Support health-check for single node

core/src/main/cpp/main.c

@@ -185,8 +185,8 @@ Java_com_github_kr328_clash_core_bridge_Bridge_nativeQueryGroup(JNIEnv *env, job
 
 JNIEXPORT void JNICALL
 Java_com_github_kr328_clash_core_bridge_Bridge_nativeHealthCheck(JNIEnv *env, jobject thiz,
-                                                                 jobject completable,
-                                                                 jstring name) {
+                                                                  jobject completable,
+                                                                  jstring name) {
     TRACE_METHOD();
 
     jobject _completable = new_global(completable);
@@ -195,6 +195,20 @@ Java_com_github_kr328_clash_core_bridge_Bridge_nativeHealthCheck(JNIEnv *env, jo
     healthCheck(_completable, _name);
 }
 
+JNIEXPORT void JNICALL
+Java_com_github_kr328_clash_core_bridge_Bridge_nativeHealthCheckProxy(JNIEnv *env, jobject thiz,
+                                                                       jobject completable,
+                                                                       jstring groupName,
+                                                                       jstring proxyName) {
+    TRACE_METHOD();
+
+    jobject _completable = new_global(completable);
+    scoped_string _groupName = get_string(groupName);
+    scoped_string _proxyName = get_string(proxyName);
+
+    healthCheckProxy(_completable, _groupName, _proxyName);
+}
+
 JNIEXPORT void JNICALL
 Java_com_github_kr328_clash_core_bridge_Bridge_nativeHealthCheckAll(JNIEnv *env, jobject thiz) {
     TRACE_METHOD();
@@ -526,4 +540,4 @@ Java_com_github_kr328_clash_core_bridge_Bridge_nativeCoreVersion(JNIEnv *env, jo
     char* Version = make_String(GIT_VERSION);
 
     return new_string(Version);
-}
+}

core/src/main/golang/native/tunnel.go

@@ -74,6 +74,15 @@ func healthCheck(completable unsafe.Pointer, name C.c_string) {
 	}(C.GoString(name))
 }
 
+//export healthCheckProxy
+func healthCheckProxy(completable unsafe.Pointer, groupName C.c_string, proxyName C.c_string) {
+	go func(groupName string, proxyName string) {
+		tunnel.HealthCheckProxy(groupName, proxyName)
+
+		C.complete(completable, nil)
+	}(C.GoString(groupName), C.GoString(proxyName))
+}
+
 //export healthCheckAll
 func healthCheckAll() {
 	tunnel.HealthCheckAll()

core/src/main/golang/native/tunnel/connectivity.go

@@ -1,14 +1,42 @@
 package tunnel
 
 import (
+	"context"
 	"sync"
+	"time"
 
 	"github.com/metacubex/mihomo/adapter/outboundgroup"
+	C "github.com/metacubex/mihomo/constant"
 	"github.com/metacubex/mihomo/constant/provider"
 	"github.com/metacubex/mihomo/log"
 	"github.com/metacubex/mihomo/tunnel"
 )
 
+const healthCheckTimeout = 5 * time.Second
+const defaultHealthCheckURL = "https://www.gstatic.com/generate_204"
+
+func probeURL(proxy C.Proxy, proxyName string) {
+	testURL := defaultHealthCheckURL
+	for k := range proxy.ExtraDelayHistories() {
+		if len(k) > 0 {
+			testURL = k
+			break
+		}
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), healthCheckTimeout)
+	defer cancel()
+
+	if _, err := proxy.URLTest(ctx, testURL, nil); err != nil && ctx.Err() == nil {
+		log.Warnln(
+			"Request health check for `%s` with url `%s` failed: %s",
+			proxyName,
+			testURL,
+			err.Error(),
+		)
+	}
+}
+
 func HealthCheck(name string) {
 	p := tunnel.Proxies()[name]
 
@@ -20,7 +48,7 @@ func HealthCheck(name string) {
 
 	g, ok := p.Adapter().(outboundgroup.ProxyGroup)
 	if !ok {
-		log.Warnln("Request health check for `%s`: invalid type %s", name, p.Type().String())
+		probeURL(p, name)
 
 		return
 	}
@@ -47,3 +75,39 @@ func HealthCheckAll() {
 		}(g)
 	}
 }
+
+func HealthCheckProxy(groupName string, proxyName string) {
+	p := tunnel.Proxies()[groupName]
+
+	if p == nil {
+		log.Warnln(
+			"Request health check for proxy `%s` in group `%s`: group not found",
+			proxyName,
+			groupName,
+		)
+		return
+	}
+
+	g, ok := p.Adapter().(outboundgroup.ProxyGroup)
+	if !ok {
+		log.Warnln(
+			"Request health check for proxy `%s` in group `%s`: not a proxy group",
+			proxyName,
+			groupName,
+		)
+		return
+	}
+
+	for _, proxy := range g.Proxies() {
+		if proxy.Name() == proxyName {
+			probeURL(proxy, proxyName)
+			return
+		}
+	}
+
+	log.Warnln(
+		"Request health check for proxy `%s` in group `%s`: proxy not found",
+		proxyName,
+		groupName,
+	)
+}

core/src/main/kotlin/com/github/kr328/clash/core/Clash.kt

@@ -133,6 +133,12 @@ object Clash {
     return CompletableDeferred<Unit>().apply { Bridge.nativeHealthCheck(this, name) }
   }
 
