chore: enforce explicit Buffer import and add lint rule (#6525)

Signed-off-by: Shivam Sharma <[email protected]>

Author: shivarm

.eslintrc.yml

@@ -8,3 +8,7 @@ rules:
   indent: [error, 2, { MemberExpression: "off", SwitchCase: 1 }]
   no-trailing-spaces: error
   no-unused-vars: [error, { vars: all, args: none, ignoreRestSiblings: true }]
+  no-restricted-globals:
+    - error
+    - name: Buffer
+      message: Use `import { Buffer } from "node:buffer"` instead of the global Buffer.

lib/response.js

@@ -31,6 +31,7 @@ var send = require('send');
 var extname = path.extname;
 var resolve = path.resolve;
 var vary = require('vary');
+const { Buffer } = require('node:buffer');
 
 /**
  * Response prototype.

lib/utils.js

@@ -19,6 +19,7 @@ var mime = require('mime-types')
 var proxyaddr = require('proxy-addr');
 var qs = require('qs');
 var querystring = require('querystring');
+const { Buffer } = require('node:buffer');
 
 /**
  * A list of lowercased HTTP methods that are supported by Node.js.

test/express.json.js

@@ -2,6 +2,7 @@
 
 var assert = require('node:assert')
 var AsyncLocalStorage = require('node:async_hooks').AsyncLocalStorage
+const { Buffer } = require('node:buffer');
 
 var express = require('..')
 var request = require('supertest')

test/express.raw.js

@@ -5,6 +5,7 @@ var AsyncLocalStorage = require('node:async_hooks').AsyncLocalStorage
 
 var express = require('..')
 var request = require('supertest')
+const { Buffer } = require('node:buffer');
 
 describe('express.raw()', function () {
   before(function () {

test/express.static.js

@@ -3,6 +3,8 @@
 var assert = require('node:assert')
 var express = require('..')
 var path = require('node:path')
+const { Buffer } = require('node:buffer');
+
 var request = require('supertest')
 var utils = require('./support/utils')
 

test/express.text.js

@@ -2,7 +2,7 @@
 
 var assert = require('node:assert')
 var AsyncLocalStorage = require('node:async_hooks').AsyncLocalStorage
-
+const { Buffer } = require('node:buffer');
 var express = require('..')
 var request = require('supertest')
 

test/express.urlencoded.js

@@ -2,6 +2,7 @@
 
 var assert = require('node:assert')
 var AsyncLocalStorage = require('node:async_hooks').AsyncLocalStorage
+const { Buffer } = require('node:buffer');
 
 var express = require('..')
 var request = require('supertest')

test/res.attachment.js

@@ -1,5 +1,7 @@
 'use strict'
 
+const { Buffer } = require('node:buffer');
+
 var express = require('../')
   , request = require('supertest');
 

test/res.download.js

@@ -3,6 +3,7 @@
 var after = require('after');
 var assert = require('node:assert')
 var AsyncLocalStorage = require('node:async_hooks').AsyncLocalStorage
+const { Buffer } = require('node:buffer');
 
 var express = require('..');
 var path = require('node:path')