|
| 1 | +# ncmdump-web |
| 2 | + |
| 3 | +适用于Web页面的网易云加密格式NCM解密工具,直接在前端转换,无需后端交互。 |
| 4 | + |
| 5 | +由[taurusxin/ncmdump](https://github.com/taurusxin/ncmdump/)移植而来。 |
| 6 | + |
| 7 | +## 示例页面 |
| 8 | + |
| 9 | +这是一个简单的示例页面,可以直接使用。 |
| 10 | + |
| 11 | +[NCM 解密工具](https://tools.athbe.cn/ncm) |
| 12 | + |
| 13 | + |
| 14 | + |
| 15 | + |
| 16 | + |
| 17 | +## 构建 |
| 18 | + |
| 19 | + |
| 20 | + |
| 21 | +安装WASM工具链(如果没有的话) |
| 22 | + |
1 | 23 | ```bash
|
| 24 | +git clone https://github.com/emscripten-core/emsdk.git |
| 25 | +cd emsdk |
| 26 | +./emsdk install latest |
| 27 | +./emsdk activate latest |
| 28 | +# 这条指令每次启动都需要执行,为了使它永久生效,可将其添加到~/.bashrc |
| 29 | +source ./emsdk_env.sh |
| 30 | +``` |
| 31 | + |
| 32 | +下载源码并编译 |
| 33 | + |
| 34 | +```bash |
| 35 | +git clone https://github.com/AthBe1337/ncmdump-web.git |
| 36 | +cd ncmdump-web |
| 37 | +mkdir build && cd build |
2 | 38 | emcmake cmake .. -DCMAKE_BUILD_TYPE=Release
|
3 | 39 | emmake make -j$nproc
|
4 | 40 | ```
|
5 | 41 |
|
| 42 | +此时你将得到`ncmdump.js`和`ncmdump.wasm`,你可以将它集成到你的web页面中。 |
| 43 | + |
| 44 | +### 调用方法示例 |
| 45 | + |
| 46 | +`index.html`和`decrypt.worker.js`提供了一个简易的使用示例。以下是`decrypt.worker.js`。 |
| 47 | + |
| 48 | +```js |
| 49 | +import createModule from './wasm/ncmdump.js'; |
| 50 | + |
| 51 | +let wasmModule = null; |
| 52 | +let isWasmReady = false; |
| 53 | + |
| 54 | +createModule({ |
| 55 | + locateFile: (path) => path.endsWith('.wasm') ? './wasm/ncmdump.wasm' : path, |
| 56 | + onRuntimeInitialized: function() { |
| 57 | + wasmModule = this; |
| 58 | + isWasmReady = true; |
| 59 | + self.postMessage({ type: 'wasm-ready' }); |
| 60 | + } |
| 61 | +}).catch(err => { |
| 62 | + self.postMessage({ |
| 63 | + type: 'error', |
| 64 | + error: `WASM加载失败: ${err.message}` |
| 65 | + }); |
| 66 | +}); |
| 67 | + |
| 68 | +self.onmessage = async (e) => { |
| 69 | + const { type, payload } = e.data; |
| 70 | + |
| 71 | + if (type === 'decrypt') { |
| 72 | + try { |
| 73 | + if (!isWasmReady) { |
| 74 | + throw new Error("WASM模块尚未初始化完成"); |
| 75 | + } |
| 76 | + |
| 77 | + const fileData = new Uint8Array(payload.fileData); |
| 78 | + const baseName = payload.baseNameWithoutExtension || "output"; |
| 79 | + |
| 80 | + // 此处调用wasm函数 |
| 81 | + const resultView = wasmModule.decryptNCM(fileData, baseName); |
| 82 | + |
| 83 | + const result = new Uint8Array(resultView.length); |
| 84 | + result.set(resultView); |
| 85 | + |
| 86 | + self.postMessage({ |
| 87 | + type: 'decrypted', |
| 88 | + payload: { |
| 89 | + index: payload.index, |
| 90 | + result: result.buffer |
| 91 | + } |
| 92 | + }, [result.buffer]); |
| 93 | + |
| 94 | + } catch (error) { |
| 95 | + self.postMessage({ |
| 96 | + type: 'error', |
| 97 | + payload: { |
| 98 | + index: payload.index, |
| 99 | + error: error.message |
| 100 | + } |
| 101 | + }); |
| 102 | + } |
| 103 | + } |
| 104 | +}; |
| 105 | +``` |
| 106 | + |
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