+  fun healthCheckProxy(groupName: String, proxyName: String): CompletableDeferred<Unit> {
+    return CompletableDeferred<Unit>().apply {
+      Bridge.nativeHealthCheckProxy(this, groupName, proxyName)
+    }
+  }
+
   fun healthCheckAll() {
     Bridge.nativeHealthCheckAll()
   }

core/src/main/kotlin/com/github/kr328/clash/core/bridge/Bridge.kt

@@ -49,6 +49,12 @@ object Bridge {
 
   external fun nativeHealthCheck(completable: CompletableDeferred<Unit>, name: String)
 
+  external fun nativeHealthCheckProxy(
+    completable: CompletableDeferred<Unit>,
+    groupName: String,
+    proxyName: String,
+  )
+
   external fun nativeHealthCheckAll()
 
   external fun nativePatchSelector(selector: String, name: String): Boolean

service/src/main/kotlin/com/github/kr328/clash/service/ClashManager.kt

@@ -86,6 +86,10 @@ class ClashManager(private val context: Context) :
     return Clash.healthCheck(group).await()
   }
 
+  override suspend fun healthCheckProxy(group: String, name: String) {
+    return Clash.healthCheckProxy(group, name).await()
+  }
+
   override suspend fun updateProvider(type: Provider.Type, name: String) {
     return Clash.updateProvider(type, name).await()
   }

service/src/main/kotlin/com/github/kr328/clash/service/remote/IClashManager.kt

@@ -29,6 +29,8 @@ interface IClashManager {
 
   suspend fun healthCheck(group: String)
 
+  suspend fun healthCheckProxy(group: String, name: String)
+
   suspend fun updateProvider(type: Provider.Type, name: String)
 
   fun queryOverride(slot: Clash.OverrideSlot): ConfigurationOverride

ui/proxy/src/main/kotlin/com/github/kr328/clash/proxy/ui/ProxyScreen.kt

@@ -22,6 +22,7 @@ import androidx.compose.foundation.pager.PagerState
 import androidx.compose.foundation.pager.rememberPagerState
 import androidx.compose.foundation.selection.selectable
 import androidx.compose.foundation.selection.toggleable
+import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.Checkbox
 import androidx.compose.material3.CircularProgressIndicator
@@ -114,6 +115,7 @@ internal fun ProxyScreen(
     onProxySortChanged = viewModel::onProxySortChanged,
     onOverrideModeSelected = viewModel::onOverrideModeSelected,
     onProxySelected = viewModel::onProxySelected,
+    onProxyDelayTest = viewModel::onProxyDelayTest,
   )
 }
 
@@ -130,6 +132,7 @@ private fun ProxyContent(
   onProxySortChanged: (ProxySort) -> Unit,
   onOverrideModeSelected: (TunnelState.Mode?) -> Unit,
   onProxySelected: (Int, String) -> Unit,
+  onProxyDelayTest: (Int, String) -> Unit,
 ) {
   var menuVisible by remember { mutableStateOf(false) }
   var scrollSelectedToTopRequestVersion by remember { mutableIntStateOf(0) }
@@ -276,6 +279,7 @@ private fun ProxyContent(
           pagerState = pagerState ?: return@Box,
           gridStates = gridStates,
           onProxySelected = onProxySelected,
+          onProxyDelayTest = onProxyDelayTest,
         )
       }
     }
@@ -291,6 +295,7 @@ private fun ProxyPagerContent(
   pagerState: PagerState,
   gridStates: List<LazyGridState>,
   onProxySelected: (Int, String) -> Unit,
+  onProxyDelayTest: (Int, String) -> Unit,
 ) {
   val groupNames = uiState.groupNames
   if (groupNames.isEmpty()) return
@@ -322,6 +327,7 @@ private fun ProxyPagerContent(
         gridState = gridStates[page],
         selectedProxies = selectedProxies,
         onProxySelected = onProxySelected,
+        onProxyDelayTest = onProxyDelayTest,
       )
     }
   }
@@ -339,6 +345,7 @@ private fun ProxyGroupPage(
   gridState: LazyGridState,
   selectedProxies: List<SelectedProxy>,
   onProxySelected: (Int, String) -> Unit,
+  onProxyDelayTest: (Int, String) -> Unit,
 ) {
   val sources = group.sources
   val refreshVersion = group.refreshVersion
@@ -384,6 +391,7 @@ private fun ProxyGroupPage(
             selectedBackground = selectedBackground,
             unselectedControl = unselectedControl,
             unselectedBackground = unselectedBackground,
+            delayTesting = source.proxy.name in group.delayTestingKeys,
           )
         }
 
