update HttpHelper.kt

app/src/main/java/io/legado/app/help/http/HttpHelper.kt

@@ -6,6 +6,7 @@ import okhttp3.*
 import java.io.IOException
 import java.net.InetSocketAddress
 import java.net.Proxy
+import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.TimeUnit
 import kotlin.coroutines.resume
 import kotlin.coroutines.resumeWithException
@@ -13,6 +14,10 @@ import kotlin.coroutines.resumeWithException
 @Suppress("unused")
 object HttpHelper {
 
+    private val proxyClientCache: ConcurrentHashMap<String, OkHttpClient> by lazy {
+        ConcurrentHashMap()
+    }
+
     val client: OkHttpClient by lazy {
 
         val specs = arrayListOf(
@@ -55,31 +60,30 @@ object HttpHelper {
         })
     }
 
+    /**
+     * 缓存代理okHttp
+     */
     fun getProxyClient(proxy: String? = null): OkHttpClient {
         if (proxy.isNullOrBlank()) {
             return client
         }
+        proxyClientCache[proxy]?.let {
+            return it
+        }
         val r = Regex("(http|socks4|socks5)://(.*):(\\d{2,5})(@.*@.*)?")
         val ms = r.findAll(proxy)
         val group = ms.first()
-        val type: String     //直接连接
-        val host: String  //代理服务器hostname
-        val port: Int            //代理服务器port
         var username = ""       //代理服务器验证用户名
         var password = ""       //代理服务器验证密码
-        type = if (group.groupValues[1] == "http") {
-            "http"
-        } else {
-            "socks"
-        }
-        host = group.groupValues[2]
-        port = group.groupValues[3].toInt()
+        val type = if (group.groupValues[1] == "http") "http" else "socks"
+        val host = group.groupValues[2]
+        val port = group.groupValues[3].toInt()
         if (group.groupValues[4] != "") {
             username = group.groupValues[4].split("@")[1]
             password = group.groupValues[4].split("@")[2]
         }
-        val builder = client.newBuilder()
         if (type != "direct" && host != "") {
+            val builder = client.newBuilder()
             if (type == "http") {
                 builder.proxy(Proxy(Proxy.Type.HTTP, InetSocketAddress(host, port)))
             } else {
@@ -93,9 +97,11 @@ object HttpHelper {
                         .build()
                 }
             }
-
+            val proxyClient = builder.build()
+            proxyClientCache[proxy] = proxyClient
+            return proxyClient
         }
-        return builder.build()
+        return client
     }
 
     private fun getHeaderInterceptor(): Interceptor {