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|
package main
import (
"bytes"
"embed"
"fmt"
"html/template"
"io/fs"
"log"
"net/http"
"os"
"path/filepath"
"strconv"
"strings"
"time"
"github.com/microcosm-cc/bluemonday"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/extension"
)
//go:embed templates/*.html
var templateFS embed.FS
//go:embed static
var staticFS embed.FS
type Server struct {
store *Store
root string
host string
open bool
pages map[string]*template.Template
markdown goldmark.Markdown
policy *bluemonday.Policy
}
type page struct {
Title string
User *User
Host string
Error string
Data any
}
func newServer(store *Store, root, host string, open bool) *Server {
s := &Server{store: store, root: root, host: host, open: open, pages: map[string]*template.Template{}}
funcs := template.FuncMap{
"short": func(h string) string {
if len(h) > 10 {
return h[:10]
}
return h
},
"ago": ago,
"size": humanSize,
"date": func(t time.Time) string { return t.UTC().Format("2006-01-02 15:04") },
"lines": func(b []byte) []string {
s := strings.TrimSuffix(string(b), "\n")
return strings.Split(s, "\n")
},
"inc": func(i int) int { return i + 1 },
"join": func(parts []string, upto int) string { return strings.Join(parts[:upto], "/") },
"string": func(b []byte) string { return string(b) },
}
names, _ := fs.Glob(templateFS, "templates/*.html")
for _, name := range names {
base := filepath.Base(name)
if base == "layout.html" {
continue
}
s.pages[strings.TrimSuffix(base, ".html")] = template.Must(template.New("layout.html").Funcs(funcs).ParseFS(templateFS, "templates/layout.html", name))
}
s.markdown = goldmark.New(goldmark.WithExtensions(extension.GFM))
s.policy = bluemonday.UGCPolicy()
return s
}
func (s *Server) render(w http.ResponseWriter, r *http.Request, name string, p page) {
p.Host = s.host
if p.User == nil {
p.User = s.current(r)
}
t, ok := s.pages[name]
if !ok {
http.Error(w, "missing template "+name, 500)
return
}
var buf bytes.Buffer
if err := t.Execute(&buf, p); err != nil {
log.Printf("render %s: %v", name, err)
http.Error(w, "template error", 500)
return
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
buf.WriteTo(w)
}
func (s *Server) fail(w http.ResponseWriter, r *http.Request, code int, msg string) {
w.WriteHeader(code)
s.render(w, r, "error", page{Title: msg, Error: msg})
}
func (s *Server) current(r *http.Request) *User {
c, err := r.Cookie("session")
if err != nil {
return nil
}
u, err := s.store.SessionUser(c.Value)
if err != nil {
return nil
}
return &u
}
func (s *Server) handler() http.Handler {
mux := http.NewServeMux()
static, _ := fs.Sub(staticFS, "static")
mux.Handle("GET /static/", http.StripPrefix("/static/", http.FileServerFS(static)))
mux.HandleFunc("GET /{$}", s.index)
mux.HandleFunc("GET /login", s.loginForm)
mux.HandleFunc("POST /login", s.login)
mux.HandleFunc("POST /logout", s.logout)
mux.HandleFunc("GET /register", s.registerForm)
mux.HandleFunc("POST /register", s.register)
mux.HandleFunc("GET /create", s.createForm)
mux.HandleFunc("POST /create", s.create)
mux.HandleFunc("GET /settings", s.settings)
mux.HandleFunc("POST /settings/keys", s.addKey)
mux.HandleFunc("POST /settings/keys/{id}/delete", s.deleteKey)
mux.HandleFunc("POST /settings/tokens", s.addToken)
mux.HandleFunc("POST /settings/tokens/{id}/delete", s.deleteToken)
mux.HandleFunc("POST /settings/password", s.password)
mux.HandleFunc("/", s.route)
cop := http.NewCrossOriginProtection()
return cop.Handler(mux)
}
func (s *Server) index(w http.ResponseWriter, r *http.Request) {
user := s.current(r)
var repos []Repo
var err error
if user != nil {
repos, err = s.store.ReposByOwner(user.ID, true)
} else {
repos, err = s.store.RecentRepos(30)
}
if err != nil {
s.fail(w, r, 500, err.Error())
