diff --git a/.env.example b/.env.example
index cc54ed2f..5f48a793 100644
--- a/.env.example
+++ b/.env.example
@@ -87,3 +87,6 @@ MEILISEARCH_HOST=127.0.0.1
 MEILISEARCH_PORT=7700
 MEILISEARCH_MASTER_KEY=
 
+CACHE_KEY_AGENT_ALLOW=all_agent_allows
+CACHE_KEY_AGENT_DENY=all_agent_denies
+
diff --git a/app/Console/Commands/Test.php b/app/Console/Commands/Test.php
index 7d5313ce..f12530d6 100644
--- a/app/Console/Commands/Test.php
+++ b/app/Console/Commands/Test.php
@@ -97,8 +97,9 @@ class Test extends Command
      */
     public function handle()
     {
-        $rep = new MeiliSearchRepository();
-        $rep->import();
+        $rep = new ExamRepository();
+        $r = $rep->listMatchExam(1);
+        dd($r);
     }
 
 }
diff --git a/app/Models/Exam.php b/app/Models/Exam.php
index 11fc524d..ccdc1259 100644
--- a/app/Models/Exam.php
+++ b/app/Models/Exam.php
@@ -12,7 +12,7 @@ class Exam extends NexusModel
     public $timestamps = true;
 
     protected $casts = [
-        'filters' => 'object',
+        'filters' => 'array',
         'indexes' => 'array',
     ];
 
@@ -116,25 +116,27 @@ class Exam extends NexusModel
         $currentFilters = $this->filters;
         $arr = [];
         $filter = self::FILTER_USER_CLASS;
-        if (!empty($currentFilters->{$filter})) {
-            $classes = collect(User::$classes)->only($currentFilters->{$filter});
+        if (!empty($currentFilters[$filter])) {
+            $classes = collect(User::$classes)->only($currentFilters[$filter]);
             $arr[] = sprintf('%s: %s', nexus_trans("exam.filters.$filter"), $classes->pluck('text')->implode(', '));
         }
 
         $filter = self::FILTER_USER_REGISTER_TIME_RANGE;
-        if (!empty($currentFilters->{$filter})) {
-            $range = $currentFilters->{$filter};
-            $arr[] = sprintf(
-                "%s: <br/>%s ~ %s",
-                nexus_trans("exam.filters.$filter"),
-                $range[0] ? Carbon::parse($range[0])->toDateTimeString() : '--',
-                $range[1] ? Carbon::parse($range[1])->toDateTimeString() : '--'
-            );
+        if (!empty($currentFilters[$filter])) {
+            $range = $currentFilters[$filter];
+            if (!empty($range[0]) || !empty($range[1])) {
+                $arr[] = sprintf(
+                    "%s: <br/>%s ~ %s",
+                    nexus_trans("exam.filters.$filter"),
+                    $range[0] ? Carbon::parse($range[0])->toDateTimeString() : '--',
+                    $range[1] ? Carbon::parse($range[1])->toDateTimeString() : '--'
+                );
+            }
         }
 
         $filter = self::FILTER_USER_DONATE;
-        if (!empty($currentFilters->{$filter})) {
-            $donateStatus = $classes = collect(User::$donateStatus)->only($currentFilters->{$filter});
+        if (!empty($currentFilters[$filter])) {
+            $donateStatus = collect(User::$donateStatus)->only($currentFilters[$filter]);
             $arr[] = sprintf('%s: %s', nexus_trans("exam.filters.$filter"), $donateStatus->pluck('text')->implode(', '));
         }
 
diff --git a/app/Repositories/AgentAllowRepository.php b/app/Repositories/AgentAllowRepository.php
index 1b261d56..7512ddf4 100644
--- a/app/Repositories/AgentAllowRepository.php
+++ b/app/Repositories/AgentAllowRepository.php
@@ -74,7 +74,8 @@ class AgentAllowRepository extends BaseRepository
     public function checkClient($peerId, $agent, $debug = false)
     {
         //check from high version to low version, if high version allow, stop!
-        $allows = NexusDB::remember("all_agent_allows", 3600, function () {
+        $cacheKey = nexus_env("CACHE_KEY_AGENT_ALLOW", "all_agent_allows") . ":php";
+        $allows = NexusDB::remember($cacheKey, 3600, function () {
             return AgentAllow::query()
                 ->orderBy('peer_id_start', 'desc')
                 ->orderBy('agent_start', 'desc')
@@ -190,8 +191,9 @@ class AgentAllowRepository extends BaseRepository
 
     private function checkIsDenied($peerId, $agent, $familyId)
     {
+        $cacheKey = nexus_env("CACHE_KEY_AGENT_DENY", "all_agent_denies") . ":php";
         /** @var Collection $allDenies */
-        $allDenies = NexusDB::remember("all_agent_denies", 3600, function () {
+        $allDenies = NexusDB::remember($cacheKey, 3600, function () {
             return AgentDeny::query()->get()->groupBy('family_id');
         });
         $agentDenies = $allDenies->get($familyId, []);
@@ -264,4 +266,71 @@ class AgentAllowRepository extends BaseRepository
 
