internal/httpd/accounts.go
660 lines · 22319 bytes
1package httpd
2
3import (
4 "fmt"
5 "html/template"
6 "log"
7 "net/http"
8 "path"
9 "slices"
10 "strconv"
11 "strings"
12 "time"
13
14 gossh "golang.org/x/crypto/ssh"
15
16 "gitbay.org/gitbay/internal/control"
17 "gitbay.org/gitbay/internal/gitutil"
18 "gitbay.org/gitbay/internal/policy"
19 "gitbay.org/gitbay/internal/protocol"
20 "gitbay.org/gitbay/internal/store"
21)
22
23const sessionCookie = "gitbay_session"
24
25// sessionSameSite is Lax so a login link followed from a mail client keeps
26// its session through the redirect. Cross-site POSTs are refused by
27// checkOrigin and carry no Lax cookie anyway.
28const sessionSameSite = http.SameSiteLaxMode
29
30// badLoginToken is what every refused /login?token= gets, whatever the
31// reason. The reasons differ in whether the account exists.
32const badLoginToken = "that login link is invalid, expired, or already used — mint a new one"
33
34// viewer returns the logged-in user, or a zero User for anonymous visitors.
35// Only meaningful in accounts mode; in view_only no session route exists so
36// every request is anonymous.
37func (s *Server) viewer(r *http.Request) store.User {
38 ck, err := r.Cookie(sessionCookie)
39 if err != nil {
40 return store.User{}
41 }
42 u, err := s.st.WebSessionUser(store.HashToken(ck.Value))
43 if err != nil {
44 return store.User{}
45 }
46 return u
47}
48
49// requireUser wraps a handler that needs a session.
50func (s *Server) requireUser(h func(http.ResponseWriter, *http.Request, store.User)) http.HandlerFunc {
51 return func(w http.ResponseWriter, r *http.Request) {
52 u := s.viewer(r)
53 if u.ID == 0 {
54 if r.Method == http.MethodGet {
55 s.setNext(w, r.URL.RequestURI())
56 }
57 http.Redirect(w, r, "/login", http.StatusSeeOther)
58 return
59 }
60 h(w, r, u)
61 }
62}
63
64// checkOrigin rejects cross-site POSTs. It is the primary CSRF defense:
65// sessions use SameSite=Lax, which withholds the cookie from a cross-site
66// POST but not from a cross-site top-level GET.
67func (s *Server) checkOrigin(h http.HandlerFunc) http.HandlerFunc {
68 return func(w http.ResponseWriter, r *http.Request) {
69 if origin := r.Header.Get("Origin"); origin != "" && origin != "null" {
70 host := strings.TrimPrefix(strings.TrimPrefix(origin, "https://"), "http://")
71 if host != r.Host {
72 http.Error(w, "cross-origin request refused", http.StatusForbidden)
73 return
74 }
75 }
76 h(w, r)
77 }
78}
79
80// renderLogin draws the login page. Mode carries the registration mode so
81// the page can tell a brand-new visitor how to get an account. EmailLogin
82// says whether this instance can mail a link; Sent switches the page to the
83// confirmation that follows a request.
84func (s *Server) renderLogin(w http.ResponseWriter, errMsg string, sent bool, next string) {
85 s.render(w, "login.html", struct {
86 basePage
87 Mode string // closed | invite | open
88 Error string
89 EmailLogin bool
90 Sent bool
91 Next string
92 }{basePage{Site: s.siteName(), Host: s.cfg.SiteHost()},
93 s.cfg.Registration.Mode, errMsg, s.emailLoginEnabled(), sent, next})
94}
95
96// emailLoginEnabled reports whether a link can be mailed at all. There is no
97// separate switch: the capability is exactly the SMTP the instance already
98// configured for verification and notification mail.
99func (s *Server) emailLoginEnabled() bool {
100 return s.cfg.Web.Mode == "accounts" && s.cfg.Mail.SMTPHost != ""
101}
102
103// loginSubmit mails a one-time login link. The response is the same page
104// whatever happened, including when nothing happened.
