 		song.url = response.url.href
 	})