1 files changed, 73 insertions, 0 deletions
diff --git a/vendor/github.com/minio/minio-go/v7/pkg/utils/peek-reader-closer.go b/vendor/github.com/minio/minio-go/v7/pkg/utils/peek-reader-closer.go
new file mode 100644
index 000000000..d6f674fac
--- /dev/null
+++ b/vendor/github.com/minio/minio-go/v7/pkg/utils/peek-reader-closer.go
@@ -0,0 +1,73 @@
+/*
+ * MinIO Go Library for Amazon S3 Compatible Cloud Storage
+ * Copyright 2015-2025 MinIO, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package utils
+
+import (
+	"bytes"
+	"errors"
+	"io"
+)
+
+// PeekReadCloser offers a way to peek a ReadCloser stream and then
+// return the exact stream of the underlying ReadCloser
+type PeekReadCloser struct {
+	io.ReadCloser
+
+	recordMode   bool
+	recordMaxBuf int
+	recordBuf    *bytes.Buffer
+}
+
+// ReplayFromStart ensures next Read() will restart to stream the
+// underlying ReadCloser stream from the beginning
+func (prc *PeekReadCloser) ReplayFromStart() {
+	prc.recordMode = false
+}
+
+func (prc *PeekReadCloser) Read(p []byte) (int, error) {
+	if prc.recordMode {
+		if prc.recordBuf.Len() > prc.recordMaxBuf {
+			return 0, errors.New("maximum peek buffer exceeded")
+		}
+		n, err := prc.ReadCloser.Read(p)
+		prc.recordBuf.Write(p[:n])
+		return n, err
+	}
+	// Replay mode
+	if prc.recordBuf.Len() > 0 {
+		pn, _ := prc.recordBuf.Read(p)
+		return pn, nil
+	}
+	return prc.ReadCloser.Read(p)
+}
+
+// Close releases the record buffer memory and close the underlying ReadCloser
+func (prc *PeekReadCloser) Close() error {
+	prc.recordBuf.Reset()
+	return prc.ReadCloser.Close()
+}
+
+// NewPeekReadCloser returns a new peek reader
+func NewPeekReadCloser(rc io.ReadCloser, maxBufSize int) *PeekReadCloser {
+	return &PeekReadCloser{
+		ReadCloser:   rc,
+		recordMode:   true, // recording mode by default
+		recordBuf:    bytes.NewBuffer(make([]byte, 0, 1024)),
+		recordMaxBuf: maxBufSize,
+	}
+}