Presigned URLs contains extra slash '/' between Hostaname and the ObjectPath

[Sergei-Kraven]

Hello!
Thanks a lot for your library, it really useful, but unfortunately I faced an unexpected behavior. Maybe I've missed up something, I'm expecting that the following code will returned a valid pre-signed URL to the object, but it doesn't work properly due to double slash (//) between the hostname (endpoint) and the object path:

import {
  AWSConfig,
  Endpoint,
  SignatureV4,
  AMZ_CONTENT_SHA256_HEADER,
} from 'https://jslib.k6.io/aws/0.13.0/signature'

export const options = {
  scenarios: {
    shared_iter_scenario: {
      executor: 'shared-iterations',
      vus: 1,
      iterations: 1,
    },
  },
};

export default function () {
  const awsConfig = new AWSConfig({
    region: 'us-east-1',
    accessKeyId: 'AKI.............6JOM',
    secretAccessKey: 'tI3PQ.............................la0C1b',
  })

  const signer = new SignatureV4({
    service: 's3',
    region: awsConfig.region,
    credentials: {
      accessKeyId: awsConfig.accessKeyId,
      secretAccessKey: awsConfig.secretAccessKey,
    },
    applyChecksum: false,
    uriEscapePath: true,
  })

  const signedRequest = signer.presign(
    {
      method: 'GET',
      endpoint: new Endpoint(`https://s3.${awsConfig.region}.amazonaws.com/`),
      path: '/bucket-name/path/to/the/file.txt',
      headers: {
        [AMZ_CONTENT_SHA256_HEADER]: 'UNSIGNED-PAYLOAD'
      },
    },
    {
      expiresIn: 480,
      signingDate: new Date(),
      signingService: 's3',
      signingRegion: awsConfig.region,
    }
  )

  const signedUrl = signedRequest.url.replace('.com//', '.com/') // !!! <-- DIRTY WORKAROUND !!!

  console.log(signedUrl)
}

The actual URL without the workaround is:

https://s3.us-east-1.amazonaws.com//bucket-name/path/to/the/file.txt?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIASRU53BBKVAXY6IQM%2F20241224%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20241224T150147Z&X-Amz-Expires=480&X-Amz-Signature=786f1a63dbe05922463789decc54cd9489e62a40381927fb13f84dea964c7796&X-Amz-SignedHeaders=host&x-amz-content-sha256=UNSIGNED-PAYLOAD

k6-jslib-aws/src/internal/signature.ts

Lines 167 to 169 in 06c4196

	if (!url.endsWith('/') && !request.path.startsWith('/')) {
	url += '/'
	}

Probably the same logic as in the code above should be here to avoid extra slash, but I'm not sure completely:

k6-jslib-aws/src/internal/signature.ts

Line 276 in 06c4196

url = url?.endsWith('/') ? url : url + '/'

[tarampampam]

I have the same issue 😞