     }
 
+    public function checkClientSimple($peerId, $agent, $debug = false)
+    {
+        //check from high version to low version, if high version allow, stop!
+        $cacheKey = nexus_env("CACHE_KEY_AGENT_ALLOW", "all_agent_allows") . ":php";
+        $allows = NexusDB::remember($cacheKey, 3600, function () {
+            return AgentAllow::query()
+                ->orderBy('peer_id_start', 'desc')
+                ->orderBy('agent_start', 'desc')
+                ->get();
+        });
+        $agentAllowPassed = null;
+        foreach ($allows as $agentAllow) {
+            $agentAllowId = $agentAllow->id;
+            $agentAllowLogPrefix = "[ID: $agentAllowId], peerId: $peerId";
+            $pattern = $agentAllow->peer_id_pattern;
+            //check peer_id, when handle scrape request, no peer_id, so let it pass
+            $isPeerIdAllowed = empty($pattern) || preg_match($pattern, $peerId);
+            $agentAllowLogPrefix .= ", peer_id pattern: $pattern, isPeerIdAllowed: $isPeerIdAllowed";
+
+            //check agent, agent must have both announce + scrape
+            $pattern = $agentAllow->agent_pattern;
+            $isAgentAllowed = !empty($pattern) && preg_match($pattern, $agent);
+            $agentAllowLogPrefix .= ", agent pattern: $pattern, isAgentAllowed: $isAgentAllowed";
+
+            //both OK, passed, client is allowed
+            if ($isPeerIdAllowed && $isAgentAllowed) {
+                $agentAllowPassed = $agentAllow;
+                do_log("$agentAllowLogPrefix, PASSED", 'debug');
+                break;
+            }
+            if ($debug) {
+                do_log("$agentAllowLogPrefix, NOT PASSED", 'debug');
+            }
+        }
+
+        if (!$agentAllowPassed) {
+            throw new ClientNotAllowedException("Banned Client, Please goto " . getSchemeAndHttpHost() . "/faq.php#id29 for a list of acceptable clients");
+        }
+
+        if ($debug) {
+            do_log("agentAllowPassed: " . $agentAllowPassed->toJson(), 'debug');
+        }
+
+        // check if exclude
+        if ($agentAllowPassed->exception == 'yes') {
+            $agentDeny = $this->checkIsDenied($peerId, $agent, $agentAllowPassed->id);
+            if ($agentDeny) {
+                if ($debug) {
+                    do_log("agentDeny: " . $agentDeny->toJson());
+                }
+                throw new ClientNotAllowedException(sprintf(
+                    "[%s-%s]Client: %s is banned due to: %s",
+                    $agentAllowPassed->id, $agentDeny->id, $agentDeny->name, $agentDeny->comment
+                ));
+            }
+        }
+        if (isHttps() && $agentAllowPassed->allowhttps != 'yes') {
+            throw new ClientNotAllowedException(sprintf(
+                "[%s]This client does not support https well, Please goto %s/faq.php#id29 for a list of proper clients",
+                $agentAllowPassed->id, getSchemeAndHttpHost()
+            ));
+        }
+
+        return $agentAllowPassed;
+
+    }
+
 }
diff --git a/app/Repositories/ExamRepository.php b/app/Repositories/ExamRepository.php
index 0db572af..0fc5c270 100644
--- a/app/Repositories/ExamRepository.php
+++ b/app/Repositories/ExamRepository.php
@@ -251,21 +251,24 @@ class ExamRepository extends BaseRepository
         $filters = $exam->filters;
 
         $filter = Exam::FILTER_USER_CLASS;
-        if (!empty($filters->{$filter}) && !in_array($user->class, $filters->{$filter})) {
-            do_log("$logPrefix, user class: {$user->class} not in: " . json_encode($filters->{$filter}));
+        $filterValues = $filters[$filter];
+        if (!empty($filterValues) && !in_array($user->class, $filterValues)) {
+            do_log("$logPrefix, user class: {$user->class} not in: " . json_encode($filterValues));
             return false;
         }
 
