Fix SmoothStreaming manifest url for downloading

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=185526653

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashUtil.java

@@ -53,10 +53,8 @@ public final class DashUtil {
    */
   public static DashManifest loadManifest(DataSource dataSource, Uri uri)
       throws IOException {
-    DataSpec dataSpec = new DataSpec(uri,
-        DataSpec.FLAG_ALLOW_CACHING_UNKNOWN_LENGTH | DataSpec.FLAG_ALLOW_GZIP);
-    ParsingLoadable<DashManifest> loadable = new ParsingLoadable<>(dataSource, dataSpec,
-        C.DATA_TYPE_MANIFEST, new DashManifestParser());
+    ParsingLoadable<DashManifest> loadable =
+        new ParsingLoadable<>(dataSource, uri, C.DATA_TYPE_MANIFEST, new DashManifestParser());
     loadable.load();
     return loadable.getResult();
   }

library/hls/src/main/java/com/google/android/exoplayer2/source/hls/offline/HlsDownloader.java

@@ -104,10 +104,8 @@ public final class HlsDownloader extends SegmentDownloader<HlsMasterPlaylist, St
   }
 
   private static HlsPlaylist loadManifest(DataSource dataSource, Uri uri) throws IOException {
-    DataSpec dataSpec = new DataSpec(uri,
-        DataSpec.FLAG_ALLOW_CACHING_UNKNOWN_LENGTH | DataSpec.FLAG_ALLOW_GZIP);
-    ParsingLoadable<HlsPlaylist> loadable = new ParsingLoadable<>(dataSource, dataSpec,
-        C.DATA_TYPE_MANIFEST, new HlsPlaylistParser());
+    ParsingLoadable<HlsPlaylist> loadable =
+        new ParsingLoadable<>(dataSource, uri, C.DATA_TYPE_MANIFEST, new HlsPlaylistParser());
     loadable.load();
     return loadable.getResult();
   }

library/smoothstreaming/src/main/java/com/google/android/exoplayer2/source/smoothstreaming/SsMediaSource.java

@@ -36,13 +36,13 @@ import com.google.android.exoplayer2.source.ads.AdsMediaSource;
 import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifest;
 import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifest.StreamElement;
 import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifestParser;
+import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsUtil;
 import com.google.android.exoplayer2.upstream.Allocator;
 import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.Loader;
 import com.google.android.exoplayer2.upstream.LoaderErrorThrower;
 import com.google.android.exoplayer2.upstream.ParsingLoadable;
 import com.google.android.exoplayer2.util.Assertions;
-import com.google.android.exoplayer2.util.Util;
 import java.io.IOException;
 import java.util.ArrayList;
 
@@ -403,9 +403,7 @@ public final class SsMediaSource implements MediaSource,
       MediaSourceEventListener eventListener) {
     Assertions.checkState(manifest == null || !manifest.isLive);
     this.manifest = manifest;
-    this.manifestUri = manifestUri == null ? null
-        : Util.toLowerInvariant(manifestUri.getLastPathSegment()).matches("manifest(\\(.+\\))?")
-            ? manifestUri : Uri.withAppendedPath(manifestUri, "Manifest");
+    this.manifestUri = manifestUri == null ? null : SsUtil.fixManifestUri(manifestUri);
     this.manifestDataSourceFactory = manifestDataSourceFactory;
     this.manifestParser = manifestParser;
     this.chunkSourceFactory = chunkSourceFactory;

library/smoothstreaming/src/main/java/com/google/android/exoplayer2/source/smoothstreaming/manifest/SsUtil.java

+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.android.exoplayer2.source.smoothstreaming.manifest;
+
+import android.net.Uri;
+import com.google.android.exoplayer2.util.Util;
+
+/** SmoothStreaming related utility methods. */
+public final class SsUtil {
+
+  /** Returns a fixed SmoothStreaming client manifest {@link Uri}. */
+  public static Uri fixManifestUri(Uri manifestUri) {
+    if (Util.toLowerInvariant(manifestUri.getLastPathSegment()).matches("manifest(\\(.+\\))?")) {
+      return manifestUri;
+    }
+    return Uri.withAppendedPath(manifestUri, "Manifest");
+  }
+
+  private SsUtil() {}
+}

library/smoothstreaming/src/main/java/com/google/android/exoplayer2/source/smoothstreaming/offline/SsDownloader.java

@@ -22,6 +22,7 @@ import com.google.android.exoplayer2.offline.SegmentDownloader;
 import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifest;
 import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifest.StreamElement;
 import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifestParser;
+import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsUtil;
 import com.google.android.exoplayer2.source.smoothstreaming.manifest.TrackKey;
 import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.DataSpec;
@@ -64,7 +65,7 @@ public final class SsDownloader extends SegmentDownloader<SsManifest, TrackKey>
    * @see SegmentDownloader#SegmentDownloader(Uri, DownloaderConstructorHelper)
    */
   public SsDownloader(Uri manifestUri, DownloaderConstructorHelper constructorHelper)  {
-    super(manifestUri, constructorHelper);
+    super(SsUtil.fixManifestUri(manifestUri), constructorHelper);
   }
 
   @Override
@@ -82,10 +83,8 @@ public final class SsDownloader extends SegmentDownloader<SsManifest, TrackKey>
 
   @Override
   protected SsManifest getManifest(DataSource dataSource, Uri uri) throws IOException {
-    DataSpec dataSpec = new DataSpec(uri,
-        DataSpec.FLAG_ALLOW_CACHING_UNKNOWN_LENGTH | DataSpec.FLAG_ALLOW_GZIP);
-    ParsingLoadable<SsManifest> loadable = new ParsingLoadable<>(dataSource, dataSpec,
-        C.DATA_TYPE_MANIFEST, new SsManifestParser());
+    ParsingLoadable<SsManifest> loadable =
+        new ParsingLoadable<>(dataSource, uri, C.DATA_TYPE_MANIFEST, new SsManifestParser());
     loadable.load();
     return loadable.getResult();
   }