@@ -392,6 +400,7 @@ private fun ProxyGroupPage(
         proxyLine = proxyLine,
         selectable = group.selectable,
         onClick = { onProxySelected(index, item.key) },
+        onDelayClick = { onProxyDelayTest(index, item.key) },
       )
     }
   }
@@ -403,6 +412,7 @@ private fun ProxyItemCard(
   proxyLine: Int,
   selectable: Boolean,
   onClick: () -> Unit,
+  onDelayClick: () -> Unit,
 ) {
   val shape = RoundedCornerShape(if (proxyLine == 1) 0.dp else 5.dp)
   val modifier =
@@ -438,14 +448,18 @@ private fun ProxyItemCard(
       )
     }
 
-    if (item.delayText.isNotEmpty()) {
-      Text(
-        text = item.delayText,
-        color = item.controls,
-        style = MaterialTheme.typography.bodyMedium,
-        maxLines = 1,
-      )
-    }
+    val badgeText = if (item.delayTesting) delayTestingPlaceholder else item.delayText
+    Text(
+      modifier =
+        Modifier.clip(CircleShape)
+          .clickable(onClick = onDelayClick)
+          .background(item.controls.copy(alpha = if (item.delayTesting) 0.33f else 0.14f))
+          .padding(horizontal = 8.dp, vertical = 2.dp),
+      text = badgeText,
+      color = item.controls,
+      style = MaterialTheme.typography.bodyMedium,
+      maxLines = 1,
+    )
   }
 }
 
@@ -575,6 +589,7 @@ private fun ProxyMenuRadioRow(title: String, selected: Boolean, onClick: () -> U
 }
 
 private val gridContentPadding = 12.dp
+private const val delayTestingPlaceholder = "···"
 
 private fun columnsForProxyLine(proxyLine: Int): Int =
   when (proxyLine) {
@@ -659,5 +674,6 @@ private fun ProxyContentPreview() {
     onProxySortChanged = {},
     onOverrideModeSelected = {},
     onProxySelected = { _, _ -> },
+    onProxyDelayTest = { _, _ -> },
   )
 }

ui/proxy/src/main/kotlin/com/github/kr328/clash/proxy/vm/ProxyViewModel.kt

@@ -173,6 +173,29 @@ internal class ProxyViewModel(app: Application) : AndroidViewModel(app), Default
     }
   }
 
+  fun onProxyDelayTest(index: Int, name: String) {
+    val names = uiState.value.groupNames
+    if (index !in names.indices) return
+
+    updateGroupState(index) {
+      it.copy(delayTestingKeys = it.delayTestingKeys + name, refreshVersion = it.refreshVersion + 1)
+    }
+
+    viewModelScope.launch {
+      try {
+        withClash { healthCheckProxy(names[index], name) }
+        reload(index)
+      } finally {
+        updateGroupState(index) {
+          it.copy(
+            delayTestingKeys = it.delayTestingKeys - name,
+            refreshVersion = it.refreshVersion + 1,
+          )
+        }
+      }
+    }
+  }
+
   fun reloadAll() {
     val names = uiState.value.groupNames
     names.indices.forEach { idx -> reload(idx) }
@@ -207,6 +230,8 @@ internal class ProxyViewModel(app: Application) : AndroidViewModel(app), Default
           selectable = group.type == Proxy.Type.Selector,
           urlTesting = false,
           sources = sources,
+          delayTestingKeys =
+            it.delayTestingKeys.intersect(sources.mapTo(mutableSetOf()) { s -> s.proxy.name }),
           refreshVersion = it.refreshVersion + 1,
         )
       }
@@ -239,6 +264,7 @@ internal class ProxyViewModel(app: Application) : AndroidViewModel(app), Default
       val selectable: Boolean = false,
       val urlTesting: Boolean = false,
       val sources: List<ProxyItemSource> = emptyList(),
+      val delayTestingKeys: Set<String> = emptySet(),
       val refreshVersion: Int = 0,
     )
 
@@ -251,6 +277,7 @@ internal class ProxyViewModel(app: Application) : AndroidViewModel(app), Default
         selectedBackground: Color,
         unselectedControl: Color,
         unselectedBackground: Color,
+        delayTesting: Boolean,
       ): ProxyItemUiState {
         val selected = proxy.name == parentNow?.name
         val background =
@@ -278,7 +305,8 @@ internal class ProxyViewModel(app: Application) : AndroidViewModel(app), Default
           key = proxy.name,
           title = title,
           subtitle = subtitle,
-          delayText = if (proxy.delay in 0..Short.MAX_VALUE) proxy.delay.toString() else "",
+          delayText = if (proxy.delay in 0..Short.MAX_VALUE) proxy.delay.toString() else "--",
+          delayTesting = delayTesting,
           selected = selected,
           background = background,
           controls = controls,
@@ -291,6 +319,7 @@ internal class ProxyViewModel(app: Application) : AndroidViewModel(app), Default
       val title: String,
       val subtitle: String,
       val delayText: String,
+      val delayTesting: Boolean,
       val selected: Boolean,
       val background: Color,
       val controls: Color,