105func (s *Server) loginSubmit(w http.ResponseWriter, r *http.Request) {
106 if !s.emailLoginEnabled() {
107 s.notFound(w, r)
108 return
109 }
110 // The per-account bound lives in the store and survives a restart; this
111 // one stops a single source from spending every account's budget.
112 if allowed, wait := s.apiLimit.allow("login"+s.clientIP(r), true); !allowed {
113 w.Header().Set("Retry-After", strconv.Itoa(int(wait.Seconds())+1))
114 http.Error(w, "too many login requests; wait a moment", http.StatusTooManyRequests)
115 return
116 }
117 if err := control.RequestLoginLink(s.cfg, s.st, r.FormValue("identifier")); err != nil {
118 log.Printf("login link: %v", err)
119 }
120 s.renderLogin(w, "", true, "")
121}
122
123func (s *Server) login(w http.ResponseWriter, r *http.Request) {
124 token := r.URL.Query().Get("token")
125 if token == "" {
126 s.renderLogin(w, "", false, s.peekNext(r))
127 return
128 }
129 userID, err := s.st.ConsumeLoginToken(store.HashToken(token))
130 if err != nil {
131 s.renderLogin(w, badLoginToken, false, "")
132 return
133 }
134 // A token minted before the account was suspended is still consumable,
135 // and the session it would create renders every page the account can
136 // read. Checking here covers every mint path. The message is the one a
137 // bad token gets: a distinct one would confirm the account exists.
138 if u, err := s.st.UserByID(userID); err != nil || u.Disabled {
139 s.renderLogin(w, badLoginToken, false, "")
140 return
141 }
142 sessTok, sessHash, err := store.NewToken()
143 if err != nil {
144 http.Error(w, "internal error", http.StatusInternalServerError)
145 return
146 }
147 // Seven days is the cap; the store ends it sooner after
148 // store.WebSessionIdle without a request.
149 if err := s.st.CreateWebSession(sessHash, userID, 7*24*time.Hour); err != nil {
150 http.Error(w, "internal error", http.StatusInternalServerError)
151 return
152 }
153 http.SetCookie(w, s.sessionCookieFor(sessTok))
154 dest := s.takeNext(w, r)
155 if dest == "" {
156 dest = "/"
157 }
158 http.Redirect(w, r, dest, http.StatusSeeOther)
159}
160
161// sessionCookieFor is the cookie a new session ships in. Secure follows TLS
162// the way clearCookie does, so a plain-HTTP deployment still works.
163func (s *Server) sessionCookieFor(tok string) *http.Cookie {
164 return &http.Cookie{
165 Name: sessionCookie, Value: tok, Path: "/",
166 HttpOnly: true, SameSite: sessionSameSite,
167 Secure: s.cfg.HTTP.TLS != "off",
168 MaxAge: 7 * 24 * 3600,
169 }
170}
171
172// logoutForm is GET /logout: the confirmation the rail's signout square
173// and the More menu link to, so the session does not end on one stray
174// click. The button posts to the same path.
175func (s *Server) logoutForm(w http.ResponseWriter, r *http.Request, u store.User) {
176 s.render(w, "logout.html", struct {
177 basePage
178 }{s.baseFor(u)})
179}
180
181func (s *Server) logout(w http.ResponseWriter, r *http.Request) {
182 if ck, err := r.Cookie(sessionCookie); err == nil {
183 s.st.DeleteWebSession(store.HashToken(ck.Value))
184 }
185 http.SetCookie(w, s.clearCookie(sessionCookie, sessionSameSite))
186 http.Redirect(w, r, "/", http.StatusSeeOther)
187}
188
189// adminOrgs lists organizations the user administers, for owner pickers.
