all repos — flounder @ 94c1000834fa69f594135dc75f0b2bdeb8fb6821

A small site builder for the Gemini protocol

http.go (view raw)

  1package main
  2
  3import (
  4	"bytes"
  5	"fmt"
  6	gmi "git.sr.ht/~adnano/go-gemini"
  7	"github.com/gorilla/handlers"
  8	"github.com/gorilla/sessions"
  9	_ "github.com/mattn/go-sqlite3"
 10	"golang.org/x/crypto/bcrypt"
 11	"html/template"
 12	"io"
 13	"io/ioutil"
 14	"log"
 15	"net/http"
 16	"net/url"
 17	"os"
 18	"path"
 19	"path/filepath"
 20	"strings"
 21	"time"
 22)
 23
 24var t *template.Template
 25var SessionStore *sessions.CookieStore
 26
 27func renderDefaultError(w http.ResponseWriter, statusCode int) {
 28	errorMsg := http.StatusText(statusCode)
 29	renderError(w, errorMsg, statusCode)
 30}
 31
 32func serverError(w http.ResponseWriter, err error) {
 33	log.Print(err)
 34	renderDefaultError(w, 500)
 35}
 36
 37func renderError(w http.ResponseWriter, errorMsg string, statusCode int) {
 38	data := struct {
 39		StatusCode int
 40		ErrorMsg   string
 41		Config     Config
 42	}{statusCode, errorMsg, c}
 43	w.WriteHeader(statusCode)
 44	err := t.ExecuteTemplate(w, "error.html", data)
 45	if err != nil { // Shouldn't happen probably
 46		http.Error(w, errorMsg, statusCode)
 47	}
 48}
 49
 50func rootHandler(w http.ResponseWriter, r *http.Request) {
 51	// serve everything inside static directory
 52	if r.URL.Path != "/" {
 53		fileName := path.Join(c.TemplatesDirectory, "static", filepath.Clean(r.URL.Path))
 54		_, err := os.Stat(fileName)
 55		if err != nil {
 56			renderDefaultError(w, http.StatusNotFound)
 57			return
 58		}
 59		http.ServeFile(w, r, fileName) // TODO better error handling
 60		return
 61	}
 62
 63	user := getAuthUser(r)
 64	indexFiles, err := getIndexFiles(user.IsAdmin)
 65	if err != nil {
 66		serverError(w, err)
 67		return
 68	}
 69	allUsers, err := getActiveUserNames()
 70	if err != nil {
 71		serverError(w, err)
 72		return
 73	}
 74	data := struct {
 75		Config   Config
 76		AuthUser AuthUser
 77		Files    []*File
 78		Users    []string
 79	}{c, user, indexFiles, allUsers}
 80	err = t.ExecuteTemplate(w, "index.html", data)
 81	if err != nil {
 82		serverError(w, err)
 83		return
 84	}
 85}
 86
 87func editFileHandler(w http.ResponseWriter, r *http.Request) {
 88	user := getAuthUser(r)
 89	if !user.LoggedIn {
 90		renderDefaultError(w, http.StatusForbidden)
 91		return
 92	}
 93	fileName := filepath.Clean(r.URL.Path[len("/edit/"):])
 94	filePath := path.Join(c.FilesDirectory, user.Username, fileName)
 95	isText := isTextFile(filePath)
 96	alert := ""
 97	var warnings []string
 98	if r.Method == "POST" {
 99		// get post body
100		alert = "saved"
101		r.ParseForm()
102		fileText := r.Form.Get("file_text")
103		// Web form by default gives us CR LF newlines.
