http.go (view raw)
1package main
2
3import (
4 "bytes"
5 "database/sql"
6 "fmt"
7 gmi "git.sr.ht/~adnano/go-gemini"
8 "github.com/gorilla/handlers"
9 "github.com/gorilla/sessions"
10 _ "github.com/mattn/go-sqlite3"
11 "golang.org/x/crypto/bcrypt"
12 "html/template"
13 "io"
14 "io/ioutil"
15 "log"
16 "mime"
17 "net/http"
18 "os"
19 "path"
20 "path/filepath"
21 "strings"
22 "time"
23)
24
25var t *template.Template
26var DB *sql.DB
27var SessionStore *sessions.CookieStore
28
29func renderDefaultError(w http.ResponseWriter, statusCode int) {
30 errorMsg := http.StatusText(statusCode)
31 renderError(w, errorMsg, statusCode)
32}
33
34func renderError(w http.ResponseWriter, errorMsg string, statusCode int) {
35 data := struct {
36 PageTitle string
37 StatusCode int
38 ErrorMsg string
39 }{"Error!", statusCode, errorMsg}
40 err := t.ExecuteTemplate(w, "error.html", data)
41 if err != nil { // Shouldn't happen probably
42 http.Error(w, errorMsg, statusCode)
43 }
44}
45
46func rootHandler(w http.ResponseWriter, r *http.Request) {
47 // serve everything inside static directory
48 if r.URL.Path != "/" {
49 fileName := path.Join(c.TemplatesDirectory, "static", filepath.Clean(r.URL.Path))
50 _, err := os.Stat(fileName)
51 if err != nil {
52 renderDefaultError(w, http.StatusNotFound)
53 return
54 }
55 http.ServeFile(w, r, fileName) // TODO better error handling
56 return
57 }
58
59 user := newGetAuthUser(r)
60 indexFiles, err := getIndexFiles(user.IsAdmin)
61 if err != nil {
62 panic(err)
63 }
64 allUsers, err := getActiveUserNames()
65 if err != nil {
66 panic(err)
67 }
68 data := struct {
69 Host string
70 PageTitle string
71 Files []*File
72 Users []string
73 AuthUser AuthUser
74 }{c.Host, c.SiteTitle, indexFiles, allUsers, user}
75 err = t.ExecuteTemplate(w, "index.html", data)
76 if err != nil {
77 panic(err)
78 }
79}
80
81func feedHandler(w http.ResponseWriter, r *http.Request) {
82 user := newGetAuthUser(r)
83 feedEntries, feeds, err := getAllGemfeedEntries()
84 if err != nil {
85 panic(err)
86 }
87 data := struct {
88 Host string
89 PageTitle string
90 FeedEntries []*FeedEntry
91 Feeds []*Gemfeed
92 AuthUser AuthUser
93 }{c.Host, c.SiteTitle, feedEntries, feeds, user}
94 err = t.ExecuteTemplate(w, "feed.html", data)
95 if err != nil {
96 panic(err)
97 }
98}
99
100func editFileHandler(w http.ResponseWriter, r *http.Request) {
101 user := newGetAuthUser(r)
102 if !user.LoggedIn {
103 renderDefaultError(w, http.StatusForbidden)
104 return
105 }
106 fileName := filepath.Clean(r.URL.Path[len("/edit/"):])
107 isText := strings.HasPrefix(mime.TypeByExtension(path.Ext(fileName)), "text")
108 filePath := path.Join(c.FilesDirectory, user.Username, fileName)
109
110 if r.Method == "GET" {
111 err := checkIfValidFile(filePath, nil)
112 if err != nil {
113 log.Println(err)
114 renderError(w, err.Error(), http.StatusBadRequest)
115 return
116 }
117 // Create directories if dne
118 f, err := os.OpenFile(filePath, os.O_RDONLY, 0644)
119 var fileBytes []byte
120 if os.IsNotExist(err) || !isText {
121 fileBytes = []byte{}
122 err = nil
123 } else {
124 defer f.Close()
125 fileBytes, err = ioutil.ReadAll(f)
126 }
127 if err != nil {
128 panic(err)
129 }
130 data := struct {
131 FileName string
132 FileText string
133 PageTitle string
134 AuthUser AuthUser
135 Host string
136 IsText bool
137 }{fileName, string(fileBytes), c.SiteTitle, user, c.Host, isText}
138 err = t.ExecuteTemplate(w, "edit_file.html", data)
139 if err != nil {
140 panic(err)
141 }
142 } else if r.Method == "POST" {
143 // get post body
144 r.ParseForm()
145 fileText := r.Form.Get("file_text")
146 // Web form by default gives us CR LF newlines.