190func (s *Server) adminOrgs(u store.User) []string {
191 var out []string
192 if orgs, err := s.st.ListOrgsForUser(u.ID); err == nil {
193 for _, o := range orgs {
194 if o.Role == "admin" {
195 out = append(out, o.Username)
196 }
197 }
198 }
199 return out
200}
201
202func (s *Server) renderNewRepo(w http.ResponseWriter, u store.User, errMsg string) {
203 s.render(w, "new.html", struct {
204 basePage
205 Orgs []string
206 Error string
207 }{s.baseFor(u), s.adminOrgs(u), errMsg})
208}
209
210func (s *Server) newRepoForm(w http.ResponseWriter, r *http.Request, u store.User) {
211 s.renderNewRepo(w, u, "")
212}
213
214// newSubmit creates a repository or an organization: /new carries both
215// forms, told apart by the org form's field. An organization's page is
216// the redirect, the same as org-create from anywhere else.
217func (s *Server) newSubmit(w http.ResponseWriter, r *http.Request, u store.User) {
218 if r.FormValue("field") == "org-create" {
219 name := strings.TrimSpace(r.FormValue("name"))
220 if _, msg, ok := s.runControl(u, []string{"org", "create", name}); !ok {
221 s.renderNewRepo(w, u, msg)
222 return
223 }
224 http.Redirect(w, r, "/"+name, http.StatusSeeOther)
225 return
226 }
227 owner := r.FormValue("owner")
228 if owner == "" {
229 owner = u.Username
230 }
231 name := r.FormValue("name")
232 argv := []string{"repo", "create", owner + "/" + name}
233 if r.FormValue("visibility") == "private" {
234 argv = append(argv, "--private")
235 }
236 if _, msg, ok := s.runControl(u, argv); !ok {
237 s.renderNewRepo(w, u, msg)
238 return
239 }
240 http.Redirect(w, r, "/"+owner+"/"+name, http.StatusSeeOther)
241}
242
243// pinToggle pins or unpins the repo for the logged-in viewer.
244func (s *Server) pinToggle(w http.ResponseWriter, r *http.Request, u store.User) {
245 repo, ok := s.repoForUser(w, r, u, policy.CanRead)
246 if !ok {
247 return
248 }
249 if s.st.IsPinned(u.ID, repo.ID) {
250 s.st.UnpinRepo(u.ID, repo.ID)
251 } else {
252 s.st.PinRepo(u.ID, repo.ID)
253 }
254 http.Redirect(w, r, "/"+repo.Path(), http.StatusSeeOther)
255}
256
257// bookmarkToggle saves or unsaves a repository for the viewer. Read
258// access is all a bookmark needs — it is something you do to someone
259// else's repository — and repoForUser 404s a private one either way.
260func (s *Server) bookmarkToggle(w http.ResponseWriter, r *http.Request, u store.User) {
261 repo, ok := s.repoForUser(w, r, u, policy.CanRead)
262 if !ok {
263 return
264 }
265 verb := "bookmark"
266 if s.st.IsBookmarked(u.ID, repo.ID) {
267 verb = "unbookmark"
268 }
269 if _, msg, ok := s.runControl(u, []string{"repo", verb, repo.Path()}); !ok {
270 s.setFlash(w, msg)
271 }
272 http.Redirect(w, r, "/"+repo.Path(), http.StatusSeeOther)
273}
274
275// bookmarksPage lists what the viewer has saved.
276// bookmarksPage keeps /bookmarks working: the list is a tab on the
277// viewer's own profile now, so there is one page of it rather than two
278// showing the same rows.
279func (s *Server) bookmarksPage(w http.ResponseWriter, r *http.Request, u store.User) {
280 http.Redirect(w, r, "/"+u.Username+"/-/bookmarks", http.StatusSeeOther)
281}
282
283// renderFork draws the fork form: where the copy lands and what it is
284// called. owner and name are what the field should hold, which after a
285// refusal is what was submitted.
