From 514731cf4b5dd97dc871b9fd84c4d9938900ef79 Mon Sep 17 00:00:00 2001
From: Quentin Dufour <quentin@deuxfleurs.fr>
Date: Fri, 19 Nov 2021 20:35:38 +0100
Subject: WIP DEBUG

---
 s3/file.go | 53 ++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 34 insertions(+), 19 deletions(-)

(limited to 's3/file.go')

diff --git a/s3/file.go b/s3/file.go
index aa4f227..40b40a1 100644
--- a/s3/file.go
+++ b/s3/file.go
@@ -73,6 +73,7 @@ func (f *S3File) loadObject() error {
 }
 
 func (f *S3File) Read(p []byte) (n int, err error) {
+	log.Printf("s3 Read\n")
 	//if f.Stat() & OBJECT == 0 { /* @FIXME Ideally we would check against OBJECT but we need a non OPAQUE_KEY */
 	//	return 0, os.ErrInvalid
 	//}
@@ -84,6 +85,7 @@ func (f *S3File) Read(p []byte) (n int, err error) {
 }
 
 func (f *S3File) ReadAt(p []byte, off int64) (n int, err error) {
+	log.Printf("s3 ReadAt %v\n", off)
 	if err := f.loadObject(); err != nil {
 		return 0, err
 	}
@@ -194,30 +196,43 @@ func (f *S3File) readDirRoot(count int) ([]fs.FileInfo, error) {
 }
 
 func (f *S3File) readDirChild(count int) ([]fs.FileInfo, error) {
-	prefix := f.Path.Key
-	if len(prefix) > 0 && prefix[len(prefix)-1:] != "/" {
-		prefix = prefix + "/"
-	}
+	var err error
+	if f.entries == nil {
+		prefix := f.Path.Key
+		if len(prefix) > 0 && prefix[len(prefix)-1:] != "/" {
+			prefix = prefix + "/"
+		}
 
-	objs_info := f.fs.mc.ListObjects(f.fs.ctx, f.Path.Bucket, minio.ListObjectsOptions{
-		Prefix:    prefix,
-		Recursive: false,
-	})
+		objs_info := f.fs.mc.ListObjects(f.fs.ctx, f.Path.Bucket, minio.ListObjectsOptions{
+			Prefix:    prefix,
+			Recursive: false,
+		})
 
-	entries := make([]fs.FileInfo, 0)
-	for object := range objs_info {
-		if object.Err != nil {
-			return nil, object.Err
-		}
-		//log.Println("Stat from GarageFile.readDirChild()", path.Join("/", f.path.bucket, object.Key))
-		nf, err := NewS3StatFromObjectInfo(f.fs, f.Path.Bucket, object)
-		if err != nil {
-			return nil, err
+		f.entries = make([]fs.FileInfo, 0)
+		for object := range objs_info {
+			if object.Err != nil {
+				return nil, object.Err
+			}
+			//log.Println("Stat from GarageFile.readDirChild()", path.Join("/", f.path.bucket, object.Key))
+			nf, err := NewS3StatFromObjectInfo(f.fs, f.Path.Bucket, object)
+			if err != nil {
+				return nil, err
+			}
+			f.entries = append(f.entries, nf)
 		}
-		entries = append(entries, nf)
 	}
+	beg := f.pos
+	end := int64(len(f.entries))
+	if count > 0 {
+		end = min(beg + int64(count), end)
+	}
+	f.pos = end
 
-	return entries, nil
+	if end - beg == 0 {
+		err = io.EOF
+	}
+
+	return f.entries[beg:end], err
 }
 
 func (f *S3File) Stat() (fs.FileInfo, error) {
-- 
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