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: [PATCH] WIP DEBUG

---
 s3/file.go     | 59 +++++++++++++++++++++++++++++++-------------------
 s3/stat.go     |  2 ++
 sftp/server.go |  5 +++--
 3 files changed, 42 insertions(+), 24 deletions(-)

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,
+		})
+
+		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)
+		}
+	}
+	beg := f.pos
+	end := int64(len(f.entries))
+	if count > 0 {
+		end = min(beg + int64(count), end)
+	}
+	f.pos = end
+
+	if end - beg == 0 {
+		err = io.EOF
 	}
 
-	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
-		}
-		entries = append(entries, nf)
-	}
-
-	return entries, nil
+	return f.entries[beg:end], err
 }
 
 func (f *S3File) Stat() (fs.FileInfo, error) {
diff --git a/s3/stat.go b/s3/stat.go
index 96b0c24..c91a757 100644
--- a/s3/stat.go
+++ b/s3/stat.go
@@ -1,6 +1,7 @@
 package s3
 
 import (
+	"log"
 	"errors"
 	"io/fs"
 	"path"
@@ -104,6 +105,7 @@ func (s *S3Stat) Name() string {
 }
 
 func (s *S3Stat) Size() int64 {
+	log.Println("stat size: ", s.obj.Size)
 	return s.obj.Size
 }
 
diff --git a/sftp/server.go b/sftp/server.go
index 6b2b20f..51db31a 100644
--- a/sftp/server.go
+++ b/sftp/server.go
@@ -183,7 +183,7 @@ func handlePacket(s *Server, p orderedRequest) error {
 	case *sshFxpStatPacket:
 		log.Println("pkt: stat: ", p.Path)
 		// stat the requested file
-		info, err := os.Stat(toLocalPath(p.Path))
+		info, err := s.fs.Stat(s.ctx, p.Path)
 		rpkt = &sshFxpStatResponse{
 			ID:   p.ID,
 			info: info,
@@ -286,13 +286,14 @@ func handlePacket(s *Server, p orderedRequest) error {
 			}).respond(s)
 		}
 	case *sshFxpReadPacket:
-		log.Println("pkt: read handle: ", p.Handle)
 		var err error = EBADF
 		f, ok := s.getHandle(p.Handle)
+		log.Println("pkt: read handle: ", p.Handle, f.Path.Path)
 		if ok {
 			err = nil
 			data := p.getDataSlice(s.pktMgr.alloc, orderID)
 			n, _err := f.ReadAt(data, int64(p.Offset))
+			log.Println("DEBUG: ", n, _err, p.Offset)
 			if _err != nil && (_err != io.EOF || n == 0) {
 				err = _err
 			}