#鸿蒙通关秘籍#如何在HarmonyOS中使用CodeCache加速JavaScript资源？

要加速JavaScript资源的加载和执行，可以通过响应头中的“ResponseDataID”字段来自动生成CodeCache。在拦截请求时，构建响应数据并设置该字段，以启用CodeCache功能。

ets import { webview } from '@kit.ArkWeb';

@Entry @Component struct WebComponent { controller: webview.WebviewController = new webview.WebviewController(); responseResource: WebResourceResponse = new WebResourceResponse(); @State jsData: string = 'let text_msg = "the modified content:version 0000000000001";\n...';

build() { Column() { Web({ src: $rawfile('index.html'), controller: this.controller }) .onInterceptRequest((event) => { if (event?.request.getRequestUrl() === 'https://www.example.com/test.js') { this.responseResource.setResponseHeader([ { headerKey: "ResponseDataID", headerValue: "0000000000001" } ]); this.responseResource.setResponseData(this.jsData); this.responseResource.setResponseEncoding('utf-8'); this.responseResource.setResponseMimeType('application/javascript'); this.responseResource.setResponseCode(200); this.responseResource.setReasonMessage('OK'); return this.responseResource; } return null; }) } } }