我正在从我找到的示例构建一个Web应用程序，并在我的输出中收到警告“DeprecationWarning：Buffer（）由于安全性和可用性问题而被弃用。请使用Buffer.alloc（），Buffer.allocUnsafe（）或者而不是Buffer.from（）方法。“
在package-lock.json文件中，它引用了更安全的缓冲区，我的研究中用于升级缓冲区，但我假设这可能导致问题。以下是文件中引用缓冲区的部分：
"asn1": {
"version": "0.2.4",
"resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
"integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
"requires": {
"safer-buffer": "~2.1.0"
}
"bl": {
"version": "2.2.0",
"resolved": "https://registry.npmjs.org/bl/-/bl-2.2.0.tgz",
"integrity": "sha512-wbgvOpqopSr7uq6fJrLH8EsvYMJf9gzfo2jCsL2eTy75qXPukA4pCgHamOQkZtY5vmfVtjB+P3LNlMHW5CEZXA==",
"requires": {
"readable-stream": "^2.3.5",
"safe-buffer": "^5.1.1"
}
"buffer-equal-constant-time": {
"version": "1.0.1",
"resolved": "https://registry.npmjs.org/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz",
"integrity": "sha1-+OcRMvf/5uAaXJaXpMbz5I1cyBk="
},
"ecc-jsbn": {
"version": "0.1.2",
"resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz",
"integrity": "sha1-OoOpBOVDUyh4dMVkt1SThoSamMk=",
"requires": {
"jsbn": "~0.1.0",
"safer-buffer": "^2.1.0"
}
},
"ecdsa-sig-formatter": {
"version": "1.0.11",
"resolved": "https://registry.npmjs.org/ecdsa-sig-formatter/-/ecdsa-sig-formatter-1.0.11.tgz",
"integrity": "sha512-nagl3RYrbNv6kQkeJIpt6NJZy8twLB/2vtz6yN9Z4vRKHN4/QZJIEbqohALSgwKdnksuY3k5Addp5lg8sVoVcQ==",
"requires": {
"safe-buffer": "^5.0.1"
}
},
"express": {
"version": "4.16.4",
"resolved": "https://registry.npmjs.org/express/-/express-4.16.4.tgz",
"integrity": "sha512-j12Uuyb4FMrd/qQAm6uCHAkPtO8FDTRJZBDd5D2KOL2eLaz1yUNdUB/NOIyq0iU4q4cFarsUCrnFDPBcnksuOg==",
"requires": {
"accepts": "~1.3.5",
"array-flatten": "1.1.1",
"body-parser": "1.18.3",
"content-disposition": "0.5.2",
"content-type": "~1.0.4",
"cookie": "0.3.1",
"cookie-signature": "1.0.6",
"debug": "2.6.9",
"depd": "~1.1.2",
"encodeurl": "~1.0.2",
"escape-html": "~1.0.3",
"etag": "~1.8.1",
"finalhandler": "1.1.1",
"fresh": "0.5.2",
"merge-descriptors": "1.0.1",
"methods": "~1.1.2",
"on-finished": "~2.3.0",
"parseurl": "~1.3.2",
"path-to-regexp": "0.1.7",
"proxy-addr": "~2.0.4",
"qs": "6.5.2",
"range-parser": "~1.2.0",
"safe-buffer": "5.1.2",
"send": "0.16.2",
"serve-static": "1.13.2",
"setprototypeof": "1.1.0",
"statuses": "~1.4.0",
"type-is": "~1.6.16",
"utils-merge": "1.0.1",
"vary": "~1.1.2"
}
"iconv-lite": {
"version": "0.4.23",
"resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.23.tgz",
"integrity": "sha512-neyTUVFtahjf0mB3dZT77u+8O0QB89jFdnBkd5P1JgYPbPaia3gXXOVL2fq8VyU2gMMD7SaN7QukTB/pmXYvDA==",
"requires": {
"safer-buffer": ">= 2.1.2 < 3"
}
},
"jwa": {
"version": "1.4.1",
"resolved": "https://registry.npmjs.org/jwa/-/jwa-1.4.1.tgz",
"integrity": "sha512-qiLX/xhEEFKUAJ6FiBMbes3w9ATzyk5W7Hvzpa/SLYdxNtng+gcurvrI7TbACjIXlsJyr05/S1oUhZrc63evQA==",
"requires": {
"buffer-equal-constant-time": "1.0.1",
"ecdsa-sig-formatter": "1.0.11",
"safe-buffer": "^5.0.1"
}
},
"jws": {
"version": "3.2.2",
"resolved": "https://registry.npmjs.org/jws/-/jws-3.2.2.tgz",
