memfs: export the Decode method and return the decoded content

Also, fix the buffer that is not being reset while reading and decoding
the content.

4 files changed, 17 insertions, 8 deletions

diff --git a/CHANGELOG.adoc b/CHANGELOG.adoc
index 5dc9ef25..c5a34b05 100644
--- a/CHANGELOG.adoc
+++ b/CHANGELOG.adoc
@@ -65,6 +65,8 @@ to Search the content.
 
 *  http: add content and response type HTML and XML
 
+*  memfs: export the Decode method on Node
+
 
 ==  share v0.8.2 (2019-09-05)
 
diff --git a/CHANGELOG.html b/CHANGELOG.html
index b78dd110..6c14f8b7 100644
--- a/CHANGELOG.html
+++ b/CHANGELOG.html
@@ -205,6 +205,9 @@ to Search the content.</p>
 <li>
 <p>http: add content and response type HTML and XML</p>
 </li>
+<li>
+<p>memfs: export the Decode method on Node</p>
+</li>
 </ul>
 </div>
 </div>
diff --git a/lib/memfs/memfs.go b/lib/memfs/memfs.go
index 8ab6f8e2..68d100a3 100644
--- a/lib/memfs/memfs.go
+++ b/lib/memfs/memfs.go
@@ -511,7 +511,7 @@ func (mfs *MemFS) Search(words []string, snippetLen int) (results []SearchResult
 		}
 
 		if len(node.lowerv) == 0 {
-			err := node.decode()
+			_, err := node.Decode()
 			if err != nil {
 				log.Printf("memfs.Search: " + err.Error())
 				continue
diff --git a/lib/memfs/node.go b/lib/memfs/node.go
index c461481f..1b9f20b2 100644
--- a/lib/memfs/node.go
+++ b/lib/memfs/node.go
@@ -90,10 +90,14 @@ func NewNode(parent *Node, fi os.FileInfo, withContent bool) (node *Node, err er
 	return node, nil
 }
 
-func (leaf *Node) decode() (err error) {
+//
+// Decode the contents of node (for example, uncompress with gzip) and return
+// it.
+//
+func (leaf *Node) Decode() ([]byte, error) {
 	if len(leaf.ContentEncoding) == 0 {
 		leaf.plainv = leaf.V
-		return nil
+		return leaf.plainv, nil
 	}
 
 	leaf.plainv = leaf.plainv[:0]
@@ -101,26 +105,26 @@ func (leaf *Node) decode() (err error) {
 	if leaf.ContentEncoding == EncodingGzip {
 		r, err := gzip.NewReader(bytes.NewReader(leaf.V))
 		if err != nil {
-			return err
+			return nil, err
 		}
 
 		buf := make([]byte, 1024)
-
 		for {
 			n, err := r.Read(buf)
 			if n > 0 {
-				leaf.plainv = append(leaf.plainv, buf...)
+				leaf.plainv = append(leaf.plainv, buf[:n]...)
 			}
 			if err != nil {
 				if err == io.EOF {
 					break
 				}
-				return err
+				return nil, err
 			}
+			buf = buf[0:]
 		}
 	}
 
-	return nil
+	return leaf.plainv, nil
 }
 
 //