在windows下运行npm安装时出现类似FetchError: request to *** failed, reason: connect ECONNREFUSED 127.0.0.1:***的报错解决办法

报错

使用npm命令安装插件报错FetchError: request to https://registry.npm.taobao.org/pnpm failed, reason: connect ECONNREFUSED 127.0.0.1:31181。

C:\WINDOWS\system32>npm install -g pnpm
npm ERR! code ECONNREFUSED
npm ERR! errno ECONNREFUSED
npm ERR! FetchError: request to https://registry.npm.taobao.org/pnpm failed, reason: connect ECONNREFUSED 127.0.0.1:31181
npm ERR!     at ClientRequest.<anonymous> (C:\Users\xiaop\AppData\Roaming\nvm\v14.7.0\node_modules\npm\node_modules\node-fetch-npm\src\index.js:68:14)
npm ERR!     at ClientRequest.emit (events.js:314:20)
npm ERR!     at onerror (C:\Users\xiaop\AppData\Roaming\nvm\v14.7.0\node_modules\npm\node_modules\agent-base\index.js:101:9)
npm ERR!     at callbackError (C:\Users\xiaop\AppData\Roaming\nvm\v14.7.0\node_modules\npm\node_modules\agent-base\index.js:123:5)
npm ERR!     at processTicksAndRejections (internal/process/task_queues.js:93:5)
npm ERR!  FetchError: request to https://registry.npm.taobao.org/pnpm failed, reason: connect ECONNREFUSED 127.0.0.1:31181
npm ERR!     at ClientRequest.<anonymous> (C:\Users\xiaop\AppData\Roaming\nvm\v14.7.0\node_modules\npm\node_modules\node-fetch-npm\src\index.js:68:14)
npm ERR!     at ClientRequest.emit (events.js:314:20)
npm ERR!     at onerror (C:\Users\xiaop\AppData\Roaming\nvm\v14.7.0\node_modules\npm\node_modules\agent-base\index.js:101:9)
npm ERR!     at callbackError (C:\Users\xiaop\AppData\Roaming\nvm\v14.7.0\node_modules\npm\node_modules\agent-base\index.js:123:5)
npm ERR!     at processTicksAndRejections (internal/process/task_queues.js:93:5) {
npm ERR!   type: 'system',
npm ERR!   errno: 'ECONNREFUSED',
npm ERR!   code: 'ECONNREFUSED'
npm ERR! }
npm ERR!
npm ERR! If you are behind a proxy, please make sure that the
npm ERR! 'proxy' config is set properly.  See: 'npm help config'

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\xiaop\AppData\Roaming\npm-cache\_logs\2023-01-12T05_16_30_862Z-debug.log

原因

报错最后有个关键提示：If you are behind a proxy, please make sure that the 'proxy' config is set properly.  See: 'npm help config'

所以可能是npm没有配置好，出现了代理问题

解决

清理代理，并重新设置

//1.清理以前的代理设置：先通过以下代码查看代理设置，如果返回null那就不需要清理，直接跳到第三步
npm config get proxynpm config get https-proxy

//2.清除以前的代理设置
npm config set proxy null
npm config set https-proxy null
npm config delete proxy
npm config delete https-proxy

//3.重新设置，也可设置淘宝源 https://registry.npm.taobao.org/
npm config set registry http://registry.npmjs.org/
npm config set registry "http://registry.npmjs.org/"

好了，现在可以重新运行npn命令进行安装了