"integrity": "sha512-YHlZCB6lMTllWDtSPHz/ZXTsi8S00usEV6v1tjq8tOUZzw7DpSDWVXjXDre6ed1w/pd495ODpHZYSdkRTsa0HA==",
"requires": {
"jwa": "^1.4.1",
"safe-buffer": "^5.0.1"
}
},
"mysql": {
"version": "2.16.0",
"resolved": "https://registry.npmjs.org/mysql/-/mysql-2.16.0.tgz",
"integrity": "sha512-dPbN2LHonQp7D5ja5DJXNbCLe/HRdu+f3v61aguzNRQIrmZLOeRoymBYyeThrR6ug+FqzDL95Gc9maqZUJS+Gw==",
"requires": {
"bignumber.js": "4.1.0",
"readable-stream": "2.3.6",
"safe-buffer": "5.1.2",
"sqlstring": "2.3.1"
}
},
"readable-stream": {
"version": "2.3.6",
"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
"integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
"requires": {
"core-util-is": "~1.0.0",
"inherits": "~2.0.3",
"isarray": "~1.0.0",
"process-nextick-args": "~2.0.0",
"safe-buffer": "~5.1.1",
"string_decoder": "~1.1.1",
"util-deprecate": "~1.0.1"
}
},
"request": {
"version": "2.88.0",
"resolved": "https://registry.npmjs.org/request/-/request-2.88.0.tgz",
"integrity": "sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==",
"requires": {
"aws-sign2": "~0.7.0",
"aws4": "^1.8.0",
"caseless": "~0.12.0",
"combined-stream": "~1.0.6",
"extend": "~3.0.2",
"forever-agent": "~0.6.1",
"form-data": "~2.3.2",
"har-validator": "~5.1.0",
"http-signature": "~1.2.0",
"is-typedarray": "~1.0.0",
"isstream": "~0.1.2",
"json-stringify-safe": "~5.0.1",
"mime-types": "~2.1.19",
"oauth-sign": "~0.9.0",
"performance-now": "^2.1.0",
"qs": "~6.5.2",
"safe-buffer": "^5.1.2",
"tough-cookie": "~2.4.3",
"tunnel-agent": "^0.6.0",
"uuid": "^3.3.2"
}
},
"safe-buffer": {
"version": "5.1.2",
"resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
"integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
},
"safer-buffer": {
"version": "2.1.2",
"resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
"integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
},
"sshpk": {
"version": "1.16.1",
"resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
"integrity": "sha512-HXXqVUq7+pcKeLqqZj6mHFUMvXtOJt1uoUx09pFW6011inTMxqI8BA8PM95myrIyyKwdnzjdFjLiE6KBPVtJIg==",
"requires": {
"asn1": "~0.2.3",
"assert-plus": "^1.0.0",
"bcrypt-pbkdf": "^1.0.0",
"dashdash": "^1.12.0",
"ecc-jsbn": "~0.1.1",
"getpass": "^0.1.1",
"jsbn": "~0.1.0",
"safer-buffer": "^2.0.2",
"tweetnacl": "~0.14.0"
}
},
"string_decoder": {
"version": "1.1.1",
"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
"integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
"requires": {
"safe-buffer": "~5.1.0"
}
},
"tunnel-agent": {
"version": "0.6.0",
"resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
"integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
"requires": {
"safe-buffer": "^5.0.1"
}
},
任何人都知道我需要做什么来“升级”这些引用，所以我没有收到折旧警告？
就像警告说的那样
DeprecationWarning：由于安全性和可用性问题，不推荐使用Buffer（）。请改用Buffer.alloc（），Buffer.allocUnsafe（）或Buffer.from（）方法。
避免弃用警告。您需要在代码中找到新的Buffer（）方法并将其替换为新方法。例如在extend-node.js文件（NodeTaskApp-master\node_modules\iconv-lite\lib）中，第13行：
iconv.supportsNodeEncodingsExtension = !(Buffer.from || new Buffer(0) instanceof Uint8Array);