/
export.go
53 lines (42 loc) · 896 Bytes
/
export.go
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package api
import (
"bytes"
"fmt"
"google.golang.org/genproto/googleapis/api/httpbody"
)
type httpBodyWriter struct {
chunkSize int
contentType string
buf *bytes.Buffer
stream tradingDataServiceExportServer
}
type tradingDataServiceExportServer interface {
Send(*httpbody.HttpBody) error
}
func (w *httpBodyWriter) Write(p []byte) (n int, err error) {
n = len(p)
w.buf.Write(p)
if w.buf.Len() >= w.chunkSize {
if err := w.sendChunk(); err != nil {
return 0, err
}
}
return n, nil
}
func (w *httpBodyWriter) sendChunk() error {
msg := &httpbody.HttpBody{
ContentType: w.contentType,
Data: w.buf.Bytes(),
}
if err := w.stream.Send(msg); err != nil {
return fmt.Errorf("error sending chunk: %w", err)
}
w.buf.Reset()
return nil
}
func (w *httpBodyWriter) Close() error {
if w.buf.Len() > 0 {
return w.sendChunk()
}
return nil
}