286func (s *Server) renderFork(w http.ResponseWriter, u store.User, repo store.Repo, owner, name, errMsg string) {
287 s.render(w, "fork.html", struct {
288 basePage
289 Repo store.Repo
290 Orgs []string
291 Owner string
292 Name string
293 Error string
294 }{s.baseFor(u), repo, s.adminOrgs(u), owner, name, errMsg})
295}
296
297func (s *Server) forkForm(w http.ResponseWriter, r *http.Request, u store.User) {
298 repo, ok := s.repoForUser(w, r, u, policy.CanRead)
299 if !ok {
300 return
301 }
302 s.renderFork(w, u, repo, u.Username, repo.Name, "")
303}
304
305// forkSubmit forks the repository to the owner the form picked and sends
306// them to it. The command decides everything that matters — read access,
307// the right to create under that owner, quota, name collisions — so a
308// refusal comes back as its own message on the form (#174).
309func (s *Server) forkSubmit(w http.ResponseWriter, r *http.Request, u store.User) {
310 repo, ok := s.repoForUser(w, r, u, policy.CanRead)
311 if !ok {
312 return
313 }
314 owner, name := r.FormValue("owner"), r.FormValue("name")
315 if owner == "" {
316 owner = u.Username
317 }
318 if name == "" {
319 name = repo.Name
320 }
321 var fork control.ForkOut
322 argv := []string{"repo", "fork", repo.Path(), "--owner", owner, "--name", name}
323 if msg, ok := s.runControlInto(u, argv, &fork); !ok {
324 s.renderFork(w, u, repo, owner, name, msg)
325 return
326 }
327 http.Redirect(w, r, "/"+fork.Path, http.StatusSeeOther)
328}
329
330// repoForUser is repoFor with a write/read permission requirement for a
331// logged-in user.
332func (s *Server) repoForUser(w http.ResponseWriter, r *http.Request, u store.User,
333 perm func(store.User, store.Repo, string) bool) (store.Repo, bool) {
334 repo, err := s.st.RepoByPath(r.PathValue("owner") + "/" + r.PathValue("repo"))
335 if err != nil {
336 http.NotFound(w, r)
337 return store.Repo{}, false
338 }
339 grant, err := s.st.AccessRole(repo.ID, u.ID)
340 if err != nil {
341 http.Error(w, "internal error", http.StatusInternalServerError)
342 return store.Repo{}, false
343 }
344 if !policy.CanRead(u, repo, grant) {
345 http.NotFound(w, r) // invisible: same as nonexistent
346 return store.Repo{}, false
347 }
348 if !perm(u, repo, grant) {
349 http.Error(w, "permission denied", http.StatusForbidden)
350 return store.Repo{}, false
351 }
352 return repo, true
353}
354
355// signupForm and signupSubmit front the SSH registration path for open
356// and invite instances: same store transactions, same rules, a pasted
357// public key instead of the connecting one.
358func (s *Server) signupForm(w http.ResponseWriter, r *http.Request) {
359 s.renderSignup(w, "", "")
360}
361
362func (s *Server) renderSignup(w http.ResponseWriter, errMsg, username string) {
363 s.render(w, "register.html", struct {
364 basePage
365 Host string
366 Mode string // open | invite
367 Error string
368 Username string
369 }{basePage{Site: s.siteName(), Host: s.cfg.SiteHost()}, s.cfg.SiteHost(), s.cfg.Registration.Mode, errMsg, username})
370}
371
372func (s *Server) signupSubmit(w http.ResponseWriter, r *http.Request) {
373 username := strings.TrimSpace(r.FormValue("username"))
374 keyText := strings.TrimSpace(r.FormValue("key"))
375 pub, _, _, _, err := gossh.ParseAuthorizedKey([]byte(keyText))
376 if err != nil {
377 s.renderSignup(w, "that does not parse as an SSH public key (expected e.g. \"ssh-ed25519 AAAA... comment\")", username)
378 return
379 }
380 msg, errMsg, code := control.RegisterAccount(s.cfg, s.st, pub, username,
381 strings.TrimSpace(r.FormValue("email")), strings.TrimSpace(r.FormValue("invite")))
382 if code != 0 {
383 s.renderSignup(w, errMsg, username)
384 return
385 }
386 s.render(w, "registered.html", struct {
387 basePage
388 Username string
389 Message string
390 Host string
391 }{basePage{Site: s.siteName(), Host: s.cfg.SiteHost()}, username, msg, s.cfg.SiteHost()})
392}
393
394// issueCreateForm renders the new-issue form, prefilled from the repo's
395// default issue template when one exists. A Preview submit comes back
396// here with the draft in the form, so the page returns with everything
397// still typed and the rendering above the textarea (#235).
