add url test

service/src/main/aidl/com/github/kr328/clash/callback/IUrlTestCallback.aidl

@@ -0,0 +1,5 @@
+package com.github.kr328.clash.callback;
+
+interface IUrlTestCallback {
+    void onResult(String proxy, long delay);
+}

service/src/main/aidl/com/github/kr328/clash/service/IClashService.aidl

@@ -4,6 +4,7 @@ import com.github.kr328.clash.service.IClashEventObserver;
 import com.github.kr328.clash.service.IClashEventService;
 import com.github.kr328.clash.service.IClashProfileService;
 import com.github.kr328.clash.service.IClashSettingService;
+import com.github.kr328.clash.callback.IUrlTestCallback;
 import com.github.kr328.clash.core.event.Event;
 import com.github.kr328.clash.core.model.Packet;
 
@@ -26,4 +27,5 @@ interface IClashService {
     // Query
     ProxyPacket queryAllProxies();
     GeneralPacket queryGeneral();
+    void startUrlTest(in String[] proxies, IUrlTestCallback callback);
 }

service/src/main/java/com/github/kr328/clash/service/ClashEventService.kt

@@ -5,7 +5,7 @@ import java.util.concurrent.Executors
 
 class ClashEventService(private val master: Master) : IClashEventService.Stub() {
     interface Master {
-        fun requireEvent(event: Int)
+        fun acquireEvent(event: Int)
         fun releaseEvent(event: Int)
     }
 
@@ -130,7 +130,7 @@ class ClashEventService(private val master: Master) : IClashEventService.Stub()
             }.toSet()
             val rel = EVENT_SET - req
 
-            req.forEach(master::requireEvent)
+            req.forEach(master::acquireEvent)
             rel.forEach(master::releaseEvent)
         }
     }

service/src/main/java/com/github/kr328/clash/service/ClashService.kt

@@ -6,6 +6,7 @@ import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
 import android.os.*
+import com.github.kr328.clash.callback.IUrlTestCallback
 import com.github.kr328.clash.core.Clash
 import com.github.kr328.clash.core.ClashProcess
 import com.github.kr328.clash.core.event.*
@@ -15,6 +16,7 @@ import com.github.kr328.clash.core.utils.Log
 import java.io.File
 import java.io.IOException
 import java.util.concurrent.Executors
+import kotlin.concurrent.thread
 
 class ClashService : Service(), IClashEventObserver, ClashEventService.Master,
     ClashProfileService.Master, ClashEventPuller.Master {
@@ -66,6 +68,24 @@ class ClashService : Service(), IClashEventObserver, ClashEventService.Master,
             }
         }
 
+        override fun startUrlTest(proxies: Array<out String>?, callback: IUrlTestCallback?) {
+            require(proxies != null && callback != null)
+
+            thread {
+                try {
+                    clash.startUrlTest(proxies.toList()) { name, delay ->
+                        callback.onResult(name, delay)
+                    }
+                }
+                catch (e: Exception) {
+                    Log.w("Url test failure", e)
+                }
+
+                callback.onResult(null, -1)
+                // Ignore exceptions
+            }
+        }
+
         override fun start() {
             try {
                 clash.process.start()
@@ -134,7 +154,7 @@ class ClashService : Service(), IClashEventObserver, ClashEventService.Master,
         }
     }
 
-    override fun requireEvent(event: Int) {
+    override fun acquireEvent(event: Int) {
         if (clash.process.getProcessStatus() == ProcessEvent.STOPPED)
             return
 
@@ -146,7 +166,6 @@ class ClashService : Service(), IClashEventObserver, ClashEventService.Master,
             Event.EVENT_BANDWIDTH ->
                 puller.startBandwidthPull()
         }
-
     }
 
     override fun releaseEvent(event: Int) {