获取模拟器错误
P粉447495069
2023-09-01 20:53:31
<p>我一直在尝试对我在网上找到的 GBA 模拟器 (https://gba.44670.org/) 进行逆向工程，并使用 HTML 提取器来尝试复制它。我希望它能够离线工作，所以我将所有脚本下载到我的计算机上，并在那里运行。但是，此后，“选择文件”按钮不再出现，取而代之的是“正在加载，请稍候...”文本行。深入研究代码，我发现它与 WASM 有关。代码如下：</p>
<pre class="brush:php;toolbar:false;"><div id="wasm-loading">
Loading, please wait...
</div>
<div id="select-rom" hidden>
<input type="file" id="romFile" onchange="onFileSelected()" hidden /></p>
<button onclick="$id('romFile').click()" id="btn-choose">Choose File...</button>
</div></pre>
<p>代码中对 WASM 的其他提及位于 .js 文件 app.js 中：</p>
<pre class="brush:php;toolbar:false;">function wasmReady() {
romBuffer = Module._emuGetSymbol(1)
var ptr = Module._emuGetSymbol(2)
wasmSaveBuf = Module.HEAPU8.subarray(ptr, ptr + wasmSaveBufLen)
ptr = Module._emuGetSymbol(3)
imgFrameBuffer = new Uint8ClampedArray(Module.HEAPU8.buffer).subarray(ptr, ptr + 240 * 160 * 4)
idata = new ImageData(imgFrameBuffer, 240, 160)
isWasmReady = true
document.getElementById('wasm-loading').hidden = true
document.getElementById('select-rom').hidden = false
}</pre>
<p>我期望一旦我下载了脚本，它就会像平常一样工作。我的意思是，它仍然可以访问它需要的脚本，对吧？我尝试通过更改 <code>document.getElementById('select-rom').hidden = false</code> 中的 true/false 语句来隐藏文本，反之亦然，但似乎没有任何效果。有任何想法吗？提前致谢。</p>
<p>（顺便说一句，我正在 vscode.dev 中查找文件路径。它看起来像这样： <code><script src="/Scripts/44gba.js"></script> <script src="/Scripts /app.js"></script> <script src="/Scripts/localforage.js"></script> <script src=/Scripts/pako.min.js></script></code>
）</p>
要使用脚本将应用程序保留在本地，请记住两件事：
也就是说，复制您在响应中得到的相同 HTML (https://gba.44670.org/ ），这将保留文件结构。这是我得到的内容（
index.html）：<html lang="en"><head> <!-- Required meta tags --> <meta charset="utf-8"> <meta name="apple-mobile-web-app-capable" content="yes"> <meta name="apple-mobile-web-app-status-bar-style" content="black"> <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height"> <link rel="apple-touch-icon" href="icon.png"> <link rel="manifest" href="manifest.json"> <title>44VBA</title> </head> <body> <style> a, a:visited { color: white; } html, body { position: fixed; overflow: hidden; -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; touch-action: none; cursor: inherit; } body { background-color: #000000; color: #FFFFFF; padding: 0; margin: 0; width: 100vw; height: 100vh; font-family: 'Myriad Set Pro', 'Helvetica Neue', Helvetica, Arial, sans-serif; } hr { color: white; } button { border: 2px solid white; background: transparent; color: white; padding: .5em; } .vk-round { text-align: center; vertical-align: middle; border-radius: 50%; display: inline-block; } .vk { color: rgba(0, 0, 0, 0.2); background-color: rgba(255, 255, 255, 0.25); position: absolute; z-index: 1; text-align: center; vertical-align: middle; display: inline-block; } .vk-hide { background-color: transparent !important } .vk-touched { background-color: rgba(255, 255, 255, 0.75) !important } .menu { background: rgb(32, 43, 56); position: absolute; left: 0; top: 0; width: 100vw; height: 100vh; z-index: 999; } #gba-canvas { position: absolute; z-index: -1; } #vk-layer { position: absolute; left: 0; top: 0; width: 100%; height: 