xk6-frostfs/internal/datagen/payload.go

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package datagen
import (
"bytes"
"crypto/sha256"
"encoding/hex"
"io"
)
// Payload represents arbitrary data to be packed into S3 or native object.
// Implementations could be thread-unsafe.
type Payload interface {
// Reader returns io.Reader instance to read the payload.
// Must not be called twice.
Reader() io.Reader
// Bytes is a helper which reads all data from Reader() into slice.
// The sole purpose of this method is to simplify HTTP scenario,
// where all payload needs to be read and wrapped.
Bytes() []byte
// Size returns payload size, which is equal to the total amount of data
// that could be read from the Reader().
Size() int
// Hash returns payload sha256 hash. Must be called after all data is read from the reader.
Hash() string
}
type bytesPayload struct {
data []byte
}
func (p *bytesPayload) Reader() io.Reader {
return bytes.NewReader(p.data)
}
func (p *bytesPayload) Size() int {
return len(p.data)
}
func (p *bytesPayload) Hash() string {
h := sha256.Sum256(p.data[:])
return hex.EncodeToString(h[:])
}
func (p *bytesPayload) Bytes() []byte {
return p.data
}
func NewFixedPayload(data []byte) Payload {
return &bytesPayload{data: data}
}