398func (s *Server) issueCreateForm(w http.ResponseWriter, r *http.Request, u store.User) {
399 p, ok := s.repoFor(w, r, "")
400 if !ok {
401 return
402 }
403 p.Tab = "issues"
404 if wantsPreview(r) {
405 d := s.draftFor(r, p.Repo, "body", "body", bodyFormat(r))
406 s.render(w, "issuenew.html", struct {
407 repoPage
408 Body string
409 Format string
410 Title string
411 Labels string
412 Template string
413 Templates []control.IssueTemplate
414 Draft *draft
415 }{p, d.Body, d.Format, r.FormValue("title"), r.FormValue("labels"),
416 "", control.IssueTemplates(p.Dir, p.Repo.DefaultBranch), d})
417 return
418 }
419 templates := control.IssueTemplates(p.Dir, p.Repo.DefaultBranch)
420 body, tplName := "", ""
421 if want := r.URL.Query().Get("template"); want != "" {
422 for _, t := range templates {
423 if t.Name == want {
424 body, tplName = t.Body, t.Name
425 }
426 }
427 } else {
428 for _, t := range templates {
429 if t.Name == "issue-template.md" || body == "" {
430 body, tplName = t.Body, t.Name
431 }
432 if t.Name == "issue-template.md" {
433 break
434 }
435 }
436 }
437 format := r.URL.Query().Get("format")
438 if format != "org" {
439 format = "md"
440 }
441 s.render(w, "issuenew.html", struct {
442 repoPage
443 Body string
444 Format string
445 Title string
446 Labels string
447 Template string
448 Templates []control.IssueTemplate
449 Draft *draft
450 }{p, body, format, "", "", tplName, templates, nil})
451}
452
453// Issue and merge request writes run the command the CLI runs, so the
454// archived check, notifications, body format and the audit entry have one
455// implementation. Bodies travel on stdin, the way --file - does.
456
457func (s *Server) issueCreateSubmit(w http.ResponseWriter, r *http.Request, u store.User) {
458 repoPath := r.PathValue("owner") + "/" + r.PathValue("repo")
459 title := strings.TrimSpace(r.FormValue("title"))
460 format := bodyFormat(r)
461 if wantsPreview(r) {
462 s.issueCreateForm(w, r, u)
463 return
464 }
465 var created control.Created
466 argv := []string{"issue", "create", repoPath, "--title", title, "--format", format, "--file", "-"}
467 code, msg := s.dispatchIntoStdin(u, argv, r.FormValue("body"), &created)
468 if code != protocol.ExitOK {
469 http.Error(w, msg, statusForExit(code))
470 return
471 }
472 n := created.Number
473 // Labels need write access, matching the SSH rule; the command refuses
474 // otherwise and the issue stands without them.
475 if args := fieldArgs("--add", r.FormValue("labels")); len(args) > 0 {
476 s.runControl(u, append([]string{"issue", "label", repoPath, fmt.Sprint(n)}, args...))
477 }
478 http.Redirect(w, r, fmt.Sprintf("/%s/issues/%d", repoPath, n), http.StatusSeeOther)
479}
480
481// issueEditSubmit edits title/body (author or write) and, with write
482// access, replaces the label set.