return
}
users, public := s.store.Stats()
s.render(w, r, "index", page{Title: s.host, User: user, Data: map[string]any{"Repos": repos, "Users": users, "Public": public}})
}
func (s *Server) loginForm(w http.ResponseWriter, r *http.Request) {
s.render(w, r, "login", page{Title: "log in"})
}
func (s *Server) login(w http.ResponseWriter, r *http.Request) {
u, ok := s.store.CheckPassword(strings.TrimSpace(r.FormValue("name")), r.FormValue("password"))
if !ok {
w.WriteHeader(401)
s.render(w, r, "login", page{Title: "log in", Error: "wrong name or password"})
return
}
s.startSession(w, u)
http.Redirect(w, r, "/", http.StatusSeeOther)
}
func (s *Server) startSession(w http.ResponseWriter, u User) {
id, err := s.store.CreateSession(u.ID)
if err != nil {
return
}
http.SetCookie(w, &http.Cookie{Name: "session", Value: id, Path: "/", HttpOnly: true, Secure: true, SameSite: http.SameSiteLaxMode, MaxAge: 90 * 86400})
}
func (s *Server) logout(w http.ResponseWriter, r *http.Request) {
if c, err := r.Cookie("session"); err == nil {
s.store.DeleteSession(c.Value)
}
http.SetCookie(w, &http.Cookie{Name: "session", Value: "", Path: "/", MaxAge: -1})
http.Redirect(w, r, "/", http.StatusSeeOther)
}
func (s *Server) registerForm(w http.ResponseWriter, r *http.Request) {
s.render(w, r, "register", page{Title: "register", Data: map[string]any{"Open": s.open, "Invite": r.URL.Query().Get("invite")}})
}
func (s *Server) register(w http.ResponseWriter, r *http.Request) {
invite := strings.TrimSpace(r.FormValue("invite"))
retry := func(msg string) {
w.WriteHeader(400)
s.render(w, r, "register", page{Title: "register", Error: msg, Data: map[string]any{"Open": s.open, "Invite": invite}})
}
if !s.open && !s.store.UseInvite(invite) {
retry("that invite is invalid or already used")
return
}
u, err := s.store.CreateUser(strings.TrimSpace(r.FormValue("name")), r.FormValue("password"))
if err != nil {
retry(err.Error())
return
}
s.startSession(w, u)
http.Redirect(w, r, "/settings", http.StatusSeeOther)
}
func (s *Server) require(w http.ResponseWriter, r *http.Request) *User {
u := s.current(r)
if u == nil {
http.Redirect(w, r, "/login", http.StatusSeeOther)
}
return u
}
func (s *Server) createForm(w http.ResponseWriter, r *http.Request) {
if u := s.require(w, r); u != nil {
s.render(w, r, "create", page{Title: "new repository", User: u})
}
}
func (s *Server) create(w http.ResponseWriter, r *http.Request) {
u := s.require(w, r)
if u == nil {
return
}
name := strings.TrimSpace(r.FormValue("name"))
repo, err := s.store.CreateRepo(*u, name, strings.TrimSpace(r.FormValue("description")), r.FormValue("private") == "on")
if err != nil {
w.WriteHeader(400)
s.render(w, r, "create", page{Title: "new repository", User: u, Error: err.Error()})
return
}
dir := s.repoDir(repo)
if err := os.MkdirAll(filepath.Dir(dir), 0o755); err == nil {
err = initRepo(dir)
}
if err != nil {
s.store.DeleteRepo(repo.ID)
s.fail(w, r, 500, err.Error())
return
}
http.Redirect(w, r, "/"+repo.Path(), http.StatusSeeOther)
}
func (s *Server) repoDir(repo Repo) string {
return filepath.Join(s.root, "repos", repo.Owner.Name, repo.Name+".git")
}
func (s *Server) settings(w http.ResponseWriter, r *http.Request) {
u := s.require(w, r)
if u == nil {
return
}
keys, _ := s.store.Keys(u.ID)
tokens, _ := s.store.Tokens(u.ID)
s.render(w, r, "settings", page{Title: "settings", User: u, Error: r.URL.Query().Get("error"),
Data: map[string]any{"Keys": keys, "Tokens": tokens, "NewToken": r.URL.Query().Get("token")}})
}
func (s *Server) addKey(w http.ResponseWriter, r *http.Request) {
u := s.require(w, r)
if u == nil {
return
}
if err := s.store.AddKey(u.ID, strings.TrimSpace(r.FormValue("title")), r.FormValue("key")); err != nil {