         $filter = Exam::FILTER_USER_DONATE;
-        if (!empty($filters->{$filter}) && !in_array($user->donate_status, $filters->{$filter})) {
-            do_log("$logPrefix, user donate status: {$user->donate_status} not in: " . json_encode($filters->{$filter}));
+        $filterValues = $filters[$filter];
+        if (!empty($filterValues) && !in_array($user->donate_status, $filterValues)) {
+            do_log("$logPrefix, user donate status: {$user->donate_status} not in: " . json_encode($filterValues));
             return false;
         }
 
         $filter = Exam::FILTER_USER_REGISTER_TIME_RANGE;
+        $filterValues = $filters[$filter];
         $added = $user->added->toDateTimeString();
-        $registerTimeBegin = isset($filters->{$filter}[0]) ? Carbon::parse($filters->{$filter}[0])->toDateTimeString() : '';
-        $registerTimeEnd = isset($filters->{$filter}[1]) ? Carbon::parse($filters->{$filter}[1])->toDateTimeString() : '';
+        $registerTimeBegin = isset($filterValues[0]) ? Carbon::parse($filterValues[0])->toDateTimeString() : '';
+        $registerTimeEnd = isset($filterValues[1]) ? Carbon::parse($filterValues[1])->toDateTimeString() : '';
         if (!empty($registerTimeBegin) && $added < $registerTimeBegin) {
             do_log("$logPrefix, user added: $added not bigger than begin: " . $registerTimeBegin);
             return false;
@@ -839,13 +842,13 @@ class ExamRepository extends BaseRepository
             ->orderBy("$userTable.id", "asc");
 
         $filter = Exam::FILTER_USER_CLASS;
-        if (!empty($filters->$filter)) {
-            $baseQuery->whereIn("$userTable.class", $filters->$filter);
+        if (!empty($filters[$filter])) {
+            $baseQuery->whereIn("$userTable.class", $filters[$filter]);
         }
 
         $filter = Exam::FILTER_USER_DONATE;
-        if (!empty($filters->$filter) && count($filters->$filter) == 1) {
-            $donateStatus = $filters->$filter[0];
+        if (!empty($filters[$filter]) && count($filters[$filter]) == 1) {
+            $donateStatus = $filters[$filter][0];
             if ($donateStatus == User::DONATE_YES) {
                 $baseQuery->where(function (Builder $query) {
                     $query->where('donor', 'yes')->where(function (Builder $query) {
@@ -865,7 +868,7 @@ class ExamRepository extends BaseRepository
         }
 
         $filter = Exam::FILTER_USER_REGISTER_TIME_RANGE;
-        $range = $filters->$filter;
+        $range = $filters[$filter];
         if (!empty($range)) {
             if (!empty($range[0])) {
                 $baseQuery->where("$userTable.added", ">=", Carbon::parse($range[0])->toDateTimeString());
diff --git a/include/constants.php b/include/constants.php
index f9c4fa02..365c8bd7 100644
--- a/include/constants.php
+++ b/include/constants.php
@@ -1,6 +1,6 @@
 <?php
-defined('VERSION_NUMBER') || define('VERSION_NUMBER', '1.8.1');
-defined('RELEASE_DATE') || define('RELEASE_DATE', '2023-04-21');
+defined('VERSION_NUMBER') || define('VERSION_NUMBER', '1.8.2');
+defined('RELEASE_DATE') || define('RELEASE_DATE', '2023-04-29');
 defined('IN_TRACKER') || define('IN_TRACKER', false);
 defined('PROJECTNAME') || define("PROJECTNAME","NexusPHP");
 defined('NEXUSPHPURL') || define("NEXUSPHPURL","https://nexusphp.org");
diff --git a/include/globalfunctions.php b/include/globalfunctions.php
index 39e619e5..cbc0fd67 100644
--- a/include/globalfunctions.php
+++ b/include/globalfunctions.php
@@ -1070,8 +1070,12 @@ function clear_inbox_count_cache($uid)
 function clear_agent_allow_deny_cache()
 {
     do_log("clear_agent_allow_deny_cache");
-    \Nexus\Database\NexusDB::cache_del("all_agent_allows");
-    \Nexus\Database\NexusDB::cache_del("all_agent_denies");
+    $allowCacheKey = nexus_env("CACHE_KEY_AGENT_ALLOW", "all_agent_allows");
+    $denyCacheKey = nexus_env("CACHE_KEY_AGENT_DENY", "all_agent_denies");
+    foreach (["", ":php", ":go"] as $suffix) {
+        \Nexus\Database\NexusDB::cache_del($allowCacheKey . $suffix);
+        \Nexus\Database\NexusDB::cache_del($denyCacheKey . $suffix);
+    }
 }