Question 18227 in Amazon Web Sevices Question posted in
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AWS SDK v2: While copying files on S3: TypeError: Cannot read property 'appendToUserAgent' of undefined – Amazon Web Sevices

I’m calling the copyObject method of aws-sdk v2 ‘s S3 class:

const s3 = new AWS.S3({...s3Config});
// attempt 1
let copyObject = {
    Bucket: 'my-bucket-name',
    CopySource: `s3://my-bucket-name/my/file/path`,
    Key: `/my/destination/path`,
}

await s3.copyObject(copyObj);

// attempt 2
copyObject = {
    Bucket: 'my-bucket-name',
    CopySource: `my-bucket-name/my/file/path`,
    Key: `/my/destination/path`,
}

await s3.copyObject(copyObj);

Both fail with the same error:

Cannot read property 'appendToUserAgent' of undefined

Pointing to at promise (/src/node_modules/aws-sdk/lib/request.js:780:22). Am I missing something here? I referred to this documentation:

https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html#copyObject-property

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2

Answers


  1. Chosen as BEST ANSWER
    0

    Looking at Dzmitry Luhauskoi's answer, I realized that I was using the .promise in a for loop among other things and using Promise.all(). When I removed it from the array of promises and ran in its own separate promise, it ran successfully. I don't know why the AWS SDK's promise method is not compatible with most other promise related features of nodejs...


  2. 0

    Maybe it will help someone, I’ve got this error when tried to use promisify() on a send() function. It seems like function loses context or something. I promisified it manually with return new Promise(resolve => {})... and everything started to work as expected.

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