Initial commit

pkg/s3/s3-client.go

@@ -0,0 +1,97 @@
+package s3
+
+import (
+	"fmt"
+	"net/url"
+
+	"github.com/golang/glog"
+	"github.com/minio/minio-go"
+)
+
+const (
+	metadataName = ".meta"
+)
+
+type s3Client struct {
+	cr    *Credentials
+	minio *minio.Client
+}
+
+type bucketMetadata struct {
+	CapacityBytes int64
+}
+
+func newS3Client(cr *Credentials) (*s3Client, error) {
+	var client = &s3Client{}
+
+	client.cr = cr
+	u, err := url.Parse(client.cr.Endpoint)
+	if err != nil {
+		return nil, err
+	}
+	ssl := u.Scheme == "https"
+	endpoint := u.Hostname()
+	if u.Port() != "" {
+		endpoint = u.Hostname() + ":" + u.Port()
+	}
+	minioClient, err := minio.New(endpoint, client.cr.AccessKeyID, client.cr.SecretAccessKey, ssl)
+	if err != nil {
+		return nil, err
+	}
+	client.minio = minioClient
+	return client, nil
+}
+
+func (client *s3Client) bucketExists(bucketName string) (bool, error) {
+	return client.minio.BucketExists(bucketName)
+}
+
+func (client *s3Client) createBucket(bucketName string) error {
+	return client.minio.MakeBucket(bucketName, client.cr.Region)
+}
+
+func (client *s3Client) removeBucket(bucketName string) error {
+	if err := client.emptyBucket(bucketName); err != nil {
+		return err
+	}
+	return client.minio.RemoveBucket(bucketName)
+}
+
+func (client *s3Client) emptyBucket(bucketName string) error {
+	objectsCh := make(chan string)
+	var listErr error
+
+	go func() {
+		defer close(objectsCh)
+
+		doneCh := make(chan struct{})
+
+		defer close(doneCh)
+
+		for object := range client.minio.ListObjects(bucketName, "", true, doneCh) {
+			if object.Err != nil {
+				listErr = object.Err
+				return
+			}
+			objectsCh <- object.Key
+		}
+	}()
+
+	if listErr != nil {
+		glog.Error("Error listing objects", listErr)
+		return listErr
+	}
+
+	select {
+	default:
+		errorCh := client.minio.RemoveObjects(bucketName, objectsCh)
+		for e := range errorCh {
+			glog.Errorf("Failed to remove object %s, error: %s", e.ObjectName, e.Err)
+		}
+		if len(errorCh) != 0 {
+			return fmt.Errorf("Failed to remove all objects of bucket %s", bucketName)
+		}
+	}
+
+	return nil
+}