104		// Unix files use just LF
105		fileText = strings.ReplaceAll(fileText, "\r\n", "\n")
106		fileBytes := []byte(fileText)
107		err := checkIfValidFile(user.Username, filePath, fileBytes)
108		if err != nil {
109			log.Println(err)
110			renderError(w, err.Error(), http.StatusBadRequest)
111			return
112		}
113		sfl := getSchemedFlounderLinkLines(strings.NewReader(fileText))
114		if len(sfl) > 0 {
115			warnings = append(warnings, "Warning! Some of your links to pages use schemas. This means that they may break when viewed in Gemini or over HTTPS. Plase remove gemini: or https: from the start of these links:\n")
116			for _, l := range sfl {
117				warnings = append(warnings, l)
118			}
119		}
120		// create directories if dne
121		os.MkdirAll(path.Dir(filePath), os.ModePerm)
122		newName := filepath.Clean(r.Form.Get("rename"))
123		err = checkIfValidFile(user.Username, newName, fileBytes)
124		if err != nil {
125			log.Println(err)
126			renderError(w, err.Error(), http.StatusBadRequest)
127			return
128		}
129		if isText { // Cant edit binary files here
130			err = ioutil.WriteFile(filePath, fileBytes, 0644)
131			if err != nil {
132				log.Println(err)
133				renderError(w, err.Error(), http.StatusBadRequest)
134			}
135		}
136		if newName != fileName {
137			newPath := path.Join(c.FilesDirectory, user.Username, newName)
138			os.MkdirAll(path.Dir(newPath), os.ModePerm)
139			os.Rename(filePath, newPath)
140			fileName = newName
141			filePath = newPath
142			alert += " and renamed"
143		}
144	}
145
146	err := checkIfValidFile(user.Username, filePath, nil)
147	if err != nil {
148		log.Println(err)
149		renderError(w, err.Error(), http.StatusBadRequest)
150		return
151	}
152	// Create directories if dne
153	f, err := os.OpenFile(filePath, os.O_RDONLY, 0644)
154	var fileBytes []byte
155	if os.IsNotExist(err) || !isText {
156		fileBytes = []byte{}
157		err = nil
158	} else {
159		defer f.Close()
160		fileBytes, err = ioutil.ReadAll(f)
161	}
162	if err != nil {
163		serverError(w, err)
164		return
165	}
166	data := struct {
167		FileName string
168		FileText string
169		Config   Config
170		AuthUser AuthUser
171		Host     string
172		IsText   bool
173		IsGemini bool
174		IsGemlog bool
175		Alert    string
176		Warnings []string
177	}{fileName, string(fileBytes), c, user, c.Host, isText, isGemini(fileName), strings.HasPrefix(fileName, "gemlog"), alert, warnings}
178	err = t.ExecuteTemplate(w, "edit_file.html", data)
179	if err != nil {
180		serverError(w, err)
181		return
182	}
183}
184
185func uploadFilesHandler(w http.ResponseWriter, r *http.Request) {
186	if r.Method == "POST" {
187		user := getAuthUser(r)
188		if !user.LoggedIn {
189			renderDefaultError(w, http.StatusForbidden)
190			return
191		}
192		r.ParseMultipartForm(10 << 6) // why does this not work
193		file, fileHeader, err := r.FormFile("file")
194		if err != nil {
195			log.Println(err)
196			renderError(w, "No file selected. Please go back and select a file.", http.StatusBadRequest)
197			return
198		}
199		fileName := filepath.Clean(fileHeader.Filename)
200		defer file.Close()
201		dest, _ := ioutil.ReadAll(file)
202		err = checkIfValidFile(user.Username, fileName, dest)
203		if err != nil {
204			log.Println(err)
205			renderError(w, err.Error(), http.StatusBadRequest)
206			return
207		}
208		destPath := path.Join(c.FilesDirectory, user.Username, fileName)
209
210		f, err := os.OpenFile(destPath, os.O_WRONLY|os.O_CREATE, 0644)
211		if err != nil {
212			serverError(w, err)
213			return
214		}
215		defer f.Close()
216		io.Copy(f, bytes.NewReader(dest))
217	}
218	http.Redirect(w, r, "/my_site", http.StatusSeeOther)
219}
220
