endpoint: Receiver.Receive: save a peek of recv stream to a temporary dataset if placeholder + encryption recv -F error is detected

util/chainedio/chainedio_readcloser.go

@@ -0,0 +1,43 @@
+package chainedio
+
+import "io"
+
+type ChainedReadCloser struct {
+	readers   []io.Reader
+	curReader int
+}
+
+func NewChainedReader(reader ...io.Reader) *ChainedReadCloser {
+	return &ChainedReadCloser{
+		readers:   reader,
+		curReader: 0,
+	}
+}
+
+func (c *ChainedReadCloser) Read(buf []byte) (n int, err error) {
+
+	n = 0
+
+	for c.curReader < len(c.readers) {
+		n, err = c.readers[c.curReader].Read(buf)
+		if err == io.EOF {
+			c.curReader++
+			continue
+		}
+		break
+	}
+	if c.curReader == len(c.readers) {
+		err = io.EOF // actually, there was no gap
+	}
+
+	return
+}
+
+func (c *ChainedReadCloser) Close() error {
+	for _, r := range c.readers {
+		if c, ok := r.(io.Closer); ok {
+			c.Close() // TODO debug log error?
+		}
+	}
+	return nil
+}

util/chainedio/chainedio_reader.go

@@ -1,34 +0,0 @@
-package chainedio
-
-import "io"
-
-type ChainedReader struct {
-	Readers   []io.Reader
-	curReader int
-}
-
-func NewChainedReader(reader ...io.Reader) *ChainedReader {
-	return &ChainedReader{
-		Readers:   reader,
-		curReader: 0,
-	}
-}
-
-func (c *ChainedReader) Read(buf []byte) (n int, err error) {
-
-	n = 0
-
-	for c.curReader < len(c.Readers) {
-		n, err = c.Readers[c.curReader].Read(buf)
-		if err == io.EOF {
-			c.curReader++
-			continue
-		}
-		break
-	}
-	if c.curReader == len(c.Readers) {
-		err = io.EOF // actually, there was no gap
-	}
-
-	return
-}