1.安裝 zlib
yarn add zlib
2.創建中間件
app/middleware/gzip.js
const isJSON = require("koa-is-json");
const zlib = require("zlib");
module.exports = (options) => {
return async function gzip(ctx, next) {
await next();
// 后續中間件執行完成后將響應體轉換成 gzip
let body = ctx.body;
if (!body) return;
// 支持 options.threshold
if (options.threshold && ctx.length < options.threshold) return;
if (isJSON(body)) body = JSON.stringify(body);
// 設置 gzip body,修正響應頭
const stream = zlib.createGzip();
stream.end(body);
ctx.body = stream;
ctx.set("Content-Encoding", "gzip");
};
};
3.配置
config/config.default.js
// add your middleware config here
config.middleware = ["gzip"];
config.gzip = {
threshold: 1024, // 小於 1k 的響應體不壓縮
};
.
