fix: optimize memory usage, fix agent and code refactor (#118)

* refactor: simplify io code and make utils module independent

* fix(docker): agent and socket-proxy docker event flushing with modified reverse proxy handler

* refactor: remove unused code

* refactor: remove the use of logging module in most code

* refactor: streamline domain mismatch check in certState function

* tweak: use ecdsa p-256 for autocert

* fix(tests): update health check tests for invalid host and add case for port in host

* feat(acme): custom acme directory

* refactor: code refactor and improved context and error handling

* tweak: optimize memory usage under load

* fix(oidc): restore old user matching behavior

* docs: add ChatGPT assistant to README

---------

Co-authored-by: yusing <yusing@6uo.me>

agent/pkg/handler/check_health_test.go

@@ -172,9 +172,9 @@ func TestCheckHealthTCPUDP(t *testing.T) {
 		{
 			name:            "InvalidHost",
 			scheme:          "tcp",
-			host:            "invalid",
+			host:            "",
 			port:            8080,
-			expectedStatus:  http.StatusOK,
+			expectedStatus:  http.StatusBadRequest,
 			expectedHealthy: false,
 		},
 		{
@@ -188,9 +188,17 @@ func TestCheckHealthTCPUDP(t *testing.T) {
 		{
 			name:            "InvalidHost",
 			scheme:          "udp",
-			host:            "invalid",
+			host:            "",
 			port:            8080,
-			expectedStatus:  http.StatusOK,
+			expectedStatus:  http.StatusBadRequest,
+			expectedHealthy: false,
+		},
+		{
+			name:            "Port in both host and port",
+			scheme:          "tcp",
+			host:            "localhost:1234",
+			port:            1234,
+			expectedStatus:  http.StatusBadRequest,
 			expectedHealthy: false,
 		},
 	}
@@ -208,9 +216,11 @@ func TestCheckHealthTCPUDP(t *testing.T) {
 
 			require.Equal(t, recorder.Code, tt.expectedStatus)
 
-			var result health.HealthCheckResult
-			require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &result))
-			require.Equal(t, result.Healthy, tt.expectedHealthy)
+			if tt.expectedStatus == http.StatusOK {
+				var result health.HealthCheckResult
+				require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &result))
+				require.Equal(t, result.Healthy, tt.expectedHealthy)
+			}
 		})
 	}
 }