Use getObjectInfo() in both FS and XL ListObjects() to simplify and to return complete object information (#3247)

cmd/fs-v1.go

@@ -24,7 +24,6 @@ import (
 	"fmt"
 	"hash"
 	"io"
-	"os"
 	"path"
 	"sort"
 	"strings"
@@ -502,27 +501,17 @@ func (fs fsObjects) DeleteObject(bucket, object string) error {
 // ListObjects - list all objects at prefix upto maxKeys., optionally delimited by '/'. Maintains the list pool
 // state for future re-entrant list requests.
 func (fs fsObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (ListObjectsInfo, error) {
-	// Convert entry to FileInfo
-	entryToFileInfo := func(entry string) (fileInfo FileInfo, err error) {
+	// Convert entry to ObjectInfo
+	entryToObjectInfo := func(entry string) (objInfo ObjectInfo, err error) {
 		if strings.HasSuffix(entry, slashSeparator) {
 			// Object name needs to be full path.
-			fileInfo.Name = entry
-			fileInfo.Mode = os.ModeDir
+			objInfo.Name = entry
+			objInfo.IsDir = true
 			return
 		}
-		if fileInfo, err = fs.storage.StatFile(bucket, entry); err != nil {
-			return FileInfo{}, traceError(err)
+		if objInfo, err = fs.getObjectInfo(bucket, entry); err != nil {
+			return ObjectInfo{}, err
 		}
-		fsMeta, mErr := readFSMetadata(fs.storage, minioMetaBucket, path.Join(bucketMetaPrefix, bucket, entry, fsMetaJSONFile))
-		if mErr != nil && errorCause(mErr) != errFileNotFound {
-			return FileInfo{}, traceError(mErr)
-		}
-		if len(fsMeta.Meta) == 0 {
-			fsMeta.Meta = make(map[string]string)
-		}
-		// Object name needs to be full path.
-		fileInfo.Name = entry
-		fileInfo.MD5Sum = fsMeta.Meta["md5Sum"]
 		return
 	}
 
@@ -591,7 +580,7 @@ func (fs fsObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKey
 		listDir := listDirFactory(isLeaf, fsTreeWalkIgnoredErrs, fs.storage)
 		walkResultCh = startTreeWalk(bucket, prefix, marker, recursive, listDir, isLeaf, endWalkCh)
 	}
-	var fileInfos []FileInfo
+	var objInfos []ObjectInfo
 	var eof bool
 	var nextMarker string
 	for i := 0; i < maxKeys; {
@@ -609,12 +598,12 @@ func (fs fsObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKey
 			}
 			return ListObjectsInfo{}, toObjectErr(walkResult.err, bucket, prefix)
 		}
-		fileInfo, err := entryToFileInfo(walkResult.entry)
+		objInfo, err := entryToObjectInfo(walkResult.entry)
 		if err != nil {
 			return ListObjectsInfo{}, nil
 		}
-		nextMarker = fileInfo.Name
-		fileInfos = append(fileInfos, fileInfo)
+		nextMarker = objInfo.Name
+		objInfos = append(objInfos, objInfo)
 		if walkResult.end {
 			eof = true
 			break
@@ -627,19 +616,13 @@ func (fs fsObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKey
 	}
 
 	result := ListObjectsInfo{IsTruncated: !eof}
-	for _, fileInfo := range fileInfos {
-		result.NextMarker = fileInfo.Name
-		if fileInfo.Mode.IsDir() {
-			result.Prefixes = append(result.Prefixes, fileInfo.Name)
+	for _, objInfo := range objInfos {
+		result.NextMarker = objInfo.Name
+		if objInfo.IsDir {
+			result.Prefixes = append(result.Prefixes, objInfo.Name)
 			continue
 		}
-		result.Objects = append(result.Objects, ObjectInfo{
-			Name:    fileInfo.Name,
-			ModTime: fileInfo.ModTime,
-			Size:    fileInfo.Size,
-			MD5Sum:  fileInfo.MD5Sum,
-			IsDir:   false,
-		})
+		result.Objects = append(result.Objects, objInfo)
 	}
 	return result, nil
 }

