From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Orion Hodson <oth@google.com>
Date: Thu, 7 Apr 2022 21:42:04 +0100
Subject: [PATCH] Uri: check authority and scheme as part of determining URI
 path

The interpretation of the path depends on whether the scheme or
authority are specified and should be observed when unparcelling
URIs.

Bug: 171966843
Test: atest FrameworksCoreTests:android.net.UriTest
Test: atest com.android.devicehealthchecks.SystemAppCheck
Change-Id: I06981d1c6e387b16df792494523994518848db37
Merged-In: I06981d1c6e387b16df792494523994518848db37
(cherry picked from commit f37a94ae920fa5879c557603fc285942ec4b84b1)
(cherry picked from commit on googleplex-android-review.googlesource.com host: c87f0623be4042c39a9b73f7a6e02aa116925e50)
Merged-In: I06981d1c6e387b16df792494523994518848db37
---
 core/java/android/net/Uri.java | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/core/java/android/net/Uri.java b/core/java/android/net/Uri.java
index 6c069be07e3e..24941a4055f3 100644
--- a/core/java/android/net/Uri.java
+++ b/core/java/android/net/Uri.java
@@ -1164,13 +1164,16 @@ public abstract class Uri implements Parcelable, Comparable<Uri> {
         }
 
         static Uri readFrom(Parcel parcel) {
-            return new HierarchicalUri(
-                parcel.readString(),
-                Part.readFrom(parcel),
-                PathPart.readFrom(parcel),
-                Part.readFrom(parcel),
-                Part.readFrom(parcel)
-            );
+            final String scheme = parcel.readString();
+            final Part authority = Part.readFrom(parcel);
+            // In RFC3986 the path should be determined based on whether there is a scheme or
+            // authority present (https://www.rfc-editor.org/rfc/rfc3986.html#section-3.3).
+            final boolean hasSchemeOrAuthority =
+                    (scheme != null && scheme.length() > 0) || !authority.isEmpty();
+            final PathPart path = PathPart.readFrom(hasSchemeOrAuthority, parcel);
+            final Part query = Part.readFrom(parcel);
+            final Part fragment = Part.readFrom(parcel);
+            return new HierarchicalUri(scheme, authority, path, query, fragment);
         }
 
         public int describeContents() {
@@ -2224,6 +2227,11 @@ public abstract class Uri implements Parcelable, Comparable<Uri> {
             }
         }
 
+        static PathPart readFrom(boolean hasSchemeOrAuthority, Parcel parcel) {
+            final PathPart path = readFrom(parcel);
+            return hasSchemeOrAuthority ? makeAbsolute(path) : path;
+        }
+
         /**
          * Creates a path from the encoded string.
          *
