NestJs 静态目录配置详解
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2020-11-30
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NestJs 静态目录配置详解静态目录配置详解
网上查看了很多文档，发现很多都是自己实现中间件来完成此功能，不仅浪费时间，而且增加了太多的代码量。实际上，nest
已经帮助我们封装好了相关功能。
1、查找线索、查找线索
由于官方文档没有做详细解释说明，那么我们可以从此框架底层入手：
我们知道，nestjs底层用的是express，那么express是通过什么来完成静态目录构建的：
serve-static
2、搜索源码、搜索源码
我们在项目搜索栏目中搜索“serve-static”会发现如下图：
也就是说，当我们在使用nest框架的时候，serve-static 会随之而构建好，那么我们直接参考其源码即可：依赖地址依赖地址
Nestjs 源码：
// Type definitions for serve-static 1.13
// Project: https://github.com/expressjs/serve-static
// Definitions by: Uros Smolnik <https://github.com/urossmolnik>
// Linus Unnebäck <https://github.com/LinusU>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 2.2
/* =================== USAGE ===================
import * as serveStatic from "serve-static";
app.use(serveStatic("public/ftp", {"index": ["default.html", "default.htm"]}))
=============================================== */
/// <reference types="express-serve-static-core" />
import * as express from "express-serve-static-core";
import * as m from "mime";
/**
* Create a new middleware function to serve files from within a given root directory.
* The file to serve will be determined by combining req.url with the provided root directory.
* When a file is not found, instead of sending a 404 response, this module will instead call next() to move on to the next
middleware, allowing for stacking and fall-backs.
*/
declare function serveStatic(root: string, options?: serveStatic.ServeStaticOptions): express.Handler;
declare namespace serveStatic {
var mime: typeof m;
interface ServeStaticOptions {
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