cmd/object-api-listobjects_test.go

@@ -51,20 +51,21 @@ func testListObjects(obj ObjectLayer, instanceType string, t TestErrHandler) {
 	testObjects := []struct {
 		name    string
 		content string
+		meta    map[string]string
 	}{
-		{"Asia-maps", "asis-maps"},
-		{"Asia/India/India-summer-photos-1", "contentstring"},
-		{"Asia/India/Karnataka/Bangalore/Koramangala/pics", "contentstring"},
-		{"newPrefix0", "newPrefix0"},
-		{"newPrefix1", "newPrefix1"},
-		{"newzen/zen/recurse/again/again/again/pics", "recurse"},
-		{"obj0", "obj0"},
-		{"obj1", "obj1"},
-		{"obj2", "obj2"},
+		{"Asia-maps.png", "asis-maps", map[string]string{"content-type": "image/png"}},
+		{"Asia/India/India-summer-photos-1", "contentstring", nil},
+		{"Asia/India/Karnataka/Bangalore/Koramangala/pics", "contentstring", nil},
+		{"newPrefix0", "newPrefix0", nil},
+		{"newPrefix1", "newPrefix1", nil},
+		{"newzen/zen/recurse/again/again/again/pics", "recurse", nil},
+		{"obj0", "obj0", nil},
+		{"obj1", "obj1", nil},
+		{"obj2", "obj2", nil},
 	}
 	sha256sum := ""
 	for _, object := range testObjects {
-		_, err = obj.PutObject(testBuckets[0], object.name, int64(len(object.content)), bytes.NewBufferString(object.content), nil, sha256sum)
+		_, err = obj.PutObject(testBuckets[0], object.name, int64(len(object.content)), bytes.NewBufferString(object.content), object.meta, sha256sum)
 		if err != nil {
 			t.Fatalf("%s : %s", instanceType, err.Error())
 		}
@@ -80,7 +81,7 @@ func testListObjects(obj ObjectLayer, instanceType string, t TestErrHandler) {
 		{
 			IsTruncated: false,
 			Objects: []ObjectInfo{
-				{Name: "Asia-maps"},
+				{Name: "Asia-maps.png", ContentType: "image/png"},
 				{Name: "Asia/India/India-summer-photos-1"},
 				{Name: "Asia/India/Karnataka/Bangalore/Koramangala/pics"},
 				{Name: "newPrefix0"},
@@ -96,7 +97,7 @@ func testListObjects(obj ObjectLayer, instanceType string, t TestErrHandler) {
 		{
 			IsTruncated: true,
 			Objects: []ObjectInfo{
-				{Name: "Asia-maps"},
+				{Name: "Asia-maps.png", ContentType: "image/png"},
 				{Name: "Asia/India/India-summer-photos-1"},
 				{Name: "Asia/India/Karnataka/Bangalore/Koramangala/pics"},
 				{Name: "newPrefix0"},
@@ -108,7 +109,7 @@ func testListObjects(obj ObjectLayer, instanceType string, t TestErrHandler) {
 		{
 			IsTruncated: true,
 			Objects: []ObjectInfo{
-				{Name: "Asia-maps"},
+				{Name: "Asia-maps.png", ContentType: "image/png"},
 				{Name: "Asia/India/India-summer-photos-1"},
 				{Name: "Asia/India/Karnataka/Bangalore/Koramangala/pics"},
 				{Name: "newPrefix0"},
@@ -119,7 +120,7 @@ func testListObjects(obj ObjectLayer, instanceType string, t TestErrHandler) {
 		{
 			IsTruncated: true,
 			Objects: []ObjectInfo{
-				{Name: "Asia-maps"},
+				{Name: "Asia-maps.png", ContentType: "image/png"},
 				{Name: "Asia/India/India-summer-photos-1"},