100%; z-index: 3; touch-action: none; } #msg-layer { position: absolute; left: 0; width: 100%; top: 40vh; background: rgba(0, 0, 0, 0.5); z-index: 2; } textarea { background: transparent; color: #fff; border: 2px solid white; } /* textarea placeholder */ textarea::placeholder { color: #666; } </style> <div id="pause-menu" class="menu" style="background: rgba(32,43,56,0.7);" hidden=""> <button onclick="setPauseMenu(false)"> ← Back </button> <hr> Savegame management:<br> <button onclick="savBackupBtn()">Backup</button> <input type="file" id="sav-file" onchange="savRestoreBtn()" hidden=""> <button onclick="$id('sav-file').click()">Restore</button> <hr> <label for="cfg-scale-mode">Screen filter:</label> <select id="cfg-scale-mode"> <option value="0">Pixelated</option> <option value="1">Smooth</option> <option value="2">XBRZ</option> </select><br> <input type="checkbox" id="cfg-mute"> <label for="cfg-mute">Mute Sound</label><br> <input type="checkbox" id="cfg-turbo"> <label for="cfg-turbo">Turbo mode</label><br> <div id="div-cht"> Cheat Codes(backup your savegame before using it):<br> <textarea id="txt-code" style="width:100%" rows="10" placeholder="Cheat code: GamesharkAdv: XXXXXXXX YYYYYYYY CodeBreaker: XXXXXXXX YYYY"></textarea><br> <button onclick="chtSaveBtn()">Save Cheat Codes</button> </div> <hr> Cloud Save:<span id="span-cloud-id"></span><br> <button onclick="dpOnConnectButtonClicked()" id="btn-dp-connect">Connect Dropbox</button><br> <button onclick="dpManualBtn(true)">↑ Upload</button>|<button onclick="dpManualBtn(false)">↓ Download</button><br> </div> <div id="welcome" class="menu"> <h1 id="title">44VBA</h1> <hr> <div id="wasm-loading" hidden=""> Loading, please wait... </div> <div id="select-rom"> <input type="file" id="romFile" onchange="onFileSelected()" hidden=""><p></p> <button onclick="$id('romFile').click()" id="btn-choose">Choose File...</button> </div> <hr> Ver. 20230107 | <a href="https://github.com/44670/44vba">GitHub</a> <p> Your files are processed locally and won't be uploaded to any server.<br> This software should not be used to play games you have not legally obtained.<br> "GBA", "Game Boy Advance" are trademarks of Nintendo Co.,Ltd, This site is not associated with Nintendo in any way. </p> <div id="ios-hint" hidden=""> Due to iOS limitations, please open this site(https://gba.44670.org) in <b>Safari</b>, and add it to your <b>Home Screen</b> by <b>Share Menu</b> to continue. <p style="text-align: center;">⬇⬇⬇</p> </div> </div> <div id="msg-layer" hidden=""> <p id="msg-text">Gamepad disconnected.</p> </div> <div id="vk-layer" hidden=""> <div class="vk-rect vk" data-k="menu" style="top: 25px; left: 591px; width: 150px; height: 25px; font-size: 35px; line-height: 25px;">Menu</div> <div class="vk-rect vk" data-k="turbo" style="top: 25px; left: 0px; width: 150px; height: 25px; font-size: 35px; line-height: 25px;">F.F.