221type AuthUser struct {
222	LoggedIn          bool
223	Username          string
224	IsAdmin           bool
225	ImpersonatingUser string // used if impersonating
226}
227
228func getAuthUser(r *http.Request) AuthUser {
229	session, _ := SessionStore.Get(r, "cookie-session")
230	user, ok := session.Values["auth_user"].(string)
231	impers, _ := session.Values["impersonating_user"].(string)
232	isAdmin, _ := session.Values["admin"].(bool)
233	return AuthUser{
234		LoggedIn:          ok,
235		Username:          user,
236		IsAdmin:           isAdmin,
237		ImpersonatingUser: impers,
238	}
239}
240
241func mySiteHandler(w http.ResponseWriter, r *http.Request) {
242	user := getAuthUser(r)
243	if !user.LoggedIn {
244		renderDefaultError(w, http.StatusForbidden)
245		return
246	}
247	// check auth
248	userFolder := getUserDirectory(user.Username)
249	files, _ := getMyFilesRecursive(userFolder, user.Username)
250	currentDate := time.Now().Format("2006-01-02")
251	data := struct {
252		Config      Config
253		Files       []File
254		AuthUser    AuthUser
255		CurrentDate string
256	}{c, files, user, currentDate}
257	_ = t.ExecuteTemplate(w, "my_site.html", data)
258}
259
260func myAccountHandler(w http.ResponseWriter, r *http.Request) {
261	user := getAuthUser(r)
262	authUser := user.Username
263	if !user.LoggedIn {
264		renderDefaultError(w, http.StatusForbidden)
265		return
266	}
267	me, _ := getUserByName(user.Username)
268	type pageData struct {
269		Config   Config
270		AuthUser AuthUser
271		MyUser   *User
272		Errors   []string
273	}
274	data := pageData{c, user, me, nil}
275
276	if r.Method == "GET" {
277		err := t.ExecuteTemplate(w, "me.html", data)
278		if err != nil {
279			serverError(w, err)
280			return
281		}
282	} else if r.Method == "POST" {
283		r.ParseForm()
284		newUsername := r.Form.Get("username")
285		errors := []string{}
286		newEmail := r.Form.Get("email")
287		newDomain := r.Form.Get("domain")
288		newUsername = strings.ToLower(newUsername)
289		var err error
290		_, exists := domains[newDomain]
291		if newDomain != me.Domain && !exists {
292			_, err = DB.Exec("update user set domain = ? where username = ?", newDomain, me.Username) // TODO use transaction
293			if err != nil {
294				errors = append(errors, err.Error())
295			} else {
296				refreshDomainMap()
297				log.Printf("Changed domain for %s from %s to %s", authUser, me.Domain, newDomain)
298			}
299		}
300		if newEmail != me.Email {
301			_, err = DB.Exec("update user set email = ? where username = ?", newEmail, me.Username)
302			if err != nil {
303				// TODO better error not sql
304				errors = append(errors, err.Error())
305			} else {
306				log.Printf("Changed email for %s from %s to %s", authUser, me.Email, newEmail)
307			}
308		}
309		if newUsername != authUser {
310			// Rename User
311			err = renameUser(authUser, newUsername)
312			if err != nil {
313				log.Println(err)
314				errors = append(errors, "Could not rename user")
315			} else {
316				session, _ := SessionStore.Get(r, "cookie-session")
317				session.Values["auth_user"] = newUsername
318				session.Save(r, w)
319			}
320		}
321		// reset auth
322		user = getAuthUser(r)
323		data.Errors = errors
324		data.AuthUser = user
325		data.MyUser.Email = newEmail
326		data.MyUser.Domain = newDomain
327		_ = t.ExecuteTemplate(w, "me.html", data)
328	}
329}
330
331func archiveHandler(w http.ResponseWriter, r *http.Request) {
332	authUser := getAuthUser(r)
333	if !authUser.LoggedIn {
334		renderDefaultError(w, http.StatusForbidden)
335		return
336	}
337	if r.Method == "GET" {
338		userFolder := getUserDirectory(authUser.Username)
339		err := zipit(userFolder, w)