483func (s *Server) issueEditSubmit(w http.ResponseWriter, r *http.Request, u store.User) {
484 repoPath := r.PathValue("owner") + "/" + r.PathValue("repo")
485 n := r.PathValue("n")
486 if wantsPreview(r) {
487 s.issuePage(w, r, "edit")
488 return
489 }
490 title := strings.TrimSpace(r.FormValue("title"))
491 code, msg := s.dispatchJSON(u, []string{"issue", "edit", repoPath, n, "--title", title, "--file", "-"}, r.FormValue("body"))
492 if code != protocol.ExitOK {
493 http.Error(w, msg, statusForExit(code))
494 return
495 }
496 var cur struct {
497 Labels []string `json:"labels"`
498 }
499 if _, ok := s.runControlInto(u, []string{"issue", "show", repoPath, n}, &cur); ok {
500 want := strings.Fields(r.FormValue("labels"))
501 var args []string
502 for _, l := range cur.Labels {
503 if !slices.Contains(want, l) {
504 args = append(args, "--remove", l)
505 }
506 }
507 for _, l := range want {
508 if !slices.Contains(cur.Labels, l) {
509 args = append(args, "--add", l)
510 }
511 }
512 if len(args) > 0 {
513 s.runControl(u, append([]string{"issue", "label", repoPath, n}, args...))
514 }
515 }
516 http.Redirect(w, r, fmt.Sprintf("/%s/issues/%s", repoPath, n), http.StatusSeeOther)
517}
518
519// mrEditSubmit edits an MR's title/body (author or write).
520func (s *Server) mrEditSubmit(w http.ResponseWriter, r *http.Request, u store.User) {
521 repoPath := r.PathValue("owner") + "/" + r.PathValue("repo")
522 n := r.PathValue("n")
523 if wantsPreview(r) {
524 s.mrPage(w, r, "edit")
525 return
526 }
527 title := strings.TrimSpace(r.FormValue("title"))
528 code, msg := s.dispatchJSON(u, []string{"mr", "edit", repoPath, n, "--title", title, "--file", "-"}, r.FormValue("body"))
529 if code != protocol.ExitOK {
530 http.Error(w, msg, statusForExit(code))
531 return
532 }
533 http.Redirect(w, r, fmt.Sprintf("/%s/mrs/%s", repoPath, n), http.StatusSeeOther)
534}
535
536func (s *Server) issueCommentSubmit(w http.ResponseWriter, r *http.Request, u store.User) {
537 if wantsPreview(r) {
538 s.issuePage(w, r, "comment")
539 return
540 }
541 s.commentSubmit(w, r, u, "issue", "issues")
542}
543
544func (s *Server) mrCommentSubmit(w http.ResponseWriter, r *http.Request, u store.User) {
545 if wantsPreview(r) {
546 s.mrPage(w, r, "comment")
547 return
548 }
549 s.commentSubmit(w, r, u, "mr", "mrs")
550}
551
552func (s *Server) commentSubmit(w http.ResponseWriter, r *http.Request, u store.User, noun, segment string) {
553 repoPath := r.PathValue("owner") + "/" + r.PathValue("repo")
554 n := r.PathValue("n")
555 code, msg := s.dispatchJSON(u, []string{noun, "comment", repoPath, n, "--file", "-"}, strings.TrimSpace(r.FormValue("body")))
556 if code != protocol.ExitOK {
557 http.Error(w, msg, statusForExit(code))
558 return
559 }
560 http.Redirect(w, r, fmt.Sprintf("/%s/%s/%s", repoPath, segment, n), http.StatusSeeOther)
561}
562
563type editPage struct {
564 basePage
565 Repo store.Repo
566 Ref string
567 Path string
568 Content string
569 Error string
570 Blocked string
571 // Creating marks a path the branch does not have yet.
572 Creating bool
573 // Markup is set for a path the forge renders, which is where a
574 // Preview button makes sense; Draft holds one when asked for (#235).
