spring - Uploading to Amazon S3 via curl route

Question

I am trying to set up a file upload REST API via Spring Boot.

I currently have a list/GET method curl http://localhost:8080/api/aws/s3/list which returns a list of objects that currently exist in the bucket.

For upload, I have been trying:

curl -F "data=@test.txt" http://localhost:8080/api/aws/s3/upload -i

Which produces:

HTTP/1.1 100 Continue

HTTP/1.1 200 OK
Date: Sun, 25 Jun 2017 23:28:36 GMT
X-Application-Context: application
Content-Type: application/json;charset=utf-8
Transfer-Encoding: chunked

But when I look at the bucket, it hasn't been updated with the new file.

Would this be a permissions issue on AWS? Only my account has read and write access. The user and group I created have admin privileges. I didn't add a Bucket Policy. This is my CORS configuration:

<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
<CORSRule>
    <AllowedOrigin>*</AllowedOrigin>
    <AllowedMethod>GET</AllowedMethod>
    <AllowedMethod>POST</AllowedMethod>
    <AllowedMethod>DELETE</AllowedMethod>
    <MaxAgeSeconds>3000</MaxAgeSeconds>
    <AllowedHeader>Authorization</AllowedHeader>
</CORSRule>
</CORSConfiguration>

Here is the upload section of my S3 Controller in spring:

@RequestMapping(value = "/upload", method = RequestMethod.POST)
public List<PutObjectResult> upload(@RequestParam("file") MultipartFile[] multipartFiles) {
    return s3Wrapper.upload(multipartFiles);
}

Answer 1

You should specify your using bucket name and some parameters for S3. And I guess it's PUT, not POST. There are several command line samples in the internet.

file=/path/to/file/to/upload.tar.gz
bucket=your-bucket
resource="/${bucket}/${file}"
contentType="application/x-compressed-tar"
dateValue=`date -R`
stringToSign="PUT

${contentType}
${dateValue}
${resource}"
s3Key=xxxxxxxxxxxxxxxxxxxx
s3Secret=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
signature=`echo -en ${stringToSign} | openssl sha1 -hmac ${s3Secret} -binary | base64`
curl -X PUT -T "${file}" 
  -H "Host: ${bucket}.s3.amazonaws.com" 
  -H "Date: ${dateValue}" 
  -H "Content-Type: ${contentType}" 
  -H "Authorization: AWS ${s3Key}:${signature}" 
  https://${bucket}.s3.amazonaws.com/${file}

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