340		if err != nil {
341			serverError(w, err)
342			return
343		}
344
345	}
346}
347func loginHandler(w http.ResponseWriter, r *http.Request) {
348	if r.Method == "GET" {
349		// show page
350		data := struct {
351			Error  string
352			Config Config
353		}{"", c}
354		err := t.ExecuteTemplate(w, "login.html", data)
355		if err != nil {
356			serverError(w, err)
357			return
358		}
359	} else if r.Method == "POST" {
360		r.ParseForm()
361		name := strings.ToLower(r.Form.Get("username"))
362		password := r.Form.Get("password")
363		row := DB.QueryRow("SELECT username, password_hash, active, admin FROM user where username = $1 OR email = $1", name)
364		var db_password []byte
365		var username string
366		var active bool
367		var isAdmin bool
368		err := row.Scan(&username, &db_password, &active, &isAdmin)
369		if err != nil {
370			if strings.Contains(err.Error(), "no rows") {
371				data := struct {
372					Error  string
373					Config Config
374				}{"Username or email '" + name + "' does not exist", c}
375				w.WriteHeader(401)
376				t.ExecuteTemplate(w, "login.html", data)
377				return
378			} else {
379				serverError(w, err)
380				return
381			}
382		}
383		if db_password != nil && !active {
384			data := struct {
385				Error  string
386				Config Config
387			}{"Your account is not active yet. Pending admin approval", c}
388			w.WriteHeader(401)
389			t.ExecuteTemplate(w, "login.html", data)
390			return
391		}
392		if bcrypt.CompareHashAndPassword(db_password, []byte(password)) == nil {
393			log.Println("logged in")
394			session, _ := SessionStore.Get(r, "cookie-session")
395			session.Values["auth_user"] = username
396			session.Values["admin"] = isAdmin
397			session.Save(r, w)
398			http.Redirect(w, r, "/my_site", http.StatusSeeOther)
399		} else {
400			data := struct {
401				Error  string
402				Config Config
403			}{"Invalid login or password", c}
404			w.WriteHeader(401)
405			err := t.ExecuteTemplate(w, "login.html", data)
406			if err != nil {
407				serverError(w, err)
408				return
409			}
410		}
411	}
412}
413
414func logoutHandler(w http.ResponseWriter, r *http.Request) {
415	session, _ := SessionStore.Get(r, "cookie-session")
416	impers, ok := session.Values["impersonating_user"].(string)
417	if ok {
418		session.Values["auth_user"] = impers
419		session.Values["impersonating_user"] = nil // TODO expire this automatically
420		// session.Values["admin"] = nil // TODO fix admin
421	} else {
422		session.Options.MaxAge = -1
423	}
424	session.Save(r, w)
425	http.Redirect(w, r, "/", http.StatusSeeOther)
426}
427
428const ok = "-0123456789abcdefghijklmnopqrstuvwxyz"
429
430var bannedUsernames = []string{"www", "proxy", "grafana"}
431
432func registerHandler(w http.ResponseWriter, r *http.Request) {
433	if r.Method == "GET" {
434		data := struct {
435			Errors []string
436			Config Config
437		}{nil, c}
438		err := t.ExecuteTemplate(w, "register.html", data)
439		if err != nil {
440			serverError(w, err)
441			return
442		}
443	} else if r.Method == "POST" {
444		r.ParseForm()
445		email := strings.ToLower(r.Form.Get("email"))
446		password := r.Form.Get("password")
447		errors := []string{}
448		if r.Form.Get("password") != r.Form.Get("password2") {
449			errors = append(errors, "Passwords don't match")
450		}
451		if len(password) < 6 {
452			errors = append(errors, "Password is too short")
453		}
454		username := strings.ToLower(r.Form.Get("username"))
455		err := isOkUsername(username)
456		if err != nil {
457			errors = append(errors, err.Error())
458		}
459		_, err = os.Stat(getUserDirectory(username))
460		if !os.IsNotExist(err) {