147 // Unix files use just LF
148 fileText = strings.ReplaceAll(fileText, "\r\n", "\n")
149 fileBytes := []byte(fileText)
150 err := checkIfValidFile(filePath, fileBytes)
151 if err != nil {
152 log.Println(err)
153 renderError(w, err.Error(), http.StatusBadRequest)
154 return
155 }
156 // create directories if dne
157 os.MkdirAll(path.Dir(filePath), os.ModePerm)
158 if userHasSpace(user.Username, len(fileBytes)) {
159 if isText { // Cant edit binary files here
160 err = ioutil.WriteFile(filePath, fileBytes, 0644)
161 }
162 } else {
163 renderError(w, fmt.Sprintf("Bad Request: Out of file space. Max space: %d.", c.MaxUserBytes), http.StatusBadRequest)
164 return
165 }
166 if err != nil {
167 panic(err)
168 }
169 newName := filepath.Clean(r.Form.Get("rename"))
170 err = checkIfValidFile(newName, fileBytes)
171 if err != nil {
172 log.Println(err)
173 renderError(w, err.Error(), http.StatusBadRequest)
174 return
175 }
176 if newName != fileName {
177 newPath := path.Join(c.FilesDirectory, user.Username, newName)
178 os.MkdirAll(path.Dir(newPath), os.ModePerm)
179 os.Rename(filePath, newPath)
180 fileName = newName
181 }
182 http.Redirect(w, r, path.Join("/edit", fileName), http.StatusSeeOther)
183 }
184}
185
186func uploadFilesHandler(w http.ResponseWriter, r *http.Request) {
187 if r.Method == "POST" {
188 user := newGetAuthUser(r)
189 if !user.LoggedIn {
190 renderDefaultError(w, http.StatusForbidden)
191 return
192 }
193 r.ParseMultipartForm(10 << 6) // why does this not work
194 file, fileHeader, err := r.FormFile("file")
195 fileName := filepath.Clean(fileHeader.Filename)
196 defer file.Close()
197 if err != nil {
198 log.Println(err)
199 renderError(w, err.Error(), http.StatusBadRequest)
200 return
201 }
202 dest, _ := ioutil.ReadAll(file)
203 err = checkIfValidFile(fileName, dest)
204 if err != nil {
205 log.Println(err)
206 renderError(w, err.Error(), http.StatusBadRequest)
207 return
208 }
209 destPath := path.Join(c.FilesDirectory, user.Username, fileName)
210
211 f, err := os.OpenFile(destPath, os.O_WRONLY|os.O_CREATE, 0644)
212 if err != nil {
213 panic(err)
214 }
215 defer f.Close()
216 if userHasSpace(user.Username, c.MaxFileBytes) { // Not quite right
217 io.Copy(f, bytes.NewReader(dest))
218 } else {
219 renderError(w, fmt.Sprintf("Bad Request: Out of file space. Max space: %d.", c.MaxUserBytes), http.StatusBadRequest)
220 return
221 }
222 }
223 http.Redirect(w, r, "/my_site", http.StatusSeeOther)
224}
225
226type AuthUser struct {
227 LoggedIn bool
228 Username string
229 IsAdmin bool
230 ImpersonatingUser string // used if impersonating
231}
232
233func newGetAuthUser(r *http.Request) AuthUser {
234 session, _ := SessionStore.Get(r, "cookie-session")
235 user, ok := session.Values["auth_user"].(string)
236 impers, _ := session.Values["impersonating_user"].(string)
237 isAdmin, _ := session.Values["admin"].(bool)
238 return AuthUser{
239 LoggedIn: ok,
240 Username: user,
241 IsAdmin: isAdmin,
242 ImpersonatingUser: impers,
243 }
244}
245
246func mySiteHandler(w http.ResponseWriter, r *http.Request) {
247 user := newGetAuthUser(r)
248 if !user.LoggedIn {
249 renderDefaultError(w, http.StatusForbidden)
250 return
251 }
252 // check auth
253 userFolder := getUserDirectory(user.Username)
254 files, _ := getMyFilesRecursive(userFolder, user.Username)
255 data := struct {
256 Host string
257 PageTitle string
258 Files []*File
259 AuthUser AuthUser
260 }{c.Host, c.SiteTitle, files, user}
261 _ = t.ExecuteTemplate(w, "my_site.html", data)
262}
263
264func myAccountHandler(w http.ResponseWriter, r *http.Request) {
265 user := newGetAuthUser(r)
266 authUser := user.Username
267 if !user.LoggedIn {
268 renderDefaultError(w, http.StatusForbidden)
269 return
270 }
271 me, _ := getUserByName(user.Username)
272 type pageData struct {
273 PageTitle string
274 AuthUser AuthUser
275 Email string
276 Errors []string
