Content-Encoding: Cannot read property 'some' of undefined

[anthonyalmarza]

Hi, So I'm sometimes running into this issue where on the following line there is raising a runtime error where binarySettings.contentEncodings is undefined.
https://github.com/vendia/serverless-express/blob/mainline/src/is-binary.js#L10

I'm not sure how this is happening but I've followed the trail up to the following two links if that helps.
https://github.com/vendia/serverless-express/blob/mainline/src/proxy.js#L28
https://github.com/vendia/serverless-express/blob/mainline/src/index.js#L17-L22

The following is the stacktrace I'm getting back from my lambda function.

ERROR	Unhandled Promise Rejection 	
{
    "errorType": "Runtime.UnhandledPromiseRejection",
    "errorMessage": "TypeError: Cannot read property 'some' of undefined",
    "reason": {
        "errorType": "TypeError",
        "errorMessage": "Cannot read property 'some' of undefined",
        "stack": [
            "TypeError: Cannot read property 'some' of undefined",
            "    at /var/task/node_modules/.pnpm/@vendia/serverless-express@4.3.1/node_modules/@vendia/serverless-express/src/is-binary.js:10:40",
            "    at Array.some (<anonymous>)",
            "    at isContentEncodingBinary (/var/task/node_modules/.pnpm/@vendia/serverless-express@4.3.1/node_modules/@vendia/serverless-express/src/is-binary.js:10:6)",
            "    at isBinary (/var/task/node_modules/.pnpm/@vendia/serverless-express@4.3.1/node_modules/@vendia/serverless-express/src/is-binary.js:40:10)",
            "    at forwardResponse (/var/task/node_modules/.pnpm/@vendia/serverless-express@4.3.1/node_modules/@vendia/serverless-express/src/transport.js:17:27)",
            "    at forwardRequestToNodeServer (/var/task/node_modules/.pnpm/@vendia/serverless-express@4.3.1/node_modules/@vendia/serverless-express/src/transport.js:139:3)",
            "    at processTicksAndRejections (internal/process/task_queues.js:93:5)"
        ]
    },
    "promise": {},
    "stack": [
        "Runtime.UnhandledPromiseRejection: TypeError: Cannot read property 'some' of undefined",
        "    at process.<anonymous> (/var/runtime/index.js:35:15)",
        "    at process.emit (events.js:315:20)",
        "    at process.EventEmitter.emit (domain.js:467:12)",
        "    at processPromiseRejections (internal/process/promises.js:245:33)",
        "    at processTicksAndRejections (internal/process/task_queues.js:94:32)"
    ]
}

More context around this sometimes happening is that when I remove Accept-Encoding from the headers the error is not raised. Very confusing.

Any and all help on this issue would be much appreciated.

Package deps:

"dependencies": {
    "@vendia/serverless-express": "^4.3.1",
    "compression": "^1.7.4",
    "express": "^4.17.1",
    "express-validator": "^6.9.2",
    "helmet": "^4.4.1"
  },

[brett-vendia]

Hi @anthonyalmarza, could you provide relevant parts from your Lambda handler? Are you setting binarySettings?

[github-actions]

🎉 This issue has been resolved in version 4.3.2 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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