http.Redirect(w, r, "/settings?error="+template.URLQueryEscaper(err.Error()), http.StatusSeeOther)
return
}
http.Redirect(w, r, "/settings", http.StatusSeeOther)
}
func (s *Server) deleteKey(w http.ResponseWriter, r *http.Request) {
u := s.require(w, r)
if u == nil {
return
}
id, _ := strconv.ParseInt(r.PathValue("id"), 10, 64)
s.store.DeleteKey(u.ID, id)
http.Redirect(w, r, "/settings", http.StatusSeeOther)
}
func (s *Server) addToken(w http.ResponseWriter, r *http.Request) {
u := s.require(w, r)
if u == nil {
return
}
token, err := s.store.CreateToken(u.ID, strings.TrimSpace(r.FormValue("title")))
if err != nil {
http.Redirect(w, r, "/settings?error="+template.URLQueryEscaper(err.Error()), http.StatusSeeOther)
return
}
http.Redirect(w, r, "/settings?token="+token, http.StatusSeeOther)
}
func (s *Server) deleteToken(w http.ResponseWriter, r *http.Request) {
u := s.require(w, r)
if u == nil {
return
}
id, _ := strconv.ParseInt(r.PathValue("id"), 10, 64)
s.store.DeleteToken(u.ID, id)
http.Redirect(w, r, "/settings", http.StatusSeeOther)
}
func (s *Server) password(w http.ResponseWriter, r *http.Request) {
u := s.require(w, r)
if u == nil {
return
}
if _, ok := s.store.CheckPassword(u.Name, r.FormValue("current")); !ok {
http.Redirect(w, r, "/settings?error=current+password+is+wrong", http.StatusSeeOther)
return
}
if err := s.store.SetPassword(u.ID, r.FormValue("password")); err != nil {
http.Redirect(w, r, "/settings?error="+template.URLQueryEscaper(err.Error()), http.StatusSeeOther)
return
}
http.Redirect(w, r, "/settings", http.StatusSeeOther)
}
func (s *Server) route(w http.ResponseWriter, r *http.Request) {
if !strings.HasPrefix(r.URL.Path, "/~") {
s.fail(w, r, 404, "page not found")
return
}
parts := strings.SplitN(strings.TrimPrefix(r.URL.Path, "/~"), "/", 3)
owner, err := s.store.UserByName(parts[0])
if err != nil {
s.fail(w, r, 404, "no such user")
return
}
user := s.current(r)
if len(parts) == 1 || (len(parts) == 2 && parts[1] == "") {
repos, err := s.store.ReposByOwner(owner.ID, user != nil && user.ID == owner.ID)
if err != nil {
s.fail(w, r, 500, err.Error())
return
}
s.render(w, r, "user", page{Title: "~" + owner.Name, User: user, Data: map[string]any{"Owner": owner, "Repos": repos}})
return
}
name := parts[1]
rest := ""
if len(parts) == 3 {
rest = parts[2]
}
if strings.HasSuffix(name, ".git") || isSmart(r, rest) {
s.smart(w, r, owner, strings.TrimSuffix(name, ".git"), rest)
return
}
repo, err := s.store.RepoByPath(owner.Name, name)
if err != nil {
s.fail(w, r, 404, "no such repository")
return
}
if repo.Private && (user == nil || user.ID != owner.ID) {
s.fail(w, r, 404, "no such repository")
return
}
switch {
case rest == "" && r.Method == "GET":
s.summary(w, r, repo)
case rest == "settings" && r.Method == "GET":
s.repoSettings(w, r, repo)
case rest == "settings" && r.Method == "POST":
s.updateRepo(w, r, repo)
case rest == "delete" && r.Method == "POST":
s.deleteRepo(w, r, repo)
case rest == "refs" && r.Method == "GET":
s.refs(w, r, repo)
case strings.HasPrefix(rest, "tree/") && r.Method == "GET":
s.tree(w, r, repo, strings.TrimPrefix(rest, "tree/"))
case strings.HasPrefix(rest, "blob/") && r.Method == "GET":
s.tree(w, r, repo, strings.TrimPrefix(rest, "blob/"))
case strings.HasPrefix(rest, "raw/") && r.Method == "GET":
s.raw(w, r, repo, strings.TrimPrefix(rest, "raw/"))
case strings.HasPrefix(rest, "log/") && r.Method == "GET":
s.log(w, r, repo, strings.TrimPrefix(rest, "log/"))
case rest == "log" && r.Method == "GET":
s.log(w, r, repo, "")
case strings.HasPrefix(rest, "commit/") && r.Method == "GET":
s.commit(w, r, repo, strings.TrimPrefix(rest, "commit/"))
default:
s.fail(w, r, 404, "page not found")
}
}
type repoPage struct {
Repo Repo
Ref string
Commit string
