diff --git a/Aria/src/main/java/com/arialyy/aria/core/Aria.java b/Aria/src/main/java/com/arialyy/aria/core/Aria.java
index b68d0c38..ed27fb18 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/Aria.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/Aria.java
@@ -131,15 +131,20 @@ import com.arialyy.aria.util.CommonUtil;
   private static Context convertContext(Object obj) {
     if (obj instanceof Application) {
       return (Application) obj;
-    } else if (obj instanceof Service) {
+    }
+    if (obj instanceof Service) {
       return (Service) obj;
-    } else if (obj instanceof Activity) {
+    }
+    if (obj instanceof Activity) {
       return (Activity) obj;
-    } else if (CommonUtil.isFragment(obj.getClass())) {
+    }
+    if (CommonUtil.isFragment(obj.getClass())) {
       return CommonUtil.getFragmentActivity(obj);
-    } else if (obj instanceof Dialog) {
+    }
+    if (obj instanceof Dialog) {
       return ((Dialog) obj).getContext();
-    } else if (obj instanceof PopupWindow) {
+    }
+    if (obj instanceof PopupWindow) {
       return ((PopupWindow) obj).getContentView().getContext();
     }
     ALog.e("Aria", "请使用download(this)或upload(this)");
diff --git a/DEV_LOG.md b/DEV_LOG.md
index 2e77da7d..8dfaba43 100644
--- a/DEV_LOG.md
+++ b/DEV_LOG.md
@@ -3,6 +3,7 @@
     - 修复一个正则表达式导致的文件名保存号异常问题 https://github.com/AriaLyy/Aria/issues/715
     - 修复一个匿名内部类中的内存溢出的问题 https://github.com/AriaLyy/Aria/issues/705
     - m3u8密钥下载地址转换器增加ts列表的url地址 https://github.com/AriaLyy/Aria/issues/718
+    - 现在http文件下载将使用HEAD请求获取文件大小，配置文件增加 <useHeadRequest value="false"/>
   + v_3.8.10 (2020/6/26)
     - fix bug https://github.com/AriaLyy/Aria/issues/703
     - fix bug https://github.com/AriaLyy/Aria/issues/702
diff --git a/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDFileInfoTask.java b/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDFileInfoTask.java
index 9834c217..c63e4f52 100644
--- a/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDFileInfoTask.java
+++ b/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDFileInfoTask.java
@@ -19,6 +19,7 @@ import android.net.TrafficStats;
 import android.net.Uri;
 import android.os.Process;
 import android.text.TextUtils;
+import android.util.Log;
 import com.arialyy.aria.core.AriaConfig;
 import com.arialyy.aria.core.common.CompleteInfo;
 import com.arialyy.aria.core.common.RequestEnum;
@@ -80,6 +81,10 @@ final class HttpDFileInfoTask implements IInfoTask, Runnable {
       conn = ConnectionHelp.handleConnection(url, taskOption);
       ConnectionHelp.setConnectParam(taskOption, conn);
       conn.setRequestProperty("Range", "bytes=" + 0 + "-");
+      if (AriaConfig.getInstance().getDConfig().isUseHeadRequest()){
+        ALog.d(TAG, "head请求");
+        conn.setRequestMethod("HEAD");
+      }
       conn.setConnectTimeout(mConnectTimeOut);
       conn.connect();
       handleConnect(conn);
@@ -333,6 +338,9 @@ final class HttpDFileInfoTask implements IInfoTask, Runnable {
     ConnectionHelp.setConnectParam(taskOption, conn);
     conn.setRequestProperty("Cookie", cookies);
     conn.setRequestProperty("Range", "bytes=" + 0 + "-");
+    if (AriaConfig.getInstance().getDConfig().isUseHeadRequest()){
+      conn.setRequestMethod("HEAD");
+    }
     conn.setConnectTimeout(mConnectTimeOut);
     conn.connect();
     handleConnect(conn);
diff --git a/PublicComponent/src/main/java/com/arialyy/aria/core/config/DGroupConfig.java b/PublicComponent/src/main/java/com/arialyy/aria/core/config/DGroupConfig.java
index c99ab3e9..0dc6a033 100644
--- a/PublicComponent/src/main/java/com/arialyy/aria/core/config/DGroupConfig.java
+++ b/PublicComponent/src/main/java/com/arialyy/aria/core/config/DGroupConfig.java
@@ -15,6 +15,7 @@
  */
 package com.arialyy.aria.core.config;
 
+import com.arialyy.aria.core.AriaConfig;
 import com.arialyy.aria.core.event.DGMaxNumEvent;
 import com.arialyy.aria.core.event.DSpeedEvent;
 import com.arialyy.aria.core.event.EventMsgUtil;
@@ -63,22 +64,7 @@ public class DGroupConfig extends BaseTaskConfig implements Serializable {
   }
 
   public DownloadConfig getSubConfig() {
-    if (subConfig == null) {
-      subConfig = new DownloadConfig();
-      subConfig.threadNum = 1;
-      subConfig.useBlock = false;
-      subConfig.buffSize = buffSize;
-      subConfig.caName = caName;
-      subConfig.caPath = caPath;
-      subConfig.connectTimeOut = connectTimeOut;
-      subConfig.iOTimeOut = iOTimeOut;
-      subConfig.isConvertSpeed = isConvertSpeed;
-      subConfig.maxSpeed = maxSpeed;
-      subConfig.queueMod = "now";
-      subConfig.reTryInterval = subReTryInterval;
-      subConfig.reTryNum = subReTryNum;
-      subConfig.updateInterval = updateInterval;
-    }
+    subConfig = AriaConfig.getInstance().getDConfig();
     return subConfig;
   }
 
