aws - Uploading a string as file to a S3 bucket

Question

I'm trying to save a string as a file to an AWS S3 bucket using the AWS SDK for NodeJS. The PUT request gets succeeded, but the file does not get created in the S3 bucket. Following is a snippet from my code.

const s3 = new S3({ apiVersion: '2006-03-01' });

const JS_code = `
  let x = 'Hello World';
`;

// I'm using the following method inside an async function.
await s3.putObject({
        Bucket: 'my-bucket-gayashan',
        Key: 'myFile.js',
        ContentType:'binary',
        Body: Buffer.from(JS_code, 'binary')
      });

Can someone please help me with this?

Khalid T. · Accepted Answer · 2018-04-19 10:38:23Z

11

You should use promise() with await:

await s3.putObject({...}).promise();

answered Apr 19, 2018 at 10:38

Khalid T.

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2 Comments

LeOn - Han Li Over a year ago

oh man.. take me an hour until i get here... such a mistake... Thank you!

panza Over a year ago

putObject does not return a promise(), you just need to use await as long as your handler is async

poohitan · Accepted Answer · 2018-04-19 10:19:42Z

1

You should provide a valid MIME type in the ContentType field. In your case it should be application/javascript.

answered Apr 19, 2018 at 10:19

poohitan

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5 Comments

gayashanbc Over a year ago

Still, I'm getting the same result as before.

poohitan Over a year ago

Hmm, can you try to set Body: JS_code to upload it just as a string?

poohitan Over a year ago

Strange, I just tried and it worked for me. Maybe something with credentials, are you sure that the request completes ok? Can you try it like this?

s3.putObject({         Bucket: 'my-bucket-gayashan',         Key: 'myFile.js',         ContentType:'binary',         Body: Buffer.from(JS_code, 'binary')       }, (error, response) => console.log(error, response));

poohitan Over a year ago

putObject doesn't return a promise, so I don't understand why you use it with await. You should pass a callback to putObject and most likely you will see some error.

gayashanbc Over a year ago

OK, I think the problem was that I wasn't chaining the promise() method at the end of putObject() method as per Khalid T's answer below. It solved the issue.

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