136 lines
3.3 KiB
Go
136 lines
3.3 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package lfs
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"io"
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"net/http"
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"code.gitea.io/gitea/modules/json"
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"code.gitea.io/gitea/modules/log"
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)
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// TransferAdapter represents an adapter for downloading/uploading LFS objects
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type TransferAdapter interface {
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Name() string
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Download(ctx context.Context, l *Link) (io.ReadCloser, error)
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Upload(ctx context.Context, l *Link, p Pointer, r io.Reader) error
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Verify(ctx context.Context, l *Link, p Pointer) error
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}
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// BasicTransferAdapter implements the "basic" adapter
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type BasicTransferAdapter struct {
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client *http.Client
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}
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// Name returns the name of the adapter
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func (a *BasicTransferAdapter) Name() string {
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return "basic"
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}
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// Download reads the download location and downloads the data
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func (a *BasicTransferAdapter) Download(ctx context.Context, l *Link) (io.ReadCloser, error) {
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resp, err := a.performRequest(ctx, "GET", l, nil, nil)
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if err != nil {
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return nil, err
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}
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return resp.Body, nil
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}
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// Upload sends the content to the LFS server
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func (a *BasicTransferAdapter) Upload(ctx context.Context, l *Link, p Pointer, r io.Reader) error {
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_, err := a.performRequest(ctx, "PUT", l, r, func(req *http.Request) {
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if len(req.Header.Get("Content-Type")) == 0 {
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req.Header.Set("Content-Type", "application/octet-stream")
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}
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if req.Header.Get("Transfer-Encoding") == "chunked" {
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req.TransferEncoding = []string{"chunked"}
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}
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req.ContentLength = p.Size
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})
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if err != nil {
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return err
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}
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return nil
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}
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// Verify calls the verify handler on the LFS server
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func (a *BasicTransferAdapter) Verify(ctx context.Context, l *Link, p Pointer) error {
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b, err := json.Marshal(p)
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if err != nil {
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log.Error("Error encoding json: %v", err)
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return err
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}
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_, err = a.performRequest(ctx, "POST", l, bytes.NewReader(b), func(req *http.Request) {
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req.Header.Set("Content-Type", MediaType)
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})
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if err != nil {
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return err
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}
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return nil
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}
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func (a *BasicTransferAdapter) performRequest(ctx context.Context, method string, l *Link, body io.Reader, callback func(*http.Request)) (*http.Response, error) {
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log.Trace("Calling: %s %s", method, l.Href)
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req, err := http.NewRequestWithContext(ctx, method, l.Href, body)
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if err != nil {
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log.Error("Error creating request: %v", err)
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return nil, err
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}
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for key, value := range l.Header {
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req.Header.Set(key, value)
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}
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req.Header.Set("Accept", MediaType)
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if callback != nil {
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callback(req)
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}
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res, err := a.client.Do(req)
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if err != nil {
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select {
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case <-ctx.Done():
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return res, ctx.Err()
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default:
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}
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log.Error("Error while processing request: %v", err)
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return res, err
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}
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if res.StatusCode != http.StatusOK {
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return res, handleErrorResponse(res)
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}
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return res, nil
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}
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func handleErrorResponse(resp *http.Response) error {
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defer resp.Body.Close()
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er, err := decodeResponseError(resp.Body)
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if err != nil {
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return fmt.Errorf("Request failed with status %s", resp.Status)
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}
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log.Trace("ErrorRespone: %v", er)
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return errors.New(er.Message)
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}
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func decodeResponseError(r io.Reader) (ErrorResponse, error) {
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var er ErrorResponse
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err := json.NewDecoder(r).Decode(&er)
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if err != nil {
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log.Error("Error decoding json: %v", err)
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}
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return er, err
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}
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