How to fix DeprecationWarning: Buffer() - node.js

Question

I am building a web app from a sample I found, and get a warning in my output "DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead."
In the package-lock.json file it refers to safer-buffer, which from my research is what is used to upgrade the buffer, however I am assuming this may be causing the issue. Here are the parts of the file which refer to buffer:
"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"
}
},
Anyone know what I need to do to "upgrade" these references so I am not getting the depreciation warning?

Answer 1

Just like the warning said
DeprecationWarning: Buffer() is deprecated due to security and
usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(),
or Buffer.from() methods instead.
To avoid the depreciation warning. You need to find out the new Buffer() methods in your codes and replace them with a new one. Such as in the extend-node.js file(NodeTaskApp-master\node_modules\iconv-lite\lib), Line 13:
iconv.supportsNodeEncodingsExtension = !(Buffer.from || new Buffer(0) instanceof Uint8Array);