安装全局koa2：npm install -g koa2 -generator 创建一个koa2文件夹：koa2 -e koa2
进入koa2文件夹：cd koa2 安装npm模块：npm install
显示如下结果，可以看到，英文提示有一个漏洞需要修复
：
C:UsersAdministratorDesktopkoa2-1-1koa2>npm install
npm WARN deprecated swig@1.4.2: This package is no longer maintained
npm WARN deprecated ejs@2.3.4: Critical security bugs fixed in 2.5.5
> nodemon@1.18.6 postinstall C:UsersAdministratorDesktopkoa2-1-1koa2
ode_modules
odemon
> node bin/postinstall || exit 0
Love nodemon? You can now support the project via the open collective:
> https://opencollective.com/nodemon/donate
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modulesfsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
added 320 packages from 182 contributors and audited 2414 packages in 186.878s
found 1 low severity vulnerability
run `npm audit fix` to fix them, or `npm audit` for details
按照代码运行 npm audit fix
显示
C:UsersAdministratorDesktopkoa2-1-1koa2>npm audit fix
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modulesfsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
up to date in 13.094s
fixed 0 of 1 vulnerability in 2414 scanned packages
1 package update for 1 vuln involved breaking changes
(use `npm audit fix --force` to install breaking changes; or refer to `npm audit` for steps to fix these manually)
很明显没有解决
接着运行audit fix
显示：
Run npm install koa-onerror@4.1.0 to resolve 1 vulnerabilitySEMVER WARNING: Recommended action is a potentially breaking change
Low Regular Expression Denial of Service
Package uglify-js
Dependency of koa-onerror
Path koa-onerror > swig > uglify-js
More info https://nodesecurity.io/advisories/48
found 1 low severity vulnerability in 2414 scanned packages
运行
npm install koa-onerror@4.1.0
显示
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modulesfsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
+ koa-onerror@4.1.0
added 1 package from 1 contributor, removed 15 packages, updated 1 package and audited 2401 packages in 14.254s
found 0 vulnerabilities
ok