From 2a5b81a6eafda5b9d78ad282f351c289f0847c45 Mon Sep 17 00:00:00 2001
From: Tianhua Ran <tianhua.ran@liulishuo.com>
Date: Sun, 11 Mar 2018 13:38:32 +0800
Subject: [PATCH] fix: cannot get content length during download connections

should get content length from Content-Range if there is no Content-Length in the response during download connections

close #967
---
 .../com/liulishuo/filedownloader/util/FileDownloadUtils.java     | 1 +
 1 file changed, 1 insertion(+)

diff --git a/library/src/main/java/com/liulishuo/filedownloader/util/FileDownloadUtils.java b/library/src/main/java/com/liulishuo/filedownloader/util/FileDownloadUtils.java
index 9cc88193..97703478 100644
--- a/library/src/main/java/com/liulishuo/filedownloader/util/FileDownloadUtils.java
+++ b/library/src/main/java/com/liulishuo/filedownloader/util/FileDownloadUtils.java
@@ -578,6 +578,7 @@ public static long findInstanceLengthFromContentRange(FileDownloadConnection con
     public static long findContentLength(final int id, FileDownloadConnection connection) {
         long contentLength = FileDownloadUtils
                 .convertContentLengthString(connection.getResponseHeaderField("Content-Length"));
+        if (contentLength < 0) contentLength = findInstanceLengthFromContentRange(connection);
         final String transferEncoding = connection.getResponseHeaderField("Transfer-Encoding");
 
         if (contentLength < 0) {