Owner bool
Empty bool
}
func (s *Server) repoPage(r *http.Request, repo Repo, ref string) (repoPage, Git, error) {
g := Git{Dir: s.repoDir(repo)}
user := s.current(r)
rp := repoPage{Repo: repo, Owner: user != nil && user.ID == repo.Owner.ID}
if g.Empty() {
rp.Empty = true
rp.Ref = g.Head()
return rp, g, nil
}
if ref == "" {
ref = g.Head()
}
commit, err := g.Resolve(ref)
if err != nil {
return rp, g, err
}
rp.Ref = ref
rp.Commit = commit
return rp, g, nil
}
func (s *Server) summary(w http.ResponseWriter, r *http.Request, repo Repo) {
rp, g, err := s.repoPage(r, repo, "")
if err != nil {
s.fail(w, r, 404, "no such ref")
return
}
data := map[string]any{"Page": rp}
if !rp.Empty {
commits, _ := g.Log(rp.Commit, 8, "")
data["Commits"] = commits
branches, _ := g.Refs("refs/heads")
tags, _ := g.Refs("refs/tags")
data["Branches"] = branches
data["Tags"] = tags
name, content := g.Readme(rp.Commit)
if name != "" {
data["ReadmeName"] = name
if strings.HasSuffix(strings.ToLower(name), ".md") {
data["Readme"] = s.renderMarkdown(content)
} else {
data["ReadmeText"] = string(content)
}
}
}
s.render(w, r, "repo", page{Title: repo.Path(), Data: data})
}
func (s *Server) renderMarkdown(src []byte) template.HTML {
var buf bytes.Buffer
if err := s.markdown.Convert(src, &buf); err != nil {
return template.HTML("<pre>" + template.HTMLEscapeString(string(src)) + "</pre>")
}
return template.HTML(s.policy.SanitizeBytes(buf.Bytes()))
}
func (s *Server) splitRef(g Git, spec string) (string, string, bool) {
spec = strings.Trim(spec, "/")
if spec == "" {
return "", "", false
}
parts := strings.Split(spec, "/")
for i := len(parts); i >= 1; i-- {
ref := strings.Join(parts[:i], "/")
if _, err := g.Resolve(ref); err == nil {
return ref, strings.Join(parts[i:], "/"), true
}
}
return "", "", false
}
func (s *Server) tree(w http.ResponseWriter, r *http.Request, repo Repo, spec string) {
g := Git{Dir: s.repoDir(repo)}
ref, filePath, ok := s.splitRef(g, spec)
if !ok {
s.fail(w, r, 404, "no such ref")
return
}
filePath, ok = cleanPath(filePath)
if !ok {
s.fail(w, r, 404, "no such path")
return
}
rp, g, err := s.repoPage(r, repo, ref)
if err != nil {
s.fail(w, r, 404, "no such ref")
return
}
crumbs := strings.Split(filePath, "/")
if filePath == "" {
crumbs = nil
}
data := map[string]any{"Page": rp, "Path": filePath, "Crumbs": crumbs}
switch g.Kind(rp.Commit, filePath) {
case "tree", "commit":
entries, err := g.Tree(rp.Commit, filePath)
if err != nil {
s.fail(w, r, 404, "no such path")
return
}
data["Entries"] = entries
s.render(w, r, "tree", page{Title: repo.Path() + "/" + filePath, Data: data})
case "blob":
content, err := g.Blob(rp.Commit, filePath)
if err != nil {
s.fail(w, r, 404, "no such path")
return
}
data["Size"] = int64(len(content))
if isBinary(content) {
data["Binary"] = true
} else if len(content) > 1<<20 {
data["Large"] = true
} else {
data["Content"] = content
}
s.render(w, r, "blob", page{Title: repo.Path() + "/" + filePath, Data: data})
default:
s.fail(w, r, 404, "no such path")
}
}
func (s *Server) raw(w http.ResponseWriter, r *http.Request, repo Repo, spec string) {
g := Git{Dir: s.repoDir(repo)}
ref, filePath, ok := s.splitRef(g, spec)
if !ok {
s.fail(w, r, 404, "no such ref")
return
}
filePath, ok = cleanPath(filePath)
if !ok || filePath == "" {
s.fail(w, r, 404, "no such path")
return
}
commit, err := g.Resolve(ref)
if err != nil {
s.fail(w, r, 404, "no such ref")
return
}
content, err := g.Blob(commit, filePath)
if err != nil {
s.fail(w, r, 404, "no such path")
return
}
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
w.Header().Set("X-Content-Type-Options", "nosniff")
w.Header().Set("Content-Disposition", "inline; filename=\""+filepath.Base(filePath)+"\"")
w.Write(content)