277 }
278 data := pageData{"My Account", user, me.Email, nil}
279
280 if r.Method == "GET" {
281 err := t.ExecuteTemplate(w, "me.html", data)
282 if err != nil {
283 panic(err)
284 }
285 } else if r.Method == "POST" {
286 r.ParseForm()
287 newUsername := r.Form.Get("username")
288 errors := []string{}
289 newEmail := r.Form.Get("email")
290 newUsername = strings.ToLower(newUsername)
291 var err error
292 if newEmail != me.Email {
293 _, err = DB.Exec("update user set email = ? where username = ?", newEmail, me.Email)
294 if err != nil {
295 // TODO better error not sql
296 errors = append(errors, err.Error())
297 } else {
298 log.Printf("Changed email for %s from %s to %s", authUser, me.Email, newEmail)
299 }
300 }
301 if newUsername != authUser {
302 // Rename User
303 err = renameUser(authUser, newUsername)
304 if err != nil {
305 log.Println(err)
306 errors = append(errors, "Could not rename user")
307 } else {
308 session, _ := SessionStore.Get(r, "cookie-session")
309 session.Values["auth_user"] = newUsername
310 session.Save(r, w)
311 }
312 }
313 // reset auth
314 user = newGetAuthUser(r)
315 data.Errors = errors
316 data.AuthUser = user
317 data.Email = newEmail
318 _ = t.ExecuteTemplate(w, "me.html", data)
319 }
320}
321
322func archiveHandler(w http.ResponseWriter, r *http.Request) {
323 authUser := newGetAuthUser(r)
324 if !authUser.LoggedIn {
325 renderDefaultError(w, http.StatusForbidden)
326 return
327 }
328 if r.Method == "GET" {
329 userFolder := getUserDirectory(authUser.Username)
330 err := zipit(userFolder, w)
331 if err != nil {
332 panic(err)
333 }
334
335 }
336}
337func loginHandler(w http.ResponseWriter, r *http.Request) {
338 if r.Method == "GET" {
339 // show page
340 data := struct {
341 Error string
342 PageTitle string
343 }{"", "Login"}
344 err := t.ExecuteTemplate(w, "login.html", data)
345 if err != nil {
346 panic(err)
347 }
348 } else if r.Method == "POST" {
349 r.ParseForm()
350 name := r.Form.Get("username")
351 password := r.Form.Get("password")
352 row := DB.QueryRow("SELECT username, password_hash, active, admin FROM user where username = $1 OR email = $1", name)
353 var db_password []byte
354 var username string
355 var active bool
356 var isAdmin bool
357 err := row.Scan(&username, &db_password, &active, &isAdmin)
358 if err != nil {
359 panic(err)
360 }
361 if db_password != nil && !active {
362 data := struct {
363 Error string
364 PageTitle string
365 }{"Your account is not active yet. Pending admin approval", c.SiteTitle}
366 t.ExecuteTemplate(w, "login.html", data)
367 return
368 }
369 if bcrypt.CompareHashAndPassword(db_password, []byte(password)) == nil {
370 log.Println("logged in")
371 session, _ := SessionStore.Get(r, "cookie-session")
372 session.Values["auth_user"] = username
373 session.Values["admin"] = isAdmin
374 session.Save(r, w)
375 http.Redirect(w, r, "/my_site", http.StatusSeeOther)
376 } else {
377 data := struct {
378 Error string
379 PageTitle string
380 }{"Invalid login or password", c.SiteTitle}
381 err := t.ExecuteTemplate(w, "login.html", data)
382 if err != nil {
383 panic(err)
384 }
385 }
386 }
387}
388
389func logoutHandler(w http.ResponseWriter, r *http.Request) {
390 session, _ := SessionStore.Get(r, "cookie-session")
391 impers, ok := session.Values["impersonating_user"].(string)
392 if ok {
393 session.Values["auth_user"] = impers
394 session.Values["impersonating_user"] = nil // TODO expire this automatically
395 // session.Values["admin"] = nil // TODO fix admin
396 } else {
397 session.Options.MaxAge = -1
398 }
399 session.Save(r, w)
400 http.Redirect(w, r, "/", http.StatusSeeOther)
401}
402
403const ok = "-0123456789abcdefghijklmnopqrstuvwxyz"
404
405func isOkUsername(s string) error {
406 if len(s) < 1 {
407 return fmt.Errorf("Username is too short")
408 }
409 if len(s) > 32 {
410 return fmt.Errorf("Username is too long. 32 char max.")
