Merge Release 4.10.1 into Master (#896)

* Version bumps for Firebase 4.10.1 (#891)

* Minimal fix for b/74357976 (#890)

Fixes b/74357976 which caused unauthenticated users to be unable to reach the Firestore backend and updates the changelog.

* Copy all C++ strings to NSString where they're not obviously safe (#893)

This fixes a known instances of memory corruption where in
FSTLevelDBMutationQueue, the NSString view was retained for later, and
the incorrect user was used, causing b/74381054.

gRPC does not necessarily copy its string argumnets and if our hostname
were configured to a non-default one it's possible that we could corrupt
the host cache too.

All remaining usages of util::WrapNSStringNoCopy are obviously safe:
passed into logging or other known transient usages.

* fix lint

3 files changed, 11 insertions, 9 deletions

diff --git a/Firestore/Source/Remote/FSTDatastore.mm b/Firestore/Source/Remote/FSTDatastore.mm
index cb4516e..3b536ab 100644
--- a/Firestore/Source/Remote/FSTDatastore.mm
+++ b/Firestore/Source/Remote/FSTDatastore.mm
@@ -97,7 +97,7 @@ typedef GRPCProtoCall * (^RPCFactory)(void);
                          credentials:(CredentialsProvider *)credentials {
   if (self = [super init]) {
     _databaseInfo = databaseInfo;
-    NSString *host = util::WrapNSStringNoCopy(databaseInfo->host());
+    NSString *host = util::WrapNSString(databaseInfo->host());
     if (!databaseInfo->ssl_enabled()) {
       GRPCHost *hostConfig = [GRPCHost hostWithAddress:host];
       hostConfig.secure = NO;
@@ -319,7 +319,8 @@ typedef GRPCProtoCall * (^RPCFactory)(void);
             [FSTDatastore
                 prepareHeadersForRPC:rpc
                           databaseID:&self.databaseInfo->database_id()
-                               token:(result.is_valid() ? result.token() : absl::string_view())];
+                               token:(result.user().is_authenticated() ? result.token()
+                                                                       : absl::string_view())];
             [rpc start];
           }
         }];
diff --git a/Firestore/Source/Remote/FSTSerializerBeta.mm b/Firestore/Source/Remote/FSTSerializerBeta.mm
index 0fd7d33..00391ec 100644
--- a/Firestore/Source/Remote/FSTSerializerBeta.mm
+++ b/Firestore/Source/Remote/FSTSerializerBeta.mm
@@ -152,8 +152,8 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (FSTResourcePath *)encodedResourcePathForDatabaseID:(const DatabaseId *)databaseID {
   return [FSTResourcePath pathWithSegments:@[
-    @"projects", util::WrapNSStringNoCopy(databaseID->project_id()), @"databases",
-    util::WrapNSStringNoCopy(databaseID->database_id())
+    @"projects", util::WrapNSString(databaseID->project_id()), @"databases",
+    util::WrapNSString(databaseID->database_id())
   ]];
 }
 
diff --git a/Firestore/Source/Remote/FSTStream.mm b/Firestore/Source/Remote/FSTStream.mm
index 6735df1..44e3ef0 100644
--- a/Firestore/Source/Remote/FSTStream.mm
+++ b/Firestore/Source/Remote/FSTStream.mm
@@ -297,9 +297,10 @@ static const NSTimeInterval kIdleTimeout = 60.0;
   _rpc = [self createRPCWithRequestsWriter:self.requestsWriter];
   [_rpc setResponseDispatchQueue:self.workerDispatchQueue.queue];
 
-  [FSTDatastore prepareHeadersForRPC:_rpc
-                          databaseID:&self.databaseInfo->database_id()
-                               token:(token.is_valid() ? token.token() : absl::string_view())];
+  [FSTDatastore
+      prepareHeadersForRPC:_rpc
+                databaseID:&self.databaseInfo->database_id()
+                     token:(token.user().is_authenticated() ? token.token() : absl::string_view())];
   FSTAssert(_callbackFilter == nil, @"GRX Filter must be nil");
   _callbackFilter = [[FSTCallbackFilter alloc] initWithStream:self];
   [_rpc startWithWriteable:_callbackFilter];
@@ -631,7 +632,7 @@ static const NSTimeInterval kIdleTimeout = 60.0;
 }
 
 - (GRPCCall *)createRPCWithRequestsWriter:(GRXWriter *)requestsWriter {
-  return [[GRPCCall alloc] initWithHost:util::WrapNSStringNoCopy(self.databaseInfo->host())
+  return [[GRPCCall alloc] initWithHost:util::WrapNSString(self.databaseInfo->host())
                                    path:@"/google.firestore.v1beta1.Firestore/Listen"
                          requestsWriter:requestsWriter];
 }
@@ -716,7 +717,7 @@ static const NSTimeInterval kIdleTimeout = 60.0;
 }
 
 - (GRPCCall *)createRPCWithRequestsWriter:(GRXWriter *)requestsWriter {
-  return [[GRPCCall alloc] initWithHost:util::WrapNSStringNoCopy(self.databaseInfo->host())
+  return [[GRPCCall alloc] initWithHost:util::WrapNSString(self.databaseInfo->host())
                                    path:@"/google.firestore.v1beta1.Firestore/Write"
                          requestsWriter:requestsWriter];
 }