}
func (s *Server) log(w http.ResponseWriter, r *http.Request, repo Repo, ref string) {
ref = strings.Trim(ref, "/")
rp, g, err := s.repoPage(r, repo, ref)
if err != nil {
s.fail(w, r, 404, "no such ref")
return
}
data := map[string]any{"Page": rp}
if !rp.Empty {
start := rp.Commit
if from := r.URL.Query().Get("from"); from != "" {
if start, err = g.Resolve(from); err != nil {
s.fail(w, r, 404, "no such commit")
return
}
}
const per = 50
commits, err := g.Log(start, per+1, "")
if err != nil {
s.fail(w, r, 500, err.Error())
return
}
if len(commits) > per {
data["Next"] = commits[per].Hash
commits = commits[:per]
}
data["Commits"] = commits
}
s.render(w, r, "log", page{Title: repo.Path() + " log", Data: data})
}
func (s *Server) commit(w http.ResponseWriter, r *http.Request, repo Repo, hash string) {
rp, g, err := s.repoPage(r, repo, hash)
if err != nil {
s.fail(w, r, 404, "no such commit")
return
}
c, err := g.Commit(rp.Commit)
if err != nil {
s.fail(w, r, 404, "no such commit")
return
}
files, err := g.Diff(rp.Commit)
if err != nil {
s.fail(w, r, 500, err.Error())
return
}
added, removed := 0, 0
for _, f := range files {
added += f.Added
removed += f.Removed
}
s.render(w, r, "commit", page{Title: c.Subject, Data: map[string]any{"Page": rp, "Commit": c, "Files": files, "Added": added, "Removed": removed}})
}
func (s *Server) refs(w http.ResponseWriter, r *http.Request, repo Repo) {
rp, g, err := s.repoPage(r, repo, "")
if err != nil {
s.fail(w, r, 404, "no such ref")
return
}
branches, _ := g.Refs("refs/heads")
tags, _ := g.Refs("refs/tags")
s.render(w, r, "refs", page{Title: repo.Path() + " refs", Data: map[string]any{"Page": rp, "Branches": branches, "Tags": tags}})
}
func (s *Server) repoSettings(w http.ResponseWriter, r *http.Request, repo Repo) {
rp, _, _ := s.repoPage(r, repo, "")
if !rp.Owner {
s.fail(w, r, 403, "not your repository")
return
}
s.render(w, r, "reposettings", page{Title: repo.Path() + " settings", Data: map[string]any{"Page": rp}})
}
func (s *Server) updateRepo(w http.ResponseWriter, r *http.Request, repo Repo) {
rp, _, _ := s.repoPage(r, repo, "")
if !rp.Owner {
s.fail(w, r, 403, "not your repository")
return
}
if err := s.store.UpdateRepo(repo.ID, strings.TrimSpace(r.FormValue("description")), r.FormValue("private") == "on"); err != nil {
s.fail(w, r, 500, err.Error())
return
}
http.Redirect(w, r, "/"+repo.Path(), http.StatusSeeOther)
}
func (s *Server) deleteRepo(w http.ResponseWriter, r *http.Request, repo Repo) {
rp, _, _ := s.repoPage(r, repo, "")
if !rp.Owner {
s.fail(w, r, 403, "not your repository")
return
}
if r.FormValue("confirm") != repo.Name {
http.Redirect(w, r, "/"+repo.Path()+"/settings", http.StatusSeeOther)
return
}
if err := s.store.DeleteRepo(repo.ID); err != nil {
s.fail(w, r, 500, err.Error())
return
}
os.RemoveAll(s.repoDir(repo))
http.Redirect(w, r, "/~"+repo.Owner.Name, http.StatusSeeOther)
}
func ago(t time.Time) string {
d := time.Since(t)
switch {
case d < time.Minute:
return "just now"
case d < time.Hour:
return fmt.Sprintf("%d minutes ago", int(d.Minutes()))
case d < 2*time.Hour:
return "an hour ago"
case d < 24*time.Hour:
return fmt.Sprintf("%d hours ago", int(d.Hours()))
case d < 48*time.Hour:
return "yesterday"
case d < 30*24*time.Hour:
return fmt.Sprintf("%d days ago", int(d.Hours()/24))
case d < 365*24*time.Hour:
return fmt.Sprintf("%d months ago", int(d.Hours()/24/30))
default:
return fmt.Sprintf("%d years ago", int(d.Hours()/24/365))
}
}
func humanSize(n int64) string {
switch {
case n < 1024:
return fmt.Sprintf("%d B", n)
case n < 1<<20:
return fmt.Sprintf("%.1f KiB", float64(n)/1024)
default:
return fmt.Sprintf("%.1f MiB", float64(n)/(1<<20))
}
}
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