musescore-downloader核心技术揭秘：反检测机制与API调用原理

musescore-downloader核心技术揭秘反检测机制与API调用原理【免费下载链接】musescore-downloader⚠️ This repo has moved to https://github.com/LibreScore/dl-librescore ⚠️ | Download sheet music (MSCZ, PDF, MusicXML, MIDI, MP3, download individual parts as PDF) from musescore.com for free, no login or Musescore Pro required | 免登录、免 Musescore Pro免费下载 musescore.com 上的曲谱项目地址: https://gitcode.com/gh_mirrors/mu/musescore-downloadermusescore-downloader是一款功能强大的免费工具能够帮助用户免登录、免Musescore Pro账号轻松下载musescore.com上的各类曲谱文件包括MSCZ、PDF、MusicXML、MIDI和MP3等格式。本文将深入剖析其核心技术揭秘反检测机制与API调用原理让你全面了解这款工具的工作方式。直观的使用界面展示使用musescore-downloader后在musescore.com的曲谱页面会新增一系列下载按钮用户可以直接选择所需的格式进行下载操作十分便捷。巧妙的反检测机制函数伪装技术musescore-downloader通过makeNative函数实现了对原生函数的伪装。该函数使用Map存储原始函数与钩子函数的映射关系当调用被hook的函数的toString方法时会返回原始函数的字符串表示从而避免被网站的检测机制识别出函数已被篡改。相关代码位于src/anti-detection.ts文件中核心实现如下export const makeNative (() { const l new MapFunction, Function() hookNative(Function.prototype, toString, (_toString) { return function () { if (l.has(this)) { const _fn l.get(this) || parseInt if (l.has(_fn)) { return _fn.toString() } else { return _toString.call(_fn) as string } } return _toString.call(this) as string } }, true) return (fn: Function, original: Function) { l.set(fn, original) } })()原生函数钩子hookNative函数是实现反检测的关键它能够在不被网站察觉的情况下对原生函数进行钩子操作。该函数会先保存原始函数然后用新的钩子函数替换原始函数并通过makeNative函数确保钩子函数在调用toString时返回原始函数的信息。export function hookNativeT extends object, M extends (keyof T) ( target: T, method: M, hook: (originalFn: T[M], detach: () void) T[M], async false, ): void { const _fn target[method] const detach () { target[method] _fn } const hookedFn hook(_fn, detach) target[method] hookedFn if (!async) { makeNative(hookedFn as any, _fn as any) } else { setTimeout(() { makeNative(hookedFn as any, _fn as any) }) } }高效的API调用原理获取主CIDmusescore-downloader通过调用IPFS相关API获取主CIDContent Identifier这是获取曲谱文件的关键步骤。相关代码在src/mscz.ts中export const getMainCid async (scoreinfo: ScoreInfo, _fetch getFetch()): Promisestring { let result scoreinfo.store.get(MAIN_CID_SYM) as string if (result) { return result } const r await _fetch(IPNS_RS_URL) assertRes(r) const json await r.json() result json.Cid[/] scoreinfo.store.set(MAIN_CID_SYM, result) return result }加载曲谱文件URL在获取主CID后工具会进一步加载曲谱文件的URL为后续下载做准备export const loadMsczUrl async (scoreinfo: ScoreInfo, _fetch getFetch()): Promisestring { let result scoreinfo.store.get(MSCZ_URL_SYM) as string if (result) { return result } const mainCid await getMainCid(scoreinfo, _fetch) const url scoreinfo.getMsczCidUrl(mainCid) const r0 await _fetch(url) if (r0.status ! 500) { assertRes(r0) } const cidRes: { Key: string; Message: string } await r0.json() const cid cidRes.Key if (!cid) { const err cidRes.Message if (err.includes(no link named)) { throw new Error(Score not in dataset) } else { throw new Error(err) } } result https://ipfs.infura.io/ipfs/${cid} scoreinfo.store.set(MSCZ_URL_SYM, result) return result }下载曲谱文件最后工具通过获取到的URL下载曲谱文件并提供保存功能export const fetchMscz async (scoreinfo: ScoreInfo, _fetch getFetch()): PromiseArrayBuffer { let msczBufferP scoreinfo.store.get(MSCZ_BUF_SYM) as PromiseArrayBuffer | undefined if (!msczBufferP) { msczBufferP (async (): PromiseArrayBuffer { const url await loadMsczUrl(scoreinfo, _fetch) const r await _fetch(url) assertRes(r) const data await r.arrayBuffer() return data })() scoreinfo.store.set(MSCZ_BUF_SYM, msczBufferP) } return msczBufferP }总结musescore-downloader通过巧妙的反检测机制和高效的API调用原理实现了对musescore.com曲谱的免费下载。其核心技术包括函数伪装、原生函数钩子、IPFS API调用等这些技术的结合使得工具能够在不被网站检测的情况下顺利获取并下载曲谱文件。如果你对该项目感兴趣可以通过以下命令克隆仓库进行深入研究git clone https://gitcode.com/gh_mirrors/mu/musescore-downloader希望本文能够帮助你更好地了解musescore-downloader的核心技术让你在使用这款工具时更加得心应手。【免费下载链接】musescore-downloader⚠️ This repo has moved to https://github.com/LibreScore/dl-librescore ⚠️ | Download sheet music (MSCZ, PDF, MusicXML, MIDI, MP3, download individual parts as PDF) from musescore.com for free, no login or Musescore Pro required | 免登录、免 Musescore Pro免费下载 musescore.com 上的曲谱项目地址: https://gitcode.com/gh_mirrors/mu/musescore-downloader创作声明：本文部分内容由AI辅助生成（AIGC），仅供参考