Fix bucket name handling in signature V2 (#777)

Author: krisis

pkg/s3signer/request-signature-v2.go

@@ -42,9 +42,7 @@ const (
 func encodeURL2Path(u *url.URL) (path string) {
 	// Encode URL path.
 	if isS3, _ := filepath.Match("*.s3*.amazonaws.com", u.Host); isS3 {
-		hostSplits := strings.SplitN(u.Host, ".", 4)
-		// First element is the bucket name.
-		bucketName := hostSplits[0]
+		bucketName := u.Host[:strings.LastIndex(u.Host, ".s3")]
 		path = "/" + bucketName
 		path += u.Path
 		path = s3utils.EncodePath(path)

pkg/s3signer/utils_test.go

@@ -25,29 +25,35 @@ import (
 // Tests url encoding.
 func TestEncodeURL2Path(t *testing.T) {
 	type urlStrings struct {
+		bucketName     string
 		objName        string
 		encodedObjName string
 	}
 
 	bucketName := "bucketName"
 	want := []urlStrings{
 		{
+			bucketName:     "bucketName",
 			objName:        "本語",
 			encodedObjName: "%E6%9C%AC%E8%AA%9E",
 		},
 		{
+			bucketName:     "bucketName",
 			objName:        "本語.1",
 			encodedObjName: "%E6%9C%AC%E8%AA%9E.1",
 		},
 		{
 			objName:        ">123>3123123",
+			bucketName:     "bucketName",
 			encodedObjName: "%3E123%3E3123123",
 		},
 		{
+			bucketName:     "bucketName",
 			objName:        "test 1 2.txt",
 			encodedObjName: "test%201%202.txt",
 		},
 		{
+			bucketName:     "test.bucketName",
 			objName:        "test++ 1.txt",
 			encodedObjName: "test%2B%2B%201.txt",
 		},
@@ -63,4 +69,5 @@ func TestEncodeURL2Path(t *testing.T) {
 			t.Fatal("Error")
 		}
 	}
+
 }