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koa2-static2

v1.0.0

Published

基于koa-static中间件扩展带协商缓存的中间件

Downloads

6

Readme

koa2-static2

项目介绍

  • 基于 koa2、koa-static 中间件扩展带协商缓存的中间件

功能

  • 遵循 HTTP 协议缓存机制
  • 基于及集成 koa-static
  • 支持协商缓存
  • 可配置开启文件类型(默认禁止 HTML 文件缓存)

安装

  • (c)npm install koa2-static2 -D

使用

基础使用

默认开启协商缓存并禁止 HTML 文件缓存,在静态资源中每次都会发送请求检查服务端是否有更新

const koa2Static2 = require('koa2-static2');

const Koa = require('koa');

const path = require('path');

const staticPath = path.resolve(__dirname, './static');

const app = new Koa();

koa2Static2.install(app, staticPath);

app.listen(3000);

console.log('http://localhost:3000');
强制缓存优先(推荐)

浏览器先检测是否已经开启强制缓存,在强制缓存时间过期之后再发送请求检查服务端是否有更新

koa2Static2.install(app, staticPath, {
  maxAge: 10000
});
过滤指定资源

通过配置项指定 excludeExtensionCache 指定需要被忽略的文件类型,由于直接覆盖默认配置如果禁止 html 类型扔需手动传入

koa2Static2.install(app, staticPath, {
  maxAge: 10000,
  excludeExtensionCache: ['html', 'css']
});
koa-static 源用法

koa2Static2 本身是一个函数,基于 koa-static ,所以 api 保持一致

app.use(koa2Static2(staticPath, options));

API

  • function
    • koa2Static2
      • param 和 koa-static 一致
      • return
        • function <Function>
  • methods
    • install
      • param
        • koaApp <Object> koa 实例
        • staticPath <String> 静态资源目录、同 koa-static 第一个参数
        • options <Object> 同 koa-static 第二个参数
          • excludeExtensionCache 继承参数、参考上面示例
          • maxage
          • setHeaders
          • ...
      • return
        • void

其他

  • 若使用 setHeaders 中设置 Cache-ControlPragmaLast-ModifiedEtag 将无效

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