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46 lines
1.6 KiB
JavaScript
46 lines
1.6 KiB
JavaScript
/*
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使用方法：在终端运行“node main.js”，会将../go_dev/sample.wasm压缩为../package_lesson1/assets/sample.wasm.br。
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*/
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// 第三方的wasm版本brotli压缩和解压缩，安装方法：npm install wasm-brotli
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var brotli = require('wasm-brotli');
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// node自带的库
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var fs = require('fs');
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// node自带的库
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var util = require('util');
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// 将方法包装成promise风格，以使用async/await。
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const writeFileAsync = util.promisify(fs.writeFile);
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const readFileAsync = util.promisify(fs.readFile);
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// 压缩的示例
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async function compress(){
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const content = Buffer.from('Hello, world!', 'utf8');
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const compressedContent = await brotli.compress(content);
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await writeFileAsync('./hello_world.txt.br', compressedContent);
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console.log('compress completed')
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}
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// 解压缩的示例
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async function decompress(){
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const compressedContent = await readFileAsync('./hello_world.txt.br');
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const contenArray = await brotli.decompress(compressedContent);
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const content = Buffer.from(contenArray).toString('utf8');
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console.log('decompress result',content)
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}
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// 压缩文件的示例
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async function compressFile(){
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console.log('compress start...')
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var start = Date.now()
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const content = await readFileAsync('../go_dev/sample.wasm');
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const compressedContent = await brotli.compress(content);
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await writeFileAsync('../package_lesson1/assets/sample.wasm.br', compressedContent);
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var end = Date.now()-start
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console.log('compress completed. cost',end/1000,'seconds.')
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}
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compressFile()
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