</div> <div class="vk-rect vk" data-k="l" style="top: 75px; left: 0px; width: 150px; height: 50px; font-size: 35px; line-height: 50px;">L</div> <div class="vk-rect vk" data-k="r" style="top: 75px; left: 591px; width: 150px; height: 50px; font-size: 35px; line-height: 50px;">R</div> <div class="vk-round vk" data-k="a" style="top: 175px; left: 676px; width: 65px; height: 65px; font-size: 35px; line-height: 65px;">A</div> <div class="vk-round vk" data-k="b" style="top: 200px; left: 585px; width: 65px; height: 65px; font-size: 35px; line-height: 65px;">B</div> <div class="vk-rect vk" data-k="select" style="top: 605px; left: 205.5px; width: 150px; height: 25px; font-size: 35px; line-height: 25px;">Select</div> <div class="vk-rect vk" data-k="start" style="top: 605px; left: 385.5px; width: 150px; height: 25px; font-size: 35px; line-height: 25px;">Start</div> <div class=" vk" data-k="left" style="top: 200px; left: 0px; width: 50px; height: 50px; font-size: 35px; line-height: 50px;">←</div> <div class=" vk" data-k="right" style="top: 200px; left: 100px; width: 50px; height: 50px; font-size: 35px; line-height: 50px;">→</div> <div class=" vk" data-k="up" style="top: 150px; left: 50px; width: 50px; height: 50px; font-size: 35px; line-height: 50px;">↑</div> <div class=" vk" data-k="down" style="top: 250px; left: 50px; width: 50px; height: 50px; font-size: 35px; line-height: 50px;">↓</div> <div class=" vk vk-hide" style="top: 150px; left: 0px; width: 50px; height: 50px; font-size: 35px; line-height: 50px;" data-k="ul"></div> <div class=" vk vk-hide" style="top: 150px; left: 100px; width: 50px; height: 50px; font-size: 35px; line-height: 50px;" data-k="ur"></div> <div class=" vk vk-hide" style="top: 250px; left: 0px; width: 50px; height: 50px; font-size: 35px; line-height: 50px;" data-k="dl"></div> <div class=" vk vk-hide" style="top: 250px; left: 100px; width: 50px; height: 50px; font-size: 35px; line-height: 50px;" data-k="dr"></div> </div> <canvas width="240" height="160" id="gba-canvas" style="width: 741px; height: 494px; left: 0px; image-rendering: pixelated;"></canvas> <script src="pako.min.js"></script> <script src="localforage.js"></script> <script src="app.js"></script> <script src="build/44gba.js"></script> </body></html>然后您可以看到脚本路径，您将按照该路径创建文件：
此外，您还需要下载 WASM 文件（压缩后 651KB，未压缩 7.7MB）。您可以在此处下载压缩包（您可以在开发工具的“网络”选项卡中找到它）：https ://gba.44670.org/build/44gba.wasm
最后，下载所有必要的文件（如果需要，还可以下载图标和图片，但不是必需的）：
您将得到如下所示的结构：
现在，如果您可以从浏览器中停用 CORS，那就太好了。但如果没有，您必须从本地 HTTP 服务器提供服务。一种选择是安装 NPM 包： https://www.npmjs.com/package/http-服务器，运行
npm install --global http-server。之后，只需导航到终端中的项目目录并启动服务器：您将看到正确的屏幕并加载 ROM，然后就完成了。
编辑：通过简单的 Hack 解决本地 CORS 问题
由于我知道您现在使用的是 ChromeOS，并且从技术上讲还不知道如何使用 Node、NPM 和 HTTP-Server 来处理它，因此我为您做了一些修改，并将 WASM 二进制内容直接放入 build/44gba.js，并在函数 readBinary 上返回该二进制内容，以便绕过 CORS 问题。您可以直接启动index.html。以下是新
build/44gba.js文件的链接，只需将其内容替换为以下文件：https://sendeyo.com/en/b02f94b524，你们都很好。以下是更改内容：const wasmData = `0061 736d 0100 0000 01c9 011e 6001 7f00 6002 7f7f 0060 0000 6001 7f01 7f60 037f ... ... ... ... ... ... ... ... 0a00 41c0 8106 0b04 7064 6202`; // other codes ... readBinary = filename=>{ var ret = new Uint8Array(wasmData); return ret; /* var ret = read_(filename, true); if (!ret.buffer) { ret = new Uint8Array(ret) } return ret */ } // other codes ...