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rewindablereader: allow to set max size (bluenviron/mediamtx#4791) #305

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rewindablereader: allow to set max size (bluenviron/mediamtx#4791) #305

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23 changes: 14 additions & 9 deletions pkg/rewindablereader/reader.go
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Original file line number Diff line number Diff line change
Expand Up @@ -6,25 +6,30 @@ import (
"io"
)

const (
maxRecordedSize = 1 * 1024 * 1024
)

// Reader is a reader that can be (and must be) rewinded once.
type Reader struct {
R io.Reader
R io.Reader
MaxSize int

entries [][]byte
size int
rewinded bool
initialized bool
entries [][]byte
size int
rewinded bool
}

// Read implements io.Reader.
func (r *Reader) Read(p []byte) (int, error) {
if !r.initialized {
r.initialized = true
if r.MaxSize == 0 {
r.MaxSize = 1 * 1024 * 1024
}
}

if !r.rewinded {
n, err := r.R.Read(p)

if (r.size + n) > maxRecordedSize {
if (r.size + n) > r.MaxSize {
return 0, errors.New("max recorded size exceeded")
}

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