461			// Don't allow user to create account if folder dne
462			errors = append(errors, "Invalid username")
463		}
464		hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), 8) // TODO handle error
465		if err != nil {
466			serverError(w, err)
467			return
468		}
469		reference := r.Form.Get("reference")
470		if len(errors) == 0 {
471			_, err = DB.Exec("insert into user (username, email, password_hash, reference) values ($1, $2, $3, $4)", username, email, string(hashedPassword), reference)
472			if err != nil {
473				errors = append(errors, "Username or email is already used")
474			}
475		}
476		if len(errors) > 0 {
477			data := struct {
478				Config Config
479				Errors []string
480			}{c, errors}
481			w.WriteHeader(400)
482			t.ExecuteTemplate(w, "register.html", data)
483		} else {
484			data := struct {
485				Config  Config
486				Message string
487				Title   string
488			}{c, "Registration complete! The server admin will approve your request before you can log in.", "Registration Complete"}
489			t.ExecuteTemplate(w, "message.html", data)
490		}
491	}
492}
493
494func deleteFileHandler(w http.ResponseWriter, r *http.Request) {
495	user := getAuthUser(r)
496	if !user.LoggedIn {
497		renderDefaultError(w, http.StatusForbidden)
498		return
499	}
500	filePath := safeGetFilePath(user.Username, r.URL.Path[len("/delete/"):])
501	if r.Method == "POST" {
502		os.Remove(filePath) // TODO handle error
503	}
504	http.Redirect(w, r, "/my_site", http.StatusSeeOther)
505}
506
507func adminHandler(w http.ResponseWriter, r *http.Request) {
508	user := getAuthUser(r)
509	if !user.IsAdmin {
510		renderDefaultError(w, http.StatusForbidden)
511		return
512	}
513	allUsers, err := getUsers()
514	if err != nil {
515		log.Println(err)
516		renderDefaultError(w, http.StatusInternalServerError)
517		return
518	}
519	data := struct {
520		Users    []User
521		AuthUser AuthUser
522		Config   Config
523	}{allUsers, user, c}
524	err = t.ExecuteTemplate(w, "admin.html", data)
525	if err != nil {
526		serverError(w, err)
527		return
528	}
529}
530
531// Server a user's file
532// TODO replace with gemini proxy
533// Here be dragons
534func userFile(w http.ResponseWriter, r *http.Request) {
535	var userName string
536	custom := domains[r.Host]
537	if custom != "" {
538		userName = custom
539	} else {
540		userName = filepath.Clean(strings.Split(r.Host, ".")[0]) // Clean probably unnecessary
541	}
542	p := filepath.Clean(r.URL.Path)
543	var isDir bool
544	fullPath := path.Join(c.FilesDirectory, userName, p) // TODO rename filepath
545	stat, err := os.Stat(fullPath)
546	if stat != nil {
547		isDir = stat.IsDir()
548	}
549	if strings.HasSuffix(p, "index.gmi") {
550		http.Redirect(w, r, path.Dir(p), http.StatusMovedPermanently)
551		return
552	}
553
554	if strings.HasPrefix(p, "/"+HiddenFolder) {
555		renderDefaultError(w, http.StatusForbidden)
556		return
557	}
558	if r.URL.Path == "/gemlog/atom.xml" && os.IsNotExist(err) {
559		w.Header().Set("Content-Type", "application/atom+xml")
560		// TODO set always somehow
561		feed := generateFeedFromUser(userName)
562		atomString := feed.toAtomFeed()
563		io.Copy(w, strings.NewReader(atomString))
564		return
565	}
566
567	var geminiContent string
568	_, err = os.Stat(path.Join(fullPath, "index.gmi"))
569	if isDir {
570		// redirect slash
571		if !strings.HasSuffix(r.URL.Path, "/") {
572			http.Redirect(w, r, p+"/", http.StatusSeeOther)
573		}
574		if os.IsNotExist(err) {
575			if p == "/gemlog" {
576				geminiContent = generateGemfeedPage(userName)
577			} else {
578				geminiContent = generateFolderPage(fullPath)
579			}
580		} else {
581			fullPath = path.Join(fullPath, "index.gmi")
582		}