575 Markup bool
576 Draft *draft
577 Nav fileNav
578}
579
580func (s *Server) editForm(w http.ResponseWriter, r *http.Request, u store.User) {
581 repo, ok := s.repoForUser(w, r, u, policy.CanWrite)
582 if !ok {
583 return
584 }
585 ref := r.PathValue("ref")
586 filePath := strings.Trim(r.PathValue("path"), "/")
587
588 blocked := ""
589 switch {
590 case repo.Settings.RequireSignedCommits:
591 blocked = repo.Path() + " requires signed commits and the web editor cannot sign; edit locally and push a signed commit."
592 case repo.Settings.RequireMR && slices.Contains(repo.Settings.ProtectedBranches, ref):
593 blocked = "branch " + ref + " accepts changes through merge requests only; edit on another branch and open one."
594 }
595
596 dir := control.RepoDir(s.cfg.Server.Root, repo.OwnerName, repo.Name)
597 // A branch that does not exist has nothing to edit. A path that does
598 // not exist on a real branch is a new file: commit-file creates it.
599 if _, err := gitutil.ResolveRef(dir, "refs/heads/"+ref); err != nil {
600 s.notFound(w, r)
601 return
602 }
603 content, err := gitutil.ReadBlob(dir, "refs/heads/"+ref, filePath, maxRenderBytes)
604 creating := err != nil
605 if creating {
606 content = nil
607 }
608 if gitutil.IsBinary(content) {
609 http.Error(w, "binary files cannot be edited in the browser", http.StatusBadRequest)
610 return
611 }
612 navEntries, _ := gitutil.ListTree(dir, "refs/heads/"+ref, navDir(filePath))
613 nav := fileNavFor(repo.Path(), ref, filePath, navEntries)
614 s.render(w, "edit.html", editPage{
615 basePage: s.baseFor(u), Repo: repo,
616 Ref: ref, Path: filePath, Content: string(content), Blocked: blocked, Creating: creating,
617 Markup: markupFile(filePath),
618 Nav: nav,
619 })
620}
621
622func (s *Server) editSubmit(w http.ResponseWriter, r *http.Request, u store.User) {
623 repo, ok := s.repoForUser(w, r, u, policy.CanWrite)
624 if !ok {
625 return
626 }
627 ref := r.PathValue("ref")
628 filePath := strings.Trim(r.PathValue("path"), "/")
629
630 // Preview: the file as the blob page will render it, above the
631 // editor, with nothing committed. Only for paths the forge renders.
632 if wantsPreview(r) && markupFile(filePath) {
633 content := r.FormValue("content")
634 d := s.draftWith(r, "content", "", content, func(raw, _ string) template.HTML {
635 return renderReadme(path.Base(filePath), []byte(raw))
636 })
637 s.render(w, "edit.html", editPage{
638 basePage: s.baseFor(u), Repo: repo,
639 Ref: ref, Path: filePath, Content: content, Markup: true, Draft: d,
640 })
641 return
642 }
643
644 // Editing is a control command; the web supplies the form and lets
645 // the registry enforce the rules — signed-commit policy, verified
646 // identity, archived repositories — so every surface agrees on them.
647 argv := []string{"repo", "commit-file", repo.Path(), filePath, "--ref", ref, "--file", "-"}
648 if message := strings.TrimSpace(r.FormValue("message")); message != "" {
649 argv = append(argv, "--message", message)
650 }
651 if msg, ok := s.runControlStdin(u, argv, r.FormValue("content")); !ok {
652 s.render(w, "edit.html", editPage{
653 basePage: s.baseFor(u), Repo: repo,
654 Ref: ref, Path: filePath, Content: r.FormValue("content"), Error: msg,
655 Markup: markupFile(filePath),
656 })
657 return
658 }
659 http.Redirect(w, r, fmt.Sprintf("/%s/blob/%s/%s", repo.Path(), ref, filePath), http.StatusSeeOther)
660}