130 lines
3.0 KiB
Go
130 lines
3.0 KiB
Go
// 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 (
|
|
"bytes"
|
|
"context"
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"net/url"
|
|
"strings"
|
|
|
|
"code.gitea.io/gitea/modules/log"
|
|
)
|
|
|
|
// HTTPClient is used to communicate with the LFS server
|
|
// https://github.com/git-lfs/git-lfs/blob/main/docs/api/batch.md
|
|
type HTTPClient struct {
|
|
client *http.Client
|
|
endpoint string
|
|
transfers map[string]TransferAdapter
|
|
}
|
|
|
|
func newHTTPClient(endpoint *url.URL) *HTTPClient {
|
|
hc := &http.Client{}
|
|
|
|
client := &HTTPClient{
|
|
client: hc,
|
|
endpoint: strings.TrimSuffix(endpoint.String(), "/"),
|
|
transfers: make(map[string]TransferAdapter),
|
|
}
|
|
|
|
basic := &BasicTransferAdapter{hc}
|
|
|
|
client.transfers[basic.Name()] = basic
|
|
|
|
return client
|
|
}
|
|
|
|
func (c *HTTPClient) transferNames() []string {
|
|
keys := make([]string, len(c.transfers))
|
|
|
|
i := 0
|
|
for k := range c.transfers {
|
|
keys[i] = k
|
|
i++
|
|
}
|
|
|
|
return keys
|
|
}
|
|
|
|
func (c *HTTPClient) batch(ctx context.Context, operation string, objects []Pointer) (*BatchResponse, error) {
|
|
url := fmt.Sprintf("%s/objects/batch", c.endpoint)
|
|
|
|
request := &BatchRequest{operation, c.transferNames(), nil, objects}
|
|
|
|
payload := new(bytes.Buffer)
|
|
err := json.NewEncoder(payload).Encode(request)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("lfs.HTTPClient.batch json.Encode: %w", err)
|
|
}
|
|
|
|
log.Trace("lfs.HTTPClient.batch NewRequestWithContext: %s", url)
|
|
|
|
req, err := http.NewRequestWithContext(ctx, "POST", url, payload)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("lfs.HTTPClient.batch http.NewRequestWithContext: %w", err)
|
|
}
|
|
req.Header.Set("Content-type", MediaType)
|
|
req.Header.Set("Accept", MediaType)
|
|
|
|
res, err := c.client.Do(req)
|
|
if err != nil {
|
|
select {
|
|
case <-ctx.Done():
|
|
return nil, ctx.Err()
|
|
default:
|
|
}
|
|
return nil, fmt.Errorf("lfs.HTTPClient.batch http.Do: %w", err)
|
|
}
|
|
defer res.Body.Close()
|
|
|
|
if res.StatusCode != http.StatusOK {
|
|
return nil, fmt.Errorf("lfs.HTTPClient.batch: Unexpected servers response: %s", res.Status)
|
|
}
|
|
|
|
var response BatchResponse
|
|
err = json.NewDecoder(res.Body).Decode(&response)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("lfs.HTTPClient.batch json.Decode: %w", err)
|
|
}
|
|
|
|
if len(response.Transfer) == 0 {
|
|
response.Transfer = "basic"
|
|
}
|
|
|
|
return &response, nil
|
|
}
|
|
|
|
// Download reads the specific LFS object from the LFS server
|
|
func (c *HTTPClient) Download(ctx context.Context, oid string, size int64) (io.ReadCloser, error) {
|
|
var objects []Pointer
|
|
objects = append(objects, Pointer{oid, size})
|
|
|
|
result, err := c.batch(ctx, "download", objects)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
transferAdapter, ok := c.transfers[result.Transfer]
|
|
if !ok {
|
|
return nil, fmt.Errorf("lfs.HTTPClient.Download Transferadapter not found: %s", result.Transfer)
|
|
}
|
|
|
|
if len(result.Objects) == 0 {
|
|
return nil, errors.New("lfs.HTTPClient.Download: No objects in result")
|
|
}
|
|
|
|
content, err := transferAdapter.Download(ctx, result.Objects[0])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return content, nil
|
|
}
|