diff --git a/PublicComponent/src/main/java/com/arialyy/aria/core/config/DownloadConfig.java b/PublicComponent/src/main/java/com/arialyy/aria/core/config/DownloadConfig.java
index 21114cce..fc63dbeb 100644
--- a/PublicComponent/src/main/java/com/arialyy/aria/core/config/DownloadConfig.java
+++ b/PublicComponent/src/main/java/com/arialyy/aria/core/config/DownloadConfig.java
@@ -44,6 +44,21 @@ public class DownloadConfig extends BaseTaskConfig implements Serializable {
    */
   boolean useBlock = true;
 
+  /**
+   * 设置http下载获取文件大小是否使用Head请求。true：使用head请求，false：使用默认的get请求
+   */
+  boolean useHeadRequest;
+
+  public boolean isUseHeadRequest() {
+    return useHeadRequest;
+  }
+
+  public DownloadConfig setUseHeadRequest(boolean useHeadRequest) {
+    this.useHeadRequest = useHeadRequest;
+    save();
+    return this;
+  }
+
   public boolean isUseBlock() {
     return useBlock;
   }
diff --git a/PublicComponent/src/main/java/com/arialyy/aria/core/config/XMLReader.java b/PublicComponent/src/main/java/com/arialyy/aria/core/config/XMLReader.java
index 0e25c6f1..e4859256 100644
--- a/PublicComponent/src/main/java/com/arialyy/aria/core/config/XMLReader.java
+++ b/PublicComponent/src/main/java/com/arialyy/aria/core/config/XMLReader.java
@@ -146,7 +146,7 @@ public class XMLReader extends DefaultHandler {
           break;
         case "subFailAsStop": // 子任务失败时回调stop
           setField("subFailAsStop", checkBoolean(value) ? Boolean.valueOf(value) : false,
-                  ConfigType.D_GROUP);
+              ConfigType.D_GROUP);
           break;
         case "subReTryNum": // 子任务重试次数
           int subReTryNum = checkInt(value) ? Integer.parseInt(value) : 5;
@@ -156,6 +156,10 @@ public class XMLReader extends DefaultHandler {
           int subReTryInterval = checkInt(value) ? Integer.parseInt(value) : 2000;
           setField("subReTryInterval", subReTryInterval, ConfigType.D_GROUP);
           break;
+        case "useHeadRequest": // 是否使用head请求
+          boolean useHeadRequest = checkBoolean(value) ? Boolean.valueOf(value) : true;
+          setField("useHeadRequest", useHeadRequest, ConfigType.DOWNLOAD);
+          break;
       }
     } else if (mType == ConfigType.APP) {
       String value = attributes.getValue("value");
diff --git a/app/src/main/assets/aria_config.xml b/app/src/main/assets/aria_config.xml
index 26922e63..ea5b0bfa 100644
--- a/app/src/main/assets/aria_config.xml
+++ b/app/src/main/assets/aria_config.xml
@@ -21,6 +21,10 @@
   <!--普通下载任务-->
   <download>
 
+    <!--设置http下载获取文件大小是否使用Head请求。true：使用head请求，false：使用默认的get请求-->
+    <!--只适用于3.8.11以上的版本-->
+    <useHeadRequest value="true"/>
+
     <!--设置任务最大下载速度，0表示不限速，单位为：kb-->
     <maxSpeed value="128"/>
 
diff --git a/app/src/main/java/com/arialyy/simple/core/download/m3u8/M3U8VodDLoadActivity.java b/app/src/main/java/com/arialyy/simple/core/download/m3u8/M3U8VodDLoadActivity.java
index 37567992..4e778dd0 100644
--- a/app/src/main/java/com/arialyy/simple/core/download/m3u8/M3U8VodDLoadActivity.java
+++ b/app/src/main/java/com/arialyy/simple/core/download/m3u8/M3U8VodDLoadActivity.java
@@ -364,7 +364,7 @@ public class M3U8VodDLoadActivity extends BaseActivity<ActivityM3u8VodBinding> {
 
   static class KeyUrlConverter implements IKeyUrlConverter {
 
-    @Override public String convert(String m3u8Url, String keyUrl) {
+    @Override public String convert(String m3u8Url, String tsListUrl, String keyUrl) {
       ALog.d("TAG", "convertUrl....");
       return null;
     }
diff --git a/app/src/main/java/com/arialyy/simple/core/upload/HttpUploadActivity.java b/app/src/main/java/com/arialyy/simple/core/upload/HttpUploadActivity.java
index 76fee636..f195346a 100644
--- a/app/src/main/java/com/arialyy/simple/core/upload/HttpUploadActivity.java
+++ b/app/src/main/java/com/arialyy/simple/core/upload/HttpUploadActivity.java
@@ -55,7 +55,9 @@ public class HttpUploadActivity extends BaseActivity<ActivitySingleBinding> {
     Aria.upload(this).getTaskList();
 
     mEntity = Aria.upload(this).getFirstUploadEntity(FILE_PATH);
-    getBinding().pl.setInfo(mEntity);
+    if (mEntity != null){
+      getBinding().pl.setInfo(mEntity);
+    }
     Aria.upload(this).register();
 
     getBinding().pl.setBtListener(new ProgressLayout.OnProgressLayoutBtListener() {