前提：我是用的是MAC系统，不知道使用windows系统是否也可以

react-box 项目构建

localhost:ReactDapp liyuechun$ truffle unbox react-boxStarting unbox...
=================✔ Preparing to download box
✖ Downloading
Unbox failed!
RequestError: Error: connect ECONNREFUSED 0.0.0.0:443at new RequestError (/usr/local/lib/node_modules/truffle/build/webpack:/node_modules/request-promise-core/lib/errors.js:14:1)at Request.plumbing.callback (/usr/local/lib/node_modules/truffle/build/webpack:/node_modules/request-promise-core/lib/plumbing.js:87:1)at Request.RP$callback [as _callback] (/usr/local/lib/node_modules/truffle/build/webpack:/node_modules/request-promise-core/lib/plumbing.js:46:1)at self.callback (/usr/local/lib/node_modules/truffle/build/webpack:/node_modules/request/request.js:185:1)at Request.emit (events.js:189:13)at Request.onRequestError (/usr/local/lib/node_modules/truffle/build/webpack:/node_modules/request/request.js:881:1)at ClientRequest.emit (events.js:189:13)at TLSSocket.socketErrorListener (_http_client.js:392:9)at TLSSocket.emit (events.js:189:13)at emitErrorNT (internal/streams/destroy.js:82:8)at emitErrorAndCloseNT (internal/streams/destroy.js:50:3)at process._tickCallback (internal/process/next_tick.js:63:19)
Truffle v5.1.29 (core: 5.1.29)
Node v10.15.3

解决办法

• 打开链接 请点我 ，下载demo，拷贝解压文件夹里面的hosts文件
• 打开终端，输入open /etc
• 将hosts粘贴到etc文件夹，替换掉原来的hosts文件。

localhost:ReactDapp liyuechun$ truffle unbox react-boxStarting unbox...
=================✔ Preparing to download box
✔ Downloading
✔ cleaning up temporary files
✔ Setting up boxUnbox successful, sweet!Commands:Compile:              truffle compileMigrate:              truffle migrateTest contracts:       truffle testTest dapp:            cd client && npm testRun dev server:       cd client && npm run startBuild for production: cd client && npm run build

参考链接