pages-server/server/gitea/client.go
6543 dc41a4caf4 Add Support to Follow Symlinks and LFS (#114)
close #79
close #80
close #91

Co-authored-by: 6543 <6543@obermui.de>
Reviewed-on: https://codeberg.org/Codeberg/pages-server/pulls/114
2022-08-12 06:40:12 +02:00

142 lines
4 KiB
Go

package gitea
import (
"errors"
"fmt"
"net/url"
"strings"
"time"
"github.com/rs/zerolog/log"
"github.com/valyala/fasthttp"
"github.com/valyala/fastjson"
)
const (
giteaAPIRepos = "/api/v1/repos/"
giteaObjectTypeHeader = "X-Gitea-Object-Type"
)
var ErrorNotFound = errors.New("not found")
type Client struct {
giteaRoot string
giteaAPIToken string
fastClient *fasthttp.Client
infoTimeout time.Duration
contentTimeout time.Duration
followSymlinks bool
supportLFS bool
}
// TODO: once golang v1.19 is min requirement, we can switch to 'JoinPath()' of 'net/url' package
func joinURL(baseURL string, paths ...string) string {
p := make([]string, 0, len(paths))
for i := range paths {
path := strings.TrimSpace(paths[i])
path = strings.Trim(path, "/")
if len(path) != 0 {
p = append(p, path)
}
}
return baseURL + "/" + strings.Join(p, "/")
}
func NewClient(giteaRoot, giteaAPIToken string, followSymlinks, supportLFS bool) (*Client, error) {
rootURL, err := url.Parse(giteaRoot)
giteaRoot = strings.Trim(rootURL.String(), "/")
return &Client{
giteaRoot: giteaRoot,
giteaAPIToken: giteaAPIToken,
infoTimeout: 5 * time.Second,
contentTimeout: 10 * time.Second,
fastClient: getFastHTTPClient(),
followSymlinks: followSymlinks,
supportLFS: supportLFS,
}, err
}
func (client *Client) GiteaRawContent(targetOwner, targetRepo, ref, resource string) ([]byte, error) {
resp, err := client.ServeRawContent(targetOwner, targetRepo, ref, resource)
if err != nil {
return nil, err
}
return resp.Body(), nil
}
func (client *Client) ServeRawContent(targetOwner, targetRepo, ref, resource string) (*fasthttp.Response, error) {
var apiURL string
if client.supportLFS {
apiURL = joinURL(client.giteaRoot, giteaAPIRepos, targetOwner, targetRepo, "media", resource+"?ref="+url.QueryEscape(ref))
} else {
apiURL = joinURL(client.giteaRoot, giteaAPIRepos, targetOwner, targetRepo, "raw", resource+"?ref="+url.QueryEscape(ref))
}
resp, err := client.do(client.contentTimeout, apiURL)
if err != nil {
return nil, err
}
if err != nil {
return nil, err
}
switch resp.StatusCode() {
case fasthttp.StatusOK:
objType := string(resp.Header.Peek(giteaObjectTypeHeader))
log.Trace().Msgf("server raw content object: %s", objType)
if client.followSymlinks && objType == "symlink" {
// TODO: limit to 1000 chars if we switched to std
linkDest := strings.TrimSpace(string(resp.Body()))
log.Debug().Msgf("follow symlink from '%s' to '%s'", resource, linkDest)
return client.ServeRawContent(targetOwner, targetRepo, ref, linkDest)
}
return resp, nil
case fasthttp.StatusNotFound:
return nil, ErrorNotFound
default:
return nil, fmt.Errorf("unexpected status code '%d'", resp.StatusCode())
}
}
func (client *Client) GiteaGetRepoBranchTimestamp(repoOwner, repoName, branchName string) (time.Time, error) {
url := joinURL(client.giteaRoot, giteaAPIRepos, repoOwner, repoName, "branches", branchName)
res, err := client.do(client.infoTimeout, url)
if err != nil {
return time.Time{}, err
}
if res.StatusCode() != fasthttp.StatusOK {
return time.Time{}, fmt.Errorf("unexpected status code '%d'", res.StatusCode())
}
return time.Parse(time.RFC3339, fastjson.GetString(res.Body(), "commit", "timestamp"))
}
func (client *Client) GiteaGetRepoDefaultBranch(repoOwner, repoName string) (string, error) {
url := joinURL(client.giteaRoot, giteaAPIRepos, repoOwner, repoName)
res, err := client.do(client.infoTimeout, url)
if err != nil {
return "", err
}
if res.StatusCode() != fasthttp.StatusOK {
return "", fmt.Errorf("unexpected status code '%d'", res.StatusCode())
}
return fastjson.GetString(res.Body(), "default_branch"), nil
}
func (client *Client) do(timeout time.Duration, url string) (*fasthttp.Response, error) {
req := fasthttp.AcquireRequest()
req.SetRequestURI(url)
req.Header.Set(fasthttp.HeaderAuthorization, "token "+client.giteaAPIToken)
res := fasthttp.AcquireResponse()
err := client.fastClient.DoTimeout(req, res, timeout)
return res, err
}