afsc

README

afsc - Abstract File Storage Connectors

This library is compatible with Go 1.11+

Please refer to CHANGELOG.md if you encounter breaking changes.

• Usage
• Connectors
  • GCP - Google Storage
  • AWS - S3
• GoCover
• License
• Credits and Acknowledgements

This project provides various implementation for Abstract File Storage

Usage

import (
	"context"
	"fmt"
	"github.com/viant/afs"
	_ "github.com/viant/afsc/gs"
	_ "github.com/viant/afsc/s3"
	"io/ioutil"
	"log"
)

func main() {
	fs := afs.New()
	ctx := context.Background()
	objects, err := fs.List(ctx, "gs://myBucket/folder")
	if err != nil {
		log.Fatal(err)
	}
	for _, object := range objects {
		fmt.Printf("%v %v\n", object.Name(), object.URL())
		if object.IsDir() {
			continue
		}
		reader, err := fs.Download(ctx, object)
		if err != nil {
			log.Fatal(err)
		}
		defer reader.Close()
		data, err := ioutil.ReadAll(reader)
		if err != nil {
			log.Fatal(err)
		}
		fmt.Printf("%s\n", data)
	}

	err = fs.Copy(ctx, "gs://myBucket/folder", "s3://myBucket/cloned")
	if err != nil {
		log.Fatal(err)
	}
}

• Uploading/downloading with secure key

	customKey := s3.NewAES256Key([]byte("secret-key-that-is-32-bytes-long"))
	ctx := context.Background()
	fs := afs.New()
	err := fs.Upload(ctx, "s3://mybucket/folder/secret1.txt", 0644, strings.NewReader("my secret text"), customKey)
	if err != nil {
		log.Fatal(err)
	}
	reader, err := fs.DownloadWithURL(ctx, "s3://mybucket/folder/secret1.txt", customKey)
	data, err := ioutil.ReadAll(reader)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("data: %s\n", data)

• Streaming data with low memory footprint.

	_ = os.Setenv("AWS_SDK_LOAD_CONFIG", "true")
	ctx := context.Background()
	fs := afs.New()
	sourceURL := "s3://myBucket/path/myasset.gz"
	reader, err := fs.DownloadWithURL(ctx, sourceURL, option.NewStream(64*1024*1024, 0))
	if err != nil {
		log.Fatal(err)
	}
	jwtConfig, err := gs.NewJwtConfig()
	if err != nil {
		log.Fatal(err)
	}
	destURL := "gs://myBucket/path/myasset.gz"
	err = fs.Upload(ctx, destURL, 0644, reader, jwtConfig, &option.Checksum{Skip:true})
	if err != nil {
		log.Fatal(err)
		return
	}

Connectors

• GCP Google Storage
• AWS - S3

Secret stores

• GCP Google Secret Manager
• AWS - Secret Manager
• AWS - System Manager - Parameter

GoCover

License

The source code is made available under the terms of the Apache License, Version 2, as stated in the file LICENSE.

Individual files may be made available under their own specific license, all compatible with Apache License, Version 2. Please see individual files for details.

Credits and Acknowledgements

Library Author: Adrian Witas