2024-04-16 21:58:39 +00:00
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package admin
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import (
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2024-07-31 03:09:22 +00:00
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"context"
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"fmt"
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"html/template"
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"net/http"
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"os"
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"path/filepath"
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"strings"
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"time"
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"arimelody.me/arimelody.me/discord"
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"arimelody.me/arimelody.me/global"
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)
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func Handler() http.Handler {
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mux := http.NewServeMux()
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mux.Handle("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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w.Write([]byte("hello /admin!"))
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}))
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mux.Handle("/callback", global.HTTPLog(OAuthCallbackHandler()))
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mux.Handle("/login", global.HTTPLog(LoginHandler()))
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mux.Handle("/verify", global.HTTPLog(MustAuthorise(VerifyHandler())))
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mux.Handle("/logout", global.HTTPLog(MustAuthorise(LogoutHandler())))
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mux.Handle("/static", global.HTTPLog(MustAuthorise(staticHandler())))
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return mux
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}
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func MustAuthorise(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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auth := r.Header.Get("Authorization")
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if strings.HasPrefix(auth, "Bearer ") {
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auth = auth[7:]
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} else {
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cookie, err := r.Cookie("token")
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if err != nil {
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http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
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return
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}
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auth = cookie.Value
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}
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var session *Session
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for _, s := range sessions {
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if s.Expires < time.Now().Unix() {
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// expired session. remove it from the list!
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new_sessions := []*Session{}
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for _, ns := range sessions {
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if ns.Token == s.Token {
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continue
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}
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new_sessions = append(new_sessions, ns)
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}
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continue
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}
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if s.Token == auth {
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session = s
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break
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}
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}
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if session == nil {
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http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
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return
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}
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2024-08-01 02:54:15 +00:00
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ctx := context.WithValue(r.Context(), "role", "admin")
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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func LoginHandler() http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if ADMIN_ID_DISCORD == "" {
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http.Error(w, http.StatusText(http.StatusServiceUnavailable), http.StatusServiceUnavailable)
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return
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}
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2024-07-31 03:09:22 +00:00
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code := r.URL.Query().Get("code")
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if code == "" {
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http.Redirect(w, r, discord.REDIRECT_URI, http.StatusTemporaryRedirect)
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return
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}
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2024-07-31 03:21:52 +00:00
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auth_token, err := discord.GetOAuthTokenFromCode(code)
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if err != nil {
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fmt.Printf("Failed to retrieve discord access token: %s\n", err)
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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return
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}
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discord_user, err := discord.GetDiscordUserFromAuth(auth_token)
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if err != nil {
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fmt.Printf("Failed to retrieve discord user information: %s\n", err)
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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return
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}
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2024-07-31 03:21:52 +00:00
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if discord_user.Id != ADMIN_ID_DISCORD {
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// TODO: unauthorized user; revoke the token
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http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
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return
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}
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// login success!
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session := createSession(discord_user.Username)
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sessions = append(sessions, &session)
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cookie := http.Cookie{}
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cookie.Name = "token"
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cookie.Value = session.Token
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cookie.Expires = time.Now().Add(24 * time.Hour)
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// cookie.Secure = true
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cookie.HttpOnly = true
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cookie.Path = "/"
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http.SetCookie(w, &cookie)
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w.WriteHeader(http.StatusOK)
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w.Write([]byte(session.Token))
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})
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}
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func LogoutHandler() http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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token := r.Context().Value("token").(string)
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if token == "" {
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http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
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return
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}
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2024-07-31 03:09:22 +00:00
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// remove this session from the list
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sessions = func (token string) []*Session {
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new_sessions := []*Session{}
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for _, session := range sessions {
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new_sessions = append(new_sessions, session)
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}
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return new_sessions
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}(token)
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w.WriteHeader(http.StatusOK)
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w.Write([]byte("OK"))
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})
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}
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func OAuthCallbackHandler() http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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})
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}
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func VerifyHandler() http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// this is an authorised endpoint, so you *must* supply a valid token
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// before accessing this route.
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w.WriteHeader(http.StatusOK)
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w.Write([]byte("OK"))
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})
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}
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2024-08-01 23:53:19 +00:00
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func ServeTemplate(page string, data any) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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lp_layout := filepath.Join("views", "layout.html")
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lp_header := filepath.Join("views", "header.html")
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lp_footer := filepath.Join("views", "footer.html")
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lp_prideflag := filepath.Join("views", "prideflag.html")
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fp := filepath.Join("views", filepath.Clean(page))
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info, err := os.Stat(fp)
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if err != nil {
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if os.IsNotExist(err) {
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http.NotFound(w, r)
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return
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}
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}
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if info.IsDir() {
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http.NotFound(w, r)
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return
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}
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template, err := template.ParseFiles(lp_layout, lp_header, lp_footer, lp_prideflag, fp)
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if err != nil {
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fmt.Printf("Error parsing template files: %s\n", err)
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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return
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}
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err = template.ExecuteTemplate(w, "layout.html", data)
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if err != nil {
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fmt.Printf("Error executing template: %s\n", err)
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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return
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}
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})
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}
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2024-08-01 23:53:19 +00:00
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func staticHandler() http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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info, err := os.Stat(filepath.Join("admin", "static", filepath.Clean(r.URL.Path)))
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// does the file exist?
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if err != nil {
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if os.IsNotExist(err) {
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http.NotFound(w, r)
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return
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}
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}
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2024-08-01 23:53:19 +00:00
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// is thjs a directory? (forbidden)
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if info.IsDir() {
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http.NotFound(w, r)
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return
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}
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http.FileServer(http.Dir(filepath.Join("admin", "static"))).ServeHTTP(w, r)
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})
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2024-04-16 21:58:39 +00:00
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}
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