Use local instance of minio server.

Need to figure out how to have tests automatically start and kill
server.

Godeps/Godeps.json

@@ -24,8 +24,7 @@
 		},
 		{
 			"ImportPath": "github.com/minio/minio-go",
-			"Comment": "v0.2.5-58-g5c3a491",
-			"Rev": "5c3a4919116141f088990bd6ee385877648c7a25"
+			"Rev": "61f6570da0edd761974216c9ed5da485d3cc0c99"
 		},
 		{
 			"ImportPath": "github.com/pkg/sftp",

backend/s3/s3.go

@@ -3,9 +3,7 @@ package s3
 import (
 	"bytes"
 	"errors"
-	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"strings"
 
@@ -48,8 +46,12 @@ func Open(regionname, bucketname string) (backend.Backend, error) {
 		}
 	} else {
 		// S3 compatible endpoint
+		if strings.Contains(regionname, "localhost") || strings.Contains(regionname, "127.0.0.1") {
+			config.Endpoint = "http://" + regionname
+		} else {
 			config.Endpoint = "https://" + regionname
 		}
+	}
 
 	s3api, s3err := minio.New(config)
 	if s3err != nil {
@@ -142,27 +144,9 @@ func (be *S3Backend) Get(t backend.Type, name string) (io.ReadCloser, error) {
 // GetReader returns an io.ReadCloser for the Blob with the given name of
 // type t at offset and length. If length is 0, the reader reads until EOF.
 func (be *S3Backend) GetReader(t backend.Type, name string, offset, length uint) (io.ReadCloser, error) {
-	rc, err := be.Get(t, name)
-	if err != nil {
-		return nil, err
-
-	}
-
-	n, errc := io.CopyN(ioutil.Discard, rc, int64(offset))
-	if errc != nil {
-		return nil, errc
-
-	} else if n != int64(offset) {
-		return nil, fmt.Errorf("less bytes read than expected, read: %d, expected: %d", n, offset)
-
-	}
-
-	if length == 0 {
-		return rc, nil
-
-	}
-
-	return backend.LimitReadCloser(rc, int64(length)), nil
+	path := s3path(t, name)
+	rc, _, err := be.s3api.GetPartialObject(be.bucketname, path, int64(offset), int64(length))
+	return rc, err
 }
 
 // Test returns true if a blob of the given type and name exists in the backend.

backend/s3_test.go

@@ -1,17 +1,34 @@
 package backend_test
 
 import (
+	"os"
 	"testing"
 
+	"github.com/minio/minio-go"
 	bes3 "github.com/restic/restic/backend/s3"
+	. "github.com/restic/restic/test"
 )
 
 func TestS3Backend(t *testing.T) {
-	s, err := bes3.Open("play.minio.io:9000", "restictestbucket")
-
+	config := minio.Config{
+		AccessKeyID:     os.Getenv("AWS_ACCESS_KEY_ID"),
+		SecretAccessKey: os.Getenv("AWS_SECRET_ACCESS_KEY"),
+		Endpoint:        "http://localhost:9000",
+	}
+	s3Client, err := minio.New(config)
 	if err != nil {
 		t.Fatal(err)
 	}
 
+	bucketname := "restictestbucket"
+
+	err = s3Client.MakeBucket(bucketname, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	s, err := bes3.Open("127.0.0.1:9000", bucketname)
+	OK(t, err)
+
 	testBackend(s, t)
 }