forked from Upstream/caddy-gitea
239 lines
4.1 KiB
Go
239 lines
4.1 KiB
Go
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package gitea
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import (
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"bytes"
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"encoding/json"
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"errors"
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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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"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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}
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type pagesConfig struct {
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}
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type topicsResponse struct {
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Topics []string `json:"topics"`
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}
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func NewClient(serverURL, token string) *Client {
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return &Client{
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serverURL: serverURL,
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token: token,
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}
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}
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func (c *Client) Open(name, ref string) (fs.File, error) {
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if ref == "" {
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ref = "gitea-pages"
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}
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owner, repo, filepath, err := splitName(name)
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if err != nil {
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return nil, err
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}
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if !c.allowsPages(owner, repo) {
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return nil, fs.ErrNotExist
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}
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if err := c.readConfig(owner, repo); err != nil {
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return nil, err
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}
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if !validRefs(ref) {
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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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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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res = append([]byte("<!DOCTYPE html>\n<html>\n<body>\n<h1>"), []byte(meta["title"].(string))...)
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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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var (
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giteaURL string
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err error
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)
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giteaURL, err = url.JoinPath(c.serverURL+"/api/v1/repos/", owner, repo, "topics")
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if err != nil {
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return nil, err
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}
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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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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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t := topicsResponse{}
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json.Unmarshal(res, &t)
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return t.Topics, nil
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}
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func (c *Client) allowsPages(owner, repo string) bool {
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topics, err := c.repoTopics(owner, repo)
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if err != nil {
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return false
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}
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for _, topic := range topics {
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if topic == "gitea-pages" {
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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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func (c *Client) readConfig(owner, repo string) error {
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cfg, err := c.getRawFileOrLFS(owner, repo, "gitea-pages.toml", "gitea-pages")
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if err != nil && !errors.Is(err, fs.ErrNotExist) {
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return err
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}
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viper.SetConfigType("toml")
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viper.ReadConfig(bytes.NewBuffer(cfg))
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return nil
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}
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func splitName(name string) (string, string, string, error) {
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parts := strings.Split(name, "/")
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// parts contains: ["owner", "repo", "filepath"]
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// return invalid path if not enough parts
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if len(parts) < 3 {
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return "", "", "", fs.ErrInvalid
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}
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owner := parts[0]
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repo := parts[1]
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filepath := strings.Join(parts[2:], "/")
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return owner, repo, filepath, nil
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}
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func validRefs(ref string) bool {
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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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