411 }
412 for _, char := range s {
413 if !strings.Contains(ok, strings.ToLower(string(char))) {
414 return fmt.Errorf("Username contains invalid characters. Valid characters include lowercase letters, numbers, and hyphens.")
415 }
416 }
417 return nil
418}
419func registerHandler(w http.ResponseWriter, r *http.Request) {
420 if r.Method == "GET" {
421 data := struct {
422 Host string
423 Errors []string
424 PageTitle string
425 }{c.Host, nil, "Register"}
426 err := t.ExecuteTemplate(w, "register.html", data)
427 if err != nil {
428 panic(err)
429 }
430 } else if r.Method == "POST" {
431 r.ParseForm()
432 email := r.Form.Get("email")
433 password := r.Form.Get("password")
434 errors := []string{}
435 if r.Form.Get("password") != r.Form.Get("password2") {
436 errors = append(errors, "Passwords don't match")
437 }
438 if len(password) < 6 {
439 errors = append(errors, "Password is too short")
440 }
441 username := strings.ToLower(r.Form.Get("username"))
442 err := isOkUsername(username)
443 if err != nil {
444 errors = append(errors, err.Error())
445 }
446 hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), 8) // TODO handle error
447 if err != nil {
448 panic(err)
449 }
450 reference := r.Form.Get("reference")
451 if len(errors) == 0 {
452 _, err = DB.Exec("insert into user (username, email, password_hash, reference) values ($1, $2, $3, $4)", username, email, string(hashedPassword), reference)
453 if err != nil {
454 errors = append(errors, "Username or email is already used")
455 }
456 }
457 if len(errors) > 0 {
458 data := struct {
459 Host string
460 Errors []string
461 PageTitle string
462 }{c.Host, errors, "Register"}
463 t.ExecuteTemplate(w, "register.html", data)
464 } else {
465 data := struct {
466 Host string
467 Message string
468 PageTitle string
469 }{c.Host, "Registration complete! The server admin will approve your request before you can log in.", "Registration Complete"}
470 t.ExecuteTemplate(w, "message.html", data)
471 }
472 }
473}
474
475func deleteFileHandler(w http.ResponseWriter, r *http.Request) {
476 user := newGetAuthUser(r)
477 if !user.LoggedIn {
478 renderDefaultError(w, http.StatusForbidden)
479 return
480 }
481 filePath := safeGetFilePath(user.Username, r.URL.Path[len("/delete/"):])
482 if r.Method == "POST" {
483 os.Remove(filePath) // TODO handle error
484 }
485 http.Redirect(w, r, "/my_site", http.StatusSeeOther)
486}
487
488func adminHandler(w http.ResponseWriter, r *http.Request) {
489 user := newGetAuthUser(r)
490 if !user.IsAdmin {
491 renderDefaultError(w, http.StatusForbidden)
492 return
493 }
494 allUsers, err := getUsers()
495 if err != nil {
496 log.Println(err)
497 renderDefaultError(w, http.StatusInternalServerError)
498 return
499 }
500 data := struct {
501 Users []User
502 AuthUser AuthUser
503 PageTitle string
504 Host string
505 }{allUsers, user, "Admin", c.Host}
506 err = t.ExecuteTemplate(w, "admin.html", data)
507 if err != nil {
508 panic(err)
509 }
510}
511
512func getFavicon(user string) string {
513 faviconPath := path.Join(c.FilesDirectory, filepath.Clean(user), "favicon.txt")
514 content, err := ioutil.ReadFile(faviconPath)
515 if err != nil {
516 return ""
517 }
518 strcontent := []rune(string(content))
519 if len(strcontent) > 0 {
520 return string(strcontent[0])
521 }
522 return ""
523}
524
525// Server a user's file
