- Introduce configurable OAuth2 configuration cache time via UI and backend

- Refactor OAuth2Router to use `OAuth2ConfigurationCacheTime` with a default of 60s

src/def.go

@@ -93,7 +93,6 @@ var (
 	enableHighSpeedGeoIPLookup = flag.Bool("fastgeoip", false, "Enable high speed geoip lookup, require 1GB extra memory (Not recommend for low end devices)")
 	allowWebFileManager        = flag.Bool("webfm", true, "Enable web file manager for static web server root folder")
 	enableAutoUpdate           = flag.Bool("cfgupgrade", true, "Enable auto config upgrade if breaking change is detected")
-	oauth2ConfigurationCache   = flag.Duration("oauth2cc", 60*time.Second, "Time in seconds to cache OAuth2 configuration, set to 0 to disable cache. Default: 60 seconds")
 
 	/* Logging Configuration Flags */
 	enableLog            = flag.Bool("enablelog", true, "Enable system wide logging, set to false for writing log to STDOUT only")

src/mod/auth/sso/oauth2/oauth2.go

@@ -16,6 +16,11 @@ import (
 	"imuslab.com/zoraxy/mod/utils"
 )
 
+const (
+	// DefaultOAuth2ConfigCacheTime defines the default cache duration for OAuth2 configuration
+	DefaultOAuth2ConfigCacheTime = 60 * time.Second
+)
+
 type OAuth2RouterOptions struct {
 	OAuth2ServerURL              string //The URL of the OAuth 2.0 server server
 	OAuth2TokenURL               string //The URL of the OAuth 2.0 token server
@@ -25,9 +30,9 @@ type OAuth2RouterOptions struct {
 	OAuth2UserInfoUrl            string //The URL of the OAuth 2.0 user info endpoint
 	OAuth2Scopes                 string //The scopes for OAuth 2.0 Application
 	OAuth2CodeChallengeMethod    string //The authorization code challenge method
+	OAuth2ConfigurationCacheTime *time.Duration
 	Logger                       *logger.Logger
 	Database                     *database.Database
-	OAuth2ConfigCacheTTL      *time.Duration
 	OAuth2ConfigCache            *ttlcache.Cache[string, *oauth2.Config]
 }
 
@@ -64,13 +69,20 @@ func NewOAuth2Router(options *OAuth2RouterOptions) *OAuth2Router {
 	options.Database.Read("oauth2", "oauth2UserInfoUrl", &options.OAuth2UserInfoUrl)
 	options.Database.Read("oauth2", "oauth2CodeChallengeMethod", &options.OAuth2CodeChallengeMethod)
 	options.Database.Read("oauth2", "oauth2Scopes", &options.OAuth2Scopes)
+	options.Database.Read("oauth2", "oauth2ConfigurationCacheTime", &options.OAuth2ConfigurationCacheTime)
 
 	ar := &OAuth2Router{
 		options: options,
 	}
 
+	if options.OAuth2ConfigurationCacheTime == nil ||
+		options.OAuth2ConfigurationCacheTime.Seconds() == 0 {
+		cacheTime := DefaultOAuth2ConfigCacheTime
+		options.OAuth2ConfigurationCacheTime = &cacheTime
+	}
+
 	options.OAuth2ConfigCache = ttlcache.New[string, *oauth2.Config](
-		ttlcache.WithTTL[string, *oauth2.Config](*options.OAuth2ConfigCacheTTL),
+		ttlcache.WithTTL[string, *oauth2.Config](*options.OAuth2ConfigurationCacheTime),
 	)
 	go options.OAuth2ConfigCache.Start()
 
@@ -102,6 +114,7 @@ func (ar *OAuth2Router) handleSetOAuthSettingsGET(w http.ResponseWriter, r *http
 		"oauth2ClientSecret":           ar.options.OAuth2ClientSecret,
 		"oauth2ClientId":               ar.options.OAuth2ClientId,
 		"oauth2CodeChallengeMethod":    ar.options.OAuth2CodeChallengeMethod,
+		"oauth2ConfigurationCacheTime": ar.options.OAuth2ConfigurationCacheTime.String(),
 	})
 
 	utils.SendJSONResponse(w, string(js))
@@ -110,6 +123,7 @@ func (ar *OAuth2Router) handleSetOAuthSettingsGET(w http.ResponseWriter, r *http
 func (ar *OAuth2Router) handleSetOAuthSettingsPOST(w http.ResponseWriter, r *http.Request) {
 	//Update the settings
 	var oauth2ServerUrl, oauth2TokenURL, oauth2Scopes, oauth2UserInfoUrl, oauth2CodeChallengeMethod string
+	var oauth2ConfigurationCacheTime *time.Duration
 
 	oauth2ClientId, err := utils.PostPara(r, "oauth2ClientId")
 	if err != nil {
@@ -129,8 +143,14 @@ func (ar *OAuth2Router) handleSetOAuthSettingsPOST(w http.ResponseWriter, r *htt
 		return
 	}
 
-	oauth2WellKnownUrl, err := utils.PostPara(r, "oauth2WellKnownUrl")
+	oauth2ConfigurationCacheTime, err = utils.PostDuration(r, "oauth2ConfigurationCacheTime")
 	if err != nil {
+		utils.SendErrorResponse(w, "oauth2ConfigurationCacheTime not found")
+		return
+	}
+
+	oauth2WellKnownUrl, err := utils.PostPara(r, "oauth2WellKnownUrl")
+	if err != nil || oauth2WellKnownUrl == "" {
 		oauth2ServerUrl, err = utils.PostPara(r, "oauth2ServerUrl")
 		if err != nil {
 			utils.SendErrorResponse(w, "oauth2ServerUrl not found")
@@ -167,6 +187,7 @@ func (ar *OAuth2Router) handleSetOAuthSettingsPOST(w http.ResponseWriter, r *htt
 	ar.options.OAuth2ClientSecret = oauth2ClientSecret
 	ar.options.OAuth2Scopes = oauth2Scopes
 	ar.options.OAuth2CodeChallengeMethod = oauth2CodeChallengeMethod
+	ar.options.OAuth2ConfigurationCacheTime = oauth2ConfigurationCacheTime
 