583	}
584	if geminiContent == "" && os.IsNotExist(err) {
585		renderDefaultError(w, http.StatusNotFound)
586		return
587	}
588	// Dumb content negotiation
589	_, raw := r.URL.Query()["raw"]
590	acceptsGemini := strings.Contains(r.Header.Get("Accept"), "text/gemini")
591	if !raw && !acceptsGemini && (isGemini(fullPath) || geminiContent != "") {
592		var htmlDoc ConvertedGmiDoc
593		if geminiContent == "" {
594			file, _ := os.Open(fullPath)
595			parse, _ := gmi.ParseText(file)
596			htmlDoc = textToHTML(nil, parse)
597			defer file.Close()
598		} else {
599			parse, _ := gmi.ParseText(strings.NewReader(geminiContent))
600			htmlDoc = textToHTML(nil, parse)
601		}
602		hostname := strings.Split(r.Host, ":")[0]
603		uri := url.URL{
604			Scheme: "gemini",
605			Host:   hostname,
606			Path:   p,
607		}
608		if htmlDoc.Title == "" {
609			htmlDoc.Title = userName + p
610		}
611		data := struct {
612			SiteBody  template.HTML
613			PageTitle string
614			URI       *url.URL
615			GeminiURI *url.URL
616			Config    Config
617		}{template.HTML(htmlDoc.Content), htmlDoc.Title, &uri, &uri, c}
618		buff := bytes.NewBuffer([]byte{})
619		err = t.ExecuteTemplate(buff, "user_page.html", data)
620		if err != nil {
621			serverError(w, err)
622			return
623		}
624		breader := bytes.NewReader(buff.Bytes())
625		http.ServeContent(w, r, "", stat.ModTime(), breader)
626	} else {
627		http.ServeFile(w, r, fullPath)
628	}
629}
630
631func deleteAccountHandler(w http.ResponseWriter, r *http.Request) {
632	user := getAuthUser(r)
633	if r.Method == "POST" {
634		r.ParseForm()
635		validate := r.Form.Get("validate-delete")
636		if validate == user.Username {
637			err := deleteUser(user.Username)
638			if err != nil {
639				log.Println(err)
640				renderDefaultError(w, http.StatusInternalServerError)
641				return
642			}
643			logoutHandler(w, r)
644		} else {
645			http.Redirect(w, r, "/me", http.StatusSeeOther)
646		}
647	}
648}
649
650func resetPasswordHandler(w http.ResponseWriter, r *http.Request) {
651	user := getAuthUser(r)
652	data := struct {
653		Config   Config
654		AuthUser AuthUser
655		Error    string
656	}{c, user, ""}
657	if r.Method == "GET" {
658		err := t.ExecuteTemplate(w, "reset_pass.html", data)
659		if err != nil {
660			serverError(w, err)
661			return
662		}
663	} else if r.Method == "POST" {
664		r.ParseForm()
665		enteredCurrPass := r.Form.Get("password")
666		password1 := r.Form.Get("new_password1")
667		password2 := r.Form.Get("new_password2")
668		if password1 != password2 {
669			data.Error = "New passwords do not match"
670		} else if len(password1) < 6 {
671			data.Error = "Password is too short"
672		} else {
673			err := checkAuth(user.Username, enteredCurrPass)
674			if err == nil {
675				hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password1), 8)
676				if err != nil {
677					serverError(w, err)
678					return
679				}
680				_, err = DB.Exec("update user set password_hash = ? where username = ?", hashedPassword, user.Username)
681				if err != nil {
682					serverError(w, err)
683					return
684				}
685				log.Printf("User %s reset password", user.Username)
686				http.Redirect(w, r, "/me", http.StatusSeeOther)
687				return
688			} else {
689				data.Error = "That's not your current password"
690			}
691		}
692		err := t.ExecuteTemplate(w, "reset_pass.html", data)
693		if err != nil {
694			serverError(w, err)
695			return
696		}
697	}
698}
699
700func adminUserHandler(w http.ResponseWriter, r *http.Request) {
701	user := getAuthUser(r)
702	if r.Method == "POST" {
703		if !user.IsAdmin {
704			renderDefaultError(w, http.StatusForbidden)
705			return
706		}
