AWS S3 Upload - Empty File

[mmillican]

I'm using the AWS S3 uploader with pre-signed keys.

From what I can tell, the pre-signing response from my API is correct (validated the response format is correct and without a signature that I got a 403 when uploading to S3). The upload succeeds and I can see the objects in the bucket. However, the files appear to be "empty" yet they still have the proper content type and file size.

Component Config

dzOptions: {
  method: 'PUT',
  headers: {
    'Content-Type': 'image/jpeg'
  }
},
awsOpts: {
  signingURL: (f) => { return `https://localhost:5001/photos/upload-request?albumId=${this.album.id}&filename=${f.name}` },
  sendFileToServer: false,
  withCredentials: false // TODO: change when auth implemented
}

Signing Response

{
    "signature": {
        "Content-Type": "image/jpeg",
        "acl": "public-read",
        "success_action_status": "200",
        "policy": "123",
        "x-amz-credential": "AKIAI*******/20190822/us-east-1/s3/aws4_request",
        "x-amz-algorithm": "AWS4-HMAC-SHA256",
        "x-amz-date": "20190822T025046Z",
        "x-amz-signature": "*******",
        "key": "photos/test-4/IMG_2795.JPG"
    },
    "postEndpoint": "https://*******.s3.amazonaws.com/photos/test-4/****.JPG?X-Amz-Expires=60&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIA*******/us-east-1/s3/aws4_request&X-Amz-Date=20190822T025046Z&X-Amz-SignedHeaders=content-type;host&X-Amz-Signature=******"
}

Any thoughts?

[vrajroham]

@mmillican This is strange. I'll test and gt back to you.

[zyxit]

I see exactly the same issue – uploading to S3 directly with pre-signed request and quite often get empty file uploaded to S3. Using vue-dropzone 3.2.2.

[mmillican]

@vrajroham - curious if you've made any progress on this?