/
get_chunk.go
62 lines (52 loc) · 1.26 KB
/
get_chunk.go
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package seaweedfs
import (
"compress/gzip"
"context"
"fmt"
"github.com/youngfs/youngfs/pkg/errors"
"io"
"net/http"
)
func (e *Engine) GetChunk(ctx context.Context, id string) (io.ReadCloser, error) {
url, err := e.getFidUrl(id)
if err != nil {
return nil, err
}
req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
if err != nil {
return nil, errors.ErrEngineChunk.WarpErr(err)
}
req.Header.Add("Accept-Encoding", "gzip")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, errors.ErrEngineChunk.WarpErr(err)
}
if resp.StatusCode != http.StatusOK {
if resp.StatusCode == http.StatusNotFound {
return nil, errors.ErrChunkNotExist
}
return nil, errors.ErrEngineChunk.WithMessagef("seaweedfs get failed: %s", resp.Status)
}
var reader io.ReadCloser
switch resp.Header.Get("Content-Encoding") {
case "gzip":
reader, err = gzip.NewReader(resp.Body)
default:
reader = resp.Body
}
defer func() {
_ = reader.Close()
}()
return reader, nil
}
func (e *Engine) getFidUrl(fid string) (string, error) {
volumeId, _, err := e.parseFid(fid)
if err != nil {
return "", err
}
host, err := e.getVolumeEndpoints(volumeId)
if err != nil {
return "", err
}
return fmt.Sprintf("http://%s/%s", host, fid), nil
}