526func userFile(w http.ResponseWriter, r *http.Request) {
527 userName := filepath.Clean(strings.Split(r.Host, ".")[0]) // Clean probably unnecessary
528 p := filepath.Clean(r.URL.Path)
529 var isDir bool
530 fileName := path.Join(c.FilesDirectory, userName, p)
531 stat, err := os.Stat(fileName)
532 if stat != nil {
533 isDir = stat.IsDir()
534 }
535 if p == "/" || isDir {
536 fileName = path.Join(fileName, "index.gmi")
537 }
538
539 if strings.HasPrefix(p, "/.hidden") {
540 renderDefaultError(w, http.StatusForbidden)
541 return
542 }
543 if r.URL.Path == "/style.css" {
544 http.ServeFile(w, r, path.Join(c.TemplatesDirectory, "static/style.css"))
545 return
546 }
547
548 _, err = os.Stat(fileName)
549 if os.IsNotExist(err) {
550 renderDefaultError(w, http.StatusNotFound)
551 return
552 }
553
554 // Dumb content negotiation
555 _, raw := r.URL.Query()["raw"]
556 acceptsGemini := strings.Contains(r.Header.Get("Accept"), "text/gemini")
557 if !raw && !acceptsGemini && isGemini(fileName) {
558 file, _ := os.Open(fileName)
559 htmlString := textToHTML(gmi.ParseText(file))
560 favicon := getFavicon(userName)
561 hostname := strings.Split(r.Host, ":")[0]
562 URI := hostname + r.URL.String()
563 data := struct {
564 SiteBody template.HTML
565 Favicon string
566 PageTitle string
567 URI string
568 }{template.HTML(htmlString), favicon, userName + p, URI}
569 t.ExecuteTemplate(w, "user_page.html", data)
570 } else {
571 http.ServeFile(w, r, fileName)
572 }
573}
574
575func deleteAccountHandler(w http.ResponseWriter, r *http.Request) {
576 user := newGetAuthUser(r)
577 if r.Method == "POST" {
578 r.ParseForm()
579 validate := r.Form.Get("validate-delete")
580 if validate == user.Username {
581 err := deleteUser(user.Username)
582 if err != nil {
583 log.Println(err)
584 renderDefaultError(w, http.StatusInternalServerError)
585 return
586 }
587 logoutHandler(w, r)
588 } else {
589 http.Redirect(w, r, "/me", http.StatusSeeOther)
590 }
591 }
592}
593
594func resetPasswordHandler(w http.ResponseWriter, r *http.Request) {
595 user := newGetAuthUser(r)
596 data := struct {
597 PageTitle string
598 AuthUser AuthUser
599 Error string
600 }{"Reset Password", user, ""}
601 if r.Method == "GET" {
602 err := t.ExecuteTemplate(w, "reset_pass.html", data)
603 if err != nil {
604 panic(err)
605 }
606 } else if r.Method == "POST" {
607 r.ParseForm()
608 enteredCurrPass := r.Form.Get("password")
609 password1 := r.Form.Get("new_password1")
610 password2 := r.Form.Get("new_password2")
611 if password1 != password2 {
612 data.Error = "New passwords do not match"
613 } else if len(password1) < 6 {
614 data.Error = "Password is too short"
615 } else {
616 err := checkAuth(user.Username, enteredCurrPass)
617 if err == nil {
618 hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password1), 8)
619 if err != nil {
620 panic(err)
621 }
622 _, err = DB.Exec("update user set password_hash = ? where username = ?", hashedPassword, user.Username)
623 if err != nil {
624 panic(err)
625 }
626 log.Printf("User %s reset password", user.Username)
627 http.Redirect(w, r, "/me", http.StatusSeeOther)
628 return
629 } else {
630 data.Error = "That's not your current password"
631 }
632 }
633 err := t.ExecuteTemplate(w, "reset_pass.html", data)
634 if err != nil {
635 panic(err)
636 }
637 }
638}
639
