socket.io 在使用 npm 安装时显示依赖警告答案

【问题标题】：socket.io shows dependency warnings when installing using npmsocket.io 在使用 npm 安装时显示依赖警告
【发布时间】：2017-11-27 17:31:59
【问题描述】：

我正在尝试使用 npm 安装 socket.io，但是每当我运行时

npm run build:dll

我收到警告/错误：

Building the Webpack DLL...
Hash: e4aec7398e03ac59c7bf
Version: webpack 3.5.5
Time: 3456ms
                      Asset     Size  Chunks                    Chunk Names
reactBoilerplateDeps.dll.js  4.55 MB       0  [emitted]  [big]  reactBoilerplateDeps
chunk    {0} reactBoilerplateDeps.dll.js (reactBoilerplateDeps) 3.84 MB [entry] [rendered]

WARNING in ./node_modules/socket.io/lib/index.js
108:11-32 Critical dependency: the request of a dependency is an expression

WARNING in ./node_modules/ws/lib/BufferUtil.js
Module not found: Error: Can't resolve 'bufferutil' in '/Users/***/node_modules/ws/lib'
 @ ./node_modules/ws/lib/BufferUtil.js 35:21-42
 @ ./node_modules/ws/lib/Sender.js
 @ ./node_modules/ws/index.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/ws/lib/Validation.js
Module not found: Error: Can't resolve 'utf-8-validate' in '/Users/***/node_modules/ws/lib'
 @ ./node_modules/ws/lib/Validation.js 10:22-47
 @ ./node_modules/ws/lib/Receiver.js
 @ ./node_modules/ws/index.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/uws/uws_darwin_46.node
Module parse failed: /Users/***/node_modules/uws/uws_darwin_46.node Unexpected character '�' (1:0)
You may need an appropriate loader to handle this file type.
(Source code omitted for this binary file)
 @ ./node_modules/uws ^\.\/uws_.*$
 @ ./node_modules/uws/uws.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/uws/uws_darwin_47.node
Module parse failed: /Users/***/node_modules/uws/uws_darwin_47.node Unexpected character '�' (1:0)
You may need an appropriate loader to handle this file type.
(Source code omitted for this binary file)
 @ ./node_modules/uws ^\.\/uws_.*$
 @ ./node_modules/uws/uws.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/uws/uws_darwin_48.node
Module parse failed: /Users/***/node_modules/uws/uws_darwin_48.node Unexpected character '�' (1:0)
You may need an appropriate loader to handle this file type.
(Source code omitted for this binary file)
 @ ./node_modules/uws ^\.\/uws_.*$
 @ ./node_modules/uws/uws.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/uws/uws_darwin_51.node
Module parse failed: /Users/***/node_modules/uws/uws_darwin_51.node Unexpected character '�' (1:0)
You may need an appropriate loader to handle this file type.
(Source code omitted for this binary file)
 @ ./node_modules/uws ^\.\/uws_.*$
 @ ./node_modules/uws/uws.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/uws/uws_darwin_57.node
Module parse failed: /Users/***/node_modules/uws/uws_darwin_57.node Unexpected character '�' (1:0)
You may need an appropriate loader to handle this file type.
(Source code omitted for this binary file)
 @ ./node_modules/uws ^\.\/uws_.*$
 @ ./node_modules/uws/uws.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/uws/uws_linux_46.node
Module parse failed: /Users/***/node_modules/uws/uws_linux_46.node Unexpected character '' (1:0)
You may need an appropriate loader to handle this file type.
(Source code omitted for this binary file)
 @ ./node_modules/uws ^\.\/uws_.*$
 @ ./node_modules/uws/uws.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/uws/uws_linux_47.node
Module parse failed: /Users/***/node_modules/uws/uws_linux_47.node Unexpected character '' (1:0)
You may need an appropriate loader to handle this file type.
(Source code omitted for this binary file)
 @ ./node_modules/uws ^\.\/uws_.*$
 @ ./node_modules/uws/uws.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/uws/uws_linux_48.node
Module parse failed: /Users/***/node_modules/uws/uws_linux_48.node Unexpected character '' (1:0)
You may need an appropriate loader to handle this file type.
(Source code omitted for this binary file)
 @ ./node_modules/uws ^\.\/uws_.*$
 @ ./node_modules/uws/uws.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/uws/uws_linux_51.node
Module parse failed: /Users/***/node_modules/uws/uws_linux_51.node Unexpected character '' (1:0)
You may need an appropriate loader to handle this file type.
(Source code omitted for this binary file)
 @ ./node_modules/uws ^\.\/uws_.*$
 @ ./node_modules/uws/uws.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/uws/uws_win32_48.node
Module parse failed: /Users/***/node_modules/uws/uws_win32_48.node Unexpected character '�' (1:2)
You may need an appropriate loader to handle this file type.
(Source code omitted for this binary file)
 @ ./node_modules/uws ^\.\/uws_.*$
 @ ./node_modules/uws/uws.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

WARNING in ./node_modules/uws/uws_win32_51.node
Module parse failed: /Users/***/node_modules/uws/uws_win32_51.node Unexpected character '�' (1:2)
You may need an appropriate loader to handle this file type.
(Source code omitted for this binary file)
 @ ./node_modules/uws ^\.\/uws_.*$
 @ ./node_modules/uws/uws.js
 @ ./node_modules/engine.io/lib/server.js
 @ ./node_modules/engine.io/lib/engine.io.js
 @ ./node_modules/socket.io/lib/index.js
 @ dll reactBoilerplateDeps

ERROR in ./node_modules/socket.io/lib/index.js
Module not found: Error: Can't resolve 'fs' in '/Users/***/node_modules/socket.io/lib'
 @ ./node_modules/socket.io/lib/index.js 7:11-24 9:13-26
 @ dll reactBoilerplateDeps

我已经厌倦了将 node: { fs: 'empty' } 添加到我的 webpack conf 中，并删除了 node_modules 文件夹，但是它并没有解决它。这个问题现在也出现在我更新的一个旧项目中。

我找到了有类似问题的人，但是没有一个修复程序起作用。

 "socket.io": "^2.0.4",
 "webpack": "3.5.5",

我厌倦了安装 socket.io-client 并且出现了更多错误（编辑：我似乎需要两个都用于 react 应用程序）。

我的 webpack 配置与 react 样板相同。如果有帮助，请使用 Mac 和 Webstorm。

【问题讨论】：

socket.io-client 不应给您任何与节点相关的错误。尝试擦除 node_modules、package.lock 并在没有 socket.io 的情况下重新安装仅客户端版本
还有你在运行什么版本的 npm
我删除了socket.io，只安装了socket.io-client，并删除了package.lock。完美运行 - 谢谢！
我不确定是否要使用 socket.io-client 版本？
你在使用 webpack 构建服务器端应用吗？

标签： reactjs webpack socket.io

【解决方案1】：

我发现我曾经使用过：

node: {
        fs: 'empty',
}

在错误的地方，需要添加：

noParse: /ws/,
externals: ['ws'],

到 webpack.base.babel

这清除了所有错误

【讨论】：

【解决方案2】：

使用Webpack node modules externals 忽略来自 node_module 目录和内置模块的所有模块

var nodeExternals = require('webpack-node-externals'); ...

module.exports = {
    ...
    target: 'node', // in order to ignore built-in modules like path, fs, etc. 
    externals: [nodeExternals()], // in order to ignore all modules in node_modules folder 
    ...
};

【讨论】：