707		components := strings.Split(r.URL.Path, "/")
708		if len(components) < 5 {
709			renderError(w, "Invalid action", http.StatusBadRequest)
710			return
711		}
712		userName := components[3]
713		action := components[4]
714		var err error
715		if action == "activate" {
716			err = activateUser(userName)
717		} else if action == "impersonate" {
718			if user.ImpersonatingUser != "" {
719				// Don't allow nested impersonation
720				renderError(w, "Cannot nest impersonation, log out from impersonated user first.", 400)
721				return
722			}
723			session, _ := SessionStore.Get(r, "cookie-session")
724			session.Values["auth_user"] = userName
725			session.Values["impersonating_user"] = user.Username
726			session.Save(r, w)
727			log.Printf("User %s impersonated %s", user.Username, userName)
728			http.Redirect(w, r, "/", http.StatusSeeOther)
729			return
730		}
731		if err != nil {
732			log.Println(err)
733			renderDefaultError(w, http.StatusInternalServerError)
734			return
735		}
736		http.Redirect(w, r, "/admin", http.StatusSeeOther)
737	}
738}
739
740func checkDomainHandler(w http.ResponseWriter, r *http.Request) {
741	domain := r.URL.Query().Get("domain")
742	if domain != "" && domains[domain] != "" {
743		w.Write([]byte(domain))
744		return
745	}
746	if domain == c.Host || strings.HasSuffix(domain, "."+c.Host) {
747		w.Write([]byte(domain))
748	}
749	http.Error(w, "Not Found", 404)
750}
751
752func runHTTPServer() {
753	log.Printf("Running http server with hostname %s on port %d.", c.Host, c.HttpPort)
754	var err error
755	t = template.New("main").Funcs(template.FuncMap{
756		"unixTime": time.Unix,
757		"parent":   path.Dir, "hasSuffix": strings.HasSuffix,
758		"safeGeminiURL": func(u string) template.URL {
759			if strings.HasPrefix(u, "gemini://") {
760				return template.URL(u)
761			}
762			return ""
763		}})
764	t, err = t.ParseGlob(path.Join(c.TemplatesDirectory, "*.html"))
765	if err != nil {
766		log.Fatal(err)
767	}
768	serveMux := http.NewServeMux()
769
770	s := strings.SplitN(c.Host, ":", 2)
771	hostname := s[0]
772
773	serveMux.HandleFunc(hostname+"/", rootHandler)
774	serveMux.HandleFunc(hostname+"/my_site", mySiteHandler)
775	serveMux.HandleFunc(hostname+"/me", myAccountHandler)
776	serveMux.HandleFunc(hostname+"/my_site/flounder-archive.zip", archiveHandler)
777	serveMux.HandleFunc(hostname+"/admin", adminHandler)
778	serveMux.HandleFunc(hostname+"/edit/", editFileHandler)
779	serveMux.HandleFunc(hostname+"/upload", uploadFilesHandler)
780	serveMux.Handle(hostname+"/login", limit(http.HandlerFunc(loginHandler)))
781	serveMux.Handle(hostname+"/register", limit(http.HandlerFunc(registerHandler)))
782	serveMux.HandleFunc(hostname+"/logout", logoutHandler)
783	serveMux.HandleFunc(hostname+"/delete/", deleteFileHandler)
784	serveMux.HandleFunc(hostname+"/delete-account", deleteAccountHandler)
785	serveMux.HandleFunc(hostname+"/reset-password", resetPasswordHandler)
786
787	// Used by Caddy
788	serveMux.HandleFunc(hostname+"/check-domain", checkDomainHandler)
789
790	// admin commands
791	serveMux.HandleFunc(hostname+"/admin/user/", adminUserHandler)
792
793	wrapped := handlers.CustomLoggingHandler(log.Writer(), serveMux, logFormatter)
794
795	// handle user files based on subdomain or custom domains
796	// also routes to proxy
797	serveMux.HandleFunc("proxy."+hostname+"/", proxyGemini)
798	serveMux.HandleFunc("/", userFile)
799	srv := &http.Server{
800		ReadTimeout:  5 * time.Second,
801		WriteTimeout: 10 * time.Second,
802		IdleTimeout:  120 * time.Second,
803		Addr:         fmt.Sprintf(":%d", c.HttpPort),
804		Handler:      wrapped,
805	}
806	log.Fatal(srv.ListenAndServe())
807}