640func adminUserHandler(w http.ResponseWriter, r *http.Request) {
641 user := newGetAuthUser(r)
642 if r.Method == "POST" {
643 if !user.IsAdmin {
644 renderDefaultError(w, http.StatusForbidden)
645 return
646 }
647 components := strings.Split(r.URL.Path, "/")
648 if len(components) < 5 {
649 renderError(w, "Invalid action", http.StatusBadRequest)
650 return
651 }
652 userName := components[3]
653 action := components[4]
654 var err error
655 if action == "activate" {
656 err = activateUser(userName)
657 } else if action == "impersonate" {
658 if user.ImpersonatingUser != "" {
659 // Don't allow nested impersonation
660 renderError(w, "Cannot nest impersonation, log out from impersonated user first.", 400)
661 return
662 }
663 session, _ := SessionStore.Get(r, "cookie-session")
664 session.Values["auth_user"] = userName
665 session.Values["impersonating_user"] = user.Username
666 session.Save(r, w)
667 log.Printf("User %s impersonated %s", user.Username, userName)
668 http.Redirect(w, r, "/", http.StatusSeeOther)
669 return
670 }
671 if err != nil {
672 log.Println(err)
673 renderDefaultError(w, http.StatusInternalServerError)
674 return
675 }
676 http.Redirect(w, r, "/admin", http.StatusSeeOther)
677 }
678}
679
680func runHTTPServer() {
681 log.Printf("Running http server with hostname %s on port %d. TLS enabled: %t", c.Host, c.HttpPort, c.HttpsEnabled)
682 var err error
683 t, err = template.ParseGlob(path.Join(c.TemplatesDirectory, "*.html"))
684 if err != nil {
685 log.Fatal(err)
686 }
687 serveMux := http.NewServeMux()
688
689 s := strings.SplitN(c.Host, ":", 2)
690 hostname := s[0]
691 port := c.HttpPort
692
693 serveMux.HandleFunc(hostname+"/", rootHandler)
694 serveMux.HandleFunc(hostname+"/feed", feedHandler)
695 serveMux.HandleFunc(hostname+"/my_site", mySiteHandler)
696 serveMux.HandleFunc(hostname+"/me", myAccountHandler)
697 serveMux.HandleFunc(hostname+"/my_site/flounder-archive.zip", archiveHandler)
698 serveMux.HandleFunc(hostname+"/admin", adminHandler)
699 serveMux.HandleFunc(hostname+"/edit/", editFileHandler)
700 serveMux.HandleFunc(hostname+"/upload", uploadFilesHandler)
701 serveMux.Handle(hostname+"/login", limit(http.HandlerFunc(loginHandler)))
702 serveMux.Handle(hostname+"/register", limit(http.HandlerFunc(registerHandler)))
703 serveMux.HandleFunc(hostname+"/logout", logoutHandler)
704 serveMux.HandleFunc(hostname+"/delete/", deleteFileHandler)
705 serveMux.HandleFunc(hostname+"/delete-account", deleteAccountHandler)
706 serveMux.HandleFunc(hostname+"/reset-password", resetPasswordHandler)
707
708 // admin commands
709 serveMux.HandleFunc(hostname+"/admin/user/", adminUserHandler)
710 // TODO authentication
711 serveMux.HandleFunc(hostname+"/webdav/", webdavHandler)
712
713 wrapped := (handlers.LoggingHandler(log.Writer(), handlers.RecoveryHandler()(serveMux)))
714
715 // handle user files based on subdomain
716 serveMux.HandleFunc("/", userFile)
717 // login+register functions
718 srv := &http.Server{
719 ReadTimeout: 5 * time.Second,
720 WriteTimeout: 10 * time.Second,
721 IdleTimeout: 120 * time.Second,
722 Addr: fmt.Sprintf(":%d", port),
723 // TLSConfig: tlsConfig,
724 Handler: wrapped,
725 }
726 if c.HttpsEnabled {
727 log.Fatal(srv.ListenAndServeTLS(c.TLSCertFile, c.TLSKeyFile))
728 } else {
729 log.Fatal(srv.ListenAndServe())
730 }
731}