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// Copyright 2021 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package lfs
import (
"context"
"errors"
"fmt"
"io"
"net/http"
)
// TransferAdapter represents an adapter for downloading/uploading LFS objects
type TransferAdapter interface {
Name() string
Download(ctx context.Context, r *ObjectResponse) (io.ReadCloser, error)
//Upload(ctx context.Context, reader io.Reader) error
}
// BasicTransferAdapter implements the "basic" adapter
type BasicTransferAdapter struct {
client *http.Client
}
// Name returns the name of the adapter
func (a *BasicTransferAdapter) Name() string {
return "basic"
}
// Download reads the download location and downloads the data
func (a *BasicTransferAdapter) Download(ctx context.Context, r *ObjectResponse) (io.ReadCloser, error) {
download, ok := r.Actions["download"]
if !ok {
return nil, errors.New("lfs.BasicTransferAdapter.Download: Action 'download' not found")
}
req, err := http.NewRequestWithContext(ctx, "GET", download.Href, nil)
if err != nil {
return nil, fmt.Errorf("lfs.BasicTransferAdapter.Download http.NewRequestWithContext: %w", err)
}
for key, value := range download.Header {
req.Header.Set(key, value)
}
res, err := a.client.Do(req)
if err != nil {
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
}
return nil, fmt.Errorf("lfs.BasicTransferAdapter.Download http.Do: %w", err)
}
return res.Body, nil
}
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