Node.js based on Express and Socket.io to achieve a simple chat program, can achieve instant chat

chat\app.js
....\bin\www
....\chat.js
....\node_modules\body-parser\HISTORY.md
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....\............\...........\LICENSE
....\............\...........\node_modules\bytes\History.md
....\............\...........\............\.....\index.js
....\............\...........\............\.....\package.json
....\............\...........\............\.....\Readme.md
....\............\...........\............\content-type\HISTORY.md
....\............\...........\............\............\index.js
....\............\...........\............\............\LICENSE
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....\............\...........\............\............\README.md
....\............\...........\............\depd\History.md
....\............\...........\............\....\index.js
....\............\...........\............\....\lib\compat\buffer-concat.js
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....\............\...........\............\....\LICENSE
....\............\...........\............\....\package.json
....\............\...........\............\....\Readme.md
....\............\...........\............\http-errors\HISTORY.md
....\............\...........\............\...........\index.js
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....\............\...........\............\...........\node_modules\inherits\inherits.js
....\............\...........\............\...........\............\........\inherits_browser.js
....\............\...........\............\...........\............\........\LICENSE
....\............\...........\............\...........\............\........\package.json
....\............\...........\............\...........\............\........\README.md
....\............\...........\............\...........\............\........\test.js
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....\............\...........\............\...........\............\........\LICENSE
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....\............\...........\............\iconv-lite\.npmignore
....\............\...........\............\..........\.travis.yml
....\............\...........\............\..........\Changelog.md
....\............\...........\............\..........\encodings\dbcs-codec.js
....\............\...........\............\..........\.........\dbcs-data.js
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....\............\...........\............\..........\.........\internal.js
....\............\...........\............\..........\.........\sbcs-codec.js
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