From 58afab572c189035717193934adf8378e14116e3 Mon Sep 17 00:00:00 2001
From: AriaLyy <511455842@qq.com>
Date: Fri, 30 Dec 2016 19:23:02 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E6=96=AD=E7=82=B9=E5=88=A4?=
 =?UTF-8?q?=E6=96=AD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../com/arialyy/aria/core/task/DownloadUtil.java     | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/Aria/src/main/java/com/arialyy/aria/core/task/DownloadUtil.java b/Aria/src/main/java/com/arialyy/aria/core/task/DownloadUtil.java
index f1558cb3..987d2b1f 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/task/DownloadUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/task/DownloadUtil.java
@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-
 package com.arialyy.aria.core.task;
 
 import android.content.Context;
@@ -30,7 +29,10 @@ import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
 import java.net.ProtocolException;
 import java.net.URL;
+import java.util.List;
+import java.util.Map;
 import java.util.Properties;
+import java.util.Set;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
@@ -198,6 +200,7 @@ final class DownloadUtil implements IDownloadUtil {
           URL               url  = new URL(downloadUrl);
           HttpURLConnection conn = (HttpURLConnection) url.openConnection();
           setConnectParam(conn);
+          conn.setRequestProperty("Range", "bytes=" + 0 + "-");
           conn.setConnectTimeout(mConnectTimeOut * 4);
           conn.connect();
           int len = conn.getContentLength();
@@ -206,7 +209,9 @@ final class DownloadUtil implements IDownloadUtil {
             return;
           }
           int code = conn.getResponseCode();
-          if (code == 200) {
+          //https://zh.wikipedia.org/wiki/HTTP%E7%8A%B6%E6%80%81%E7%A0%81
+          //206支持断点
+          if (code == HttpURLConnection.HTTP_PARTIAL) {
             int fileLength = conn.getContentLength();
             //必须建一个文件
             CommonUtil.createFile(filePath);
@@ -296,6 +301,9 @@ final class DownloadUtil implements IDownloadUtil {
                 mFixedThreadPool.execute(task);
               }
             }
+          } else if (code == HttpURLConnection.HTTP_OK) {
+            //在conn.setRequestProperty("Range", "bytes=" + 0 + "-");下，200为不支持断点状态
+            Log.w(TAG, "该下载链接不支持断点下载");
           } else {
             failDownload("下载失败，返回码：" + code);
           }