 	//Write changes to database
 	ar.options.Database.Write("oauth2", "oauth2WellKnownUrl", oauth2WellKnownUrl)
@@ -177,6 +198,7 @@ func (ar *OAuth2Router) handleSetOAuthSettingsPOST(w http.ResponseWriter, r *htt
 	ar.options.Database.Write("oauth2", "oauth2ClientSecret", oauth2ClientSecret)
 	ar.options.Database.Write("oauth2", "oauth2Scopes", oauth2Scopes)
 	ar.options.Database.Write("oauth2", "oauth2CodeChallengeMethod", oauth2CodeChallengeMethod)
+	ar.options.Database.Write("oauth2", "oauth2ConfigurationCacheTime", oauth2ConfigurationCacheTime)
 
 	// Flush caches
 	ar.options.OAuth2ConfigCache.DeleteAll()
@@ -202,6 +224,7 @@ func (ar *OAuth2Router) handleSetOAuthSettingsDELETE(w http.ResponseWriter, r *h
 	ar.options.Database.Delete("oauth2", "oauth2ClientSecret")
 	ar.options.Database.Delete("oauth2", "oauth2Scopes")
 	ar.options.Database.Delete("oauth2", "oauth2CodeChallengeMethod")
+	ar.options.Database.Delete("oauth2", "oauth2ConfigurationCacheTime")
 
 	utils.SendOK(w)
 }
@@ -273,7 +296,7 @@ func (ar *OAuth2Router) HandleOAuth2Auth(w http.ResponseWriter, r *http.Request)
 	}
 
 	reqUrl := scheme + "://" + r.Host + r.RequestURI
-	oauthConfigCache, status := ar.options.OAuth2ConfigCache.GetOrSetFunc(r.Host, func() *oauth2.Config {
+	oauthConfigCache, _ := ar.options.OAuth2ConfigCache.GetOrSetFunc(r.Host, func() *oauth2.Config {
 		oauthConfig, err := ar.newOAuth2Conf(scheme + "://" + r.Host + callbackPrefix)
 		if err != nil {
 			ar.options.Logger.PrintAndLog("OAuth2Router", "Failed to fetch OIDC configuration:", err)

src/mod/utils/utils.go

@@ -81,6 +81,26 @@ func PostPara(r *http.Request, key string) (string, error) {
 	return x, nil
 }
 
+// Get POST parameter as time.Duration
+func PostDuration(r *http.Request, key string) (*time.Duration, error) {
+	// Try to parse the form
+	if err := r.ParseForm(); err != nil {
+		return nil, err
+	}
+	// Get first value from the form
+	x := r.Form.Get(key)
+	if len(x) == 0 {
+		return nil, errors.New("invalid " + key + " given")
+	}
+
+	duration, err := time.ParseDuration(x)
+
+	if err != nil {
+		return nil, errors.Join(errors.New("invalid "+key+" duration"), err)
+	}
+	return &duration, nil
+}
+
 // Get POST paramter as boolean, accept 1 or true
 func PostBool(r *http.Request, key string) (bool, error) {
 	x, err := PostPara(r, key)

src/start.go

@@ -190,7 +190,6 @@ func startupSequence() {
 	oauth2Router = oauth2.NewOAuth2Router(&oauth2.OAuth2RouterOptions{
 		Logger:   SystemWideLogger,
 		Database: sysdb,
-		OAuth2ConfigCacheTTL: oauth2ConfigurationCache,
 	})
 
 	//Create a statistic collector

src/web/components/sso.html

@@ -158,6 +158,13 @@
                 <input type="text" id="oauth2Scopes" name="oauth2Scopes" placeholder="Enter Scopes">
                 <small>Scopes required by the OAuth2 provider to retrieve information about the authenticated user. Refer to your OAuth2 provider documentation for more information about this. Optional if Well-Known url is configured.</small>
             </div>
+
+            <div class="field">
+                <label for="oauth2ConfigurationCacheTime">Configuration cache time</label>
+                <input type="text" id="oauth2ConfigurationCacheTime" name="oauth2ConfigurationCacheTime" placeholder="Enter Configuration Cache Time">
+                <small>Time to cache OAuth2 configuration before refresh. Accepts Go time.Duration format (e.g. 1m, 10m, 1h). Defaults to 60s.</small>
+            </div>
+
             <button class="ui basic button" type="submit"><i class="green check icon"></i> Apply Change</button>
             <button class="ui basic button" type="button" id="oauth2Clear"><i class="red trash icon"></i> Clear</button>
         </form>
@@ -319,6 +326,7 @@
                 $('#oauth2ClientId').val(data.oauth2ClientId);
                 $('#oauth2ClientSecret').val(data.oauth2ClientSecret);
                 $('#oauth2Scopes').val(data.oauth2Scopes);
+                $('#oauth2ConfigurationCacheTime').val(data.oauth2ConfigurationCacheTime);
                 $('[data-value="'+data.oauth2CodeChallengeMethod+'"]').click();
             },
             error: function(jqXHR, textStatus, errorThrown) {