package gitea import ( "bytes" "encoding/json" "errors" "fmt" "io" "io/fs" "net/http" "net/url" "strings" "sync" "github.com/spf13/viper" ) type Client struct { serverURL string token string giteapages string } type pagesConfig struct { } type topicsResponse struct { Topics []string `json:"topics"` } func NewClient(serverURL, token, giteapages string) *Client { if giteapages == "" { giteapages = "gitea-pages" } return &Client{ serverURL: serverURL, token: token, giteapages: giteapages, } } func (c *Client) Open(name, ref string) (fs.File, error) { if ref == "" { ref = c.giteapages } owner, repo, filepath, err := splitName(name) if err != nil { return nil, err } if !c.allowsPages(owner, repo) { return nil, fs.ErrNotExist } if err := c.readConfig(owner, repo); err != nil { return nil, err } if !validRefs(ref) { return nil, fs.ErrNotExist } res, err := c.getRawFileOrLFS(owner, repo, filepath, ref) if err != nil { return nil, err } if strings.HasSuffix(filepath, ".md") { res, err = handleMD(res) if err != nil { return nil, err } } return &openFile{ content: res, name: filepath, }, nil } func (c *Client) getRawFileOrLFS(owner, repo, filepath, ref string) ([]byte, error) { var ( giteaURL string err error ) giteaURL, err = url.JoinPath(c.serverURL+"/api/v1/repos/", owner, repo, "media", filepath) if err != nil { return nil, err } giteaURL += "?ref=" + url.QueryEscape(ref) req, err := http.NewRequest(http.MethodGet, giteaURL, nil) if err != nil { return nil, err } req.Header.Add("Authorization", "token "+c.token) resp, err := http.DefaultClient.Do(req) if err != nil { return nil, err } switch resp.StatusCode { case http.StatusNotFound: return nil, fs.ErrNotExist case http.StatusOK: default: return nil, fmt.Errorf("unexpected status code '%d'", resp.StatusCode) } res, err := io.ReadAll(resp.Body) if err != nil { return nil, err } defer resp.Body.Close() return res, nil } var bufPool = sync.Pool{ New: func() any { return new(bytes.Buffer) }, } func handleMD(res []byte) ([]byte, error) { meta, resbody, err := extractFrontMatter(string(res)) if err != nil { return nil, err } resmd, err := markdown([]byte(resbody)) if err != nil { return nil, err } res = append([]byte("\n\n\n

"), []byte(meta["title"].(string))...) res = append(res, []byte("

")...) res = append(res, resmd...) res = append(res, []byte("")...) return res, nil } func (c *Client) repoTopics(owner, repo string) ([]string, error) { var ( giteaURL string err error ) giteaURL, err = url.JoinPath(c.serverURL+"/api/v1/repos/", owner, repo, "topics") if err != nil { return nil, err } req, err := http.NewRequest(http.MethodGet, giteaURL, nil) if err != nil { return nil, err } req.Header.Add("Authorization", "token "+c.token) resp, err := http.DefaultClient.Do(req) if err != nil { return nil, err } res, err := io.ReadAll(resp.Body) if err != nil { return nil, err } defer resp.Body.Close() t := topicsResponse{} json.Unmarshal(res, &t) return t.Topics, nil } func (c *Client) allowsPages(owner, repo string) bool { topics, err := c.repoTopics(owner, repo) if err != nil { return false } for _, topic := range topics { if topic == c.giteapages { return true } } return false } func (c *Client) readConfig(owner, repo string) error { cfg, err := c.getRawFileOrLFS(owner, repo, c.giteapages+".toml", c.giteapages) if err != nil && !errors.Is(err, fs.ErrNotExist) { return err } viper.SetConfigType("toml") viper.ReadConfig(bytes.NewBuffer(cfg)) return nil } func splitName(name string) (string, string, string, error) { parts := strings.Split(name, "/") // parts contains: ["owner", "repo", "filepath"] // return invalid path if not enough parts if len(parts) < 3 { return "", "", "", fs.ErrInvalid } owner := parts[0] repo := parts[1] filepath := strings.Join(parts[2:], "/") return owner, repo, filepath, nil } func validRefs(ref string) bool { validrefs := viper.GetStringSlice("allowedrefs") for _, r := range validrefs { if r == ref { return true } if r == "*" { return true } } return false }