92 lines
2.5 KiB
Go
92 lines
2.5 KiB
Go
package middleware
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import (
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"context"
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"net/http"
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"strings"
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"mal/internal/database"
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"mal/internal/features/auth"
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)
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type contextKey string
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const (
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UserContextKey contextKey = "user"
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)
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func Auth(authService *auth.Service) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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cookie, err := r.Cookie("session_id")
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if err != nil {
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// No session cookie, user is unauthenticated. Proceed, but not logged in.
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next.ServeHTTP(w, r)
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return
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}
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user, err := authService.ValidateSession(r.Context(), cookie.Value)
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if err != nil {
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// Invalid session, proceed as unauthenticated
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// Might also want to clear the invalid cookie here
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auth.ClearSessionCookie(w)
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next.ServeHTTP(w, r)
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return
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}
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// Valid session, bind user to context
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ctx := context.WithValue(r.Context(), UserContextKey, user)
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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}
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// RequireAuth ensures that a valid user is in the context, otherwise unauthorized
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func RequireAuth(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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user, ok := r.Context().Value(UserContextKey).(*database.User)
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if !ok || user == nil {
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if strings.HasPrefix(r.URL.Path, "/api/") {
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w.Header().Set("HX-Redirect", "/login")
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http.Error(w, "Unauthorized", http.StatusUnauthorized)
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} else {
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http.Redirect(w, r, "/login", http.StatusFound)
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}
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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// RequireGlobalAuth ensures that a valid user is in the context for all routes except login and static
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func RequireGlobalAuth(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Allow unauthenticated access to login and static files
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if r.URL.Path == "/login" || strings.HasPrefix(r.URL.Path, "/static/") {
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next.ServeHTTP(w, r)
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return
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}
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user, ok := r.Context().Value(UserContextKey).(*database.User)
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if !ok || user == nil {
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if strings.HasPrefix(r.URL.Path, "/api/") || r.Header.Get("HX-Request") == "true" {
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w.Header().Set("HX-Redirect", "/login")
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http.Error(w, "Unauthorized", http.StatusUnauthorized)
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} else {
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http.Redirect(w, r, "/login", http.StatusFound)
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}
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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// GetUser returns the user from context, or nil if not logged in
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func GetUser(ctx context.Context) *database.User {
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user, ok := ctx.Value(UserContextKey).(*database.User)
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if !ok {
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return nil
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}
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return user
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}
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