cli_ListBucket

// func (c *Client) ListBuckets(s3Uris []string, recursive bool, delimiter string, searchDepth int, keyRegex string) (chan *BucketItem, error) {
func (c *Client) ListBucketsTMP(s3Uris string, recursive bool, delimiter string, searchDepth int, keyRegex string) {
	fn := func(listOutput *BucketItem) {
		// if listOutput.IsPrefix {
		// 	fmt.Printf("%10s %s\n", "DIR", listOutput.FullKey)
		// } else {
		// 	var size string
		// 	// if humanReadable {
		// 	size = fmt.Sprintf("%10s", humanize.Bytes(uint64(listOutput.Size)))
		// 	// } else {
		// 	// size = fmt.Sprintf("%10d", listOutput.Size)
		// 	// }
		// 	date := ""
		// 	// if includeDates {
		// 	date = " " + (listOutput.LastModified).Format("2006-01-02T15:04:05")
		// 	// }
		// 	fmt.Printf("%s%s %s\n", size, date, listOutput.FullKey)
		// }
	}
	outChan := make(chan *BucketItem, 10000)

	slashRegex := regexp.MustCompile("/")
	bucketExpandedS3Uris := make([]string, 0, 1000)

	// object queries will always have atleast 3 slashes, e.g. s3://<bucket>/<object-dir>
	if len(slashRegex.FindAllString(s3Uris, -1)) != 2 {
		// If taget is not root
		bucketExpandedS3Uris = append(bucketExpandedS3Uris, s3Uris)
	} else {
		// root queries will always have 2 slashes, e.g. s3://<bucket-prefix>
		// Listing root buckets
		buckets := c.ListAllBuckets("")
		for _, bucket := range buckets {
			// add the bucket back to the list of s3 uris in cases where
			// we are searching beyond the bucket
			if recursive || searchDepth > 0 {
				_, resp := c.client.GetBucketLocationRequest(&s3.GetBucketLocationInput{Bucket: aws.String(bucket)})
				// Check and see if region is location constrained.If it is and it is not
				// in the region defined in our config or the default region ( us-east-1) then don't list it
				region, ok := c.config.Config(ConfigRegion)
				if !ok {

					region = "us-east-1"
				}
				if resp.LocationConstraint == nil ||
					*resp.LocationConstraint == region {
					bucketExpandedS3Uris = append(bucketExpandedS3Uris, FormatS3Uri(bucket, ""))
				}

			} else {
				key := ""
				fullKey := FormatS3Uri(bucket, "")
				outChan <- &BucketItem{
					IsPrefix:     true,
					Key:          key,
					FullKey:      fullKey,
					LastModified: time.Time{},
					Size:         0,
					Bucket:       bucket,
				}
			}
		}

	}
	go func() {
		defer close(outChan)

		for i := 0; i < searchDepth; i++ {
			newS3Uris := make([]string, 0)
			// List all items
			ch := make(chan *BucketItem, 10000)
			var wg sync.WaitGroup
			for _, uri := range bucketExpandedS3Uris {
				wg.Add(1)
				go func(uri string) {
					defer wg.Done()
					for itm := range c.GetBucketItem(uri, false, delimiter, keyRegex) {
						ch <- itm
					}
				}(uri)
			}
			go func() {
				wg.Wait()
				close(ch)
			}()
			for itm := range ch {
				if itm.IsPrefix {
					newS3Uris = append(newS3Uris, strings.TrimRight(itm.FullKey, delimiter)+delimiter)
				} else {
					outChan <- itm
				}
				fmt.Printf("%10s %s\n", "ITM", itm.FullKey)

			}
			bucketExpandedS3Uris = newS3Uris
		}

		// for itm := range c.listAll(bucketExpandedS3Uris, recursive, delimiter, keyRegex) {

		// 	outChan <- itm
		// }
	}()
	for listOutput := range outChan {
		fn(listOutput)
		// fmt.Printf("%10s %s\n", "DIR", listOutput.FullKey)
	}
}

Client-Side Encryption

Data at rest encryption 
------------------------------------------------------
https://en.wikipedia.org/wiki/Data_at_rest
https://github.com/tristanls/data-at-rest
https://cloudonaut.io/encrypting-sensitive-data-stored-on-s3/
https://github.com/widdix/s3-at-rest-encryption

https://pusher.com/sessions/meetup/viennajs/client-side-encryption-with-javascript
======================================================
Two-level homomorphic encryption for Node.js by WebAssembly
------------------------------------------------------
https://github.com/herumi/she-wasm
======================================================
Cross-platform library for secure data storage, message exchange, socket connections, and authentication
------------------------------------------------------
https://www.cossacklabs.com/themis/
https://www.cossacklabs.com/zero-knowledge-protocols-without-magic.html
https://github.com/cossacklabs/webthemis
https://github.com/cossacklabs/themis
======================================================
TS library with implementations of secp256k1, ripemd160, sha256, sha512, and sha1) in wasm
------------------------------------------------------
https://github.com/bitjson/bitcoin-ts
------------------------------------------------------
Benchmarks : 
https://github.com/bitjson/bitcoin-ts/wiki/Benchmarks
======================================================
WebAssembly implementation of Ed25519-based operations and more.
https://github.com/jedisct1/wasm-crypto
======================================================

Compatible with AWS API

an api library by minio that simple provides APIs to access any Amazon S3 compatible object storage server
https://github.com/minio/minio-js
======================================================

Concurrency

http://marcio.io/2015/07/handling-1-million-requests-per-minute-with-golang/

https://medium.com/@odeke_et/tame-concurrency-in-go-with-a-simple-channel-fb872723cabc

material on go

https://learnxinyminutes.com/docs/go/

https://www.goin5minutes.com/screencasts/

minio-mc-porting

go get -v github.com/minio/mc/...

Server-Side security

golang tls for http/http2 examples
------------------------------------------------------
https://github.com/smallnest/golang-tls
======================================================

Web Client

Javascript to Typescript transpiler
------------------------------------------------------
https://github.com/Lulubul/JSExperiment
https://github.com/ekoneko/es2ts
======================================================