forked from Upstream/caddy-gitea
273 lines
5.6 KiB
Go
273 lines
5.6 KiB
Go
package gitea
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import (
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"bytes"
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"fmt"
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"io"
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"io/fs"
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"net/http"
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"net/url"
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"strings"
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"sync"
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gclient "code.gitea.io/sdk/gitea"
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"github.com/spf13/viper"
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)
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type Client struct {
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serverURL string
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token string
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giteapages string
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giteapagesAllowAll string
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gc *gclient.Client
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}
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func NewClient(serverURL, token, giteapages, giteapagesAllowAll string) (*Client, error) {
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if giteapages == "" {
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giteapages = "gitea-pages"
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}
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if giteapagesAllowAll == "" {
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giteapagesAllowAll = "gitea-pages-allowall"
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}
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gc, err := gclient.NewClient(serverURL, gclient.SetToken(token), gclient.SetGiteaVersion(""))
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if err != nil {
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return nil, err
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}
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return &Client{
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serverURL: serverURL,
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token: token,
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gc: gc,
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giteapages: giteapages,
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giteapagesAllowAll: giteapagesAllowAll,
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}, nil
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}
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func (c *Client) Open(name, ref string) (fs.File, error) {
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owner, repo, filepath := splitName(name)
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// if repo is empty they want to have the gitea-pages repo
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if repo == "" {
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repo = c.giteapages
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filepath = "index.html"
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}
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// if filepath is empty they want to have the index.html
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if filepath == "" {
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filepath = "index.html"
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}
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// we need to check if the repo exists (and allows access)
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limited, allowall := c.allowsPages(owner, repo)
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if !limited && !allowall {
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// if we're checking the gitea-pages and it doesn't exist, return 404
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if repo == c.giteapages && !c.hasRepoBranch(owner, repo, c.giteapages) {
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return nil, fs.ErrNotExist
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}
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// the repo didn't exist but maybe it's a filepath in the gitea-pages repo
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// so we need to check if the gitea-pages repo exists
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filepath = repo
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repo = c.giteapages
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if ref == "" {
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ref = c.giteapages
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}
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limited, allowall = c.allowsPages(owner, repo)
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if !limited && !allowall || !c.hasRepoBranch(owner, repo, c.giteapages) {
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return nil, fs.ErrNotExist
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}
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}
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hasConfig := true
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if err := c.readConfig(owner, repo); err != nil {
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// we don't need a config for gitea-pages
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// no config is only exposing the gitea-pages branch
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if repo != c.giteapages && !allowall {
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return nil, err
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}
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hasConfig = false
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}
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// if we don't have a config and the repo is the gitea-pages
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// always overwrite the ref to the gitea-pages branch
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if !hasConfig && (repo == c.giteapages || ref == c.giteapages) {
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ref = c.giteapages
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} else if !validRefs(ref, allowall) {
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return nil, fs.ErrNotExist
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}
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res, err := c.getRawFileOrLFS(owner, repo, filepath, ref)
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if err != nil {
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return nil, err
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}
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if strings.HasSuffix(filepath, ".md") {
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res, err = handleMD(res)
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if err != nil {
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return nil, err
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}
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}
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return &openFile{
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content: res,
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name: filepath,
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}, nil
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}
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func (c *Client) getRawFileOrLFS(owner, repo, filepath, ref string) ([]byte, error) {
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var (
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giteaURL string
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err error
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)
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// TODO: make pr for go-sdk
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// gitea sdk doesn't support "media" type for lfs/non-lfs
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giteaURL, err = url.JoinPath(c.serverURL+"/api/v1/repos/", owner, repo, "media", filepath)
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if err != nil {
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return nil, err
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}
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giteaURL += "?ref=" + url.QueryEscape(ref)
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req, err := http.NewRequest(http.MethodGet, giteaURL, nil)
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if err != nil {
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return nil, err
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}
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req.Header.Add("Authorization", "token "+c.token)
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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return nil, err
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}
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switch resp.StatusCode {
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case http.StatusNotFound:
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return nil, fs.ErrNotExist
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case http.StatusOK:
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default:
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return nil, fmt.Errorf("unexpected status code '%d'", resp.StatusCode)
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}
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res, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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return res, nil
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}
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var bufPool = sync.Pool{
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New: func() any {
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return new(bytes.Buffer)
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},
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}
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func handleMD(res []byte) ([]byte, error) {
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meta, resbody, err := extractFrontMatter(string(res))
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if err != nil {
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return nil, err
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}
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resmd, err := markdown([]byte(resbody))
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if err != nil {
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return nil, err
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}
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title, _ := meta["title"].(string)
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res = append([]byte("<!DOCTYPE html>\n<html>\n<body>\n<h1>"), []byte(title)...)
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res = append(res, []byte("</h1>")...)
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res = append(res, resmd...)
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res = append(res, []byte("</body></html>")...)
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return res, nil
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}
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func (c *Client) repoTopics(owner, repo string) ([]string, error) {
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repos, _, err := c.gc.ListRepoTopics(owner, repo, gclient.ListRepoTopicsOptions{})
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return repos, err
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}
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func (c *Client) hasRepoBranch(owner, repo, branch string) bool {
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b, _, err := c.gc.GetRepoBranch(owner, repo, branch)
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if err != nil {
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return false
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}
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return b.Name == branch
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}
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func (c *Client) allowsPages(owner, repo string) (bool, bool) {
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topics, err := c.repoTopics(owner, repo)
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if err != nil {
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return false, false
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}
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for _, topic := range topics {
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if topic == c.giteapagesAllowAll {
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return true, true
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}
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}
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for _, topic := range topics {
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if topic == c.giteapages {
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return true, false
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}
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}
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return false, false
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}
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func (c *Client) readConfig(owner, repo string) error {
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cfg, err := c.getRawFileOrLFS(owner, repo, c.giteapages+".toml", c.giteapages)
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if err != nil {
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return err
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}
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viper.SetConfigType("toml")
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return viper.ReadConfig(bytes.NewBuffer(cfg))
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}
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func splitName(name string) (string, string, string) {
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parts := strings.Split(name, "/")
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// parts contains: ["owner", "repo", "filepath"]
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switch len(parts) {
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case 1:
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return parts[0], "", ""
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case 2:
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return parts[0], parts[1], ""
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default:
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return parts[0], parts[1], strings.Join(parts[2:], "/")
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}
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}
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func validRefs(ref string, allowall bool) bool {
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if allowall {
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return true
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}
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validrefs := viper.GetStringSlice("allowedrefs")
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for _, r := range validrefs {
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if r == ref {
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return true
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}
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if r == "*" {
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return true
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}
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}
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return false
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}
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