From b4fe17af341c99eb125c6d2e6bb2b85fc7c98441 Mon Sep 17 00:00:00 2001
From: Jeff Sharkey <jsharkey@android.com>
Date: Tue, 27 Mar 2018 09:21:54 -0600
Subject: Return underlying MIME type of download.

Only return extension-based MIME types for raw files.

Test: none
Bug: 73736356
Change-Id: I228916fd408cd95f1acf43817fa43ee8646cbd4e
---
 .../providers/downloads/DownloadStorageProvider.java    | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/com/android/providers/downloads/DownloadStorageProvider.java b/src/com/android/providers/downloads/DownloadStorageProvider.java
index 514afdd3..afcba961 100644
--- a/src/com/android/providers/downloads/DownloadStorageProvider.java
+++ b/src/com/android/providers/downloads/DownloadStorageProvider.java
@@ -365,6 +365,23 @@ public class DownloadStorageProvider extends FileSystemProvider {
         return result;
     }
 
+    @Override
+    public String getDocumentType(String docId) throws FileNotFoundException {
+        // Delegate to real provider
+        final long token = Binder.clearCallingIdentity();
+        try {
+            if (RawDocumentsHelper.isRawDocId(docId)) {
+                return super.getDocumentType(docId);
+            }
+
+            final long id = Long.parseLong(docId);
+            final ContentResolver resolver = getContext().getContentResolver();
+            return resolver.getType(mDm.getDownloadUri(id));
+        } finally {
+            Binder.restoreCallingIdentity(token);
+        }
+    }
+
     @Override
     public ParcelFileDescriptor openDocument(String docId, String mode, CancellationSignal signal)
             throws FileNotFoundException {
-- 
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