Fix multipart upload - move query parameters to HTTP request query object

[immavalls]

Corrects #42, which was not working in AWS s3.

I also corrected some typos in the comments and fixed the protocol to be this.scheme, allowing for either http or https.

[oleiade]

Great work @immavalls 🙇🏻 👍🏻

Could we add the following example in the examples folder please (as s3-multipart.js?)

import crypto from 'k6/crypto'
import exec from 'k6/execution'

import { AWSConfig, S3Client } from '../build/s3.js'

const awsConfig = new AWSConfig({
    region: __ENV.AWS_REGION,
    accessKeyId: __ENV.AWS_ACCESS_KEY_ID,
    secretAccessKey: __ENV.AWS_SECRET_ACCESS_KEY,
    sessionToken: __ENV.AWS_SESSION_TOKEN,
})

const s3 = new S3Client(awsConfig)

const testBucketName = 'test-jslib-aws'
const testFileKey = 'multipart.txt'

export default function () {
    // List the buckets the AWS authentication configuration
    // gives us access to.
    const buckets = s3.listBuckets()

    // If our test bucket does not exist, abort the execution.
    if (buckets.filter((b) => b.name === testBucketName).length == 0) {
        exec.test.abort()
    }

    // Produce random bytes to upload of size ~12MB, that
    // we will upload in two 6MB parts. This is done as the
    // minimum part size supported by S3 is 5MB.
    const bigFile = crypto.randomBytes(12 * 1024 * 1024)

    // Initialize a multipart upload
    const multipartUpload = s3.createMultipartUpload(testBucketName, testFileKey)

    // Upload the first part
    const firstPartData = bigFile.slice(0, 6 * 1024 * 1024)
    const firstPart = s3.uploadPart(
        testBucketName,
        testFileKey,
        multipartUpload.uploadId,
        1,
        firstPartData
    )

    // Upload the second part
    const secondPartData = bigFile.slice(6 * 1024 * 1024, 12 * 1024 * 1024)
    const secondPart = s3.uploadPart(
        testBucketName,
        testFileKey,
        multipartUpload.uploadId,
        2,
        secondPartData
    )

    // Complete the multipart upload
    s3.completeMultipartUpload(testBucketName, testFileKey, multipartUpload.uploadId, [
        firstPart,
        secondPart,
    ])

    // Let's redownload it verify it's correct, and delete it
    const obj = s3.getObject(testBucketName, testFileKey)
    s3.deleteObject(testBucketName, testFileKey)
}

[immavalls]

Thanks for the review and the example @oleiade, I just added it to the examples folder, so we might be ready to merge? I will work on finishing the docs part now with the example.

[oleiade]

Let's do it 👏🏻