 				{Name: "Asia/India/Karnataka/Bangalore/Koramangala/pics"},
 			},
@@ -130,7 +131,7 @@ func testListObjects(obj ObjectLayer, instanceType string, t TestErrHandler) {
 		{
 			IsTruncated: true,
 			Objects: []ObjectInfo{
-				{Name: "Asia-maps"},
+				{Name: "Asia-maps.png", ContentType: "image/png"},
 			},
 		},
 		// ListObjectsResult-5.
@@ -233,7 +234,7 @@ func testListObjects(obj ObjectLayer, instanceType string, t TestErrHandler) {
 		{
 			IsTruncated: false,
 			Objects: []ObjectInfo{
-				{Name: "Asia-maps"},
+				{Name: "Asia-maps.png", ContentType: "image/png"},
 				{Name: "Asia/India/India-summer-photos-1"},
 				{Name: "Asia/India/Karnataka/Bangalore/Koramangala/pics"},
 				{Name: "newPrefix0"},
@@ -342,7 +343,7 @@ func testListObjects(obj ObjectLayer, instanceType string, t TestErrHandler) {
 		{
 			IsTruncated: false,
 			Objects: []ObjectInfo{
-				{Name: "Asia-maps"},
+				{Name: "Asia-maps.png", ContentType: "image/png"},
 				{Name: "Asia/India/India-summer-photos-1"},
 				{Name: "Asia/India/Karnataka/Bangalore/Koramangala/pics"},
 			},
@@ -353,7 +354,7 @@ func testListObjects(obj ObjectLayer, instanceType string, t TestErrHandler) {
 		{
 			IsTruncated: false,
 			Objects: []ObjectInfo{
-				{Name: "Asia-maps"},
+				{Name: "Asia-maps.png", ContentType: "image/png"},
 			},
 		},
 		// ListObjectsResult-26.
@@ -548,6 +549,10 @@ func testListObjects(obj ObjectLayer, instanceType string, t TestErrHandler) {
 				if testCase.result.Objects[j].Name != result.Objects[j].Name {
 					t.Errorf("Test %d: %s: Expected object name to be \"%s\", but found \"%s\" instead", i+1, instanceType, testCase.result.Objects[j].Name, result.Objects[j].Name)
 				}
+				if testCase.result.Objects[j].ContentType != result.Objects[j].ContentType {
+					t.Errorf("Test %d: %s: Expected object contentType to be \"%s\", but found \"%s\" instead", i+1, instanceType, testCase.result.Objects[j].ContentType, result.Objects[j].ContentType)
+				}
+
 			}
 			if testCase.result.IsTruncated != result.IsTruncated {
 				t.Errorf("Test %d: %s: Expected IsTruncated flag to be %v, but instead found it to be %v", i+1, instanceType, testCase.result.IsTruncated, result.IsTruncated)

cmd/storage-datatypes.go

@@ -46,7 +46,4 @@ type FileInfo struct {
 
 	// File mode bits.
 	Mode os.FileMode
-
-	// Hex encoded md5 checksum of the file.
-	MD5Sum string
 }

cmd/xl-v1-list-objects.go

@@ -93,13 +93,7 @@ func (xl xlObjects) listObjects(bucket, prefix, marker, delimiter string, maxKey
 			result.Prefixes = append(result.Prefixes, objInfo.Name)
 			continue
 		}
-		result.Objects = append(result.Objects, ObjectInfo{
-			Name:    objInfo.Name,
-			ModTime: objInfo.ModTime,
-			Size:    objInfo.Size,
-			MD5Sum:  objInfo.MD5Sum,
-			IsDir:   false,
-		})
+		result.Objects = append(result.Objects, objInfo)
 	}
 	return result, nil
 }